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1. Easy-handling minimum mass laser target scaffold based on sub-millimeter air bubble -An example of laser plasma extreme ultraviolet generation

Author

Christopher S. A. Musgrave, Shuntaro Shoji, and Keiji Nagai

Subjects
Medicine, Science
Abstract

Abstract Low density materials can control plasma properties of laser absorption, which can enhance quantum beam generation. The recent practical extreme ultraviolet light (EUV) is the first industrial example of laser plasma source with low density targets. Here we propose an easy-handling target source based on a hollow sub-millimeter microcapsule fabricated from polyelectrolyte cationic and anionic surfactant on air bubbles. The lightweight microcapsules acted as a scaffold for surface coating by tin (IV) oxide nanoparticles (22–48%), and then dried. As a proof of concept study, the microcapsules were ablated with a Nd:YAG laser (7.1 × 1010 W/cm2, 1 ns) to generate 13.5 nm EUV relatively directed to laser incidence. The laser conversion efficiency (CE) at 13.5 nm 2% bandwidth from the tin-coated microcapsule (0.8%) was competitive compared with bulk tin (1%). We propose that microcapsule aggregates could be utilized as a potential small scale/compact EUV source, and future quantum beam sources by changing the coating to other elements.

Published
2020
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2. Fabrication of high-concentration Cu-doped deuterated targets for fast ignition experiments

Author

Tomokazu Ikeda, Yumi Kaneyasu, Hitomi Hosokawa, Keisuke Shigemori, Takayoshi Norimastu, Marilou Cadatal-Raduban, Keiji Nagai, Sadaoki Kojima, Yuki Abe, Eisuke Miura, Yoneyoshi Kitagawa, Mao Takemura, Yubo Wang, Jinyuan Dun, Shuwang Guo, Shoui Asano, Ryunosuke Takizawa, Shinsuke Fujioka, Hiroyuki Shiraga, Yasunobu Arikawa, Tetsuo Ozaki, Akifumi Iwamoto, Hitoshi Sakagami, Hiroshi Sawada, Yoshitaka Mori, and Kohei Yamanoi

Subjects
fast ignition experiments, laser target, neutron detection, x-ray tracer, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

In high-energy-density physics, including inertial fusion energy using high-power lasers, doping tracer atoms and deuteration of target materials play an important role in diagnosis. For example, a low-concentration Cu dopant acts as an x-ray source for electron temperature detection while a deuterium dopant acts as a neutron source for fusion reaction detection. However, the simultaneous achievement of Cu doping, a deuterated polymer, mechanical toughness and chemical robustness during the fabrication process is not so simple. In this study, we report the successful fabrication of a Cu-doped deuterated target. The obtained samples were characterized by inductively coupled plasma optical emission spectrometry, differential scanning calorimetry and Fourier transform infrared spectroscopy. Simultaneous measurements of Cu K-shell x-ray emission and beam fusion neutrons were demonstrated using a petawatt laser at Osaka University.

Published
2022
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4. Recent Developments in the Use of Heterogeneous Semiconductor Photocatalyst Based Materials for a Visible-Light-Induced Water-Splitting System—A Brief Review

Author

Prabhakarn Arunachalam, Keiji Nagai, Mabrook S. Amer, Mohamed A. Ghanem, Rajabathar Jothi Ramalingam, and Abdullah M. Al-Mayouf

Subjects
photoelectrochemistry, water oxidation, oxynitride, oxysulfide, visible light, organophotocatalyst, Chemical technology, TP1-1185, Chemistry, QD1-999
Abstract

Visible-light-driven photoelectrochemical (PEC) and photocatalytic water splitting systems featuring heterogeneous semiconductor photocatalysts (oxynitrides, oxysulfides, organophotocatalysts) signify an environmentally friendly and promising approach for the manufacturing of renewable hydrogen fuel. Semiconducting electrode materials as the main constituents in the PEC water splitting system have substantial effects on the device’s solar-to-hydrogen (STH) conversion efficiency. Given the complication of the photocatalysis and photoelectrolysis methods, it is indispensable to include the different electrocatalytic materials for advancing visible-light-driven water splitting, considered a difficult challenge. Heterogeneous semiconductor-based materials with narrower bandgaps (2.5 to 1.9 eV), equivalent to the theoretical STH efficiencies ranging from 9.3% to 20.9%, are recognized as new types of photoabsorbents to engage as photoelectrodes for PEC water oxidation and have fascinated much consideration. Herein, we spotlight mainly on heterogenous semiconductor-based photoanode materials for PEC water splitting. Different heterogeneous photocatalysts based materials are emphasized in different groups, such as oxynitrides, oxysulfides, and organic solids. Lastly, the design approach and future developments regarding heterogeneous photocatalysts oxide electrodes for PEC applications and photocatalytic applications are also discussed.

Published
2021
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7. Effect of indium pre-flow on wavelength shift and crystal structure of deep green light emitting diodes

Author

Mohd Fairus Ahmad, Shamsul Amir Abdul Rais, Abdullah Sulaiman, Zainuriah Hassan, Hayatun Najiha binti Hussin, Mohd Natashah Norizan, Mohd Nazri Abd Rahman, Muhamad Ikram Md Taib, Yuka Akimoto, Ahmad Shuhaimi Abu Bakar, Dai Shoji, Keiji Nagai, and Yusnizam Yusuf

Subjects
Photoluminescence, Materials science, business.industry, Annealing (metallurgy), chemistry.chemical_element, 02 engineering and technology, Green-light, 021001 nanoscience & nanotechnology, medicine.disease_cause, 01 natural sciences, Electronic, Optical and Magnetic Materials, Blueshift, 010309 optics, Light intensity, chemistry, 0103 physical sciences, medicine, Optoelectronics, 0210 nano-technology, business, Layer (electronics), Indium, Ultraviolet
Abstract

金沢大学先端科学・社会共創推進機構, To produce a deep green (530 nm–570 nm) LED, the suitable indium (In) composition in the InxGa1-xN/GaN multi-quantum well (MQW) structure is crucial because a lower indium composition will shift the wavelength of emission towards the ultraviolet region. In this paper, we clarify the effects of an indium-rich layer to suppress such blue shifting, especially after the annealing process. According to characterizations by the uses of XRD and TEM, narrowing of the MQW layer was observed by the indium capping, while without the capping, the annealing results in a slight narrowing of MQW on the nearest layer to the p-type layer. By adding an indium capping layer, the blue shift of the photoluminescence was also suppressed and a slight red shift to keep green emission was observed. Such photoluminescence properties were consistent with the tiny change of the MQW as seen in the XRD and TEM characterizations.

Published
2021

8. Probing Gluon Spin-Momentum Correlations in Transversely Polarized Protons through Midrapidity Isolated Direct Photons in p↑+p Collisions at s=200 GeV

Author

S. F. Pate, Y. L. Yamaguchi, C. Xu, D. Ivanishchev, V. Papavassiliou, Hari Guragain, C. E. Perezlara, H. Asano, A. Sexton, T. Murakami, P. Montuenga, Y. Riabov, R. Seto, N. Grau, T. W. Danley, Takafumi Niida, J. Huang, A. Franz, J. Runchey, A. Sen, Prakhar Garg, K. A. Drees, N. Feege, Kenta Shigaki, R. Cervantes, Iu. Mitrankov, L. Zou, J. Bryslawskyj, J. E. Frantz, D. Reynolds, M. Rosati, B. Mulilo, Sándor Lökös, Tamás Csörgő, K. N. Barish, A. S. Nyanin, J. Klatsky, S. Zharko, N. Cronin, A. Deshpande, Dillon Scott Fitzgerald, Kei Nagashima, M. Snowball, D. McGlinchey, R. A. Soltz, N. Ramasubramanian, H. En'yo, Alexei Khanzadeev, M. J. Leitch, V. Canoa Roman, John Hill, M. Tomášek, D. E. Fields, X. Jiang, Rachid Nouicer, Xiong Wang, A. N. Zelenski, S. P. Sorensen, B. Kurgyis, B. V. Jacak, Minghui Liu, Brajesh K. Singh, G. J. Ottino, Toru Sugitate, W. Peng, P. W. Stankus, Kensuke Homma, I. J. Choi, M. L. Brooks, L. Bichon, C. L. Woody, M. Alfred, M. Grosse Perdekamp, Kenneth Francis Read, Y. J. Kwon, J. B. Choi, X. He, A. Berdnikov, Y. H. Leung, Raphael Noel Tieulent, A. V. Kazantsev, F. Giordano, Satoshi Sato, S. Kudo, R. Corliss, N. S. Bandara, Vladimir Samsonov, Christine Nattrass, T. Hachiya, S. K. Park, M. I. Nagy, Dipak Kumar Mishra, Kenichi Imai, Petr Gallus, T. O. S. Haseler, D. A. Loomis, D. Kapukchyan, Jong-Min Park, Taku Gunji, G. D. N. Perera, Qiao Xu, David Olle Rickard Silvermyr, Y. Goto, M. Phipps, Motoi Inaba, T. Nagashima, Y. Fukuda, I. V. Sourikova, Hideki Hamagaki, W. Fan, G. David, T. Todoroki, E. J. Mannel, K. I. Hahn, J. G. Lajoie, S. Lee, Jennifer E. Perry, Xiao-yan Li, Alexander Milov, J. Hanks, Hiroyuki Sako, M. Patel, N. Apadula, A. Durum, A. Iordanova, Keiji Nagai, A. Drees, S. H. Lim, S. Y. Han, Z. Ji, D. Yu Peressounko, A. Yanovich, I. Nakagawa, Z. Rowan, Dennis Perepelitsa, M. Mendoza, S. Karthas, J. L. Nagle, C. Pinkenburg, D. Kotov, D. S. Jumper, Kyoichiro Ozawa, D. P. Morrison, A. Sukhanov, K. Kurita, S. Campbell, M. Csanad, S. P. Stoll, G. Nukazuka, Min-Hye Kim, G. Tarnai, H. Ge, K. Nakano, Z. Sun, W. E. Sondheim, Arkadiy Taranenko, S. H. Lee, I. Tserruya, M. Jezghani, D. Larionova, T. Majoros, D. Sharma, V. Singh, A. Hodges, T. Shioya, R. Esha, S. D. Rolnick, M. Slunečka, P. L. McGaughey, S. Tarafdar, V. Babintsev, N. Novitzky, R. P. Pisani, T. Koblesky, T. Moon, Senta Greene, Viktor Riabov, Serpil Yalcin, M. Sarsour, D. Jouan, Y. Corrales Morales, V. Bumazhnov, S. Nelson, Byung-Sik Hong, B. Fadem, E. O'Brien, K. L. Smith, M. Harvey, U. Acharya, M. McCumber, Anne Marie Sickles, J. Murata, Chong Kim, A. Bazilevsky, S. Bathe, M. Chiu, Dmitry Blau, B. Schaefer, C. P. Wong, P. V. Radzevich, M. Connors, T. A. Shibata, W. A. Zajc, L. Xue, Alexandre Lebedev, C. A. Ogilvie, T. K. Hemmick, E. J. Desmond, Eunja Kim, A. Denisov, J. S. Bok, G. Mitsuka, A. Pun, J. H. Kang, J. S. Haggerty, Sergey Fokin, K. DeBlasio, D. Isenhower, Tamas Novak, Balazs Ujvari, M. Giles, M. Mitrankova, I. E. Yushmanov, C. Gal, Klaus Dehmelt, Julia Velkovska, A. Khatiwada, D. Dixit, S. Mizuno, M. Beaumier, H. W. Van Hecke, B. Blankenship, Agneta Oskarsson, D. Kincses, John Matthew Durham, Y. Berdnikov, Y. Akiba, C. McKinney, Vaclav Vrba, K. Hill, Maya Hachiya Shimomura, R. S. Hollis, Y. I. Makdisi, M. M. Mondal, M. J. Tannenbaum, B. K. Schmoll, S. Esumi, Martin Purschke, C. A. Aidala, Alice Mignerey, S. Miyasaka, Shoichi Hasegawa, Takao Sakaguchi, A. D. Frawley, V. Andrieux, S. Huang, V. Khachatryan, A. Kingan, H. F. Hamilton, D. Kawall, B. Azmoun, K. Tanida, E. Kistenev, J. H. Yoo, R. Belmont, Zvi Hirsh Citron, P. Kline, A. Dion, I. Shein, J. Sun, V. R. Loggins, J. T. Mitchell, K. Sedgwick, N. Hotvedt, R. Seidl, Vladislav Manko, Mihael Makek, H. Yamamoto, C. L. Silva, A. Enokizono, Y. Watanabe, V. Pantuev, R. S. Towell, A. Timilsina, K. Lovasz, D. Lynch, M. Potekhin, T. Hoshino, D. Richford, A. S. Safonov, Yoshifumi Ueda, J. H. Do, C. L. Towell, N. Vukman, Timothy Thomas Rinn, H. Yu, T. Sumita, C. Y. Chi, M. S. Daugherity, C. P. Singh, J. D. Osborn, Inseok Yoon, R. Petti, B. M. Johnson, N. A. Lewis, M. Finger, J. Sziklai, M. Virius, J. D. Orjuela Koop, and Prashant Shukla

Subjects
Physics, Photon, Proton, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Strong interaction, General Physics and Astronomy, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, Momentum, 0103 physical sciences, High Energy Physics::Experiment, PHENIX detector, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract

Studying spin-momentum correlations in hadronic collisions offers a glimpse into a three-dimensional picture of proton structure. The transverse single-spin asymmetry for midrapidity isolated direct photons in p ↑ + p collisions at s = 200 GeV is measured with the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). Because direct photons in particular are produced from the hard scattering and do not interact via the strong force, this measurement is a clean probe of initial-state spin-momentum correlations inside the proton and is in particular sensitive to gluon interference effects within the proton. This is the first time direct photons have been used as a probe of spin-momentum correlations at RHIC. The uncertainties on the results are a 50-fold improvement with respect to those of the one prior measurement for the same observable, from the Fermilab E704 experiment. These results constrain gluon spin-momentum correlations in transversely polarized protons.

Published
2021

9. High performance photoanodic catalyst prepared from an active organic photovoltaic cell – high potential gain from visible light

Author

Keiji Nagai, Tetsuya Taima, Mohd Fairus Ahmad, Takayuki Kuwabara, Makoto Karakawa, Kohshin Takahashi, and Masahiro Nakano

Subjects
Materials science, Photoelectrochemical oxidation, 010405 organic chemistry, business.industry, Photovoltaic system, Photoelectrochemistry, Metals and Alloys, General Chemistry, engineering.material, 010402 general chemistry, 01 natural sciences, Catalysis, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Coating, PEDOT:PSS, Electrode, Materials Chemistry, Ceramics and Composites, engineering, Optoelectronics, business, Visible spectrum
Abstract

Photoelectrochemical oxidation of thiols was enhanced with a threshold potential of −0.35 V vs. Ag/AgCl by the use of a ZnPc/PCBM:P3HT/ZnO electode, which was prepared by removing the PEDOT:PSS/Au electrode of an inverted OPV device and coating it with ZnPc. A co-photocatalysis property of ZnPc was observed in the photoelectrochemistry and scanning Kelvin probe microscopy.

Published
2019

10. Molecular Design of Photocathode Materials for Hydrogen Evolution and Carbon Dioxide Reduction

Author

Go Sahara, Keiji Nagai, Soundarrajan Chandrasekaran, Murielle Chavarot-Kerlidou, Vincent Artero, Osamu Ishitani, Hiromu Kumagai, Christopher D. Windle, and Toshiyuki Abe

Subjects
chemistry.chemical_compound, Materials science, Hydrogen, chemistry, Formic acid, Photoelectrochemistry, chemistry.chemical_element, Photochemistry, Photocathode, Artificial photosynthesis, Catalysis, Carbon monoxide, Electrochemical reduction of carbon dioxide
Published
2019

11. Fabrication of disk-shaped, deuterated resorcinol/formaldehyde foam target for laser–plasma experiments

Author

Kohei Yamanoi, D. Golovin, Akifumi Yogo, Yumi Kaneyasu, Keiji Nagai, Takahisa Jitsuno, Takayoshi Norimatsu, Marilou Cadatal-Raduban, and Satoshi Shokita

Subjects
Nuclear and High Energy Physics, Fabrication, Materials science, Hydrogen, Proton, 020209 energy, Analytical chemistry, chemistry.chemical_element, 02 engineering and technology, Resorcinol, Plasma, Laser, 01 natural sciences, Atomic and Molecular Physics, and Optics, 010305 fluids & plasmas, Electronic, Optical and Magnetic Materials, law.invention, chemistry.chemical_compound, Nuclear Energy and Engineering, chemistry, Deuterium, Polymerization, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering
Abstract

Resorcinol/formaldehyde (RF) foam resin is an attractive material as a low-density target in high-power laser–plasma experiments because of its fine network structure, transparency in the visible region, and low-Z element (hydrogen, carbon, and oxygen) composition. In this study, we developed disk-shaped RF foam and deuterated RF foam targets with 40–200 μm thickness and approximately 100 mg/cm3 density having a network structure from 100 nm to a few micrometers cell size. By deuteration, the polymerization rate was drastically slowed down owing to kinetic isotope effects. These targets were used in high-power laser experiments where a megaelectronvolt proton beam was successfully generated.

Published
2021

12. Recent Developments in the Use of HeterogeneousSemiconductor Photocatalyst Based Materials for aVisible-Light-Induced Water-Splitting System—A Brief Review

Author

Mabrook S. Amer, Rajabathar Jothi Ramalingam, Keiji Nagai, Prabhakarn Arunachalam, Abdullah M. Al-Mayouf, and Mohamed A. Ghanem

Subjects
Materials science, Organophotocatalyst, Photoelectrochemistry, Nanotechnology, water oxidation, 02 engineering and technology, lcsh:Chemical technology, 010402 general chemistry, 01 natural sciences, Catalysis, photoelectrochemistry, lcsh:Chemistry, Oxynitride, lcsh:TP1-1185, Oxysulfide, Physical and Theoretical Chemistry, Visible light, business.industry, Energy conversion efficiency, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Semiconductor, lcsh:QD1-999, Hydrogen fuel, Photoelectrolysis, Photocatalysis, Water splitting, 0210 nano-technology, business, Photocatalytic water splitting
Abstract

金沢大学先端科学・社会共創推進機構, Visible-light-driven photoelectrochemical (PEC) and photocatalytic water splitting systems featuring heterogeneous semiconductor photocatalysts (oxynitrides, oxysulfides, organophotocatalysts) signify an environmentally friendly and promising approach for the manufacturing of renewable hydrogen fuel. Semiconducting electrode materials as the main constituents in the PEC water splitting system have substantial effects on the device’s solar-to-hydrogen (STH) conversion efficiency. Given the complication of the photocatalysis and photoelectrolysis methods, it is indispensable to include the different electrocatalytic materials for advancing visible-light-driven water splitting, considered a difficult challenge. Heterogeneous semiconductor-based materials with narrower bandgaps (2.5 to 1.9 eV), equivalent to the theoretical STH efficiencies ranging from 9.3% to 20.9%, are recognized as new types of photoabsorbents to engage as photoelectrodes for PEC water oxidation and have fascinated much consideration. Herein, we spotlight mainly on heterogenous semiconductor-based photoanode materials for PEC water splitting. Different heterogeneous photocatalysts based materials are emphasized in different groups, such as oxynitrides, oxysulfides, and organic solids. Lastly, the design approach and future developments regarding heterogeneous photocatalysts oxide electrodes for PEC applications and photocatalytic applications are also discussed. © 2021 by the authors.

