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156 results on '"Ishida, Taku"'

1. Contrasting Irradiation Behavior of Dual Phases in Ti-6Al-4V Alloy at Low-Temperature Due to Omega-phase Precursors in Beta-phase Matrix

Author

Ishida, Taku, Kano, Sho, Wakai, Eiichi, Shibayama, Tamaki, Makimura, Shunsuke, and Abe, Hiroaki

Subjects
Condensed Matter - Materials Science, Physics - Accelerator Physics
Abstract

Aiming to simulate the radiation damage effect on a dual alpha+beta phase Ti-6Al-4V alloy utilized as high-intensity accelerator beam window material, a series of irradiation experiments were conducted with a 2.8 MeV-Fe^2+ ion beam in several dpa regions at room temperature. The nano-indentation hardness increased steeply at 1 dpa and unchanged up to 10 dpa, due to the saturation of defect clusters and tangled dislocations in the dominant alpha-phase matrix with a size of 2~3 nm and a density of about 1x10^23 m^-3. In contrast in the intergranular beta-phase, larger loops of 20~30 nm diameter were observed with much less density of about 5x10^20 m^-3. The diffraction pattern showed rectilinear diffuse streaks between the beta-phase reflections, corresponding to the omega-phase precursor, without dose dependency in its intensity. FFT/I-FFT analysis of the HREM revealed a sub-nanometer-sized lattice disorder with local fluctuations, not discrete but continuous, and homogeneously distributed within the matrix beta-phase stably against the irradiation. The significantly low dislocation density and the absence of phase transformation in the beta-phase matrix could be attributed either to the strong sink effect expected for this distinctive sub-nanometer-sized homogeneous lattice disorder or to the anomalous point defect recombination induced by the high mobility of vacancies, both of which are originated from the metastable omega-phase precursors specifically formed in the beta(BCC) phase of group-4 transition metals., Comment: 36 pages, 15 figures

Published
2024
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2. Combined Pre-Supernova Alert System with Kamland and Super-Kamiokande

Author

KamLAND, Collaborations, Super-Kamiokande, Abe, Seisho, Eizuka, Minori, Futagi, Sawako, Gando, Azusa, Gando, Yoshihito, Goto, Shun, Hachiya, Takahiko, Hata, Kazumi, Ichimura, Koichi, Ieki, Sei, Ikeda, Haruo, Inoue, Kunio, Ishidoshiro, Koji, Kamei, Yuto, Kawada, Nanami, Kishimoto, Yasuhiro, Koga, Masayuki, Kurasawa, Maho, Mitsui, Tadao, Miyake, Haruhiko, Morita, Daisuke, Nakahata, Takeshi, Nakajima, Rika, Nakamura, Kengo, Nakamura, Rikuo, Nakamura, Ryo, Nakane, Jun, Ozaki, Hideyoshi, Saito, Keita, Sakai, Taichi, Shimizu, Itaru, Shirai, Junpei, Shiraishi, Kensuke, Shoji, Ryunosuke, Suzuki, Atsuto, Takeuchi, Atsuto, Tamae, Kyoko, Watanabe, Hiroko, Watanabe, Kazuho, Yoshida, Sei, Umehara, Saori, Fushimi, Ken-Ichi, Kotera, Kenta, Urano, Yusuke, Berger, Bruce E., Fujikawa, Brian K., Larned, John G., Maricic, Jelena, Fu, Zhenghao, Smolsky, Joseph, Winslow, Lindley A., Efremenko, Yuri, Karwowski, Hugon J., Markoff, Diane M., Tornow, Werner, Dell'Oro, Stefano, O'Donnell, Thomas, Detwiler, Jason A., Enomoto, Sanshiro, Decowski, Michal P., Weerman, Kelly M., Grant, Christopher, Song, Hasung, Li, Aobo, Axani, Spencer N., Garcia, Miles, Abe, Ko, Bronner, Christophe, Hayato, Yoshinari, Hiraide, Katsuki, Hosokawa, Keishi, Ieki, Kei, Ikeda, Motoyasu, Kameda, June, Kanemura, Yuki, Kaneshima, Ryota, Kashiwagi, Yuri, Kataoka, Yousuke, Miki, Shintaro, Mine, Shunichi, Miura, Makoto, Moriyama, Shigetaka, Nakahata, Masayuki, Nakano, Yuuki, Nakayama, Shoei, Noguchi, Yohei, Sato, Kazufumi, Sekiya, Hiroyuki, Shiba, Hayato, Shimizu, Kotaro, Shiozawa, Masato, Sonoda, Yutaro, Suzuki, Yoichiro, Takeda, Atsushi, Takemoto, Yasuhiro, Tanaka, Hidekazu K., Yano, Takatomi, Han, Seungho, Kajita, Takaaki, Okumura, Kimihiro, Tashiro, Takuya, Tomiya, Takuya, Wang, Xubin, Yoshida, Shunsuke, Fernandez, Pablo, Labarga, Luis, Ospina, Nataly, Zaldivar, Bryan, Pointon, Barry W., Kearns, Edward, Raaf, Jennifer L., Wan, Linyan, Wester, Thomas, Bian, Jianming, Griskevich, Jeff, Smy, Michael B., Sobel, Henry W., Takhistov, Volodymyr, Yankelevich, Alejandro, Hill, James, Jang, MinCheol, Lee, Seonghak, Moon, DongHo, Park, RyeongGyoon, Bodur, Baran, Scholberg, Kate, Walter, Chris W., Beauchêne, Antoine, Drapier, Olivier, Giampaolo, Alberto, Mueller, Thomas A., Santos, Andrew D., Paganini, Pascal, Quilain, Benjamin, Rogly, Rudolph, Nakamura, Taku, Jang, Jee-Seung, Machado, Lucas N., Learned, John G., Choi, Koun, Iovine, Nadege, Cao, Son V., Anthony, Lauren H. V., Martin, Daniel G. R., Prouse, Nick W., Scott, Mark, Uchida, Yoshi, Berardi, Vincenzo, Calabria, Nicola F., Catanesi, M. G., Radicioni, Emilio, Langella, Aurora, de Rosa, Gianfranca, Collazuol, Gianmaria, Feltre, Matteo, Iacob, Fabio, Mattiazzi, Marco, Ludovici, Lucio, Gonin, Michel, Périssé, Lorenzo, Pronost, Guillaume, Fujisawa, Chiori, Horiuchi, Shogo, Kobayashi, Misaki, Liu, Yu-Ming, Maekawa, Yuto, Nishimura, Yasuhiro, Okazaki, Reo, Akutsu, Ryosuke, Friend, Megan, Hasegawa, Takuya, Ishida, Taku, Kobayashi, Takashi, Jakkapu, Mahesh, Matsubara, Tsunayuki, Nakadaira, Takeshi, Nakamura, Kenzo, Oyama, Yuichi, Sakashita, Ken, Sekiguchi, Tetsuro, Tsukamoto, Toshifumi, Yrey, Antoniosk Portocarrero, Bhuiyan, Nahid, Burton, George T., Di Lodovico, Francesca, Gao, Joanna, Goldsack, Alexander, Katori, Teppei, Migenda, Jost, Ramsden, Rory M., Xie, Zhenxiong, Zsoldos, Stephane, Suzuki, Atsumu T., Takagi, Yusuke, Takeuchi, Yasuo, Zhong, Haiwen, Feng, Jiahui, Feng, Li-Cheng, Hu, Jianrun, Hu, Zhuojun, Kawaue, Masaki, Kikawa, Tatsuya, Mori, Masamitsu, Nakaya, Tsuyoshi, Wendell, Roger A., Yasutome, Kenji, Jenkins, Sam J., McCauley, Neil K., Mehta, Pruthvi, Tarrant, Adam, Wilking, Mike J., Fukuda, Yoshiyuki, Itow, Yoshitaka, Menjo, Hiroaki, Ninomiya, Kotaro, Yoshioka, Yushi, Lagoda, Justyna, Mandal, Maitrayee, Mijakowski, Piotr, Prabhu, Yashwanth S., Zalipska, Joanna, Jia, Mo, Jiang, Junjie, Shi, Wei, Yanagisawa, Chiaki, Harada, Masayuki, Hino, Yota, Ishino, Hirokazu, Koshio, Yusuke, Nakanishi, Fumi, Sakai, Seiya, Tada, Tomoaki, Tano, Tomohiro, Ishizuka, Takeharu, Barr, Giles, Barrow, Daniel, Cook, Laurence, Samani, Soniya, Wark, David, Holin, Anna, Nova, Federico, Jung, Seunghyun, Yang, Byeongsu, Yang, JeongYeol, Yoo, Jonghee, Fannon, Jack E. P., Kneale, Liz, Malek, Matthew, McElwee, Jordan M., Thiesse, Matthew D., Thompson, Lee F., Wilson, Stephen T., Okazawa, Hiroko, Mohan, Lakshmi S., Kim, SooBong, Kwon, Eunhyang, Seo, Ji-Woong, Yu, Intae, Ichikawa, Atsuko K., Nakamura, Kiseki D., Tairafune, Seidai, Nishijima, Kyoshi, Eguchi, Aoi, Nakagiri, Kota, Nakajima, Yasuhiro, Shima, Shizuka, Taniuchi, Natsumi, Watanabe, Eiichiro, Yokoyama, Masashi, de Perio, Patrick, Fujita, Saki, Jesus-Valls, Cesar, Martens, Kai, Tsui, Ka M., Vagins, Mark R., Xia, Junjie, Izumiyama, Shota, Kuze, Masahiro, Matsumoto, Ryo, Terada, Kotaro, Asaka, Ryusei, Ishitsuka, Masaki, Ito, Hiroshi, Ommura, Yuga, Shigeta, Natsuki, Shinoki, Masataka, Yamauchi, Koki, Yoshida, Tsukasa, Gaur, Rhea, Gousy-Leblan, Vincent, Hartz, Mark, Konaka, Akira, Li, Xiaoyue, Chen, Shaomin, Xu, Benda, Zhang, Aiqiang, Zhang, Bin, Posiadala-Zezula, Magdalena, Boyd, Steven B., Edwards, Rory, Hadley, David, Nicholson, Matthew, O'Flaherty, Marcus, Richards, Benjamin, Ali, Ajmi, Jamieson, Blair, Amanai, Shogo, Marti-Magro, Lluis, Minamino, Akihiro, Shibayama, Ryo, and Suzuki, Serina