Published
2021

13. Measurement of J/ψ at forward and backward rapidity in p+p , p+Al , p+Au , and He3+Au collisions at sNN=200 GeV

Author

J. B. Choi, D. Fitzgerald, Dipak Kumar Mishra, S. Karthas, D. Kotov, C. L. Woody, A. Berdnikov, A. Sukhanov, K. Kurita, Y. H. Leung, T. V. Moukhanova, D. S. Jumper, L. Zou, N. S. Bandara, M. Stepanov, Vladimir Samsonov, Christine Nattrass, R. Pak, M. Csanad, S. P. Stoll, T. Todoroki, R. Kitamura, D. Jouan, Petr Gallus, Min-Hye Kim, Hari Guragain, S. H. Lee, C. Y. Scarlett, P. Sett, T. Nagashima, K. Ozawa, I. V. Sourikova, Minghui Liu, S. Hasegawa, H. Asano, Z. Rowan, Kenneth Francis Read, J. L. Nagle, S. Bathe, M. Chiu, C. A. Ogilvie, S. Nelson, T. K. Hemmick, A. Sen, B. J. Ramson, V. S. Pantuev, K. DeBlasio, R. Pinson, Keiji Nagai, M. Mendoza, N. Apadula, A. Drees, S. Suzuki, A. Deshpande, H. Yamamoto, N. Feege, E. A. Gamez, R. S. Towell, D. Lynch, A. Meles, Takafumi Niida, J. Huang, H. Ge, B. Azmoun, K. Nakano, A. Pun, B. Kimelman, B. M. Johnson, Dmitry Blau, V. Bumazhnov, A. V. Kazantsev, W. E. Sondheim, K. Hashimoto, Prakhar Garg, K. Boyle, D. V. Perepelitsa, Xingguo Li, B. Komkov, Alice Mignerey, B. Bannier, Y. Watanabe, D. E. Fields, E. J. Desmond, S. P. Sorensen, S. Miyasaka, H. En'yo, T. Shioya, Norio Saito, M. J. Leitch, H. Yu, Y. Fukuda, B. V. Jacak, A. Enokizono, D. Dixit, Motoi Inaba, Animesh Datta, T. Sumita, C. Y. Chi, Prashant Shukla, John Hill, B. Sahlmueller, B. Kurgyis, S. F. Pate, Toru Sugitate, G. David, Kiyoshi Tanida, Jan Rak, S. H. Lim, X. Sun, Agneta Oskarsson, Takao Sakaguchi, A. Taranenko, R. Lacey, Brajesh K. Singh, G. J. Ottino, M. Potekhin, J. G. Lajoie, M. Alfred, Y. Riabov, E. Kistenev, D. Kincses, John Matthew Durham, V. R. Loggins, J. T. Mitchell, J. Bryslawskyj, Kenta Shigaki, J. A. Key, N. Hotvedt, R. Seidl, Michael William Phipps, S. Lee, Jennifer E. Perry, M. S. Daugherity, R. Cervantes, A. Iordanova, Y. Berdnikov, S. Y. Han, Y. Akiba, S. Ishimaru, V. Babintsev, C. McKinney, C. P. Singh, Vladislav Manko, Viktor Riabov, Serpil Yalcin, A. Adare, Balazs Ujvari, Y. J. Kwon, A. D. Frawley, A. S. Nyanin, R. Nishitani, M. Slunečka, M. Snowball, H. Nakagomi, T. Hoshino, N. A. Lewis, Rachid Nouicer, A. N. Zelenski, Vaclav Vrba, K. Hill, R. J. Petti, D. Ivanishchev, J. Sun, I. E. Yushmanov, A. S. White, V. Papavassiliou, C. E. Perezlara, P. L. McGaughey, Z. Wang, Byung-Sik Hong, T. Murakami, Chong Kim, A. Bazilevsky, N. N. Ajitanand, D. E. Mihalik, S. Huang, J. Sziklai, C. P. Wong, D. Richford, A. S. Safonov, M. Connors, I. J. Choi, B. Xia, W. A. Zajc, Wesley James Metzger, D. McGlinchey, S. Beckman, Yoshifumi Ueda, J. H. Do, G. D. N. Perera, Qiao Xu, ShinIchi Esumi, D. Silvermyr, L. Xue, P. Kline, A. Dion, M. Kurosawa, Alexandre Lebedev, C. L. Towell, N. Vukman, N. Novitzky, A. Denisov, Yuki Watanabe, Y. Zhai, J. H. Yoo, A. Timilsina, R. Belmont, D. Kawall, Shunji Nishimura, S. I. Morrow, K. A. Drees, A. Durum, R. P. Pisani, H. F. Hamilton, Maya Hachiya Shimomura, R. S. Hollis, S. Mizuno, Y. I. Makdisi, A. Franz, J. Runchey, A. Yanovich, N. Ramasubramanian, H. W. Van Hecke, U. Acharya, M. McCumber, Sergey Fokin, X. Jiang, J. Murata, Zvi Hirsh Citron, Kensuke Homma, I. Shein, C. L. Silva, J. Klatsky, M. Beaumier, M. J. Tannenbaum, K. Sedgwick, T. Novák, Mihael Makek, J. Hanks, Hiroyuki Sako, B. K. Schmoll, T. Majoros, D. Sharma, Anne Marie Sickles, B. Schaefer, J. S. Bok, Martin Purschke, C. A. Aidala, M. J. Skoby, Pawan Kumar Netrakanti, V. Andrieux, V. Khachatryan, M. I. Nagy, D. Kapukchyan, G. Mitsuka, A. Taketani, K. Lovasz, J. H. Kang, M. Rosati, J. S. Haggerty, Tamás Csörgő, S. Kudo, Jiangyong Jia, Y. Goto, D. Kleinjan, S. Campbell, K. L. Smith, Senta Greene, M. Virius, Yanjun Wu, E. J. Mannel, T. Rinn, C. Gal, B. Fadem, E. O'Brien, Klaus Dehmelt, Julia Velkovska, A. Khatiwada, R. A. Soltz, M. Grosse Perdekamp, F. Giordano, J. D. Orjuela Koop, T. Hachiya, S. K. Park, C. H. Chen, C. Pinkenburg, A. Manion, I. Ravinovich, Z. Ji, D. Yu Peressounko, G. Tarnai, Z. Sun, M. Bai, S. Tarafdar, J. D. Osborn, Inseok Yoon, Kei Nagashima, M. Finger, V. Canoa Roman, G. W. Kim, Raphael Noel Tieulent, Susumu Sato, Jong-Min Park, Taku Gunji, B. Mulilo, M. Patel, N. Cronin, M. Tomášek, S. Kanda, W. Peng, P. W. Stankus, S. Zhou, R. Esha, P. Montuenga, S. D. Rolnick, N. Grau, Iu. Mitrankov, Ajit Kumar Mohanty, T. A. Shibata, Kenichi Imai, T. O. S. Haseler, D. Isenhower, T. Moon, P. B. Diss, Hideki Hamagaki, W. Fan, K. I. Hahn, Alexander Milov, I. Nakagawa, D. P. Morrison, M. Boer, Sándor Lökös, K. N. Barish, Tatsuya Chujo, I. Tserruya, M. Jezghani, V. Singh, A. Hodges, S. Zharko, T. Koblesky, M. Sarsour, F. Wei, A. Glenn, P. V. Radzevich, Eunja Kim, M. L. Brooks, Jen-Chieh Peng, J. G. Rubin, X. He, J. E. Frantz, D. Reynolds, Xiong Wang, Dong Jo Kim, M. Wysocki, A. Mwai, Y. L. Yamaguchi, C. Xu, A. Sexton, R. Seto, T. W. Danley, and Alexei Khanzadeev

Subjects
Physics, 010308 nuclear & particles physics, Projectile, Nuclear Theory, Observable, Nuclear matter, Collision, 7. Clean energy, 01 natural sciences, Nuclear physics, Yield (chemistry), 0103 physical sciences, Quark–gluon plasma, High Energy Physics::Experiment, Rapidity, Impact parameter, Nuclear Experiment, 010306 general physics
Abstract

Charmonium is a valuable probe in heavy-ion collisions to study the properties of the quark gluon plasma, and is also an interesting probe in small collision systems to study cold nuclear matter effects, which are also present in large collision systems. With the recent observations of collective behavior of produced particles in small system collisions, measurements of the modification of charmonium in small systems have become increasingly relevant. We present the results of J/ψ measurements at forward and backward rapidity in various small collision systems, p+p, p+Al, p+Au, and He3+Au, at sNN=200 GeV. The results are presented in the form of the observable RAB, the nuclear modification factor, a measure of the ratio of the J/ψ invariant yield compared to the scaled yield in p+p collisions. We examine the rapidity, transverse momentum, and collision centrality dependence of nuclear effects on J/ψ production with different projectile sizes p and He3, and different target sizes Al and Au. The modification is found to be strongly dependent on the target size, but to be very similar for p+Au and He3+Au. However, for 0%–20% central collisions at backward rapidity, the modification factor for He3+Au is found to be smaller than that for p+Au, with a mean fit to the ratio of 0.89±0.03(stat)±0.08(syst), possibly indicating final state effects due to the larger projectile size.

Published
2020

14. The asymmetry of antimatter in the proton

Author

T. J. Hague, P. E. Reimer, D.S. Su, N. C. R. Makins, M. S. Daugherity, S. Nara, Z. Ye, S. Watson, K. Liu, F. Sanftl, S. Miyasaka, A. S. Tadepalli, N. D. Kitts, K. Nakahara, Jinyuan Wu, Yuta Kudo, B. G. Tice, Jen-Chieh Peng, B. J. Ramson, S. Sawada, I. A. Mooney, A. B. Wickes, R. Guo, J. Dove, B. P. Dannowitz, B. Kerns, C. Leung, Andreas Klein, M. Mesquita de Medeiros, D. F. Geesaman, Andrew Puckett, D. Kleinjan, P. L. McGaughey, Wolfgang Lorenzon, R. S. Towell, J. G. Rubin, M. Diefenthaler, S. Uemura, C. N. Brown, Randall Evan McClellan, C. Ayuso, A. Chen, R. J. Holt, Shivangi Prasad, Z. Xi, W. C. Chang, Keiji Nagai, L. Guo, K. Nakano, L. El Fassi, C. L. Barker, S. G. Wang, Christine Angela Aidala, J. Arrington, T. Sawada, P.-J. Lin, E. R. Kinney, Mae Teo, D. H. Morton, D. C. Christian, Y. Miyachi, T. A. Shibata, D. Isenhower, Y. Goto, Ronald Gilman, M. B. C. Scott, and Minghui Liu

Subjects
Quark, Particle physics, Proton, General Science & Technology, High Energy Physics::Lattice, Strong interaction, Nuclear Theory, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, Quantum chromodynamics, Multidisciplinary, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Gluon, High Energy Physics - Phenomenology, Pair production, Antimatter, Quark–gluon plasma, High Energy Physics::Experiment
Abstract

The fundamental building blocks of the proton, quarks and gluons, have been known for decades. However, we still have an incomplete theoretical and experimental understanding of how these particles and their dynamics give rise to the quantum bound state of the proton and its physical properties, such as for example its spin. The two up and the single down quarks that comprise the proton in the simplest picture account only for a few percent of the proton mass, the bulk of which is in the form of quark kinetic and potential energy and gluon energy from the strong force. An essential feature of this force, as described by quantum chromodynamics, is its ability to create matter-antimatter quark pairs inside the proton that exist only for a very short time. Their fleeting existence makes the antimatter quarks within protons difficult to study, but their existence is discernible in reactions where a matter-antimatter quark pair annihilates. In this picture of quark-antiquark creation by the strong force, the probability distributions as a function of momentum for the presence of up and down antimatter quarks should be nearly identical, since their masses are quite similar and small compared to the mass of the proton. In the present manuscript, we show evidence from muon pair production measurements that these distributions are significantly different, with more abundant down antimatter quarks than up antimatter quarks over a wide range of momentum. These results revive interest in several proposed mechanisms as the origin of this antimatter asymmetry in the proton that had been disfavored by the previous results and point to the future measurements that can distinguish between these mechanisms., 10 pages, 5 figures, 5 tables; Matches published version

Published
2020

15. Nuclear-modification factor of charged hadrons at forward and backward rapidity in p + Al and p + Au collisions at sNN=200GeV

Author

Alice Mignerey, T. Hoshino, S. Miyasaka, Martin Purschke, C. A. Aidala, I. Tserruya, W. J. Metzger, D. Richford, A. S. Safonov, Motoi Inaba, Takao Sakaguchi, M. Jezghani, V. Singh, A. Hodges, N. Apadula, A. Drees, S. Ishimaru, A. D. Frawley, R. A. Soltz, P. Montuenga, N. Grau, A. Sen, S. Huang, V. S. Pantuev, Iu. Mitrankov, M. Snowball, H. F. Hamilton, T. Koblesky, Yoshifumi Ueda, J. H. Do, M. Sarsour, C. L. Towell, N. Vukman, Maya Hachiya Shimomura, R. S. Hollis, Mate Csanad, A. Iordanova, S. Y. Han, M. Slunečka, P. L. McGaughey, M. J. Skoby, M. Grosse Perdekamp, F. Giordano, T. Hachiya, I. J. Choi, Y. I. Makdisi, Min-Hye Kim, S. H. Lee, C. Y. Scarlett, S. Karthas, D. Kawall, D. Kotov, John Hill, D. McGlinchey, V. Andrieux, V. Khachatryan, S. Park, H. En'yo, B. Kurgyis, N. Novitzky, M. J. Tannenbaum, D. S. Jumper, Toru Sugitate, B. K. Schmoll, P. V. Radzevich, Z. Ji, A. V. Kazantsev, Arkadiy Taranenko, S. P. Stoll, K. A. Drees, R. P. Pisani, D. Yu Peressounko, M. J. Leitch, Dennis Perepelitsa, I. Shein, M. McCumber, Eunja Kim, J. Murata, Alexander Milov, K. Sedgwick, M. Beaumier, R. Nishitani, S. Nelson, Mihael Makek, A. Deshpande, S. Suzuki, H. Yamamoto, Z. Wang, Y. Fukuda, Alexei Khanzadeev, I. Nakagawa, Y. J. Kwon, K. L. Smith, G. David, J. Klatsky, Takafumi Niida, J. Huang, J. B. Choi, Viktor Riabov, Kensuke Homma, A. Khatiwada, Sándor Lökös, K. N. Barish, A. Enokizono, S. Esumi, D. Jouan, Y. H. Leung, Kiyoshi Tanida, Senta Greene, Kyoichiro Ozawa, Dipak Kumar Mishra, Qiao Xu, D. Silvermyr, D. P. Morrison, Y. Watanabe, E. Kistenev, S. Bathe, M. Chiu, Prakhar Garg, T. Murakami, T. Majoros, Y. Riabov, J. Bryslawskyj, Kenta Shigaki, R. Cervantes, L. Zou, V. Babintsev, Minghui Liu, Byung-Sik Hong, Chong Kim, A. Bazilevsky, S. H. Lim, C. A. Ogilvie, T. K. Hemmick, S. Zharko, D. Sharma, B. Fadem, E. O'Brien, B. Azmoun, Alexandre Lebedev, A. Yanovich, Kenneth Francis Read, A. Pun, Anne Marie Sickles, A. S. Nyanin, J. Sun, S. I. Morrow, D. Lynch, Serpil Yalcin, B. Schaefer, S. Mizuno, Rachid Nouicer, A. N. Zelenski, Y. Zhai, Z. Rowan, A. Franz, J. Runchey, K. DeBlasio, C. Gal, J. S. Bok, M. Mendoza, Dmitry Blau, J. E. Frantz, Klaus Dehmelt, D. Reynolds, Julia Velkovska, C. L. Silva, M. Rosati, C. P. Wong, Prashant Shukla, P. Kline, Keiji Nagai, A. Dion, X. Jiang, Tamás Csörgő, Xiong Wang, S. F. Pate, H. W. Van Hecke, Zvi Hirsh Citron, M. Connors, W. A. Zajc, L. Xue, E. J. Desmond, H. Ge, K. Nakano, S. Kudo, S. Hasegawa, S. P. Sorensen, A. Denisov, W. E. Sondheim, M. L. Brooks, Y. Goto, Xiao-yan Li, D. Ivanishchev, J. Hanks, V. Papavassiliou, Sergey Fokin, C. E. Perezlara, Hiroyuki Sako, X. He, V. R. Loggins, J. T. Mitchell, S. Campbell, N. Hotvedt, T. Shioya, J. G. Lajoie, R. Seidl, Vladislav Manko, C. L. Woody, M. Alfred, A. Berdnikov, Michael William Phipps, S. Lee, Jennifer E. Perry, Balazs Ujvari, Petr Gallus, T. Nagashima, D. Dixit, I. E. Yushmanov, Y. L. Yamaguchi, I. V. Sourikova, C. Xu, A. Timilsina, Agneta Oskarsson, A. Sexton, Kenichi Imai, D. Kincses, John Matthew Durham, A. Sukhanov, K. Kurita, T. O. S. Haseler, R. Seto, T. W. Danley, Y. Berdnikov, Y. Akiba, C. McKinney, Hideki Hamagaki, W. Fan, K. I. Hahn, Vaclav Vrba, K. Hill, N. Cronin, Jong-Min Park, Taku Gunji, M. Tomášek, W. Peng, P. W. Stankus, M. Patel, J. D. Osborn, Inseok Yoon, M. Finger, S. D. Rolnick, G. Mitsuka, M. I. Nagy, D. Kapukchyan, T. A. Shibata, G. D. N. Perera, D. Isenhower, Tamas Novak, T. Moon, A. Durum, D. E. Fields, B. V. Jacak, Hari Guragain, Kei Nagashima, V. Canoa Roman, Raphael Noel Tieulent, Susumu Sato, K. Lovasz, H. Asano, N. Feege, E. A. Gamez, M. Virius, J. D. Orjuela Koop, Brajesh K. Singh, G. J. Ottino, R. S. Towell, J. H. Kang, J. S. Haggerty, H. Yu, T. Sumita, C. Y. Chi, J. H. Yoo, R. Belmont, E. J. Mannel, T. Rinn, M. S. Daugherity, C. P. Singh, R. Petti, B. M. Johnson, N. A. Lewis, J. Sziklai, C. Pinkenburg, N. S. Bandara, Vladimir Samsonov, Christine Nattrass, G. Tarnai, T. Todoroki, Z. Sun, J. L. Nagle, S. Tarafdar, and V. Bumazhnov

Subjects
Physics, 010308 nuclear & particles physics, Hadron, Parton, Modification factor, 01 natural sciences, Nuclear physics, Distribution function, Pseudorapidity, 0103 physical sciences, Rapidity, Multiplicity (chemistry), Nuclear Experiment, 010306 general physics, Nucleon
Abstract

The PHENIX experiment has studied nuclear effects in p+Al and p+Au collisions at sNN=200GeV on charged hadron production at forward rapidity (1.4

Published
2020

16. Photoelectrochemical and photocatalytic investigation of the oxidative formation of H2 from a borane-ammonia complex using an organic p-n bilayer comprising a p-type cobalt phthalocyanine and an n-type perylene derivative

Author

Keiji Nagai, Yuka Sato, Kentaro Fujine, and Toshiyuki Abe

Subjects
General Chemical Engineering, Bilayer, Photoelectrochemistry, 02 engineering and technology, Borane, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, 0104 chemical sciences, Analytical Chemistry, Ammonia, chemistry.chemical_compound, chemistry, Electrochemistry, Photocatalysis, 0210 nano-technology, Perylene, Derivative (chemistry), Faraday efficiency
Abstract

An organic p-n bilayer photocatalyst, comprising a perylene derivative (PTCBI, n-type) and cobalt phthalocyanine (CoPc, n-type), is utilized for the oxidative formation of molecular hydrogen (H2) from a borane-ammonia complex (NH3BH3, AB). The formation of H2 occurs photocatalytically at the surface of CoPc in the organo-bilayer, along with the reduction of O2 by a reducing power generated at PTCBI. The mechanism to illustrate the H2-formation from AB by the organo-photocatalyst may be different from that of the conventional photocatalysis by inorganic semiconductors. To further understand the mechanism of H2-formation, photoelectrochemistry is further investigated using the PTCBI/CoPc bilayer as a photoanode. Considering the resulting faradaic efficiency for H2-formation, at least two possible equations have to be suggested: BH3OH− (intermediate) + 3OH− → BO2− + 3/2H2 + 2H2O + 3e− and BH3OH− (intermediate) + 2OH− → BO2− + 2H2 + H2O + 2e−.

Published
2018

17. Enhanced oxidation power in photoelectrocatalysis based on a micrometer-localized positive potential in a terrace hetero p–n junction

Author

Motoya Suzuki, Mohd Fairus Ahmad, Toshiyuki Abe, and Keiji Nagai

Subjects
Materials science, Organic solar cell, business.industry, Bilayer, Photoelectrochemistry, 02 engineering and technology, Photon energy, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, Modeling and Simulation, Optoelectronics, General Materials Science, Quantum efficiency, Electric potential, 0210 nano-technology, business, p–n junction, Volta potential
Abstract

金沢大学先端科学・社会共創推進機構, Generally, p–n junction-based solar energy conversion has the disadvantage of a loss in potential gain in comparison with the photon energy. In this study, we found a more positive potential for a lateral domain interface of p–n junction than for a conventional p–n junction. A terrace bilayer (TB) p–n junction of phthalocyanine (H2Pc) and 3,4,9,10-perylenetetracarboxylic-bis-benzimidazole (PTCBI) was studied using scanning Kelvin probe microscopy (SKPM), and its electronic properties were analyzed using the contact potential difference (VCPD) data. The analysis of VCPD in the single layer region and the bilayer region (BLR) indicated a vacuum level shift through the electron transfer from PTCBI into indium tin oxide (ITO), from H2Pc into ITO and from H2Pc into PTCBI. Furthermore, the comparison of these VCPD data indicated a micrometer-localized positive potential in the boundary region (BDR) of the terrace bilayer structure of p-type on n-type. The gain difference of the VCPD reached +0.1 V in comparison with the BLR. The phenomena can be explained as a lateral dipole at the p–n junction. Similar phenomena were observed in TB-H2Pc/C60/ITO and TB-H2Pc/PTCBI/Au. The gain was extracted as oxidation power in photoelectrochemistry; i.e., at −0.2 V vs. Ag/AgCl a greater anodic current was observed for a patterned terrace bilayer electrode. Additionally, as a photocatalyst film (i.e., a H2Pc (dot)/PTCBI/PTFE membrane filter), the p–n dot terrace structure showed a higher quantum efficiency (5.1%) than that of the bilayer (3.2%) for the decomposition of acetic acid. The present design and method were utilized to obtain an efficient photocatalyst, especially through the mitigation of potential loss from the photon energy to redox powers without changing the molecular component. © 2018, The Author(s).

Published
2018

18. Novel photocatalytic material of organic p–n bilayer responsive to near-infrared energy

Author

Toshiyuki Abe, Megumi Ueda, Takatoshi Hiroya, Masachika Sanyoushi, Keiji Nagai, and Daiki Mendori

Subjects
Photocurrent, Materials science, Process Chemistry and Technology, Bilayer, Inorganic chemistry, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, Catalysis, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Phase (matter), Phthalocyanine, Photocatalysis, Irradiation, 0210 nano-technology, Derivative (chemistry), Perylene, General Environmental Science
Abstract

An organic p–n bilayer, comprising of an n-type perylene derivative (PTCBI) and p-type lead phthalocyanine (PbPc), was prepared and examined in terms of photoelectrode in the water phase. The PTCBI/PbPc bilayer functioned as a photoanode, which generated a photocurrent due to the oxidation of reactant (i.e., Fe II (CN) 6 4− ) at the PbPc surface. Furthermore, the organo-bilayer also induced a photocatalytic reaction that originated from the oxidising and reducing powers produced at the PbPc and PTCBI, respectively. Based on the photoelectrochemical and photocatalytic studies, it has been noted that the PTCBI/PbPc bilayer can respond to the wide spectrum of solar energy (i.e., 400–1100 nm). However, on using metal-free phthalocyanine (H 2 Pc, p-type) as a reference p-type layer and its application as a photocatalyst material in combination with PTCBI, the generated PTCBI/H 2 Pc bilayer did not show any photocatalysis particularly under the control irradiation of 700–1200 nm. Thus, the present work demonstrated that the utilisation of a photocatalytic material responding to near-infrared energy is effective towards efficient output into product.