Subjects
High Energy Physics - Experiment, Astrophysics - High Energy Astrophysical Phenomena, Physics - Instrumentation and Detectors
Abstract

Preceding a core-collapse supernova, various processes produce an increasing amount of neutrinos of all flavors characterized by mounting energies from the interior of massive stars. Among them, the electron antineutrinos are potentially detectable by terrestrial neutrino experiments such as KamLAND and Super-Kamiokande via inverse beta decay interactions. Once these pre-supernova neutrinos are observed, an early warning of the upcoming core-collapse supernova can be provided. In light of this, KamLAND and Super-Kamiokande, both located in the Kamioka mine in Japan, have been monitoring pre-supernova neutrinos since 2015 and 2021, respectively. Recently, we performed a joint study between KamLAND and Super-Kamiokande on pre-supernova neutrino detection. A pre-supernova alert system combining the KamLAND detector and the Super-Kamiokande detector was developed and put into operation, which can provide a supernova alert to the astrophysics community. Fully leveraging the complementary properties of these two detectors, the combined alert is expected to resolve a pre-supernova neutrino signal from a 15 M$_{\odot}$ star within 510 pc of the Earth, at a significance level corresponding to a false alarm rate of no more than 1 per century. For a Betelgeuse-like model with optimistic parameters, it can provide early warnings up to 12 hours in advance., Comment: Resubmitted to ApJ. 22 pages, 16 figures, for more information about the combined pre-supernova alert system, see https://www.lowbg.org/presnalarm/

Published
2024
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3. Novel Materials and Concepts for Next-Generation High Power Target Applications

Author

Ammigan, Kavin, Bidhar, Sujit, Pellemoine, Frederique, Pronskikh, Vitaly, Pushka, David, Yonehara, Katsuya, Zwaska, Robert, Couet, Adrien, Moorehead, Michael, Ishida, Taku, Makimura, Shunsuke, Densham, Christopher, Fitton, Michael, Harvey-Fishenden, Eric, Davenne, Tristan, Jenkins, David, Loveridge, Peter, O'Dell, Joe, Rogers, Chris, Wilcox, Dan, Calviani, Marco, Gilardoni, Simone, Nuiry, Francois-Xavier, Perillo-Marcone, Antonio, Bultman, Nathan, Gao, Jian, Larmann, Michael, LaVere, Michael, Mittig, Wolfgang, Reaume, Marc, Wei, Jie, Xu, Ying, Muhrer, Gunter, Shea, Thomas, Thomas, Cyrille, Wohlmuther, Michael, Wakai, Eiichi, Barbier, Charlotte, and Riemer, Bernie

Subjects
Physics - Accelerator Physics
Abstract

Novel beam-intercepting materials and targetry concepts are essential to improve the performance, reliability and operation lifetimes of next generation multi-megawatt (multi-MW) accelerator target facilities. The beam-intercepting materials and components must sustain an order-of-magnitude increase in particle beam intensities and are beyond the current state-of-the-art. With conventional materials already limiting the scope of experiments, it is crucial to investigate novel target materials, technologies and concepts that will satisfy the requirements and maximize the physics benefits of future energy and intensity frontier experiments. This paper provides an overview of the related targetry R&D required over the next 10 years to support and enable future high-power accelerator target facilities.

Published
2022

5. Tensile behavior of dual-phase titanium alloys under high-intensity proton beam exposure: radiation-induced omega phase transformation in Ti-6Al-4V

Author

Ishida, Taku, Wakai, Eiichi, Makimura, Shunsuke, Casella, Andrew M., Edwards, Danny J., Prabhakaran, Ramprashad, Senor, David J., Ammigan, Kavin, Bidhar, Sujit, Hurh, Patrick G., Pellemoine, Frederique, Densham, Christopher J., Fitton, Michael D., Bennett, Joe M., Kim, Dohyun, Simos, Nikolaos, Hagiwara, Masayuki, Kawamura, Naritoshi, Meigo, Shin-ichiro, and Yonehara, Katsuya