Published
2017

19. A visible-light-induced photoelectrochemical water-splitting system featuring an organophotocathode along with a tungsten oxide photoanode

Author

Yuto Kawai, Toshiyuki Abe, and Keiji Nagai

Subjects
Auxiliary electrode, Electrolysis of water, business.industry, Chemistry, General Chemical Engineering, Bilayer, Nanotechnology, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Photocathode, 0104 chemical sciences, Electron transfer, Optoelectronics, Water splitting, Photoelectrochemical process, 0210 nano-technology, business, Visible spectrum
Abstract

A photoelectrochemical water-splitting system featuring an organo-photocathode of a p-n bilayer was studied, where WO3 was simultaneously utilized as a photoanode. Stoichiometric formation of H-2 and O-2 was found to occur due to the decomposition of water. In the reference system of a WO3 photoanode and Pt counter electrode, bias voltages more than 0.4 V were needed to be applied for water splitting; however, the present system successfully led to water decomposition by applying only a low voltage of 0.1 V to the system. In the present water-splitting system, oxidizing and reducing powers can be separately generated at the WO3 photoanode and organo-photocathode, respectively, which is distinct from the reference system. Furthermore, electron transfer from WO3 (conduction band) to the hole-retained p-type layer (valence band) in the organo-photocathode can efficiently occur for completing the photoelectrochemical process, thus, resulting in a high concentration of holes available for rate-limiting O-2 evolution at WO3 on the basis of efficient charge separation.

Published
2017

20. A dual-functional organic p–n bilayer catalyst comprising a perylene derivative and cobalt phthalocyanine working under illumination and in the dark

Author

Takashi Itoh, Keiji Nagai, Masato Okumura, Toshiyuki Abe, and Yuko Kikuchi

Subjects
chemistry.chemical_classification, Renewable Energy, Sustainability and the Environment, Bilayer, Inorganic chemistry, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, 0104 chemical sciences, Catalysis, chemistry.chemical_compound, chemistry, Oxidizing agent, Thiol, Photocatalysis, General Materials Science, Irradiation, 0210 nano-technology, Derivative (chemistry), Perylene
Abstract

In this study, we show dual-functional catalysis for down-hill reaction by an organic p–n bilayer with and without irradiation. The organic p–n bilayer, composed of 3,4,9,10-perylenetetracarboxylic-bis-benzimidazole (PTCBI, n-type) and cobalt phthalocyanine (CoPc, p-type), is employed as a photocatalyst in the presence of 2-mercaptoethanol. The PTCBI/CoPc bilayer can induce the photocatalytic oxidation of thiol along with the reduction of H+ to H2 by oxidizing and reducing powers generated at CoPc and PTCBI surfaces, respectively, through a series of photophysical events within the organic bilayer. Moreover, the aforementioned reaction can also be found to occur in the dark, due to the catalysis of the bilayer. The distinct oxidation states of CoPc (i.e. CoIIPc in the dark and CoIIIPc under illumination) are responsible for thiol oxidation, where the reducing power for H2 evolution can consist of the electrons released from thiol in the dark and the electron carriers generated under illumination. In this paper, photoelectrochemical and photocatalytic results have been presented to discuss the details of the two types of catalyses by the PTCBI/CoPc bilayer.

Published
2017

21. Easy-handling minimum mass laser target scaffold based on sub-millimeter air bubble -An example of laser plasma extreme ultraviolet generation

Author

Keiji Nagai, Christopher S. A. Musgrave, and Shuntaro Shoji

Subjects
Materials science, Extreme ultraviolet lithography, Science, Energy science and technology, chemistry.chemical_element, 02 engineering and technology, engineering.material, 01 natural sciences, Article, law.invention, Coating, law, Nanoscience and technology, 0103 physical sciences, 010302 applied physics, Multidisciplinary, business.industry, Energy conversion efficiency, Plasma, 021001 nanoscience & nanotechnology, Laser, Surface coating, Chemistry, chemistry, Optics and photonics, Extreme ultraviolet, engineering, Optoelectronics, Medicine, 0210 nano-technology, business, Tin
Abstract

金沢大学先端科学・社会共創推進機構, Low density materials can control plasma properties of laser absorption, which can enhance quantum beam generation. The recent practical extreme ultraviolet light (EUV) is the first industrial example of laser plasma source with low density targets. Here we propose an easy-handling target source based on a hollow sub-millimeter microcapsule fabricated from polyelectrolyte cationic and anionic surfactant on air bubbles. The lightweight microcapsules acted as a scaffold for surface coating by tin (IV) oxide nanoparticles (22–48%), and then dried. As a proof of concept study, the microcapsules were ablated with a Nd:YAG laser (7.1 × 1010 W/cm2, 1 ns) to generate 13.5 nm EUV relatively directed to laser incidence. The laser conversion efficiency (CE) at 13.5 nm 2% bandwidth from the tin-coated microcapsule (0.8%) was competitive compared with bulk tin (1%). We propose that microcapsule aggregates could be utilized as a potential small scale/compact EUV source, and future quantum beam sources by changing the coating to other elements. © 2020, The Author(s)., CC-BY 4.0

Published
2019

22. Nuclear Dependence of the Transverse Single-Spin Asymmetry in the Production of Charged Hadrons at Forward Rapidity in Polarized p+p , p+Al , and p+Au Collisions at sNN=200 GeV

Author

T. Murakami, Y. H. Leung, S. I. Morrow, Y. J. Kwon, A. Franz, J. Runchey, Maya Hachiya Shimomura, R. S. Hollis, Y. I. Makdisi, Hari Guragain, Dmitry Blau, N. Cronin, Y. Zhai, G. Tarnai, S. P. Sorensen, M. Sarsour, A. Iordanova, E. J. Desmond, M. J. Tannenbaum, H. Asano, B. Azmoun, A. Sen, B. K. Schmoll, Jong-Min Park, Taku Gunji, Martin Purschke, M. Patel, C. A. Aidala, Z. Sun, S. Y. Han, M. J. Skoby, P. Kline, A. Dion, M. Tomášek, V. Andrieux, Viktor Riabov, V. Khachatryan, M. Snowball, Balazs Ujvari, K. A. Drees, Alexander Milov, J. G. Lajoie, I. J. Choi, M. Beaumier, Serpil Yalcin, I. E. Yushmanov, R. Belmont, V. Bumazhnov, Michael William Phipps, S. Lee, W. Peng, P. W. Stankus, I. Nakagawa, R. Seidl, Jennifer E. Perry, Alexei Khanzadeev, G. D. N. Perera, S. Tarafdar, Byung-Sik Hong, Chong Kim, A. Bazilevsky, S. Esumi, C. P. Wong, J. B. Choi, S. D. Rolnick, Alice Mignerey, N. Novitzky, V. R. Loggins, J. T. Mitchell, M. Connors, W. A. Zajc, S. Miyasaka, L. Zou, Alexandre Lebedev, L. Xue, N. Feege, Dipak Kumar Mishra, J. Klatsky, A. Denisov, R. P. Pisani, H. En'yo, M. J. Leitch, E. A. Gamez, A. Durum, D. P. Morrison, M. McCumber, S. Nelson, Sergey Fokin, B. M. Johnson, Takafumi Niida, J. Huang, Takao Sakaguchi, A. Enokizono, N. Hotvedt, N. S. Bandara, Vladimir Samsonov, Christine Nattrass, Minghui Liu, S. Ishimaru, A. D. Frawley, Kei Nagashima, V. Canoa Roman, A. Taranenko, Kenichi Imai, T. O. S. Haseler, Vladislav Manko, S. Huang, Raphael Noel Tieulent, Prakhar Garg, Kenneth Francis Read, I. Tserruya, M. Jezghani, E. Kistenev, A. Pun, Susumu Sato, Prashant Shukla, T. Hoshino, Wesley James Metzger, M. Slunečka, V. Singh, A. Hodges, S. F. Pate, E. J. Mannel, H. F. Hamilton, A. V. Kazantsev, Hideki Hamagaki, W. Fan, T. Todoroki, T. Rinn, V. Babintsev, S. Hasegawa, J. L. Nagle, Brajesh K. Singh, G. J. Ottino, D. Richford, A. S. Safonov, T. A. Shibata, D. V. Perepelitsa, J. Sun, K. I. Hahn, T. Koblesky, D. E. Fields, X. Jiang, Min-Hye Kim, X. He, Yoshifumi Ueda, J. H. Do, B. V. Jacak, Y. Fukuda, C. Pinkenburg, Motoi Inaba, D. Isenhower, T. Moon, G. David, C. L. Towell, N. Vukman, K. Dehmelt, D. Ivanishchev, P. Montuenga, A. Sukhanov, K. Kurita, V. Papavassiliou, Kyoichiro Ozawa, Z. Wang, Xiao-yan Li, J. Hanks, C. E. Perezlara, D. McGlinchey, S. H. Lee, Hiroyuki Sako, M. I. Nagy, C. Y. Scarlett, N. Grau, J. H. Kang, P. V. Radzevich, J. S. Haggerty, Iu. Mitrankov, D. Kawall, R. S. Towell, P. L. McGaughey, Eunja Kim, D. Kapukchyan, N. Apadula, K. L. Smith, A. Drees, A. Timilsina, J. E. Frantz, S. Suzuki, M. Virius, Qiao Xu, D. Reynolds, C. L. Silva, J. D. Orjuela Koop, Xiong Wang, S. Park, J. Murata, Zvi Hirsh Citron, Kensuke Homma, M. Alfred, G. Mitsuka, T. Novák, S. H. Lim, S. Bathe, I. Shein, M. Chiu, Sándor Lökös, A. Yanovich, K. N. Barish, C. A. Ogilvie, H. Yu, K. Tanida, T. K. Hemmick, D. Lynch, K. Sedgwick, K. Lovasz, T. Sumita, S. Zharko, C. Y. Chi, D. Dixit, Mihael Makek, A. Deshpande, H. Yamamoto, Yasutada Akiba, C. Gal, K. DeBlasio, Julia Velkovska, John Hill, T. Hachiya, J. D. Osborn, Inseok Yoon, M. Rosati, B. Kurgyis, S. Karthas, Toru Sugitate, D. Kotov, M. Finger, Tamás Csörgő, Y. Watanabe, D. S. Jumper, S. Kudo, M. S. Daugherity, C. P. Singh, V. Pantuev, S. Mizuno, M. Csanad, S. P. Stoll, R. Petti, Y. Goto, N. A. Lewis, Z. Rowan, M. Mendoza, H. W. Van Hecke, J. Sziklai, M. L. Brooks, D. Jouan, H. Ge, S. Campbell, K. Nakano, W. E. Sondheim, Agneta Oskarsson, D. Kincses, John Matthew Durham, Y. Berdnikov, C. McKinney, Y. L. Yamaguchi, Vaclav Vrba, K. Hill, C. Xu, A. Sexton, R. Seto, T. W. Danley, R. A. Soltz, M. Grosse Perdekamp, F. Giordano, David Olle Rickard Silvermyr, Z. Ji, D. Yu Peressounko, Senta Greene, B. Fadem, E. O'Brien, Y. Riabov, J. Bryslawskyj, Kenta Shigaki, R. Cervantes, A. S. Nyanin, Rachid Nouicer, A. N. Zelenski, C. L. Woody, A. Berdnikov, Petr Gallus, T. Nagashima, I. V. Sourikova, Keiji Nagai, J. H. Yoo, T. Shioya, T. Majoros, D. Sharma, Anne Marie Sickles, B. Schaefer, J. S. Bok, and R. Nishitani

Subjects
Physics, media_common.quotation_subject, Nuclear Theory, Hadron, General Physics and Astronomy, 01 natural sciences, Asymmetry, Nuclear physics, Momentum, Transverse plane, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Spin (physics), media_common
Abstract

We report on the nuclear dependence of transverse single-spin asymmetries (TSSAs) in the production of positively charged hadrons in polarized p↑+p, p↑+Al, and p↑+Au collisions at sNN=200 GeV. The measurements have been performed at forward rapidity (1.4<η<2.4) over the range of transverse momentum (1.8

Published
2019

23. Micro-optics for ultra-intense lasers

Author

Malay Dalui, T. Madhu Trivikram, Gourab Chatterjee, Prashant Kumar Singh, Sheroy Tata, Y. Mishima, Amitava Adak, M. Krishnamurthy, Hideaki Habara, H. Sakagami, J. Jha, Amit D. Lad, K. A. Tanaka, P. Brijesh, G. Ravindra Kumar, R. Nagami, and Keiji Nagai

Subjects
010302 applied physics, Coupling, Materials science, business.industry, General Physics and Astronomy, Physics::Optics, 02 engineering and technology, 021001 nanoscience & nanotechnology, Laser, 01 natural sciences, lcsh:QC1-999, law.invention, Pedestal, Optics, law, Picosecond, 0103 physical sciences, Femtosecond, 0210 nano-technology, business, Inertial confinement fusion, Intensity (heat transfer), Excitation, lcsh:Physics
Abstract

金沢大学先端科学・社会共創推進機構, Table-top, femtosecond lasers provide the highest light intensities capable of extreme excitation of matter. A key challenge, however, is the efficient coupling of light to matter, a goal addressed by target structuring and laser pulse-shaping. Nanostructured surfaces enhance coupling but require “high contrast” (e.g., for modern ultrahigh intensity lasers, the peak to picosecond pedestal intensity ratio >1012) pulses to preserve target integrity. Here, we demonstrate a foam target that can efficiently absorb a common, low contrast 105 (in picosecond) laser at an intensity of 5 × 1018 W/cm2, giving ∼20 times enhanced relativistic hot electron flux. In addition, such foam target induced “micro-optic” function is analogous to the miniature plasma-parabolic mirror. The simplicity of the target—basically a structure with voids having a diameter of the order of a light wavelength—and the efficacy of these micro-sized voids under low contrast illumination can boost the scope of high intensity lasers for basic science and for table-top sources of high energy particles and ignition of laser fusion targets.

Published
2021

24. Fabrication Of Deep Green Light Emitting Diode On Bulk Gallium Nitride Substrate

Author

Rais, Shamsul Amir Abdul, Hassan, Zainuriah, Bakar, Ahmad Shuhaimi Abu, Yusuf, Yusnizam, Taib, Muhamad Ikram Md, Sulaiman, Abdullah Fadil, Hussin, Hayatun Najihah, Keiji, Nagai, Ahmad, Mohd Fairus, Yuka, Akimoto, Dai, Shoji, Rais, Shamsul Amir Abdul, Hassan, Zainuriah, Bakar, Ahmad Shuhaimi Abu, Yusuf, Yusnizam, Taib, Muhamad Ikram Md, Sulaiman, Abdullah Fadil, Hussin, Hayatun Najihah, Keiji, Nagai, Ahmad, Mohd Fairus, Yuka, Akimoto, and Dai, Shoji

Abstract

The indium composition in InxGa1-xN/GaN multi-quantum well structure e(MQW) is crucial because lower indium composition will shift the wavelength towards ultraviolet region. Nevertheless, at certain indium content in MQW, it will out diffuse from the MQW resulting in the wavelength shift from green to much shorter wavelength, after the annealing process for p-type activation. In this study, we had grown a full Light Emitting Diode device with the MQW layer at a relative high temperature for green LED with indium pre-flow at the top of n-type layer just beneath the MQW using Metal Organic Chemical Vapor Deposition (MOCVD). Transmission Electron Microscopy (TEM) image of the MQW prior and post the activation of p-type had been observed, which resulted in good contrast, showing the abruptness of the MQW layer of the device. Homogenous layers of InxGa1- xN/GaN has been observed. We also managed to reduce the wavelength shift of the device significantly. The optical, crystal properties of grown devices had been studied.

Published
2019

25. Electrochemical oxidation of ammonia by multi-wall-carbon-nanotube-supported Pt shell–Ir core nanoparticles synthesized by an improved Cu short circuit deposition method

Author

Mikka N. Gamo, Minoru Yonekawa, Keiji Nagai, Hikaru Ota, Eiji Kudo, Hidenobu Shiroishi, Ryo Shirasaka, and Seitaro Morita

Subjects
Chemistry, General Chemical Engineering, Inorganic chemistry, Nanoparticle, 02 engineering and technology, Carbon nanotube, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, 0104 chemical sciences, Analytical Chemistry, Catalysis, law.invention, Thermogravimetry, Reaction rate constant, X-ray photoelectron spectroscopy, Transmission electron microscopy, law, 0210 nano-technology
Abstract

Multi-wall-carbon-nanotube (MWCNT)-supported Pt shell–Ir core (Pt/Ir/MWCNT) nanoparticles were synthesized by an improved Cu short circuit deposition (ICSCD) method and were characterized by thermogravimetry (TG), transmission electron microscope (TEM), X-ray diffractometry (XRD), X-ray photon spectroscopy (XPS), and electrochemical measurements for ammonia oxidation catalysis activity. It was revealed that the overvoltage for the ammonia oxidation of Pt/Ir/MWCNT (0.52 V) at 1 μA cm − 2 ECSA is lower than those of Pt/MWCNT (0.55 V). The activation energies of the catalysis toward ammonia electrooxidation were estimated as 28.2 kJ (Pt/MWCNT), 27.8 kJ (Ir/MWCNT) and 33.6 kJ (Pt/Ir/MWCNT) at 0.60 V vs. RHE in 100 mM NH 3 –0.1 M KOH. On the basis of computational kinetic analysis of the chronoamperometric curves in ammonia solution, it was revealed that the apparent rate constant of ammonia oxidation of Pt/Ir/MWCNT is higher than that of Pt/MWCNT, suggesting that the electronic property of Pt was affected by the Ir core atoms.

Published
2015

26. Factors contributing to degradation of organic photovoltaic cells

Author

Masahiro Nakano, Kohshin Takahashi, Takayuki Kuwabara, Keiji Nagai, Kenji Suzuki, Tetsuya Taima, Takahiro Yamaguchi, and Makoto Karakawa

Subjects
Fullerene derivatives, Materials science, Photovoltaic system, Energy conversion efficiency, Light irradiation, Nanotechnology, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Continuous light, 01 natural sciences, Acceptor, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Biomaterials, Organic semiconductor, Materials Chemistry, Degradation (geology), Electrical and Electronic Engineering, 0210 nano-technology
Abstract

The performance of organic photovoltaic (OPV) cells has considerably improved over the past decade, and now exceeds an energy conversion efficiency of 10%, the benchmark for practical use. One factor contributing to this increase is the development of π-conjugated linear acceptor molecules as alternatives to fullerene derivatives. Although conversion efficiency is an important issue for practical applications, device stability is also necessary for commercialization of OPV technologies. To date, long-term stability has been examined in OPV devices based on fullerenes. However, the factors involved in performance degradation remain poorly understood. It is difficult to address this problem because of the multilayer nature of the devices and many factors involved in degradation. In recent OPV devices based on π-conjugated molecules as acceptors, there have been few reports on stability under continuous light irradiation. Ensuring the stability of the π-conjugated molecules under illumination and electrical operation is critical for achieving practical use of OPV devices. In this paper, we comprehensively analyzed OPV devices based on EH-IDTBR as an acceptor material. We identified a decrease in OPV performance of approximately 50% under 100-h light irradiation, which we attribute to increased resistance of the organic semiconductor layer. The increase in resistance was caused by a decrease in the number of carriers, suggesting that structural changes in the EH-IDTBR molecule are an important factor affecting degradation.

Published
2020

27. Pseudorapidity Dependence of Particle Production and Elliptic Flow in Asymmetric Nuclear Collisions of p+Al , p+Au , d+Au , and He3+Au at sNN=200 GeV

Author

N. S. Bandara, C. H. Chen, G. Tarnai, Vladimir Samsonov, Y. Riabov, Kenichi Imai, Z. Sun, Christine Nattrass, R. Lacey, T. O. S. Haseler, S. Bathe, S. Hasegawa, Kenta Shigaki, R. Cervantes, M. Chiu, M. I. Nagy, I. Tserruya, P. B. Diss, M. Jezghani, V. Singh, A. Hodges, A. Adare, S. Tarafdar, R. Nishitani, P. L. McGaughey, M. Phipps, C. A. Ogilvie, A. S. Nyanin, X. He, R. A. Soltz, D. Kapukchyan, Rachid Nouicer, A. N. Zelenski, T. Koblesky, T. K. Hemmick, Maya Hachiya Shimomura, R. S. Hollis, F. Wei, D. E. Mihalik, S. Beckman, B. J. Ramson, Hideki Hamagaki, W. Fan, Serpil Yalcin, G. David, T. Todoroki, M. Grosse Perdekamp, E. O. Lallow, Shunji Nishimura, K. A. Drees, F. Giordano, J. Rak, K. I. Hahn, J. Klatsky, J. L. Nagle, A. Glenn, P. V. Radzevich, Y. I. Makdisi, Ajit Kumar Mohanty, T. A. Shibata, D. Sharma, K. DeBlasio, Eunja Kim, A. V. Kazantsev, T. Hachiya, S. K. Park, R. S. Towell, Y. J. Kwon, Prashant Shukla, C. L. Woody, S. F. Pate, A. Pun, B. Kimelman, R. Pinson, S. Vazquez-Carson, Z. Rowan, Anne Marie Sickles, M. Mendoza, A. Berdnikov, K. L. Smith, B. Schaefer, K. Hashimoto, C. P. Wong, L. D. Liu, A. Mwai, J. H. Kang, M. Boer, M. J. Tannenbaum, J. S. Haggerty, Xingguo Li, P. Montuenga, N. N. Ajitanand, C. L. Silva, David Olle Rickard Silvermyr, B. K. Schmoll, N. Grau, Z. Ji, Alexander Milov, I. Nakagawa, N. Novitzky, D. P. Morrison, J. A. Key, D. Isenhower, Tamas Novak, T. Moon, Jaehyeok Yoo, M. Connors, W. A. Zajc, L. Xue, S. Syed, J. S. Bok, D. Yu Peressounko, Sándor Lökös, K. N. Barish, S. Zharko, Petr Gallus, T. Nagashima, A. Denisov, Yuki Watanabe, G. D. N. Perera, N. Apadula, Y. Fukuda, V. Bumazhnov, D. Dixit, N. Feege, A. Drees, Sergey Fokin, Koji Sato, Iu. Mitrankov, Jong-Min Park, Taku Gunji, Moonhee Kim, Dennis Perepelitsa, M. Patel, Kyoichiro Ozawa, L. Zou, D. Ivanishchev, I. V. Sourikova, Keiji Nagai, V. Papavassiliou, M. L. Brooks, Alice Mignerey, H. Ge, C. E. Perezlara, Mikhail Malaev, T. Murakami, E. J. Mannel, T. Rinn, K. Nakano, Motoi Inaba, N. Saito, S. Miyasaka, A. Durum, Minghui Liu, B. Kurgyis, C. Gal, S. Zhou, S. Karthas, A. Takeda, Julia Velkovska, Takao Sakaguchi, A. Sen, C. Pinkenburg, S. D. Rolnick, K. Dehmelt, J. Bryslawskyj, Kenneth Francis Read, M. Sarsour, A. Iordanova, S. Y. Han, D. Kotov, M. Rosati, Agneta Oskarsson, W. E. Sondheim, D. Kincses, John Matthew Durham, A. D. Frawley, S. I. Morrow, M. Tomášek, T. Majoros, Senta Greene, S. Kanda, W. Peng, M. Virius, Tamás Csörgő, D. S. Jumper, Y. Berdnikov, A. S. White, S. Huang, C. Ayuso, A. Franz, J. Runchey, C. Butler, D. J. Kim, P. W. Stankus, A. Meles, M. Csanad, S. P. Stoll, C. McKinney, S. Kudo, Wesley James Metzger, A. Deshpande, C. Xu, E. Kistenev, T. Shioya, M. Snowball, A. Sukhanov, H. F. Hamilton, Kei Nagashima, K. Kurita, K. Aoki, P. Sett, B. Fadem, E. O'Brien, R. P. Pisani, V. Canoa Roman, M. McCumber, I. J. Choi, G. W. Kim, Vaclav Vrba, K. Hill, D. McGlinchey, H. En'yo, M. J. Leitch, Brajesh K. Singh, G. J. Ottino, D. E. Fields, B. Xia, B. V. Jacak, J. Imrek, A. Sexton, Raphael Noel Tieulent, R. Pak, Takafumi Niida, Susumu Sato, J. Huang, H. Asano, R. Kitamura, Y. Goto, J. Sun, S. P. Sorensen, R. Seto, T. W. Danley, D. Jouan, Y. L. Yamaguchi, J. Jia, M. Stepanov, Prakhar Garg, B. Bannier, Hari Guragain, D. Kleinjan, S. Campbell, J. G. Lajoie, J. D. Orjuela Koop, M. Alfred, S. Lee, Jennifer E. Perry, S. Mizuno, H. W. Van Hecke, Viktor Riabov, Martin Purschke, C. A. Aidala, John Hill, M. J. Skoby, Y. Ito, Pawan Kumar Netrakanti, V. Andrieux, Radek Novotny, V. Khachatryan, N. Cronin, A. Manion, Y. H. Leung, B. Azmoun, I. Ravinovich, Toru Sugitate, P. Kline, A. Dion, M. Beaumier, M. Bai, S. Esumi, Z. Wang, M. S. Daugherity, C. P. Singh, R. Petti, B. M. Johnson, N. A. Lewis, V. Jorjadze, T. Elder, Qiao Xu, J. Sziklai, D. Kawall, J. D. Osborn, S. H. Lim, K. Tanida, Inseok Yoon, A. Yanovich, Zvi Hirsh Citron, M. Finger, I. Shein, A. Taranenko, K. Sedgwick, Mihael Makek, H. Yamamoto, H. Yu, Animesh Datta, T. Sumita, C. Y. Chi, Yasutada Akiba, A. Enokizono, H. Masuda, Kensuke Homma, M. Kurosawa, D. Lynch, A. Taketani, Y. Watanabe, V. Pantuev, R. Belmont, B. Sahlmueller, K. Boyle, V. R. Loggins, J. T. Mitchell, N. Hotvedt, R. Seidl, Vladislav Manko, M. Slunečka, P. Yin, A. Timilsina, K. Lovasz, H. Nakagomi, T. Hoshino, D. Richford, A. S. Safonov, Yoshifumi Ueda, J. H. Do, C. L. Towell, N. Vukman, Dmitry Blau, Tatsuya Chujo, Jen-Chieh Peng, E. J. Desmond, J. G. Rubin, J. E. Frantz, D. Reynolds, Xiong Wang, Balazs Ujvari, M. Wysocki, I. E. Yushmanov, Alexei Khanzadeev, J. B. Choi, Dipak Kumar Mishra, T. V. Moukhanova, Min-Hye Kim, S. H. Lee, J. Murata, S. Suzuki, Mirta Dumancic, B. Komkov, V. Babintsev, Byung-Sik Hong, Chong Kim, A. Bazilevsky, Alexandre Lebedev, G. Mitsuka, X. Jiang, J. Hanks, and Hiroyuki Sako

Subjects
Physics, 010308 nuclear & particles physics, media_common.quotation_subject, Hadron, Quark model, Elliptic flow, General Physics and Astronomy, Collision, 01 natural sciences, Asymmetry, Nuclear physics, Pseudorapidity, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Multiplicity (chemistry), Nuclear Experiment, 010306 general physics, media_common
Abstract

Asymmetric nuclear collisions of p+Al, p+Au, d+Au, and ^{3}He+Au at sqrt[s_{NN}]=200 GeV provide an excellent laboratory for understanding particle production, as well as exploring interactions among these particles after their initial creation in the collision. We present measurements of charged hadron production dN_{ch}/dη in all such collision systems over a broad pseudorapidity range and as a function of collision multiplicity. A simple wounded quark model is remarkably successful at describing the full data set. We also measure the elliptic flow v_{2} over a similarly broad pseudorapidity range. These measurements provide key constraints on models of particle emission and their translation into flow.

Published
2018

28. Single-spin asymmetry ofJ/ψproduction inp+p,p+Al, andp+Aucollisions with transversely polarized proton beams atsNN=200 GeV

Author

L. Zou, M. I. Nagy, J. H. Kang, J. S. Haggerty, Minghui Liu, D. Kapukchyan, M. Finger, Y. Riabov, J. Bryslawskyj, Kenta Shigaki, R. Cervantes, A. Enokizono, Kiyoshi Tanida, Y. L. Yamaguchi, C. Xu, Kenneth Francis Read, D. V. Perepelitsa, Y. J. Kwon, J. E. Frantz, G. D. N. Perera, D. Reynolds, Xiong Wang, A. V. Kazantsev, A. S. Nyanin, Rachid Nouicer, A. N. Zelenski, E. Kistenev, A. Sexton, John Hill, Toru Sugitate, S. P. Sorensen, J. G. Lajoie, M. Alfred, T. Hachiya, Michael William Phipps, S. Lee, Jennifer E. Perry, A. Durum, A. Deshpande, H. Yamamoto, S. Karthas, D. Kotov, M. S. Daugherity, C. P. Singh, A. Sen, Y. Fukuda, I. Tserruya, M. Jezghani, G. David, V. Singh, A. Hodges, Jong-Min Park, Taku Gunji, V. S. Pantuev, M. Sarsour, A. Iordanova, Martin Purschke, C. A. Aidala, S. Y. Han, T. Koblesky, D. E. Fields, Min-Hye Kim, T. Majoros, S. H. Lee, J. Sun, B. V. Jacak, R. Petti, E. J. Mannel, T. Rinn, R. Seto, Y. Watanabe, D. S. Jumper, M. Csanad, S. P. Stoll, N. A. Lewis, M. Grosse Perdekamp, G. Mitsuka, Takafumi Niida, J. Huang, Prakhar Garg, Keiji Nagai, T. W. Danley, A. Sukhanov, K. Kurita, Maya Hachiya Shimomura, R. S. Hollis, P. V. Radzevich, J. Sziklai, M. Snowball, M. Patel, Z. Rowan, M. Mendoza, T. Murakami, C. Pinkenburg, P. L. McGaughey, Eunja Kim, I. J. Choi, Y. I. Makdisi, T. Hoshino, D. McGlinchey, M. J. Skoby, K. Dehmelt, D. Richford, A. S. Safonov, H. En'yo, M. Slunecka, R. Belmont, G. Tarnai, M. J. Leitch, Alexander Milov, I. Nakagawa, H. Ge, N. Cronin, K. Nakano, Yoshifumi Ueda, J. H. Do, C. L. Towell, N. Vukman, Alexei Khanzadeev, Z. Sun, D. Jouan, D. Kawall, K. A. Drees, S. I. Morrow, W. E. Sondheim, J. B. Choi, M. Boer, Sándor Lökös, Dipak Kumar Mishra, D. E. Mihalik, V. Andrieux, S. Park, J. Murata, D. P. Morrison, V. Khachatryan, S. Tarafdar, T. Shioya, M. J. Tannenbaum, K. N. Barish, N. Novitzky, A. Franz, J. Runchey, M. Tomášek, C. L. Woody, A. Berdnikov, Zvi Hirsh Citron, K. Lovasz, D. Sharma, R. P. Pisani, B. K. Schmoll, I. Shein, N. Apadula, Senta Greene, J. Klatsky, A. Drees, M. Virius, S. D. Rolnick, Prashant Shukla, K. Sedgwick, C. L. Silva, B. Azmoun, Dmitry Blau, S. Zharko, Anne Marie Sickles, Jaehyeok Yoo, R. S. Towell, Mihael Makek, W. Peng, P. W. Stankus, S. F. Pate, M. McCumber, Petr Gallus, B. Schaefer, E. J. Desmond, J. S. Bok, B. Fadem, E. O'Brien, S. Bathe, M. Chiu, R. A. Soltz, T. Nagashima, K. Ozawa, C. A. Ogilvie, T. Novák, Alice Mignerey, T. K. Hemmick, Balazs Ujvari, I. V. Sourikova, D. Ivanishchev, V. Papavassiliou, S. Miyasaka, C. E. Perezlara, I. E. Yushmanov, H. Yu, T. Sumita, J. D. Osborn, Inseok Yoon, C. Y. Chi, P. Kline, Qiao Xu, A. Dion, K. DeBlasio, Kei Nagashima, V. Canoa Roman, Takao Sakaguchi, Kenichi Imai, T. O. S. Haseler, F. Giordano, M. L. Brooks, Raphael Noel Tieulent, Susumu Sato, A. D. Frawley, H. Asano, S. H. Lim, M. Beaumier, S. Huang, A. Yanovich, J. D. Orjuela Koop, T. A. Shibata, H. F. Hamilton, Hideki Hamagaki, W. Fan, K. I. Hahn, X. He, David Olle Rickard Silvermyr, S. Esumi, Z. Ji, D. Yu Peressounko, P. Montuenga, D. Isenhower, T. Moon, N. Grau, Motoi Inaba, D. Lynch, C. Gal, Julia Velkovska, V. R. Loggins, J. T. Mitchell, M. Rosati, N. Hotvedt, R. Seidl, Vladislav Manko, S. Kudo, A. Timilsina, Kensuke Homma, Y. Goto, S. Campbell, Hari Guragain, N. Feege, B. M. Johnson, A. Taranenko, Brajesh K. Singh, G. J. Ottino, X. Jiang, Xiao-yan Li, J. Hanks, Hiroyuki Sako, Byung-Sik Hong, Chong Kim, A. Bazilevsky, Alexandre Lebedev, A. Bagoly, V. Babintsev, N. S. Bandara, Vladimir Samsonov, Christine Nattrass, T. Todoroki, Tamas Ferenc Csorgo, S. Hasegawa, J. L. Nagle, V. Bumazhnov, Serpil Yalcin, C. P. Wong, M. Connors, W. A. Zajc, L. Xue, A. Denisov, Sergey Fokin, D. Dixit, Viktor Riabov, Y. H. Leung, S. Mizuno, H. W. Van Hecke, Agneta Oskarsson, D. Kincses, John Matthew Durham, Y. Berdnikov, Y. Akiba, C. McKinney, Vaclav Vrba, and K. Hill

Subjects
Physics, Proton, 010308 nuclear & particles physics, media_common.quotation_subject, 01 natural sciences, Asymmetry, Gluon, Nuclear physics, Momentum, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Nucleon, Relativistic Heavy Ion Collider, Spin-½, media_common
Abstract

We report the transverse single-spin asymmetries of J/ψ production at forward and backward rapidity, 1.2

Published
2018

29. Lévy-stable two-pion Bose-Einstein correlations in sNN=200 GeV Au+Au collisions

Author

I. Ravinovich, R. A. Soltz, H. Nakagomi, T. Hoshino, Aaron Angerami, B. Komkov, C. L. Silva, R. S. Towell, M. Bai, I. Tserruya, A. Ster, N. Feege, I. Garishvili, F. Wei, P. L. McGaughey, A. Bagoly, E. C. Aschenauer, J. M. Durham, W. A. Zajc, Norio Saito, Tsutomu Mibe, M. A. L. Leite, V. Singh, A. Hodges, Yoshifumi Ueda, J. H. Do, K. S. Joo, A. Taranenko, V. Baublis, A. Denisov, Yuki Watanabe, V. Cianciolo, D. K. Mishra, S. Bathe, C. L. Towell, Susumu Sato, G. Tarnai, M. E. Connors, T. Horaguchi, S. K. Park, T. Koblesky, M. Sarsour, S. Wolin, S. H. Lim, A. V. Kazantsev, M. Gonin, Sergey Fokin, S. Tarafdar, N. Apadula, H. Asano, J. D. Osborn, Eva Haslum, G. Kasza, Mate Csanad, M. Boer, Zhiying You, Animesh Datta, A. Glenn, P. V. Radzevich, L. Tomášek, B. Love, H. Masuda, A. Vossen, A. Sukhanov, K. Kurita, Zirui Wang, A. Lebedev, Prashant Shukla, J. S. Kapustinsky, Eunja Kim, V. Babintsev, Byoungchoo Park, Kensuke Homma, C. Y. Chi, S. F. Pate, C. Xu, Ke. Nakamura, Alexander Milov, Y. Fukuda, E. Richardson, M. Proissl, R. Petti, Keiji Nagai, C. O. Kim, A. Takeda, Y. Watanabe, Maya Hachiya Shimomura, A. Drees, D. Richford, S. Taneja, Z. Ji, I. Nakagawa, Young-Ki Kim, T. Engelmore, N. Novitzky, L. Patel, Atsushi Takahara, O. Drapier, M. Tomášek, G. S. Kyle, M. Grosse Perdekamp, G. Mitsuka, J. E. Frantz, S. Esumi, D. Winter, D. Yu Peressounko, R. Pak, M. Nihashi, K. Karatsu, Dennis Perepelitsa, A. Sexton, D. Sharma, Jongmin Lee, S. Kaneti, S. P. Sorensen, H. A. Gustafsson, T. C. Awes, Kyoichiro Ozawa, M. I. Nagy, E. R. Kinney, D. P. Morrison, S. Campbell, K. A. Drees, B. H. Kang, S. Motschwiller, R. Belmont, S. Yokkaichi, D. Kawall, K. Tanida, J. Rak, C. P. Singh, B. Bassalleck, D. Ivanishchev, H. Pei, Byung-Sik Hong, A. Bazilevsky, B. M. Johnson, Y. J. Kwon, Vardan Khachatryan, Y. Hori, Anne Marie Sickles, H. Themann, R. Seto, T. W. Danley, Y. I. Makdisi, D. Watanabe, O. Chvala, S. R. P. Mohapatra, K. Gainey, S. Karthas, H. Al-Ta'Ani, Tatsuya Chujo, D. Kotov, V. Papavassiliou, E. Vznuzdaev, J. Klatsky, B. Fadem, C. E. Perezlara, Yu. Efremenko, Zvi Hirsh Citron, Filip Krizek, N. A. Lewis, B. Azmoun, A. Král, R. P. Pisani, H. W. Yu, V. Jorjadze, O. Dietzsch, A. Enokizono, J. S. Bok, L. Zou, Sándor Lökös, K. N. Barish, Gerd Joachim Kunde, J. G. Lajoie, M. Alfred, T. Hachiya, M. Ouchida, J. H. Kang, Y. Miyachi, J. B. Choi, K. Dehmelt, E. T. Atomssa, Jen-Chieh Peng, Jason Kamin, I. Shein, S. Zharko, D. Reynolds, D. M. Lee, J. S. Haggerty, S. R. Lee, J. Sziklai, S. Baumgart, M. J. Skoby, Hiromi Iinuma, W. Metzger, B. Meredith, Inkyu Park, Xiong Wang, Dong Jo Kim, R. S. Hollis, C. Gal, Y. Fukao, Julia Velkovska, Viktor Riabov, K. Sedgwick, J. Huang, Bum-Hoon Lee, T. Hester, Minghui Liu, S. P. Stoll, A. Veicht, Jessy J. Alexander, K. V. Dharmawardane, Brian Cole, M. Kurosawa, J. H. Yoo, M. Slunecka, M. Patel, X. Jiang, Timothy Thomas Rinn, H. J. Kim, M. Rosati, Kenneth Francis Read, T. Ichihara, Tamás Csörgő, Prakhar Garg, M. Wysocki, B. Bannier, K. O. Eyser, P. Kline, K. S. Lee, A. Dion, B. Lewis, Senta Greene, M. L. Brooks, J. S. Kang, X. He, Y. H. Leung, H. Pereira, K. B. Lee, C. L. Woody, A. Berdnikov, L. Ding, N. N. Ajitanand, A. Taketani, D. S. Jumper, D. Roach, K. M. Kijima, D. Jouan, Y. Aramaki, M. J. Tannenbaum, B. K. Schmoll, S. Kudo, T. Murakami, E. M. Takagui, E. Tennant, E. O'Brien, Robert Vertesi, Y. S. Lai, A. Pun, H. Van Hecke, R. Lacey, J. Bryslawskyj, V. S. Pantuev, S. Dairaku, R. Granier de Cassagnac, N. Grau, M. Sano, Beomkyu Kim, J. Koster, A. Adare, K. Hashimoto, M. Leitgab, Xingguo Li, C. A. Ogilvie, G. D. N. Perera, Y. Ikeda, M. S. Daugherity, Shuo Han, Y. L. Yamaguchi, Charles Maguire, Jiangyong Jia, Y. Goto, Alice Mignerey, T. K. Hemmick, Bhawani Singh, Y. Komatsu, L. D'Orazio, S. Miyasaka, Takahiro Nakamura, Yasuo Miake, Petr Gallus, Martin Purschke, Shoichi Hasegawa, A. Deshpande, D. E. Mihalik, Motoi Inaba, J. C. Hill, S. I. Morrow, A. Mwai, R. Akimoto, Kimberly Hill, S. Choi, S. Sawada, C. A. Aidala, J. Ying, A. Franz, J. Runchey, H. A. Torii, B. Kurgyis, Takao Sakaguchi, A. Sen, K. DeBlasio, A. Garishvili, C. Pinkenburg, I. V. Sourikova, D. Kleinjan, M. Issah, A. D. Frawley, K. S. Sim, K. Okada, D. Kotchetkov, Toru Sugitate, E. Kistenev, S. Vazquez-Carson, M. Stepanov, G. Roche, J. Sun, B. Sahlmueller, Don McGlinchey, R. Yang, M. J. Leitch, I. J. Choi, B. Xia, Ryugo S. Hayano, M. Finger, Y. Riabov, Marisilvia Donadelli, Kenta Shigaki, R. K. Choudhury, V. Bumazhnov, A. Durum, J. D. Orjuela Koop, H. Sako, A. S. Nyanin, Rachid Nouicer, Agneta Oskarsson, Kei Nagashima, Y. Tanaka, C. H. Chen, A. N. Zelenski, E. Mannel, D. Kincses, V. Canoa Roman, Y. Berdnikov, S. H. Lee, Y. Akiba, M. Javani, C. McKinney, S. Nagamiya, A. Manion, Vaclav Vrba, Rui Wei, H. J. Moon, A. Kiss, Henner Buesching, Steve Edwards, X. Gong, D. E. Fields, L. A. Linden Levy, J. Imrek, François Fleuret, M. McCumber, T. O. S. Haseler, Raphael Noel Tieulent, Takahiro Fusayasu, H. Qu, Qiao Xu, D. Silvermyr, A. Yanovich, Z. Rowan, Tomoya Tsuji, M. Mendoza, S. N. White, Barbara Jacak, Moonhee Kim, H. Ge, K. Nakano, K. B. Kim, W. E. Sondheim, Vladimir Samsonov, Christine Nattrass, K. Boyle, Hideki Hamagaki, W. Fan, K. Aoki, M. Vargyas, Tomofumi Nagae, J. L. Nagle, G. David, T. Todoroki, P. Castera, M. Chiu, Ajit Kumar Mohanty, K. I. Hahn, T. A. Shibata, D. Isenhower, Tamas Novak, T. Moon, I. Younus, Jong-Min Park, Taku Gunji, Peter Christiansen, S. Butsyk, Koji Sato, T. Kempel, M. Virius, S. D. Rolnick, K. Watanabe, K. Shoji, Yongsun Kim, W. Peng, P. W. Stankus, J. T. Mitchell, N. Hotvedt, R. Seidl, Vladislav Manko, Mihael Makek, P. Yin, C. Vale, A. Timilsina, Y. Nakamiya, D. Lynch, Min-Hye Kim, A. Iordanova, J. Murata, Dmitry Blau, E. J. Desmond, J. Hanks, E. Vazquez-Zambrano, A. Nederlof, M. Kasai, Y. Tsuchimoto, Balazs Ujvari, I. E. Yushmanov, L. Guo, Alexei Khanzadeev, Shinichi Masumoto, E. Stenlund, S. Huang, and T. V. Moukhanova

Subjects
Length scale, Physics, Particle physics, 010308 nuclear & particles physics, Bose–Einstein correlations, 01 natural sciences, Nuclear physics, Pion, Critical point (thermodynamics), 0103 physical sciences, Quark–gluon plasma, Transverse mass, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Scaling
Abstract

We present a detailed measurement of charged two- pion correlation functions in 0–30% centrality sNN=200 GeV Au+Au collisions by the PHENIX experiment at the Relativistic Heavy Ion Collider. The data are well described by Bose- Einstein correlation functions stemming from Levy-stable source distributions. Using a fine transverse momentum binning, we extract the correlation strength parameter λ, the Levy index of stability α, and the Levy length scale parameter R as a function of average transverse mass of the pair mT. We find that the positively and the negatively charged pion pairs yield consistent results, and their correlation functions are represented, within uncertainties, by the same Levy-stable source functions. The λ(mT) measurements indicate a decrease of the strength of the correlations at low mT. The Levy length scale parameter R(mT) decreases with increasing mT, following a hydrodynamically predicted type of scaling behavior. The values of the Levy index of stability α are found to be significantly lower than the Gaussian case of α=2, but also significantly larger than the conjectured value that may characterize the critical point of a second-order quark-hadron phase transition.