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

A high-intensity proton beam exposure with 181 MeV energy has been conducted at Brookhaven Linac Isotope Producer facility on various material specimens for accelerator targetry applications, including titanium alloys as a beam window material. The radiation damage level of the analyzed capsule was 0.25 dpa at beam center region with an irradiation temperature around 120 degree C. Tensile tests showed increased hardness and a large decrease in ductility for the dual alpha+beta-phase Ti-6Al-4V Grade-5 and Grade-23 extra low interstitial alloys, with the near alpha-phase Ti-3Al-2.5V Grade-9 alloy still exhibiting uniform elongation of a few % after irradiation. Transmission Electron Microscope analyses on Ti-6Al-4V indicated clear evidence of a high-density of defect clusters with size less than 2 nm in each alpha-phase grain. The beta-phase grains did not contain any visible defects such as loops or black dots, while the diffraction patterns clearly indicated omega-phase precipitation in an advanced formation stage. The radiation-induced omega-phase transformation in the beta-phase could lead to greater loss of ductility in Ti-6Al-4V alloys in comparison with Ti-3Al-2.5V alloy with less beta-phase., Comment: 23 pages, 9 figures, In Press

Published
2020
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6. Radiation Damage Studies on Titanium Alloys as High Intensity Proton Accelerator Beam Window Materials

Author

Ishida, Taku, Wakai, Eiichi, Makimura, Shunsuke, Hurh, Patrick G., Ammigan, Kavin, Casella, Andrew M., Edwards, Danny J., Senor, David J., Densham, Christopher J., Fitton, Michael, Bennett, Joe, Kim, Dohyun, Simos, Nikolaos, Calviani, Marco, and Martin, Claudio Torregrosa

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment, Physics - Accelerator Physics
Abstract

A high-strength dual alpha+beta phase titanium alloy Ti-6Al-4V is utilized as a material for beam windows in several accelerator target facilities. However, relatively little is known about how material properties of this alloy are affected by high-intensity proton beam irradiation. With plans to upgrade neutrino facilities at J-PARC and Fermilab to over 1 MW beam power, the radiation damage in the window material will reach a few displacements per atom (dpa) per year, significantly above the ~0.3 dpa level of existing data. The RaDIATE collaboration has conducted a high intensity proton beam irradiation of various target and window material specimens at BLIP facility, including a variety of titanium alloys. Post-Irradiation Examination of the specimens in the 1st capsule, irradiated at up to 0.25 dpa, is in progress. Tensile tests in a hot cell at PNNL exhibited a clear signature of radiation hardening and loss of ductility for Ti-6Al-4V, while Ti-3Al-2.5V, with less beta phase, exhibited less severe hardening. Microstructural investigations will follow to study the cause of the difference in tensile behavior between these alloys. High-cycle fatigue (HCF) performance is critical to the lifetime estimation of beam windows exposed to a periodic thermal stress from a pulsed proton beam. The 1st HCF data on irradiated titanium alloys are to be obtained by a conventional bend fatigue test at Fermilab and by an ultrasonic mesoscale fatigue test at Culham Laboratory. Specimens in the 2nd capsule, irradiated at up to ~1 dpa, cover typical titanium alloy grades, including possible radiation-resistant candidates. These systematic studies on the effects of radiation damage of titanium alloys are intended to enable us to predict realistic lifetimes of current beam windows made of Ti-6Al-4V and to extend the lifetime by choosing a more radiation and thermal shock tolerant alloy., Comment: 10 pages, 7 figures, In Proc. of IWSMT-14, 14th International Workshop on Spallation Materials Technology, 11th-17th Nov. 2018 at Fukushima, Japan

Published
2019
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7. A new electron-multiplier-tube-based beam monitor for muon monitoring at the T2K experiment

Author

Ashida, Yosuke, Friend, Megan, Ichikawa, Atsuko, Ishida, Taku, Kubo, Hajime, Nakamura, Keigo, Sakashita, Ken, and Uno, Wataru

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

Muon beam monitoring is indispensable for indirectly monitoring accelerator-produced neutrino beams in real time. Though Si photodiodes and ionization chambers have been successfully used as muon monitors at the T2K experiment, sensors that are more radiation tolerant are desired for future operation. We have investigated the electron-multiplier tube (EMT) as a new sensor for muon monitoring. Secondary electrons produced by the passage of muons at dynodes are multiplied in the tube and produce signal. Two prototype detectors were installed at the T2K muon monitor location, and various EMT properties were studied based on in situ data taken with the T2K muon beam. The signal size is as expected based on calculation, and the EMTs show a sufficiently fast time response for bunch-by-bunch beam monitoring. The spill-by-spill intensity resolution is 0.4%, better than the required value (1%). Signal linearity within $\pm$1% is achieved at proton beam powers up to 460 kW (with +250 kA focusing horn operation). A gradual signal decrease was observed during the initial exposure, due to the stabilization of dynode materials, before the response became stable within $\pm$1%. This work demonstrates that EMTs are a good candidate for future muon monitoring at T2K, and may also have other more general applications., Comment: 23 pages, 20 figures, 6 tables

Published
2018
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9. Operational Status and Power Upgrade Prospects of the Neutrino Experimental Facility at J-PARC