Published
2018

30. Measurements of Multiparticle Correlations in d+Au Collisions at 200, 62.4, 39, and 19.6 GeV and p+Au Collisions at 200 GeV and Implications for Collective Behavior

Author

Y. I. Makdisi, A. V. Kazantsev, N. Feege, B. M. Johnson, M. Boer, V. Bumazhnov, I. Tserruya, M. Jezghani, Sándor Lökös, M. J. Tannenbaum, K. N. Barish, V. Singh, A. Hodges, D. Lynch, S. Zharko, B. K. Schmoll, T. Murakami, A. Taranenko, Jaehyeok Yoo, T. Koblesky, S. P. Stoll, A. Sen, Mikhail Malaev, T. Hachiya, Y. Fukuda, A. Takeda, G. J. Ottino, G. David, A. Bagoly, S. Hasegawa, K. L. Smith, E. J. Desmond, C. Gal, Julia Velkovska, Senta Greene, Alice Mignerey, Kyoichiro Ozawa, P. V. Radzevich, S. Miyasaka, A. Franz, D. E. Fields, M. L. Brooks, S. I. Morrow, M. Sarsour, Eunja Kim, C. Ayuso, Mate Csanad, A. Iordanova, S. Y. Han, M. Finger, Takao Sakaguchi, J. Runchey, V. R. Loggins, J. T. Mitchell, S. P. Sorensen, Hari Guragain, B. V. Jacak, V. Babintsev, C. L. Silva, N. Hotvedt, J. E. Frantz, Shih-Chang Lee, Y. Riabov, J. Bryslawskyj, B. Fadem, E. O'Brien, B. Azmoun, Kenta Shigaki, R. Cervantes, H. En'yo, X. He, N. S. Bandara, D. Reynolds, A. D. Frawley, Vladislav Manko, Xiong Wang, D. J. Kim, M. J. Leitch, Byung-Sik Hong, R. A. Soltz, A. S. Nyanin, Vladimir Samsonov, Christine Nattrass, S. Huang, Wesley James Metzger, P. Yin, Chong Kim, A. Bazilevsky, T. Todoroki, Y. Watanabe, Viktor Riabov, T. Novák, Rachid Nouicer, A. N. Zelenski, N. Novitzky, P. L. McGaughey, E. O. Lallow, M. I. Nagy, F. Giordano, M. Alfred, Michael William Phipps, Kenichi Imai, H. F. Hamilton, Alexandre Lebedev, Kei Nagashima, R. P. Pisani, Z. Wang, Serpil Yalcin, Takafumi Niida, J. Huang, A. Timilsina, I. Nakagawa, A. Berdnikov, Jennifer E. Perry, T. O. S. Haseler, C. L. Woody, D. Dixit, V. Canoa Roman, Alexander Milov, M. McCumber, S. Esumi, J. Imrek, C. P. Wong, L. D. Liu, Y. J. Kwon, M. Connors, Raphael Noel Tieulent, D. Kapukchyan, T. Majoros, W. A. Zajc, David Olle Rickard Silvermyr, L. Xue, A. Enokizono, L. Zou, Y. L. Yamaguchi, H. Masuda, Kensuke Homma, Prakhar Garg, J. L. Nagle, Petr Gallus, Susumu Sato, H. Asano, A. Denisov, C. Xu, Z. Ji, D. P. Morrison, E. Kistenev, D. Yu Peressounko, T. Nagashima, R. S. Towell, B. Ujvari, Minghui Liu, Prashant Shukla, Hideki Hamagaki, W. Fan, N. Apadula, I. V. Sourikova, T. A. Shibata, S. F. Pate, K. I. Hahn, Sergey Fokin, X. Jiang, A. Sexton, P. Kline, G. D. N. Perera, A. Pun, Kenneth Francis Read, J. Sun, A. Dion, D. Isenhower, T. Elder, T. Moon, D. V. Perepelitsa, A. Drees, Keiji Nagai, R. Seto, T. W. Danley, S. Syed, D. McGlinchey, D. Ivanishchev, Radek Novotny, Jong-Min Park, Taku Gunji, M. Patel, P. Montuenga, Y. H. Leung, S. Mizuno, Qiao Xu, N. Grau, Xiao-yan Li, V. Papavassiliou, J. Hanks, Hiroyuki Sako, C. E. Perezlara, H. W. Van Hecke, Koji Sato, D. E. Mihalik, A. Sukhanov, K. Kurita, Motoi Inaba, C. Butler, D. Sharma, M. Virius, S. D. Rolnick, S. Bathe, A. Durum, N. Cronin, M. Snowball, Martin Purschke, C. A. Aidala, M. Chiu, M. Tomášek, T. Shioya, W. Peng, P. W. Stankus, Agneta Oskarsson, C. A. Ogilvie, I. J. Choi, D. Kincses, John Matthew Durham, M. J. Skoby, Y. Ito, Y. Berdnikov, T. K. Hemmick, C. McKinney, Anne Marie Sickles, B. Schaefer, Vaclav Vrba, K. Hill, V. Andrieux, J. S. Bok, V. Khachatryan, M. Beaumier, K. DeBlasio, S. Vazquez-Carson, S. Karthas, D. Kotov, S. H. Lim, D. S. Jumper, Y. Goto, K. Aoki, J. D. Osborn, A. Yanovich, D. Jouan, Inseok Yoon, J. D. Orjuela Koop, John Hill, Toru Sugitate, D. Kawall, M. Grosse Perdekamp, G. Mitsuka, H. Yu, T. Sumita, C. Y. Chi, Yasutada Akiba, S. Park, J. Murata, M. Slunecka, R. Belmont, R. Seidl, I. Shein, K. Tanida, K. Sedgwick, Z. Rowan, M. Mendoza, M. S. Daugherity, Mihael Makek, A. Deshpande, H. Yamamoto, J. G. Lajoie, C. P. Singh, R. Petti, N. A. Lewis, V. Jorjadze, Moonhee Kim, K. Lovasz, J. Sziklai, Zvi Hirsh Citron, H. Ge, V. Pantuev, K. Nakano, W. E. Sondheim, H. Nakagomi, T. Hoshino, D. Richford, A. S. Safonov, Yoshifumi Ueda, J. H. Do, C. L. Towell, N. Vukman, M. Rosati, Tamás Csörgő, S. Kudo, S. Campbell, K. A. Drees, E. J. Mannel, T. Rinn, C. Pinkenburg, J. Klatsky, K. Dehmelt, J. H. Kang, J. S. Haggerty, G. Tarnai, S. Tarafdar, Alexei Khanzadeev, J. B. Choi, Dipak Kumar Mishra, Bhartendu K. Singh, Dmitry Blau, I. E. Yushmanov, Min-Hye Kim, S. H. Lee, Mirta Dumancic, Maya Hachiya Shimomura, and R. S. Hollis

Subjects
Physics, Large Hadron Collider, 010308 nuclear & particles physics, General Physics and Astronomy, 01 natural sciences, Nuclear physics, Momentum, Deuterium, Quantum mechanics, 0103 physical sciences, Quark–gluon plasma, Rapidity, Nuclear Experiment, 010306 general physics, Anisotropy, Glauber, Sign (mathematics)
Abstract

Recently, multiparticle-correlation measurements of relativistic p/d/He3+Au, p+Pb, and even p+p collisions show surprising collective signatures. Here, we present beam-energy-scan measurements of two-, four-, and six-particle angular correlations in d+Au collisions at sNN=200, 62.4, 39, and 19.6 GeV. We also present measurements of two- and four-particle angular correlations in p+Au collisions at sNN=200 GeV. We find the four-particle cumulant to be real valued for d+Au collisions at all four energies. We also find that the four-particle cumulant in p+Au has the opposite sign as that in d+Au. Further, we find that the six-particle cumulant agrees with the four-particle cumulant in d+Au collisions at 200 GeV, indicating that nonflow effects are subdominant. These observations provide strong evidence that the correlations originate from the initial geometric configuration, which is then translated into the momentum distribution for all particles, commonly referred to as collectivity. © 2018 American Physical Society. (Less)

Published
2018

31. Nuclear Dependence of the Transverse-Single-Spin Asymmetry for Forward Neutron Production in Polarized p+A Collisions at sNN=200 GeV

Author

K. Lovasz, Y. J. Kwon, H. Nakagomi, T. Hoshino, D. Richford, A. S. Safonov, Z. Rowan, M. Mendoza, Alexander Milov, Senta Greene, Yoshifumi Ueda, J. H. Do, C. L. Towell, C. Ayuso, N. Vukman, A. Takeda, B. Fadem, E. O'Brien, R. A. Soltz, E. O. Lallow, F. Giordano, D. P. Morrison, David Olle Rickard Silvermyr, X. Jiang, Z. Ji, Y. Watanabe, D. Yu Peressounko, A. Sukhanov, K. Kurita, M. Rosati, Hari Guragain, Takafumi Niida, J. Huang, D. Kawall, A. Sen, Tamás Csörgő, M. Finger, Maya Hachiya Shimomura, R. S. Hollis, J. E. Frantz, Y. Riabov, C. L. Silva, Prakhar Garg, S. Park, J. Murata, S. Kudo, J. Bryslawskyj, D. Reynolds, A. V. Kazantsev, Kenta Shigaki, R. Cervantes, D. E. Fields, Y. I. Makdisi, J. D. Osborn, Inseok Yoon, B. V. Jacak, Viktor Riabov, Xiong Wang, I. Shein, A. S. Nyanin, K. A. Drees, K. Tanida, K. Sedgwick, V. Bumazhnov, Xiao-yan Li, Rachid Nouicer, A. N. Zelenski, J. H. Kang, Prashant Shukla, Dmitry Blau, M. Boer, I. Tserruya, J. S. Haggerty, Mihael Makek, A. Deshpande, J. Hanks, H. Yamamoto, Hiroyuki Sako, T. Novák, N. Feege, M. Jezghani, S. Campbell, S. F. Pate, Sándor Lökös, C. L. Woody, A. Berdnikov, Radek Novotny, A. Pun, M. S. Daugherity, V. Singh, H. En'yo, M. J. Leitch, B. Azmoun, K. N. Barish, M. J. Tannenbaum, Y. H. Leung, B. M. Johnson, T. Koblesky, J. Klatsky, C. P. Singh, K. L. Smith, E. J. Desmond, S. Syed, J. D. Orjuela Koop, Y. Fukuda, S. Zharko, R. Petti, N. A. Lewis, A. Bagoly, D. Ivanishchev, Kenichi Imai, D. V. Perepelitsa, V. Papavassiliou, V. Pantuev, Petr Gallus, T. O. S. Haseler, T. Hachiya, T. Nagashima, C. E. Perezlara, T. Murakami, P. V. Radzevich, G. David, A. Taranenko, Serpil Yalcin, E. J. Mannel, T. Rinn, I. Nakagawa, A. Enokizono, B. K. Schmoll, Jaehyeok Yoo, G. D. N. Perera, P. Kline, A. Dion, S. Esumi, I. V. Sourikova, V. Jorjadze, Mikhail Malaev, E. Kistenev, Brajesh K. Singh, G. J. Ottino, Kyoichiro Ozawa, Eunja Kim, C. P. Wong, L. D. Liu, Keiji Nagai, Alice Mignerey, J. Sziklai, S. I. Morrow, Hideki Hamagaki, W. Fan, M. Connors, C. Pinkenburg, S. P. Sorensen, S. Miyasaka, K. I. Hahn, A. Franz, M. Beaumier, J. Runchey, W. A. Zajc, L. Xue, C. Gal, K. Dehmelt, M. L. Brooks, V. Babintsev, A. Durum, Balazs Ujvari, P. L. McGaughey, Takao Sakaguchi, Julia Velkovska, A. Denisov, N. Cronin, G. Tarnai, Y. L. Yamaguchi, A. D. Frawley, Sergey Fokin, I. E. Yushmanov, C. Xu, M. Tomášek, W. Peng, S. Tarafdar, J. G. Lajoie, S. Huang, M. Alfred, Michael William Phipps, M. Slunecka, R. Belmont, D. E. Mihalik, P. W. Stankus, R. Seidl, L. Zou, N. S. Bandara, Wesley James Metzger, M. Snowball, C. Butler, Martin Purschke, Byung-Sik Hong, Chong Kim, A. Bazilevsky, Minghui Liu, C. A. Aidala, D. Sharma, J. Sun, Jennifer E. Perry, H. F. Hamilton, A. Sexton, Alexei Khanzadeev, I. J. Choi, M. J. Skoby, Y. Ito, Kenneth Francis Read, Alexandre Lebedev, R. Seto, Vladimir Samsonov, T. Shioya, Christine Nattrass, P. Montuenga, T. W. Danley, V. Andrieux, V. Khachatryan, Anne Marie Sickles, N. Grau, B. Schaefer, J. S. Bok, Koji Sato, J. B. Choi, X. He, R. S. Towell, M. I. Nagy, T. Todoroki, Dipak Kumar Mishra, Shih-Chang Lee, D. Kapukchyan, D. McGlinchey, H. Yu, T. Sumita, C. Y. Chi, Yasutada Akiba, T. Majoros, Min-Hye Kim, J. L. Nagle, Mirta Dumancic, T. A. Shibata, D. Isenhower, T. Moon, M. Sarsour, A. Iordanova, S. Y. Han, H. Masuda, Kensuke Homma, D. J. Kim, N. Novitzky, R. P. Pisani, M. McCumber, V. R. Loggins, J. T. Mitchell, Kei Nagashima, Motoi Inaba, V. Canoa Roman, N. Hotvedt, J. Imrek, Vladislav Manko, Raphael Noel Tieulent, Susumu Sato, H. Asano, P. Yin, Jong-Min Park, Taku Gunji, A. Timilsina, M. Patel, D. Lynch, S. Hasegawa, M. Virius, S. D. Rolnick, D. Dixit, Agneta Oskarsson, D. Kincses, John Matthew Durham, Y. Berdnikov, C. McKinney, Vaclav Vrba, K. Hill, S. Bathe, M. Chiu, C. A. Ogilvie, T. K. Hemmick, K. DeBlasio, S. Vazquez-Carson, S. Karthas, D. Kotov, D. S. Jumper, M. Csanad, S. Mizuno, S. P. Stoll, Y. Goto, K. Aoki, H. W. Van Hecke, D. Jouan, N. Apadula, A. Drees, Moonhee Kim, Zvi Hirsh Citron, H. Ge, K. Nakano, W. E. Sondheim, Z. Wang, T. Elder, Qiao Xu, S. H. Lim, A. Yanovich, John Hill, Toru Sugitate, M. Grosse Perdekamp, and G. Mitsuka

Subjects
Physics, Particle physics, Large Hadron Collider, 010308 nuclear & particles physics, Scattering, media_common.quotation_subject, General Physics and Astronomy, Absolute value, 01 natural sciences, Asymmetry, Spectral line, Nuclear physics, 0103 physical sciences, Neutron, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Spin-½, media_common
Abstract

During 2015, the Relativistic Heavy Ion Collider (RHIC) provided collisions of transversely polarized protons with Au and Al nuclei for the first time, enabling the exploration of transverse-single-spin asymmetries with heavy nuclei. Large single-spin asymmetries in very forward neutron production have been previously observed in transversely polarized p+p collisions at RHIC, and the existing theoretical framework that was successful in describing the single-spin asymmetry in p+p collisions predicts only a moderate atomic-mass-number (A) dependence. In contrast, the asymmetries observed at RHIC in p+A collisions showed a surprisingly strong A dependence in inclusive forward neutron production. The observed asymmetry in p+Al collisions is much smaller, while the asymmetry in p+Au collisions is a factor of 3 larger in absolute value and of opposite sign. The interplay of different neutron production mechanisms is discussed as a possible explanation of the observed A dependence.

Published
2018

32. Microwave-Assisted Synthesis of Dendritic Viologen-Arranged Molecules with an ω-Mercaptoalkyl Group and Their Self-Assembled Monolayers Complexed with Various Anions

Author

Keiji Nagai, Tomokazu Iyoda, Jun Sawayama, Takehiro Kawauchi, and Yuki Oguchi

Subjects
Aqueous solution, Polymers and Plastics, Chemistry, Organic Chemistry, Inorganic chemistry, Viologen, Self-assembled monolayer, Inorganic Chemistry, Metal, chemistry.chemical_compound, X-ray photoelectron spectroscopy, visual_art, Monolayer, Polymer chemistry, Materials Chemistry, visual_art.visual_art_medium, medicine, Molecule, Acetonitrile, medicine.drug
Abstract

We report unique self-assembled monolayers (SAMs) consisting of dendritic viologen-arranged molecules with an ω-mercaptodecyl group (An, n (dendritic generation) = 0–3) at the apex of the dendritic structure, which can accommodate a specific amount of metal anionic complexes defined by the dendritic structure. Dendritic molecules from several generations were successfully synthesized via microwave heating, thus providing easy access to third-generation molecules without requiring protection/deprotection processes during generation growth. SAMs of the dendritic molecules were fabricated by soaking gold substrates in solutions of the molecules in an acetonitrile/ethanol mixture at room temperature. Counter anions of the viologen units in the SAMs could be exchanged easily for various metal anionic complexes, such as PtCl42–, CuCl42–, and PdCl42–, by immersing the SAMs in aqueous solutions of the ions. X-ray photoelectron spectroscopy of the SAMs revealed that the amount of the metal anionic complexes accomm...

Published
2015

33. Efficient p-zinc phthalocyanine/n-fullerene organic bilayer electrode for molecular hydrogen evolution induced by the full visible-light energy

Author

Katsuma Fukui, Toshiyuki Abe, Keiji Nagai, Yudai Hiyama, and Kana Sahashi

Subjects
Photocurrent, Materials science, Fullerene, Renewable Energy, Sustainability and the Environment, Bilayer, Energy Engineering and Power Technology, Condensed Matter Physics, Photochemistry, Catalysis, Organic semiconductor, chemistry.chemical_compound, Fuel Technology, chemistry, Electrode, Phthalocyanine, Visible spectrum
Abstract

A photoelectrode featuring an organic p/n bilayer was used to generate H2 from H+, where n-type fullerene (C60) was used in combination with p-type zinc phthalocyanine (ZnPc). When a Pt catalyst was loaded on the surface of C60 in the organo-photoelectrode, a photocathodic current was successfully generated via H2 evolution at the Pt-coated C60 surface. On the basis of the results of action spectral measurements for photocurrent, the H2 evolution appeared to be induced over the entire visible-light wavelength range of

Published
2015

34. Efficient organo-photocatalysis system of an n-type perylene derivative/p-type cobalt phthalocyanine bilayer for the production of molecular hydrogen from hydrazine

Author

Keiji Nagai, Naohiro Taira, Toshiyuki Abe, and Yoshinori Tanno

Subjects
Chemical substance, General Chemical Engineering, Bilayer, Inorganic chemistry, Hydrazine, General Chemistry, Photochemistry, Decomposition, chemistry.chemical_compound, chemistry, Photocatalysis, Perylene, Derivative (chemistry), Stoichiometry
Abstract

The stoichiometric decomposition of hydrazine (N2H4) into N-2 and H-2 was observed to occur efficiently in a photocatalysis system of an organic p-n bilayer. The primary feature of the present system is that the entire visible-light energy spectrum can be utilised for N2H4 decomposition. Furthermore, this paper presents the first demonstration of H-2 formation by the reducing power photogenerated at the n-type perylene derivative in an organic bilayer.

Published
2015

35. Chemically directed self-assembly of perpendicularly aligned cylinders by a liquid crystalline block copolymer

Author

Keiji Nagai, Hiroshi Yoshida, Yasuhiko Tada, Kouhei Aida, Motonori Komura, Nanae Yamashita, Satoru Watanabe, and Tomokazu Iyoda

Subjects
chemistry.chemical_classification, Materials science, Nanostructure, Doping, Nanotechnology, General Chemistry, Polymer, Epitaxy, chemistry, Chemical engineering, Etching (microfabrication), Materials Chemistry, Copolymer, Hexagonal lattice, Thin film
Abstract

Chemical epitaxy with a density multiplication process was applied to the perpendicularly oriented hexagonal cylinder nanostructure of liquid crystalline block copolymer (PEO-b-PMA(Az)) thin film through thermally induced microphase separation by using a newly designed PMA(Az)24 brush. The hexagonal lattice orientation with 1.9 tera-cylinders per inch2 was laterally controlled for long-range-ordered direct self-assembly. Furthermore, the direct pattern-transfer of the assembled structure to an Au nanodot array was demonstrated by doping of HAuCl4 selectively into the PEO cylindrical microdomains and then vacuum ultraviolet light irradiation to cause polymer etching and reduction of the Au ions.

Published
2015

36. A water splitting system using an organo-photocathode and titanium dioxide photoanode capable of bias-free H2 and O2 evolution

Author

Keiji Nagai, Hideki Kato, Katsuma Fukui, Toshiyuki Abe, and Yuto Kawai

Subjects
Materials science, Electrolysis of water, Bilayer, Metals and Alloys, Analytical chemistry, Nanotechnology, General Chemistry, Catalysis, Photocathode, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, chemistry, Titanium dioxide, Materials Chemistry, Ceramics and Composites, Water splitting, Stoichiometry, Voltage
Abstract

This study examined a water-splitting system comprising a TiO2 photoanode and an organo-photocathode consisting of a p-n bilayer. Stoichiometric decomposition of water into H-2 and O-2 successfully occurred at bias voltages lower than the theoretical value (i.e. 1.23 V). Compared to the conventional TiO2 and Pt systems, the proposed water-splitting system demonstrated water splitting without any externally applied bias.

Published
2016

37. Measurements of e+e− pairs from open heavy flavor in p+p and d+A collisions at sNN=200 GeV

Author

Martin Purschke, C. A. Aidala, T. Murakami, E. M. Takagui, D. Kawall, K. Tanida, K. A. Drees, D. Hornback, S. Afanasiev, M. Rosati, Tamás Csörgő, S. Kudo, M. J. Skoby, A. A. Vinogradov, S. Bathe, Maya Hachiya Shimomura, Jiangyong Jia, Y. Goto, S. I. Morrow, Vardan Khachatryan, Zvi Hirsh Citron, S. Sawada, K. L. Smith, A. Ster, M. I. Nagy, Gerd Joachim Kunde, N. Feege, J. Ying, A. Franz, J. Runchey, Y. Ito, Kensuke Homma, B. Meredith, J. Newby, Y. I. Makdisi, O. Dietzsch, Marcus Hohlmann, I. Shein, Y. Fukao, M. Patel, Yu. Efremenko, E. T. Atomssa, H. Valle, Dipanwita Dutta, C. Gal, Julia Velkovska, E. Vznuzdaev, Dmitry Blau, Z. Fraenkel, Carly W. Butler, S. Chernichenko, C. Silvestre, Y. Tanaka, B. Bassalleck, K. Sedgwick, H. A. Torii, Toru Sugitate, K. O. Eyser, M. Chiu, Ajit Kumar Mohanty, C. Baumann, S. Kametani, T. A. Shibata, T. Sato, Alberto Baldisseri, Mihael Makek, T. Hester, E. Mannel, J. H. Kang, Y. Onuki, D. Kapukchyan, J. Huang, M. Konno, J. S. Haggerty, M. J. Tannenbaum, Jan Rak, C. P. Singh, B. M. Johnson, R. K. Choudhury, P. Tarján, Torsten Dahms, M. Boer, M. Wysocki, E. P. Hartouni, Marisilvia Donadelli, V. Bumazhnov, B. K. Schmoll, R. Lacey, E. J. Desmond, S. P. Sorensen, R. Granier de Cassagnac, A. Taranenko, B. Azmoun, Y. J. Mao, A. Král, François Fleuret, Ryugo S. Hayano, L. Zou, Hongfang Liu, D. E. Fields, B. Love, F. Staley, L. Baksay, A. Adare, N. A. Lewis, Y. Nakamiya, D. Lynch, D. Isenhower, Tamas Novak, T. Moon, L. Mašek, V. Jorjadze, S. Batsouli, S. Rembeczki, Charles Maguire, T. Horaguchi, C. Xu, H. Pei, Radek Novotny, R. Tanabe, D. Layton, M. McCumber, C. M. Camacho, Eun Joo Kim, G. Baksay, Prashant Shukla, A. Isupov, H. Sako, Y. Watanabe, A. Rakotozafindrabe, Y. Riabov, Kenta Shigaki, A. K. Purwar, V-N. Tram, Jong-Min Park, Taku Gunji, H. Gong, F. Kajihara, L. Aphecetche, Timothy Thomas Rinn, S. F. Pate, Y. H. Leung, W. C. Chang, D. E. Mihalik, D. Richford, Y. Tsuchimoto, Balazs Ujvari, S. Tarafdar, N. Grau, A. Dion, Shuo Han, A. G. Litvinenko, Y. S. Lai, Seong H. Kim, P.L. McGaughey, T. O. S. Haseler, H. Qu, Masamichi Ishihara, Agneta Oskarsson, D. Kincses, Y. Berdnikov, J. L. Klay, Barbara Jacak, H. Iinuma, Yuhei Morino, Takahiro Fusayasu, Alexander Malakhov, T. Elder, Qiao Xu, H. Al-Bataineh, D. Silvermyr, L. S. Zolin, Motoi Inaba, J. C. Hill, J. G. Lajoie, M. Alfred, T. Hachiya, Michael William Phipps, B. Komkov, Anne Marie Sickles, H. Themann, V. R. Loggins, J. T. Mitchell, Alice Mignerey, W. J. Park, M. Mishra, Brennan Schaefer, J. Sziklai, Brian Cole, S. Nagamiya, A. Basye, A. Sexton, G. Tarnai, N. Hotvedt, R. Seidl, Vladislav Manko, R. S. Towell, P. D. Barnes, A. Yanovich, Hideki Hamagaki, W. Fan, K. Aoki, M. Nguyen, I. E. Yushmanov, Mate Csanad, G. David, A. S. Nyanin, A. Yu. Semenov, Rushan Han, J. Gosset, Alexei Khanzadeev, A. Kozlov, A. Bagoly, Vladimir Samsonov, J. S. Bok, D. Ivanishchev, Norio Saito, A. Morreale, M. A. L. Leite, K. I. Hahn, Vaclav Vrba, A. Kravitz, R. A. Soltz, Klaus Johannes Reygers, V. Papavassiliou, I. Garishvili, F. Wei, Z. Rowan, M. Naglis, H. Nakagomi, T. Hoshino, S. Butsyk, Takao Sakaguchi, A. Sen, Shoichi Hasegawa, S. N. White, C. E. Perezlara, Eva Haslum, P. Yin, R. Seto, P. Liebing, E. Stenlund, S. Huang, T. Niida, N. N. Ajitanand, Christine Nattrass, K. Haruna, Minghui Liu, Xiaomei Li, G. D. N. Perera, S. H. Lim, C. L. Silva, M. Gonin, P. Rosnet, S. Zhou, A. Lebedev, Rachid Nouicer, Christian Klein-Boesing, T. W. Danley, A. P.T. Palounek, J. M. Durham, Senta Greene, H. Ge, K. Das, K. Fujiwara, G. R. Young, Takahiro Nakamura, K. Nakano, K. Shoji, Anand Kumar Dubey, A. D. Frawley, J. S. Kapustinsky, Kenjiro Miki, Bruno Lenzi, Yoshifumi Ueda, J. H. Do, E. Kistenev, V. Babintsev, Y. L. Yamaguchi, C. L. Towell, Susumu Sato, S. D. Rolnick, W. E. Sondheim, Frank Ellinghaus, A. Sukhanov, B. Fadem, V. Dzhordzhadze, A. Hadj Henni, K. Kurita, David D'Enterria, M. Tomášek, Xuan Li, J. Alexander, C. Ayuso, Susumu Oda, K. Boyle, P. A. Rukoyatkin, H. Pereira, W. Peng, P. W. Stankus, G. S. Kyle, C. L. Woody, A. Berdnikov, J. L. Nagle, W. Holzmann, X. He, C. Vale, H. A. Gustafsson, B. S. Chang, J. L. Charvet, A. Timilsina, M. Heffner, A. Durum, Kenneth Francis Read, T. Ichihara, Byung-Sik Hong, A. Bazilevsky, R. Belmont, E. O'Brien, J. Bryslawskyj, C. Y. Chi, V. Peresedov, Robert Vertesi, Beomkyu Kim, K. S. Sim, Paul Constantin, Wei Xie, C. O. Kim, S. Yokkaichi, K. Yamaura, Yasutada Akiba, R. Pak, K. B. Lee, H. W. Yu, I. Younus, C. Zhang, Koji Sato, H. Van Hecke, A. Kiss, P. Ružička, D. M. Lee, Dae-Hyeok Kim, T. Kempel, J. Koster, T. Nagashima, Henner Buesching, R. Yang, Y. Ikeda, M. Kurosawa, K. Kiriluk, M. Grosse Perdekamp, E. O. Lallow, A. Deshpande, J. H. Yoo, J. G. Boissevain, M. E. Connors, I. V. Sourikova, H. Masui, T. Majoros, Keiji Nagai, K. Imai, Viktor Riabov, D. Roach, N. Kamihara, A. A. Bickley, K. M. Kijima, S. K. Park, Tadaaki Isobe, A. Pun, J. P. Wessels, J. Seele, C. Pinkenburg, Sándor Lökös, C. P. Wong, K. N. Barish, S. Zharko, M. Stepanov, G. Roche, L. D. Liu, Kei Nagashima, V. Canoa Roman, W. A. Zajc, M. Ouchida, N. Means, P. Chung, J. Jin, V. Baublis, A. Denisov, V. Cianciolo, J. Asai, Y. Tomita, Sergey Fokin, M. L. Brooks, F. Matathias, Z. Ji, D. Winter, D. Yu Peressounko, Dennis Perepelitsa, Shingo Sakai, Malik, M. Slunečka, I. J. Choi, J. Imrek, Raphael Noel Tieulent, Ralf Peter Averbeck, A. V. Kazantsev, L. Tomášek, A. Drees, P. Mikeš, A. Soldatov, Y. Fukuda, T. C. Awes, Kyoichiro Ozawa, T. Liška, Jun Kikuchi, C. A. Ogilvie, T. K. Hemmick, Bhawani Singh, Yasuo Miake, K. DeBlasio, L. Kochenda, M. Issah, S. Vazquez-Carson, Don McGlinchey, S. Syed, K. Sakashita, S. Karthas, D. Kotov, Jason Kamin, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, J.-G. Park, A. Churyn, D. Jouan, Alberica Toia, Y. J. Kwon, V. S. Pantuev, Kimberly Hill, K. Okada, B. Sahlmueller, H. En'yo, M. J. Leitch, M. J. Kweon, G. Mitsuka, J. E. Frantz, Herve Borel, A. Enokizono, A. Taketani, D. S. Jumper, Makoto Oka, I. Tserruya, V. L. Rykov, S. Belikov, K. S. Joo, N. Apadula, I. Ravinovich, V. Singh, R. Petti, S. Esumi, D. Sharma, T. Engelmore, R. Ichimiya, T. Koblesky, M. Bai, M. Sarsour, J. D. Osborn, Inseok Yoon, A. Glenn, P. V. Radzevich, R. Bennett, Zirui Wang, T. L.T. Thomas, M. Finger, S. Dairaku, Eunja Kim, O. Zaudtke, Christophe Pierre Suire, Alexander Milov, M. Virius, Manabu Togawa, I. Nakagawa, N. Novitzky, J. D. Orjuela Koop, D. Mukhopadhyay, O. Drapier, E. R. Kinney, D. P. Morrison, T. V. Moukhanova, Min-Hye Kim, S. Campbell, V. E. Semenov, Tatsuya Chujo, K. Dehmelt, Jen-Chieh Peng, Xiong Wang, Dong Jo Kim, J. Murata, Mirta Dumancic, A. Veicht, and Tae-Yeon Lee

Subjects
Quantum chromodynamics, Physics, Particle physics, 010308 nuclear & particles physics, Drell–Yan process, Parton, 01 natural sciences, Spectral line, Nuclear physics, 0103 physical sciences, Quark–gluon plasma, Rapidity, Invariant mass, Perturbation theory (quantum mechanics), 010306 general physics
Abstract

We report a measurement of e+e− pairs from semileptonic heavy-flavor decays in p+p collisions at sNN=200 GeV. The e+e− pair yield from bb¯ and cc¯ is separated by exploiting a double differential fit done simultaneously in dielectron invariant mass and pT. We used three different event generators, pythia, mc@nlo, and powheg, to simulate the e+e− spectra from cc¯ and bb¯ production. The data can be well described by all three generators within the detector acceptance. However, when using the generators to extrapolate to 4π, significant differences are observed for the total cross section. These difference are less pronounced for bb¯ than for cc¯. The same model dependence was observed in already published d+A data. The p+p data are also directly compared with d+A data in mass and pT, and within the statistical accuracy no nuclear modification is seen.

Published
2017

38. Cross section and transverse single-spin asymmetry of muons from open heavy-flavor decays in polarized p+p collisions at s=200 GeV

Author

S. Kudo, S. P. Whitaker, R. A. Soltz, H. Nakagomi, T. Hoshino, A. V. Kazantsev, C. L. Silva, Y. Fukuda, L. Patel, Jiangyong Jia, Y. Goto, Y. Sekiguchi, T. C. Awes, Kyoichiro Ozawa, J. M. Durham, Yoshifumi Ueda, J. H. Do, L. Zou, C. L. Towell, Susumu Sato, S. Baumgart, D. Kawall, K. Tanida, D. Kleinjan, Minghui Liu, Kenneth Francis Read, I. Shein, T. Ichihara, K. B. Lee, I. Ravinovich, K. L. Smith, K. Sedgwick, Mihael Makek, M. Boer, D. Richford, Jong-Min Park, Taku Gunji, R. S. Towell, Y. Watanabe, J. Huang, Hari Guragain, Y. Fukao, I. Garishvili, C. A. Ogilvie, E. T. Atomssa, B. Komkov, F. Wei, M. Bai, V. Bumazhnov, S. Tarafdar, D. Black, Anne Marie Sickles, Prakhar Garg, M. Wysocki, B. Bannier, T. K. Hemmick, Bhawani Singh, S. Butsyk, B. Azmoun, Y. L. Yamaguchi, L. Ding, K. Gainey, C. Gal, I. Younus, M. Kofarago, D. Roach, J. S. Bok, T. Hester, T. Murakami, Yasuo Miake, K. DeBlasio, A. Meles, Sándor Lökös, S. Zhou, Julia Velkovska, H. Asano, S. Mizuno, A. Bagoly, Norio Saito, Tsutomu Mibe, Hideyuki Oide, Alice Mignerey, L. D'Orazio, S. Miyasaka, S. Vazquez-Carson, Don McGlinchey, K. N. Barish, Mikhail Malaev, K. M. Kijima, A. Pun, K. Hashimoto, Xingguo Li, M. Virius, S. D. Rolnick, Ryu, S. Zharko, Min-Hye Kim, S. Wolin, J. D. Osborn, Inseok Yoon, Peter Christiansen, Koji Sato, Y. Imazu, Animesh Datta, C. Y. Chi, Yasutada Akiba, S. I. Morrow, S. Sawada, M. I. Nagy, Zhiying You, A. Franz, S. Bathe, H. Masuda, Kensuke Homma, E. Richardson, S. P. Sorensen, P. Kline, K. S. Lee, M. Kurosawa, S. H. Lim, J. Runchey, J. S. Kapustinsky, D. Watanabe, Kei Nagashima, J. H. Yoo, M. Slunecka, V. Canoa Roman, Pawan Kumar Netrakanti, Agneta Oskarsson, A. Drees, A. Ster, N. Feege, Zirui Wang, D. Kincses, V. Babintsev, D. E. Fields, Y. Berdnikov, T. O. S. Haseler, J. Imrek, M. Tomášek, S. H. Lee, J. G. Lajoie, S. Syed, Y. Tanaka, H. Qu, E. Mannel, C. McKinney, Raphael Noel Tieulent, Brennan Schaefer, S. Nagamiya, A. Isinhue, S. Karthas, E. Vznuzdaev, Barbara Jacak, M. Beaumier, B. Lewis, J. Sun, Senta Greene, D. Kotov, M. Alfred, T. Hachiya, Michael William Phipps, Jennifer E. Perry, Vaclav Vrba, N. Grau, Prashant Shukla, Takao Sakaguchi, A. Sen, Jason Kamin, D. Kapukchyan, M. Chiu, Ajit Kumar Mohanty, M. Leitgab, Hideki Hamagaki, W. Fan, K. Aoki, M. Vargyas, G. David, T. Todoroki, K. S. Joo, D. K. Mishra, M. L. Brooks, S. F. Pate, C. Ayuso, S. P. Stoll, T. A. Shibata, K. I. Hahn, Shuo Han, M. Gonin, Ke. Nakamura, Byung-Sik Hong, X. He, A. Bazilevsky, N. Apadula, E. O'Brien, Robert Vertesi, J. A. Key, Daugherity, Motoi Inaba, J. C. Hill, P.L. McGaughey, Henner Buesching, A. Sukhanov, K. Kurita, Vladimir Samsonov, Christine Nattrass, K. Watanabe, J. Bryslawskyj, K. Shoji, M. McCumber, J. Koster, Mate Csanad, H. W. Yu, D. Isenhower, A. Taranenko, Tamas Novak, T. Moon, W.J. Metzger, D. Jouan, A. Iordanova, J. Murata, R. Petti, S. Kanda, Yongsun Kim, W. Peng, P. W. Stankus, D. Ivanishchev, S. Esumi, S. J. Jeon, X. Gong, V. Papavassiliou, Y. Nakamiya, D. Lynch, C. Baumann, C. O. Kim, A. D. Frawley, C. E. Perezlara, D. M. Lee, G. H. Lee, E. O. Lallow, D. Sharma, R. Pak, T. Engelmore, Atsushi Takahara, N. Riveli, X. Bai, M. Nihashi, A. Mwai, A. Deshpande, Mirta Dumancic, M. E. Connors, C. P. Singh, K. A. Drees, Martin Purschke, C. A. Aidala, Alexei Khanzadeev, M. Patel, Tomofumi Nagae, J. L. Nagle, B. M. Johnson, X. Jiang, J. D. Orjuela Koop, D. Kotchetkov, Y. Ito, S. K. Park, J. Rak, C. H. Chen, C. Xu, I. J. Choi, Filip Krizek, N. A. Lewis, B. Xia, V. Jorjadze, N. Crossette, M. Moskowitz, M. J. Skoby, J. Klatsky, E. Stenlund, Ferdinando Giordano, S. Huang, Carly W. Butler, A. Sexton, N. Cronin, J. B. Choi, Y. J. Kim, Sung Keun Park, R. P. Pisani, V. R. Loggins, J. T. Mitchell, R. Seto, Maya Hachiya Shimomura, Vardan Khachatryan, H. Sako, A. Manion, Timothy Thomas Rinn, Z. Ji, D. Yu Peressounko, T. W. Danley, Y. I. Makdisi, N. Hotvedt, R. Seidl, Dennis Perepelitsa, B. Fadem, R. S. Hollis, M. Grosse Perdekamp, G. Mitsuka, J. E. Frantz, Jongmin Lee, Brian Cole, Vladislav Manko, N. N. Ajitanand, P. Yin, A. Enokizono, P. K. Khandai, A. Taketani, Priyanka Sett, D. S. Jumper, G. D. N. Perera, Shoichi Hasegawa, A. Shaver, M. J. Tannenbaum, S. Choi, I. Tserruya, M. Jezghani, Takahiro Nakamura, V. Singh, B. K. Schmoll, A. Timilsina, T. Koblesky, E. Tennant, T. V. Moukhanova, M. Sarsour, A. Durum, E. Kistenev, Dmitry Blau, A. Glenn, P. V. Radzevich, E. J. Desmond, Eunja Kim, K. Dehmelt, J. Hanks, E. Vazquez-Zambrano, Jen-Chieh Peng, D. Reynolds, Inkyu Park, Balazs Ujvari, Xiong Wang, Dong Jo Kim, I. E. Yushmanov, A. Veicht, Jessy J. Alexander, Alexander Milov, I. Nakagawa, N. Novitzky, K. O. Eyser, R. Lacey, R. Granier de Cassagnac, Charles Maguire, D. E. Mihalik, Y. Gu, M. R. Stone, O. Drapier, D. P. Morrison, S. Campbell, B. H. Kang, T. Majoros, Tatsuya Chujo, K. Imai, B. Meredith, C. L. Woody, A. Berdnikov, H. A. Torii, V. S. Pantuev, Toru Sugitate, Kimberly Hill, François Fleuret, K. Okada, T. Nagashima, A. Garishvili, B. Sahlmueller, Z. Rowan, I. V. Sourikova, M. J. Leitch, M. Skolnik, Y. J. Kwon, H. Ge, K. Nakano, Ryugo S. Hayano, M. Finger, Y. Riabov, W. E. Sondheim, J. S. Kang, J. H. Kang, Kenta Shigaki, J. S. Haggerty, K. Boyle, A. S. Nyanin, Rachid Nouicer, A. N. Zelenski, P. Steinberg, Takahiro Fusayasu, T. Elder, C. P. Wong, Qiao Xu, L. D. Liu, Keiji Nagai, W. A. Zajc, S. Solano, D. Silvermyr, J. Seele, V. Baublis, A. Denisov, Yuki Watanabe, V. Cianciolo, A. Yanovich, Sergey Fokin, Y. S. Lai, Radek Novotny, H. Van Hecke, Y. H. Leung, M. Mendoza, Y. Ikeda, A. Takeda, S. R. P. Mohapatra, R. Akimoto, Viktor Riabov, C. Pinkenburg, M. Stepanov, G. Tarnai, T. Niida, A. Lebedev, R. Belmont, S. Yokkaichi, M. Rosati, and Tamás Csörgő