Author

Ishida, Taku

Subjects
Physics - Accelerator Physics, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

In order to explore CP asymmetry in the lepton sector, a power upgrade to the neutrino experimental facility at J-PARC is a key requirement for both the Tokai to Kamioka (T2K) long-baseline neutrino oscillation experiment and a future project with Hyper-Kamiokande. Based on five years of operational experience, the facility has achieved stable operation with 230 kW beam power without significant problems on the beam-line apparatus. After successful maintenance works in 2013-2014 to replace all electromagnetic horns and a production target, the facility is now ready to accomodate a 750-kW-rated beam. Also, the possibility of achieving a few to multi-MW beam operation is discussed in detail., Comment: 4 pages, 8 figures, talk presented at the 2nd international symposium on science at J-PARC (J-PARC 2014), Tsukuba, Ibaraki, Japan on July 2014

Published
2014

12. The First Results of K2K long-baseline Neutrino Oscillation Experiment

Author

Ishida, Taku

Subjects
High Energy Physics - Experiment
Abstract

The first results of the K2K(KEK to Kamioka) long-baseline neutrino oscillation experiment are presented in this talk. In 1999 7.2x10^18 protons on target were delivered to the experiment. During this period of running there were 3 events fully contained in the Super-Kamiokande inner detector fiducial area which occurred during the beam spill timing window. In the case of no oscillations the expected number of events during this period was 12.3+1.7-1.9. The near detectors located at KEK also have begun detailed measurements of neutrino interactions in water at around 1 GeV., Comment: 5 pages, 5 figures, Talk at the 7th Conference On Intersections Between Particle And Nuclear Physics (CIPANP2000), 25-28 May 2000, Quebec, Canada

Published
2000
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13. Effect of light sigma-meson Production in ppbar --> 3 pi0 at rest

Author

Ishida, Muneyuki, Komada, Toshihiko, Ishida, Shin, Ishida, Taku, Takamatsu, Kunio, and Tsuru, Tsuneaki

Subjects
High Energy Physics - Phenomenology
Abstract

The pi0 pi0 mass spectra and angular distributions around KKbar -threshold and at 1.5 GeV in ppbar (at rest) --> 3 pi0 in the Crystal Barrel experiment are reanalyzed by applying the new method, which is consistent with unitarity of S-matrix and expressed directly by resonance parameters. The effects of light sigma-meson production are clearly seen to improve the fit with sigma, in comparing with the fit without sigma., Comment: 8 pages, 1 Postscript figure, uses ptptex.sty

Published
2000
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14. Effect of sigma(600)-Production in pp_bar to 3pi0 at rest

Author

Ishida, Muneyuki, Komada, Toshihiko, Ishida, Shin, Ishida, Taku, Takamatsu, Kunio, and Tsuru, Tsuneaki

Subjects
High Energy Physics - Phenomenology
Abstract

The pi0 pi0 mass spectra and angular distributions around KK_bar-threshold and at 1.5 GeV in pp_bar(at rest) to 3pi0 in the Crystal Barrel experiment are reanalyzed by applying the new method, which is consistent with unitarity of S-matrix and expressed directly by resonance parameters. The effects of light sigma-meson production are clearly seen to improve the fit with sigma, in comparing with the fit without sigma., Comment: 4 pages, 1 eps figure, uses espcrc1.sty Proceedings of the int. conf. Hadron'99 at Beijing, Aug. in 1999. For our activities on sigma, visit http://amaterasu.kek.jp/sigma

Published
1999
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15. Observed Properties of sigma-particle

Author

Ishida, Muneyuki, Ishida, Shin, Ishida, Taku, Takamatsu, Kunio, and Tsuru, Tsuneaki

Subjects
High Energy Physics - Phenomenology
Abstract

Recently we obtained the evidence for the existence of sigma(600) meson, which had been sought but missing for a long time, by reanalyzing the I=0 S-wave pi pi scattering phase shift. The sigma-existence was also suggested through the analyses of pi pi production processes, pp central collision pp to pp pi^0 pi^0 and J/psi to omega pi pi decay. The observed properties through these works of sigma meson satisfy the mass and width relation of SU(2) linear sigma model. The physical origin of the repulsive background phase shift delta_{BG}, which was essential to lead to the sigma-existence in our phase shift analysis, is also due to the "compensating lambda phi^4-interaction" in linear sigma model. Furthermore in this talk the experimental property of the delta_{BG} is shown to be describable quantitatively in the framework of linear sigma model including rho-meson contribution., Comment: 6 pages, 2 eps figure, uses frascatiphys.sty proceedings of Int. Conf. Workshop on Hadron Spectroscopy, Frascati, March 8-12, 1999