Subjects
Physics, Particle physics, Muon, 010308 nuclear & particles physics, media_common.quotation_subject, High Energy Physics::Phenomenology, 01 natural sciences, Asymmetry, Nuclear physics, Cross section (physics), Transverse plane, Correlation function, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Spin-½, media_common
Abstract

The cross section and transverse single-spin asymmetries of μ- and μ+ from open heavy-flavor decays in polarized p+p collisions at s=200 GeV were measured by the PHENIX experiment during 2012 at the Relativistic Heavy Ion Collider. Because heavy-flavor production is dominated by gluon-gluon interactions at s=200 GeV, these measurements offer a unique opportunity to obtain information on the trigluon correlation functions. The measurements are performed at forward and backward rapidity (1.4

Published
2017

39. Angular decay coefficients of J/ψ mesons at forward rapidity from p+p collisions at s=510 GeV

Author

S. Miyasaka, Keiji Nagai, N. Feege, Pawan Kumar Netrakanti, N. S. Bandara, T. O. S. Haseler, A. Meles, J. Seele, Vladimir Samsonov, E. T. Atomssa, Christine Nattrass, M. Tomášek, D. E. Fields, Takao Sakaguchi, A. Sen, A. D. Frawley, Y. Gu, S. Bathe, J. D. Orjuela Koop, C. Butler, L. Zou, C. H. Chen, H. Masuda, Kensuke Homma, Hideki Hamagaki, W. Fan, K. Aoki, M. Vargyas, G. David, T. Todoroki, J. Sun, Min-Hye Kim, K. I. Hahn, V. Bumazhnov, D. Black, A. Manion, J. L. Nagle, M. McCumber, Byung-Sik Hong, T. Shioya, A. Bazilevsky, Agneta Oskarsson, Barbara Jacak, Atsushi Takahara, D. Kincses, M. Chiu, Y. Berdnikov, E. O. Lallow, A. Taranenko, T. Majoros, N. Riveli, H. Stien, C. A. Ogilvie, A. J. Miller, K. A. Drees, J. A. Silva, C. L. Woody, S. H. Lee, T. K. Hemmick, Bhawani Singh, K. Kihara, T. Elder, Qiao Xu, H. W. Yu, Y. J. Kwon, A. Berdnikov, A. Sukhanov, C. McKinney, Brennan Schaefer, S. Nagamiya, Minghui Liu, Alexander Milov, K. Imai, M. E. Connors, S. J. Jeon, S. K. Park, J. Rak, H. F. Hamilton, M. Grosse Perdekamp, G. Mitsuka, J. E. Frantz, K. Kurita, Matthew Snowball, Vaclav Vrba, D. Silvermyr, K. L. Smith, G. J. Ottino, Yasuo Miake, I. Nakagawa, Kenneth Francis Read, P. Montuenga, Petr Gallus, K. DeBlasio, N. Novitzky, D. Richford, Shoichi Hasegawa, Maya Hachiya Shimomura, J. Klatsky, Vardan Khachatryan, I. Younus, J. S. Kang, Radek Novotny, M. I. Nagy, A. Enokizono, C. O. Kim, T. Nagashima, E. Joo, M. Patel, R. Pinson, S. Vazquez-Carson, Don McGlinchey, D. Watanabe, G. Tarnai, A. Yanovich, X. Jiang, I. V. Sourikova, Kei Nagashima, R. Pak, K. B. Lee, N. N. Ajitanand, Henner Buesching, D. P. Morrison, Koji Sato, T. Kempel, E. Vznuzdaev, Y. H. Leung, Anne Marie Sickles, Z. Rowan, M. Mendoza, V. R. Loggins, Y. I. Makdisi, V. Canoa Roman, A. Taketani, Priyanka Sett, A. V. Kazantsev, D. Kapukchyan, D. S. Jumper, M. L. Kimball, Z. Ji, Hari Guragain, A. Iordanova, K. Lovasz, J. Murata, J. B. Choi, M. Boer, S. Wolin, J. Imrek, L. Ding, V. S. Pantuev, K. N. Barish, Mirta Dumancic, D. Lynch, Moonhee Kim, G. D. N. Perera, M. Finger, D. Yu Peressounko, Dennis Perepelitsa, Y. Riabov, J. S. Bok, Tatsuya Chujo, H. Ge, S. Tarafdar, Raphael Noel Tieulent, J. Bryslawskyj, Kenta Shigaki, M. Kofarago, D. Roach, M. S. Daugherity, K. Dehmelt, K. Nakano, Jen-Chieh Peng, C. J. Press, Ferdinando Giordano, T. Niida, H. Asano, D. Dixit, I. Ravinovich, R. Cervantes, A. Pun, N. Apadula, W. E. Sondheim, A. S. Nyanin, A. Durum, D. Reynolds, A. Deshpande, M. J. Tannenbaum, Jong-Min Park, Taku Gunji, Dmitry Blau, S. Zharko, B. K. Schmoll, M. Bai, Kimberly Hill, Rachid Nouicer, A. N. Zelenski, N. Grau, A. Takeda, Y. Fukuda, E. J. Desmond, J. P. Dusing, C. Gal, E. Kistenev, K. Boyle, A. Drees, Yongsun Kim, W. Peng, P. W. Stankus, R. S. Hollis, M. Leitgab, Shuo Han, I. J. Choi, B. Xia, Xingguo Li, S. Syed, S. Karthas, Xiong Wang, Y. L. Yamaguchi, A. Lebedev, B. Meredith, M. Towell, N. Cronin, J. Hanks, H. Sako, R. Lacey, Julia Velkovska, M. Rosati, H. En'yo, Tamas Ferenc Csorgo, M. J. Leitch, S. Mizuno, J. D. Osborn, Inseok Yoon, Motoi Inaba, J. C. Hill, Mate Csanad, S. P. Sorensen, M. L. Brooks, L. Patel, T. C. Awes, Kyoichiro Ozawa, H. A. Torii, Toru Sugitate, Dong Jo Kim, E. K. Bownes, D. Kotov, S. P. Stoll, M. Virius, S. D. Rolnick, A. R. Mendez, Balazs Ujvari, A. Adare, I. E. Yushmanov, Senta Greene, C. Ayuso, Norio Saito, M. Nihashi, X. He, I. Tserruya, M. Jezghani, V. Singh, J. T. Mitchell, T. A. Shibata, Y. Aramaki, Alexei Khanzadeev, N. Hotvedt, R. Seidl, Vladislav Manko, D. E. Mihalik, S. Kudo, S. Huang, Zirui Wang, J. G. Lajoie, M. Alfred, T. Hachiya, E. O'Brien, Michael William Phipps, S. H. Lim, S. Lee, Jennifer E. Perry, Viktor Riabov, Serpil Yalcin, P. L. McGaughey, T. Koblesky, M. Sarsour, D. Jouan, D. Isenhower, S. P. Whitaker, Jiangyong Jia, Y. Goto, Tamas Novak, T. Moon, R. P. Pisani, J. Koster, V. Babintsev, C. P. Wong, L. D. Liu, W. A. Zajc, L. Xue, S. Beckman, P. Yin, J. H. Kang, T. V. Moukhanova, A. Denisov, Yuki Watanabe, E. Mannel, Sergey Fokin, A. Glenn, A. Mwai, Eunja Kim, D. Kleinjan, S. Campbell, J. S. Haggerty, A. Timilsina, C. Xu, A. Sexton, H. Van Hecke, R. Seto, Y. Ikeda, T. W. Danley, R. Akimoto, C. Pinkenburg, B. Fadem, M. Stepanov, Timothy Thomas Rinn, H. J. Kim, M. Kurosawa, J. H. Yoo, M. Slunecka, R. Belmont, R. S. Towell, Prashant Shukla, S. F. Pate, R. A. Soltz, J. A. Key, H. Nakagomi, T. Hoshino, C. L. Silva, D. H. Kim, D. Ivanishchev, V. Papavassiliou, A. S. Safonov, C. E. Perezlara, J. M. Durham, Yoshifumi Ueda, J. H. Do, T. Murakami, C. L. Towell, Susumu Sato, N. Vukman, M. Malaev, Martin Purschke, C. A. Aidala, H. Yamamoto, S. I. Morrow, S. Sawada, Y. Ito, A. Franz, J. Runchey, Y. Watanabe, F. Wei, V. Andrieux, D. Kawall, J. Huang, K. Tanida, Prakhar Garg, B. Azmoun, Zvi Hirsh Citron, M. Wysocki, B. Bannier, I. Shein, K. Sedgwick, Mihael Makek, P. Kline, A. Dion, Animesh Datta, T. Sumita, C. Y. Chi, Yasutada Akiba, J. R. Kotler, M. Beaumier, K. S. Joo, D. K. Mishra, J. G. Rubin, R. Petti, S. Esumi, D. Sharma, C. P. Singh, B. M. Johnson, N. A. Lewis, V. Jorjadze, J. Sziklai, Alice Mignerey, and Y. Imazu

Subjects
Physics, Quantum chromodynamics, Particle physics, Meson, 010308 nuclear & particles physics, Zero (complex analysis), Tevatron, Quarkonium, Lambda, 01 natural sciences, Helicity, 0103 physical sciences, Rapidity, Nuclear Experiment, 010306 general physics
Abstract

We report the first measurement of the full angular distribution for inclusive $J/\psi\rightarrow\mu^{+}\mu^{-}$ decays in $p$$+$$p$ collisions at $\sqrt{s}=510$ GeV. The measurements are made for $J/\psi$ transverse momentum $2

Published
2017

40. Measurements of B→J/ψ at forward rapidity in p+p collisions at s=510 GeV

Author

S. Miyasaka, A. Franz, Pawan Kumar Netrakanti, A. Sen, K. B. Lee, S. Syed, S. Karthas, V. S. Pantuev, Takao Sakaguchi, D. Kotov, Jong-Min Park, Taku Gunji, M. Tomášek, A. D. Frawley, M. Boer, Sándor Lökös, Jason Kamin, Kimberly Hill, K. N. Barish, L. Ding, S. Zharko, K. L. Smith, R. A. Soltz, H. Nakagomi, Byung-Sik Hong, J. Sun, A. Bazilevsky, Senta Greene, C. Ayuso, E. O'Brien, M. Kofarago, Y. Imazu, D. Roach, K. M. Kijima, H. W. Yu, S. Zhou, D. M. Lee, A. Pun, G. H. Lee, M. Virius, K. O. Eyser, I. Tserruya, M. Jezghani, S. D. Rolnick, D. Jouan, H. Van Hecke, Y. Ikeda, T. Hoshino, C. L. Silva, K. Okada, B. Sahlmueller, M. J. Leitch, K. Hashimoto, M. L. Brooks, Y. Fukao, B. Komkov, T. O. S. Haseler, Xingguo Li, P. Steinberg, B. Azmoun, V. Singh, H. Qu, M. Grosse Perdekamp, G. Mitsuka, T. Hester, J. E. Frantz, Norio Saito, Tsutomu Mibe, Hideyuki Oide, J. M. Durham, S. Wolin, R. Lacey, Dmitry Blau, Jongmin Lee, E. J. Mannel, T. Rinn, R. Akimoto, Hideki Hamagaki, W. Fan, K. Aoki, Yoshifumi Ueda, J. H. Do, M. Vargyas, Takahiro Fusayasu, V. Bumazhnov, D. Black, Ryugo S. Hayano, M. Finger, C. L. Towell, Susumu Sato, Y. L. Yamaguchi, S. H. Lim, R. Granier de Cassagnac, G. David, T. Todoroki, K. I. Hahn, Maya Hachiya Shimomura, Vardan Khachatryan, S. P. Sorensen, T. Elder, Qiao Xu, Shoichi Hasegawa, T. Koblesky, A. Shaver, Y. Riabov, P. Kline, K. S. Lee, A. Isinhue, S. Choi, Kei Nagashima, C. Pinkenburg, J. Bryslawskyj, Y. I. Makdisi, J. S. Kapustinsky, R. S. Towell, Prashant Shukla, Kenta Shigaki, Charles Maguire, A. Enokizono, Y. J. Kwon, V. Babintsev, S. P. Stoll, D. Silvermyr, N. Grau, N. Apadula, M. Leitgab, Shuo Han, M. Patel, Tamas Ferenc Csorgo, M. Stepanov, Atsushi Takahara, C. CanoaRoman, C. Gal, J. Hanks, E. Vazquez-Zambrano, P. K. Khandai, A. Taketani, Priyanka Sett, D. Kawall, D. E. Mihalik, G. Tarnai, D. S. Jumper, A. S. Nyanin, K. Tanida, X. Jiang, C. Xu, A. Drees, Julia Velkovska, M. Beaumier, M. Alfred, T. Hachiya, K. A. Drees, S. Mizuno, E. Kistenev, M. Rosati, D. Richford, Michael William Phipps, S. F. Pate, Raphael Noel Tieulent, Motoi Inaba, J. C. Hill, K. S. Joo, Rachid Nouicer, I. Younus, A. N. Zelenski, D. K. Mishra, T. Niida, A. Lebedev, J. S. Kang, Jennifer E. Perry, M. J. Tannenbaum, B. Ujvari, M. Sarsour, Mate Csanad, J. Rak, A. V. Kazantsev, A. Yanovich, Anne Marie Sickles, Barbara Jacak, I. Ravinovich, B. K. Schmoll, A. Sexton, H. Asano, A. Berdnikov, J. Klatsky, S. Kudo, K. Gainey, Ke. Nakamura, M. Gonin, Koji Sato, M. Nihashi, A. Glenn, P. V. Radzevich, M. S. Daugherity, Vladimir Samsonov, I. Shein, S. Yokkaichi, E. Tennant, Z. Rowan, M. Mendoza, Ferdinando Giordano, R. Seto, N. Crossette, M. Chiu, S. P. Whitaker, J. S. Bok, Y. Nakamiya, D. Lynch, J. G. Lajoie, R. Petti, T. W. Danley, M. Bai, Christine Nattrass, Eunja Kim, Y. Fukuda, Jiangyong Jia, Y. Goto, R. P. Pisani, I. E. Yushmanov, A. Sukhanov, K. Kurita, K. Sedgwick, J. H. Kang, S. Esumi, Moonhee Kim, J. A. Key, K. Watanabe, C. A. Ogilvie, B. Fadem, J. S. Haggerty, K. Dehmelt, A. Attila, D. Sharma, R. S. Hollis, X. He, Y. Tanaka, M. McCumber, Mihael Makek, L. Patel, Alexei Khanzadeev, H. Ge, K. Nakano, K. Shoji, T. Nagashima, A. Garishvili, C. O. Kim, Jen-Chieh Peng, Martin Purschke, C. A. Aidala, Agneta Oskarsson, Y. Sekiguchi, T. C. Awes, Kyoichiro Ozawa, D. Kleinjan, S. Campbell, W. E. Sondheim, Tomofumi Nagae, Robert Vertesi, R. Pak, E. Stenlund, C. Baumann, S. Huang, J. B. Choi, S. Kanda, Yongsun Kim, W. Peng, T. K. Hemmick, Bhawani Singh, Yasuo Miake, J. D. Osborn, Inseok Yoon, Zhiying You, J. L. Nagle, Zirui Wang, Ajit Kumar Mohanty, T. A. Shibata, I. V. Sourikova, Keiji Nagai, D. Reynolds, P. W. Stankus, M. J. Skoby, D. Kincses, Y. Watanabe, Y. Gu, Y. S. Lai, S. Solano, D. Kotchetkov, Y. Ito, J. Koster, K. Boyle, D. Ivanishchev, Y. Berdnikov, V. Papavassiliou, T. Chujo, C. E. Perezlara, M. Moskowitz, S. H. Lee, C. McKinney, M. Kurosawa, Brennan Schaefer, S. Nagamiya, M. R. Stone, J. Seele, L. Zou, K. DeBlasio, S. Baumgart, N. Cronin, Inkyu Park, E. J. Desmond, Vaclav Vrba, Xiong Wang, K. Imai, B. Meredith, E. T. Atomssa, J. H. Yoo, C. L. Woody, A. Mwai, M. Slunecka, R. Belmont, Minghui Liu, S. Vazquez-Carson, Don McGlinchey, Dong Jo Kim, V. R. Loggins, J. T. Mitchell, J. D. Orjuela Koop, C. H. Chen, H. A. Torii, A. Manion, N. Hotvedt, J. Huang, Toru Sugitate, Kenneth Francis Read, Henner Buesching, B. Lewis, R. Seidl, Vladislav Manko, D. Isenhower, Tamas Novak, T. Moon, M. Wysocki, T. V. Moukhanova, C. Butler, François Fleuret, B. Bannier, Min-Hye Kim, T. Ichihara, T. Murakami, S. Butsyk, P. Yin, M. S. Ryu, A. Veicht, Jessy J. Alexander, M. Skolnik, S. I. Morrow, P. Garg, S. Sawada, X. Gong, J. Runchey, A. Timilsina, S. Bathe, Alexander Milov, I. Nakagawa, Young-Ki Kim, T. Engelmore, N. Novitzky, Kensuke Homma, E. Richardson, A. Iordanova, I. Garishvili, F. Wei, O. Drapier, J. Murata, P. L. McGaughey, Mirta Dumancic, D. P. Morrison, B. H. Kang, Animesh Datta, C. Y. Chi, Yasutada Akiba, C. P. Singh, B. M. Johnson, Filip Krizek, N. A. Lewis, V. Jorjadze, Brian Cole, M. I. Nagy, D. Watanabe, A. Meles, D. E. Fields, E. Vznuzdaev, N. Riveli, D. Kapukchyan, Sung Keun Park, N. N. Ajitanand, G. D. N. Perera, Takahiro Nakamura, A. Durum, H. Sako, C. P. Wong, L. D. Liu, A. Deshpande, I. J. Choi, B. Xia, M. Connors, W. A. Zajc, V. Baublis, A. Denisov, Yuki Watanabe, V. Cianciolo, Sergey Fokin, A. Ster, N. Feege, A. Taranenko, S. J. Jeon, Hari Guragain, S. Tarafdar, Radek Novotny, Y. H. Leung, E. O. Lallow, X. Bai, S. K. Park, Peter Christiansen, Z. Ji, D. Yu Peressounko, Dennis Perepelitsa, S. R. P. Mohapatra, Viktor Riabov, Alice Mignerey, and L. D'Orazio

Subjects
Quantum chromodynamics, Physics, Meson, 010308 nuclear & particles physics, Hadron, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, High Energy Physics::Experiment, B meson, Rapidity, Vertex detector, Center of mass, Atomic physics, Nuclear Experiment, 010306 general physics, Collider
Abstract

We report the first measurement of the fraction of J/ψ mesons coming from B-meson decay (FB→J/ψ) in p+p collisions at s=510 GeV. The measurement is performed using the forward silicon vertex detector and central vertex detector at PHENIX, which provide precise tracking and distance-of-closest-approach determinations, enabling the statistical separation of J/ψ due to B-meson decays from prompt J/ψ. The measured value of FB→J/ψ is 8.1%±2.3%(stat)±1.9%(syst) for J/ψ with transverse momenta 0

Published
2017

41. High-space resolution imaging plate analysis of extreme ultraviolet (EUV) light from tin laser-produced plasmas

Author

Keiji Nagai, K. Yoshida, Teruyuki Ugomori, Christopher S. A. Musgrave, Shinsuke Fujioka, Hironori Atarashi, Takehiro Murakami, Tomokazu Iyoda, and Hiroaki Nishimura

Subjects
010302 applied physics, Materials science, Spectrometer, business.industry, Extreme ultraviolet lithography, Energy conversion efficiency, 02 engineering and technology, 021001 nanoscience & nanotechnology, Laser, 01 natural sciences, law.invention, Ion, Light intensity, Optics, law, Extreme ultraviolet, 0103 physical sciences, Optoelectronics, Plasma diagnostics, 0210 nano-technology, business, Instrumentation
Abstract

金沢大学先端科学・社会共創推進機構, With the advent of high volume manufacturing capabilities by extreme ultraviolet lithography, constant improvements in light source design and cost-efficiency are required. Currently, light intensity and conversion efficiency (CE) measurments are obtained by charged couple devices, faraday cups etc, but also phoshpor imaging plates (IPs) (BaFBr:Eu). IPs are sensitive to light and high-energy species, which is ideal for studying extreme ultraviolet (EUV) light from laser produced plasmas (LPPs). In this work, we used IPs to observe a large angular distribution (10°-90°). We ablated a tin target by high-energy lasers (1064 nm Nd:YAG, 1010 and 1011 W/cm2) to generate the EUV light. The europium ions in the IP were trapped in a higher energy state from exposure to EUV light and high-energy species. The light intensity was angular dependent; therefore excitation of the IP depends on the angle, and so highly informative about the LPP. We obtained high-space resolution (345 μm, 0.2°) angular distribution and grazing spectrometer (5-20 nm grate) data simultaneously at different target to IP distances (103 mm and 200 mm). Two laser systems and IP types (BAS-TR and BAS-SR) were also compared. The cosine fitting values from the IP data were used to calculate the CE to be 1.6% (SD ± 0.2) at 13.5 nm 2% bandwidth. Finally, a practical assessment of IPs and a damage issue are disclosed. © 2017 Author(s)., Embargo Period 12 months