Published
1999

16. Relation between Scattering and Production Amplitudes - concerning sigma Particle in pi pi System -

Author

Ishida, Muneyuki, Ishida, Shin, and Ishida, Taku

Subjects
High Energy Physics - Phenomenology
Abstract

In a series of previous papers the present authors and collaborators have shown strong evidence for existence of the long-sought sigma-particle by analyzing the pi pi-scattering and pi pi-production processes, applying, respectively, the IA method and the VMW method. In this paper we examine the relation between the scattering amplitude T and the production amplitude F from the viewpoint of the unitarity and the final state interaction (FSI) theorem by using a simple field theoretical model. As a result it is shown that the amplitudes in the physical state representation are directly represented through the Breit-Wigner amplitudes of the relevant resonances, and the respective forms of T and F coincide with those in the IA and VMW methods, justifying our methods of analyses., Comment: 14 pages, 5 eps figures, uses ptptex.sty. To be published in Progress of Theoretical Physics

Published
1998
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17. Reply to the criticism raised by Pennington on our pipi-Production Amplitudes

Author

Ishida, Muneyuki, Ishida, Shin, and Ishida, Taku

Subjects
High Energy Physics - Phenomenology
Abstract

A recent criticism raised by M.R.Pennington on our pipi-production amplitudes seems to be due to his misunderstanding on our description, and is not right. Essential point of the relation between our scattering and production amplitudes is, in connection to the unitarity and the final state interaction theorem, briefly explained., Comment: 4 pages, TeX, uses ptptex.sty

Published
1998

18. Re-analysis of \pi\pi / K\pi Phase Shift and Existence of \sigma$(600) / \kappa(900)-Particle

Author

Ishida, Taku, Ishida, Muneyuki, Ishida, Shin, Takamatsu, Kunio, and Tsuru, Tsuneaki

Subjects
High Energy Physics - Phenomenology
Abstract

Re-analyzing the old phase shift data of I=0, \pi\pi (I=1/2, K\pi) scattering, we show an evidence for existence of the \sigma-particle (\kappa-particle) with a comparatively light mass, which has been missing for a long time: In the analysis we have applied a new method of interfering Breit-Wigner amplitudes, which makes the scattering amplitude parametrized in terms of only physical quantities, mass and width of resonant particles, in conformity with unitarity. We have introduced phenomenologically a background phase shift \delta_{BG} of repulsive core type. The \chi^2-fits of the both \pi\pi- and K\pi- phase shifts are improved greatly with the \delta_{BG} over the conventional fits without it., Comment: Talk at HADRON'97, the 7th int. conf. on hadron spectroscopy, BNL, August 1997. 4 pages with 3 eps figures

Published
1997
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19. Relation between Scattering and Production Amplitude - Case of Intermediate \sigma-Particle in \pi\pi-System

Author

Ishida, Muneyuki, Ishida, Shin, and Ishida, Taku

Subjects
High Energy Physics - Phenomenology
Abstract

The relation between scattering and production amplitudes are investigated, using a simple field theoretical model, from the general viewpoint of unitarity and the applicability of final state interaction(FSI-) theorem. The IA-method and VMW-method, which are applied to our phenomenological analyses suggesting the \sigma-existence, are obtained as the physical state representations of scattering and production amplitudes, respectively. Moreover, the VMW-method is shown to be an effective method to obtain the resonance properties from general production processes, while the conventional analyses based on the ``universality'' of \pi\pi-scattering amplitude are powerless for this purpose., Comment: Talk at HADRON'97, the 7th int. conf. on hadron spectroscopy, BNL, August 1997. 4 pages with no figure

Published
1997
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20. \sigma-Particle in Production Processes

Author

Takamatsu, Kunio, Ishida, Muneyuki, Ishida, Shin, Ishida, Taku, and Tsuru, Tsuneaki

Subjects
High Energy Physics - Phenomenology
Abstract

A S-wave \pi\pi resonance below 1 GeV/c^2, sigma has been observed in analyses of the phase shift data of \pi\pi scatterings. It is important to observe it in production processes. A huge events of \pi^0\pi^0 below 1 GeV/c^2 is seen in the central production of the GAMS experiment. Its mass spectrum is well described by the variant mass and width method (VMW) including f_0(980), f_2(1270) and a S-wave resonance which might be assigned to be a sigma. We report here that the angular distributions of the \pi^0\pi^0 system are also described with the S-wave resonance interfering with f_0(980) and the tail of f_2(1270) by VMW. The same method is applied to the \pi^+\pi^- data of J/\psi \to \omega\pi\pi decay, and is shown that not only \pi^+\pi^- mass spectrum but also its cos\theta_\pi distributions are described well., Comment: Talk at HADRON'97, the 7th int. conf. on hadron spectroscopy, BNL, August 1997. 4 pages with 2 eps figures

Published
1997
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21. Analysis of K\pi-scattering phase shift and existence of \kappa(900)-particle

Author

Ishida, Shin, Ishida, Muneyuki, Ishida, Taku, Takamatsu, Kunio, and Tsuru, Tsuneaki