Published
2017

42. Measurement of long-range angular correlations and azimuthal anisotropies in high-multiplicity p+Au collisions at sNN=200 GeV

Author

G. Tarnai, Hari Guragain, S. Tarafdar, T. Niida, V. R. Loggins, J. T. Mitchell, A. Lebedev, Y. J. Kwon, P. Montuenga, N. Hotvedt, R. Seidl, Vladislav Manko, M. Rosati, D. Dixit, D. Reynolds, M. Malaev, C. Xu, Maya Hachiya Shimomura, Tamás Csörgő, Martin Purschke, Prashant Shukla, S. F. Pate, Vardan Khachatryan, Y. I. Makdisi, Koji Sato, Xiong Wang, Toru Sugitate, P. Yin, S. Kudo, A. Sexton, H. Van Hecke, C. A. Aidala, Dong Jo Kim, A. Sukhanov, K. Kurita, Dmitry Blau, Matthew Snowball, R. Seto, M. Chiu, Y. Goto, M. J. Tannenbaum, T. W. Danley, J. H. Kang, J. S. Haggerty, D. Ivanishchev, V. Papavassiliou, C. A. Ogilvie, Z. Rowan, M. Mendoza, T. K. Hemmick, Bhawani Singh, B. Fadem, C. Pinkenburg, S. Campbell, K. Dehmelt, A. Timilsina, L. Zou, C. E. Perezlara, I. Tserruya, M. Jezghani, E. J. Desmond, B. K. Schmoll, Radek Novotny, M. Tomášek, C. O. Kim, V. Singh, D. E. Fields, N. Cronin, Y. Ito, K. DeBlasio, Agneta Oskarsson, V. S. Pantuev, M. Boer, T. Murakami, T. Koblesky, K. L. Smith, Moonhee Kim, H. Ge, M. Sarsour, Minghui Liu, V. Bumazhnov, J. Hanks, W. Peng, D. Richford, N. Grau, D. Kincses, N. Feege, P. W. Stankus, Shuo Han, Y. Berdnikov, K. A. Drees, C. McKinney, K. N. Barish, Brennan Schaefer, S. Zharko, H. Masuda, Byung-Sik Hong, A. Bazilevsky, S. Vazquez-Carson, M. McCumber, Kensuke Homma, S. I. Morrow, Alice Mignerey, S. Miyasaka, Y. H. Leung, R. A. Soltz, K. Nakano, W. E. Sondheim, R. S. Towell, H. Nakagomi, T. Hoshino, Keiji Nagai, Don McGlinchey, Kenneth Francis Read, V. Andrieux, Kimberly Hill, Vaclav Vrba, H. W. Yu, Motoi Inaba, J. C. Hill, Eunja Kim, A. Franz, J. Runchey, Takao Sakaguchi, C. L. Silva, J. D. Osborn, J. Klatsky, A. Sen, Inseok Yoon, S. Syed, S. Karthas, A. Pun, Balazs Ujvari, M. Patel, A. D. Frawley, C. Gal, Alexander Milov, I. Nakagawa, Julia Velkovska, Xingguo Li, Zirui Wang, X. Jiang, A. S. Safonov, N. Novitzky, J. Sun, J. M. Durham, M. Finger, Yoshifumi Ueda, G. Mitsuka, T. O. S. Haseler, D. Kotov, H. En'yo, M. L. Brooks, Y. L. Yamaguchi, M. J. Leitch, D. Lynch, S. P. Sorensen, Mate Csanad, I. E. Yushmanov, H. F. Hamilton, J. E. Frantz, G. J. Ottino, B. Azmoun, M. Slunečka, C. L. Towell, Susumu Sato, N. Vukman, Anne Marie Sickles, E. Mannel, J. Huang, I. J. Choi, S. Bathe, R. S. Hollis, P. L. McGaughey, X. He, D. P. Morrison, S. P. Stoll, Hideki Hamagaki, W. Fan, K. Aoki, T. Elder, Qiao Xu, S. Mizuno, Ferdinando Giordano, J. G. Lajoie, A. Enokizono, M. Alfred, T. Hachiya, Michael William Phipps, S. Lee, D. Silvermyr, G. David, T. Todoroki, K. I. Hahn, Prakhar Garg, G. D. N. Perera, D. Kawall, K. Tanida, Jennifer E. Perry, Min-Hye Kim, D. S. Jumper, J. S. Bok, K. Lovasz, A. Yanovich, Barbara Jacak, Zvi Hirsh Citron, Serpil Yalcin, T. Sumita, R. P. Pisani, A. V. Kazantsev, S. H. Lim, A. Durum, N. S. Bandara, I. Shein, D. Jouan, V. Babintsev, M. Virius, C. Butler, K. Sedgwick, C. Y. Chi, Yasutada Akiba, Vladimir Samsonov, Christine Nattrass, J. D. Orjuela Koop, A. Iordanova, J. Murata, Y. Fukuda, Mirta Dumancic, Mihael Makek, A. Deshpande, Timothy Thomas Rinn, H. Yamamoto, C. P. Wong, P. Kline, A. Dion, Kyoichiro Ozawa, Alexei Khanzadeev, J. H. Yoo, R. Belmont, S. Huang, J. B. Choi, Y. Watanabe, Shoichi Hasegawa, T. Shioya, L. D. Liu, M. I. Nagy, E. Kistenev, M. Connors, W. A. Zajc, J. L. Nagle, N. Apadula, A. Drees, M. S. Daugherity, C. P. Singh, B. M. Johnson, M. Beaumier, N. A. Lewis, D. K. Mishra, V. Jorjadze, J. Sziklai, L. Xue, J. H. Do, A. Denisov, Yuki Watanabe, Y. Riabov, D. E. Mihalik, R. Petti, Kenta Shigaki, R. Cervantes, S. Esumi, D. Sharma, Sergey Fokin, A. S. Nyanin, D. Kapukchyan, Rachid Nouicer, A. N. Zelenski, A. Takeda, T. Majoros, K. Imai, C. L. Woody, A. Berdnikov, H. Sako, Petr Gallus, Viktor Riabov, T. Nagashima, I. V. Sourikova, M. Grosse Perdekamp, E. O. Lallow, S. K. Park, Z. Ji, D. Yu Peressounko, Dennis Perepelitsa, Senta Greene, C. Ayuso, J. Bryslawskyj, E. O'Brien, T. A. Shibata, D. Isenhower, Tamas Novak, T. Moon, Kei Nagashima, V. Canoa Roman, J. Imrek, Raphael Noel Tieulent, H. Asano, Jong-Min Park, Taku Gunji, and S. D. Rolnick

Subjects
Physics, Particle physics, Range (particle radiation), 010308 nuclear & particles physics, Elliptic flow, High multiplicity, Collision, 01 natural sciences, Nuclear physics, Azimuth, 0103 physical sciences, Domain (ring theory), Nuclear Experiment, 010306 general physics, Anisotropy, Eccentricity (mathematics)
Abstract

We present the first measurements of long-range angular correlations and the transverse momentum dependence of elliptic flow $v_2$ in high-multiplicity $p$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. A comparison of these results with previous measurements in high-multiplicity $d$$+$Au and $^3{\rm He}$$+$Au collisions demonstrates a relation between $v_2$ and the initial collision eccentricity $\varepsilon_2$, suggesting that the observed momentum-space azimuthal anisotropies in these small systems have a collective origin and reflect the initial geometry. Good agreement is observed between the measured $v_2$ and hydrodynamic calculations for all systems, and an argument disfavoring theoretical explanations based on momentum-space domain correlations is presented. The set of measurements presented here allows us to leverage the distinct intrinsic geometry of each of these systems to distinguish between different theoretical descriptions of the long-range correlations observed in small collision systems.

Published
2017

43. Targets for high repetition rate laser facilities: needs, challenges and perspectives

Author

N. J. Hartley, Keiji Nagai, Rosa Letizia Zaffino, Arie Irman, Thomas Kluge, Mihail Octavian Cernaianu, Daniele Margarone, Cs. Vass, Douglass Schumacher, M. De Marco, Richard B. Stephens, L. G. Huang, P. Fitzsimmons, Neil Alexander, Sven Steinke, Irene Prencipe, Julien Fuchs, Tuomas Wiste, A. Pelka, Richard Briggs, Karl Zeil, J. Metzkes, Matteo Passoni, Daniel Papp, Dominik Kraus, Markus Büscher, C.C. Gheorghiu, R. Torchio, Sakura Pascarelli, Joachim Schulz, Jürgen Fassbender, J. Hund, Wigen Nazarov, Michal Smid, V. Leca, Artur Erbe, P. Lutoslawski, Jean-Paul Perin, Andrei Choukourov, C. Spindloe, Thomas E. Cowan, Stephan Kraft, Zuzana Konôpková, Guillaume Fiquet, Thomas Tschentscher, Marion Harmand, Ulrich Schramm, Institute of Radiation Physics [Dresden], Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Laboratoire pour l'utilisation des lasers intenses (LULI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), European Synchrotron Radiation Facility (ESRF), Ohio State University [Columbus] (OSU), University of Pennsylvania, General Atomics [San Diego], Forschungszentrum Jülich Peter Grünberg Institute (PGI-6), Forschungszentrum Jülich Peter Grünberg Institute, Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], IFIN-HH, Charles University [Prague] (CU), Institute of Ion Beam Physics and Materials Research [Dresden], Technische Universität Dresden = Dresden University of Technology (TU Dresden), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Deutsches Elektronen-Synchrotron [Zeuthen] (DESY), Helmholtz-Gemeinschaft = Helmholtz Association, University of St Andrews [Scotland], Politecnico di Milano [Milan] (POLIMI), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), Istituto Nazionale di Fisica Nucleare (INFN), Laboratoire de Cryogénie pour la Fusion (LCF ), Service des Basses Températures (SBT ), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), STFC Rutherford Appleton Laboratory (RAL), Science and Technology Facilities Council (STFC), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Spanish National Research Council (CSIC), European Project: 654220,H2020,H2020-INFRADEV-1-2014-1,EUCALL(2015), European Project: 637748,H2020,ERC-2014-STG,NanoSOFT(2015), European Project: 647554,H2020,ERC-2014-CoG,ENSURE(2015), and University of Pennsylvania [Philadelphia]

Subjects
target design and fabrication, Nuclear and High Energy Physics, high-energy density physics, High energy density physics, 01 natural sciences, 7. Clean energy, Bottleneck, 010305 fluids & plasmas, law.invention, Target design and fabrication < High power laser related laser components, law, Atomic and Molecular Physics, 0103 physical sciences, Electronic, Optical and Magnetic Materials, 010306 general physics, 01.03. Fizikai tudományok, Repetition (rhetorical device), Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics, Nuclear Energy and Engineering, Laser, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Systems engineering, and Optics, [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy
Abstract

International audience; A number of laser facilities coming online all over the world promise the capability of high-power laser experiments with shot repetition rates between 1 and 10 Hz. Target availability and technical issues related to the interaction environment could become a bottleneck for the exploitation of such facilities. In this paper, we report on target needs for three different classes of experiments: dynamic compression physics, electron transport and isochoric heating, and laser-driven particle and radiation sources. We also review some of the most challenging issues in target fabrication and high repetition rate operation. Finally, we discuss current target supply strategies and future perspectives to establish a sustainable target provision infrastructure for advanced laser facilities.

Published
2017

44. Multilayerization of Organophotocatalyst Films that Efficiently Utilize Natural Sunlight in a One-Pass-Flow Water Purification System

Author

Keiji Nagai, Toshiyuki Abe, Tomokazu Iyoda, and Yuzuri Yasuda

Subjects
Sunlight, Materials science, Renewable Energy, Sustainability and the Environment, General Chemical Engineering, Trimethylamine, Portable water purification, General Chemistry, law.invention, chemistry.chemical_compound, chemistry, Chemical engineering, law, Solar cell, Photocatalysis, Phthalocyanine, Environmental Chemistry, p–n junction, Perylene
Abstract

A full-spectrum visible-light-responsive organophotocatalyst membrane array is designed and employed for a one-pass-flow water purification system. Whereas previous photocatalyst systems required s...

Published
2013

45. Hexagonally Arranged Nanopore Film Fabricated via Selective Etching by 172-nm Vacuum Ultraviolet Light Irradiation

Author

Keiji Nagai, Motonori Komura, Kaori Kamata, and Tomokazu Iyoda

Subjects
Nuclear and High Energy Physics, Materials science, Ethylene oxide, Mechanical Engineering, Mesogen, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, 010305 fluids & plasmas, chemistry.chemical_compound, Nanopore, Nuclear Energy and Engineering, chemistry, Chemical engineering, Azobenzene, Etching (microfabrication), 0103 physical sciences, Side chain, Copolymer, General Materials Science, Irradiation, 0210 nano-technology, Civil and Structural Engineering
Abstract

Highly ordered nanopore arrays were successfully fabricated using poly(ethylene oxide) (PEO) and polymethacrylate with azobenzene mesogen in side chains [PMA(Az)] block copolymer film based on irradiation of 172-nm vacuum ultraviolet (VUV) light. The block copolymer forms a highly ordered microphase-separated film with perpendicularly oriented PEO cylinders just by thermal annealing through a self-assembling process. We found that the etching rate of the PEO homopolymer was much higher than that of the PMA(Az) homopolymer at a chamber pressure of 102 Pa of atmosphere under VUV irradiation. The etching rate of the PEO component in the two systems of microphase separation and macrophase separation of the homopolymer blend crucially depended on the feature size of phase separation. In the PEO selective etching process of the block copolymer film, the water-contact angle of the film dramatically increased due to elimination of hydrophilic PEO. The resulting nanopore array film will be useful for low-density target materials.

Published
2013

46. Fast plasma heating in a cone-attached geometry - Towards fusion ignition

Author

Y. Kitagawa, Peter Norreys, Hideaki Habara, Koji Tsubakimoto, Atsushi Sunahara, Ryosuke Kodama, Kazuo Tanaka, M. Tanpo, Hisanori Fujita, Keisuke Shigemori, Mitsuo Nakai, Yusuke Toyama, Takahisa Jitsuno, K. Mima, Karl Krushelnick, Matthew Zepf, Hiroaki Nishimura, Y. Izawa, Tomoyuki Jozaki, Hideo Nagatomo, N. Miyanaga, Hiroshi Azechi, Takahiro Matsuoka, Takayoshi Norimatsu, Keiji Nagai, Hiroyuki Shiraga, and T. Yamanaka

Subjects
Nuclear and High Energy Physics, Yield (engineering), Materials science, business.industry, Physics::Optics, Plasma, Condensed Matter Physics, Laser, Neutron temperature, law.invention, Ignition system, Core (optical fiber), Optics, Physics::Plasma Physics, law, Fusion ignition, Laser power scaling, Atomic physics, business
Abstract

We have developed a PW (0.5 ps/500 J) laser system to demonstrate fast heating of imploded core plasmas using a hollow cone shell target. Significant enhancement of thermal neutron yield has been realized with PW-laser heating, confirming that the high heating efficiency is maintained as the short-pulse laser power is substantially increased to a value nearly equivalent to the ignition condition. It appears that the efficient heating is realized by the guiding of the PW laser pulse energy within the hollow cone and by self-organized relativistic electron transport. Based on the experimental results, we are developing a 10 kJ-PW laser system to study the fast heating physics of high-density plasmas at an ignition-equivalent temperature.

Published
2016

47. Measurements of fast electron scaling generated by petawatt laser systems

Author

R. G. Evans, Robbie Scott, Motoaki Nakatsutsumi, Tammy Ma, M. H. Key, Richard B. Stephens, K. L. Lancaster, Farhat Beg, J. King, Hiroshi Azechi, Takayoshi Norimatsu, R. Kodama, T. Yabuuchi, Peter Norreys, P. M. Nilson, James Green, Matthew Zepf, M. G. Haines, Mingsheng Wei, K. Takeda, Satyabrata Kar, T. Tanimoto, João Valente, Keiji Nagai, Kazuo Tanaka, H. Habara, J. R. Davies, and Mark Sherlock

Subjects
Chirped pulse amplification, Physics, Range (particle radiation), Spectrometer, business.industry, Pulse duration, Electron, Condensed Matter Physics, Laser, Potential energy, law.invention, Optics, law, Irradiation, business
Abstract

Fast electron energy spectra have been measured for a range of intensities between 1018 and 1021 W cm-2 and for different target materials using electron spectrometers. Several experimental campaigns were conducted on petawatt laser facilities at the Rutherford Appleton Laboratory and Osaka University, where the pulse duration was varied from 0.5 to 5 ps relevant to upcoming fast ignition integral experiments. The incident angle was also changed from normal incidence to 40° in p -polarized. The results confirm a reduction from the ponderomotive potential energy on fast electrons at the higher intensities under the wide range of different irradiation conditions. © 2009 American Institute of Physics.

Published
2016

48. Fast heating of super-solid density plasmas towards laser fusion ignition

Author

K. A. Tanaka, Hisanori Fujita, Y. Kitagawa, N. Miyanaga, Hiroyuki Shiraga, Yusuke Toyama, Peter Norreys, T. Yamanaka, Takayoshi Norimatsu, Ryosuke Kodama, Karl Krushelnick, Hideaki Habara, Matthew Zepf, Keisuke Shigemori, Shinsuke Fujioka, Keiji Nagai, K. Mima, Takahisa Jitsuno, and Y. Izawa

Subjects
Materials science, Electronvolt, Plasma, Electron, Condensed Matter Physics, Laser, Collimated light, law.invention, Ignition system, Nuclear Energy and Engineering, Physics::Plasma Physics, law, Neutron, Atomic physics, Inertial confinement fusion
Abstract

We have studied fast heating of highly compressed plasmas using multi 100 TW laser light. Efficient propagation of the ultra-intense laser light and heating of the imploded plasmas were realized with a cone-attached shell target. Energy deposition rate of the ultra-intense laser pulse into high-density plasmas was evaluated from neutron measurements. Generation and propagation property of energetic electrons in the ultra-intense laser interactions were also investigated with solid density targets. About 40% of the laser energy converted to mega electron volts energetic electrons in the interactions with solid targets at intensities of 10 19 W cm -2 . These electrons propagated in the high-density plasmas with a divergence of 20-30° or jet-like collimation. Taking account of these experimental results, heating laser spot size is optimized for laser fusion ignition with a simple estimation.

Published
2016

49. Relationship between the morphology of poly(3-hexylthiophene)/methanofullerene composite and its photoelectrode characteristics in the water phase

Author

Keiji Nagai, Toshiyuki Abe, Takahito Hikage, Seiji Kakuta, and Miyuki Ichikawa

Subjects
chemistry.chemical_classification, Materials science, Morphology (linguistics), Base (chemistry), Composite number, General Physics and Astronomy, Electron donor, Substrate (electronics), chemistry.chemical_compound, chemistry, Chemical engineering, Catalytic oxidation, Phase (matter), Electrode, Organic chemistry, Physical and Theoretical Chemistry
Abstract

A composite of p-type poly(3-hexylthiophene-2,5-diyl) (P3HT) and n-type phenyl-C 61 -butyric-acid-methyl ester (PCBM) was prepared and first applied to a photoelectrode in the water phase. The composite formed on a base electrode exhibited only photoanodic characteristics in the presence of an electron donor. Based on a microscopic image, the p/n composite formed at the substrate side and most of the P3HT maldistributed near the surface were responsible for the specified charge transfer. Supporting this morphology, the photoanodic characteristics were further enhanced by the combination of p-type zinc phthalocyanine (oxidation catalyst working in the dark) with the composite surface.

Published
2012

50. Photoelectrode Characteristics of Partially Hydrolyzed Aluminum Phthalocyanine Chloride/Fullerene C60 Composite Nanoparticles Working in a Water Phase

Author

Keiji Nagai, Tomokazu Iyoda, Toshiyuki Abe, and Shuai Zhang

Subjects
lcsh:QD241-441, phthalocyanine, lcsh:Organic chemistry, fullerene, organophotocatalyst, photoelectrochemistry
Abstract

Photoelectrochemical measurements were used to study the photoelectrode characteristics of composite nanoparticles composed of fullerene C60 and partially hydrolyzed aluminum phthalocyanine chloride (AlPc). In cyclic voltammetry measurements, the electrodes coated with the composite nanoparticles were found to have photoanodic [electron donor: 2-mercaptoethanol (ME)] and photocathodic (electron acceptor: O2) characteristics similar to those of the vapor-deposited p/n junction electrode. Their photoanodic features were further investigated with respect to the transient photocurrent response to light irradiation and the dependence on ME concentration (under potentiostatic conditions), from which it was noted that there was a decrease in the initial spiky photocathodic current and saturation of the steady-state photoanodic current at a higher ME concentration. Thus, the reaction kinetics was probably dominated by charge transport process. Moreover, external and internal quantum efficiency spectrum measurements indicated that the composite nanoparticles responded to the full spectrum of visible light ( < 880 nm) for both the photoanodic and photocathodic current. The present research will assist comprehension of photocatalytic behavior of the composite nanoparticles.

Published
2012

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