Subjects
High Energy Physics - Phenomenology
Abstract

Recently we have shown an evidence for existence of \sigma-particle in the previous works; where the \pi\pi S-wave phase shift is reanalyzed, by introducing a repulsive background suggested by the chiral symmetry, and by applying a new method of Interfering Breit-Wigner Amplitudes. In this work we also show, reanalyzing the K\pi S-wave phase shift from a similar standpoint, an evidence for existence of \kappa(900), possibly to be a member of \sigma-nonet., Comment: tex with PTP style, 2 eps figures

Published
1997
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22. Further Analysis on \sigma-particle Properties

Author

Ishida, Shin, Ishida, Taku, Ishida, Muneyuki, Takamatsu, Kunio, and Tsuru, Tsuneaki

Subjects
High Energy Physics - Phenomenology
Abstract

In a previous work, we have reanalyzed the I=0 S-wave \pi\pi-scattering phase-shift through a new method of Interfering Breit-Wigner amplitudes, and have shown the existence of a light scalar, \sigma particle, accompanied by a negative "repulsive core"-type background phase-shift, whose origin may have some correspondence to a ``compensating'' \pi\pi contact interaction. In this work we make further analysis on the phase shift under KKbar threshold from the same standpoint, to determine precise values of \sigma mass and width, so far as present experimental data are concerned., Comment: Updated with recent progress

Published
1996
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23. Measurement of displacement cross section of structural materials utilized in the proton accelerator facilities with the kinematic energy above 400 MeV

Author

MEIGO Shin-ichiro, MATSUDA Hiroki, IWAMOTO Yosuke, YOSHIDA Makoto, HASEGAWA Shoichi, MAEKAWA Fujio, IWAMOTO Hiroki, NAKAMOTO Tatsushi, ISHIDA Taku, and MAKIMURA Shunsuke

Subjects
Physics, QC1-999
Abstract

For damage estimation of structural material in the accelerator facility, displacement per atom (DPA) is widely employed as an index of the damage calculated based on the displacement cross section obtained with the calculation model. Although the DPA is employed as the standard, the experimental data of displacement cross section are scarce for a proton in the energy region above 20 MeV. Among the calculation models, the difference exists about 8 times so that experimental data of the displacement cross section is crucial to validate the model. To obtain the displacement cross section, we conducted the experiment in J-PARC. As a preliminary result, the displacement cross section of copper was successfully obtained for 3-GeV proton. The present results showed that the widely utilized the Norgertt-Robinson-Torrens (NRT) model overestimates the cross section as suggested by the previous experiment for protons with lower energy.

Published
2020
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24. Diffuse Supernova Neutrino Background search at Super-Kamiokande with neutron tagging

Author

Giampaolo, Alberto, primary, El Hedri, Sonia, additional, Abe, Ko, additional, Bronner, Christophe, additional, Hayato, Yoshinari, additional, Hiraide, Katsuki, additional, Ikeda, Motoyasu, additional, Kameda, Jun, additional, Kanemura, Yuki, additional, Kataoka, Yousuku, additional, Miki, Shintaro, additional, Miura, Makoto, additional, Moriyama, Shigetaka, additional, Nagao, Yoshiki, additional, NAKAHATA, Masayuki, additional, Nakayama, Shoei, additional, Okamoto, Kohei, additional, Pronost, Guillaume, additional, Sekiya, Hiroyuki, additional, Shiozawa, Masato, additional, Sonoda, Yutaro, additional, Suzuki, Yoichiro, additional, Takeda, Atsushi, additional, Takemoto, Yasuhiro, additional, Takenaka, Akira, additional, TANAKA, HIDEKAZU, additional, Watanabe, Shuhei, additional, Yano, Takatomi, additional, Han, Seungho, additional, Kajita, Takaaki, additional, Okumura, Kimihiro, additional, Tashiro, Takuya, additional, Xia, Junjie, additional, Megias, Guillermo, additional, Labarga, Luis, additional, Marti, Lluis, additional, Zaldivar, Bryan, additional, Pointon, Barry W., additional, Kearns, Edward, additional, Raaf, Jennifer L., additional, Wan, Linyan, additional, Wester, Thomas, additional, Bian, Jianming, additional, Griskevich, Jeff N., additional, Kropp, William R., additional, Locke, Scott, additional, Mine, Shunichi, additional, Smy, Michael, additional, Sobel, Henry W., additional, Takhistov, Volodymyr, additional, Hill, James, additional, Kim, Jae Yool, additional, Lim, In Taek, additional, Park, Ryeong Gyoon, additional, Bodur, Baran, additional, Scholberg, Kate, additional, WALTER, CHRIS, additional, Bernard, Laura, additional, Coffani, Alice, additional, Drapier, Olivier, additional, Gonin, Michel, additional, Mueller, Thomas A., additional, Paganini, Pascal, additional, Quilain, Benjamin, additional, Ishizuka, Takeharu, additional, Nakamura, Taku, additional, Jang, Jae Seung, additional, Learned, John G., additional, Cao, Son, additional, Anthony, Lauren H.V., additional, Martin, Daniel, additional, Scott, Mark, additional, Sztuc, Artur A., additional, Uchida, Yoshi, additional, Berardi, Vincenzo, additional, Catanesi, Maria Gabriella, additional, Radicioni, Emilio, additional, Calabria, Nicola F., additional, Machado, Lucas Nascimento, additional, De Rosa, Gianfranca, additional, Collazuol, Gianmaria, additional, Iacob, Fabio, additional, Lamoureux, Mathieu, additional, Mattiazzi, Marco, additional, Ospina, Natalv, additional, Ludovici, Lucio, additional, Maekawa, Yuto, additional, Nishimura, Yasuhiro, additional, Friend, Megan, additional, Hasegawa, Takuya, additional, Ishida, Taku, additional, Kobayashi, Takashi, additional, Jakkapu, Mahesh, additional, Matsubara, Tsunayuki, additional, Nakadaira, Takeshi, additional, Nakamura, Kenzo, additional, Oyama, Yuichi, additional, SAKASHITA, Ken, additional, Sekiguchi, Tetsuro, additional, Tsukamoto, Toshifumi, additional, Boschi, Tommaso, additional, Di Lodovico, Francesca, additional, Gao, Jingyuan, additional, Migenda, Jost, additional, Taani, Mahdi, additional, Zsoldos, Stephane, additional, Nakano, Yuuki, additional, Ozaki, Hironori, additional, Suzuki, Atsumu, additional, Takeuchi, Yasuo, additional, Yamamoto, Shotaro, additional, Kotsar, Yurii, additional, Ali, Ajmi, additional, Feng, Jiahui, additional, Kikawa, Tatsuya, additional, Mori, Masamitsu, additional, Nakaya, Tsuyoshi, additional, Wendell, Roger, additional, Yasutome, Kenji, additional, Fernández, Pablo, additional, McCauley, Neil, additional, Mehta, Pruthvi, additional, Tsui, Ka Ming, additional, FUKUDA, Yoshiyuki, additional, Itow, Yoshitaka, additional, Menjo, Hiroaki, additional, Sato, Kazufumi, additional, Lagoda, Justyna, additional, Lakshmi, S. Mohan, additional, Mijakowski, Piotr, additional, Zalipska, Joanna, additional, Jiang, Junjie, additional, Jung, Chang K., additional, Vilela, Cristovao, additional, Wilking, Michael, additional, Yanagisawa, Chiaki, additional, Harada, Masayuki, additional, ISHINO, Hirokazu, additional, Ito, Shintaro, additional, Kitagawa, Hussain, additional, Koshio, Yusuke, additional, Ma, Wenjie, additional, Piplani, Nishtha, additional, Sakai, Seiya, additional, Barr, Giles, additional, Barrow, Danial, additional, Cook, Laurence, additional, Goldsack, Alexander, additional, Samani, Soniya, additional, Wark, David, additional, Nova, Federico, additional, Yang, Jeong Yeol, additional, Jenkins, Sam J., additional, Malek, Matthew, additional, McElwee, Jordan M., additional, Stone, Owen, additional, Thiesse, Matthew D., additional, Thompson, Lee F., additional, Okazawa, Hiroko, additional, Kim, Soo Bong, additional, Yu, Intae, additional, Ichikawa, Atsuko, additional, Nakamura, Kiseki, additional, Nishijima, Kyoshi, additional, Koshiba, Masatoshi, additional, Iwamoto, Konosuke, additional, Nakajima, Yasuhiro, additional, Ogawa, Natsumi, additional, Yokoyama, Masashi, additional, Martens, Kai, additional, Vagins, Mark, additional, Kuze, Masahiro, additional, Izumiyama, Shota, additional, Inomoto, Michitaka, additional, Ishitsuka, Masaki, additional, Ito, Hiroshi, additional, Kinoshita, Tatsushi, additional, Matsumoto, Ryo, additional, Shinoki, Masataka, additional, Suganuma, Takuto, additional, Martin, John Fraser, additional, Tanaka, Hirohisa, additional, Towstego, Trevor, additional, Akutsu, Ryosuke, additional, de Perio, Patrick, additional, Hartz, Mark, additional, Konaka, Akira, additional, Prouse, Nick, additional, Chen, Shaomin, additional, Xu, Benda D., additional, Posiadala-Zezula, Magdalena, additional, Hadley, David, additional, O'Flaherty, Marcus, additional, Richards, Benjamin, additional, Jamieson, Blair, additional, Walker, John, additional, Minamino, Akihiro, additional, Pintaudi, Ggiorgio, additional, Sano, Shiochi, additional, and Sasaki, Ryota, additional

Published
2021
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25. Low energy radioactivity BG model in Super-Kamiokande detector from SK-IV data

Author

Pronost, Guillaume, primary, Abe, Ko, additional, Bronner, Christophe, additional, Hayato, Yoshinari, additional, Hiraide, Katsuki, additional, Ikeda, Motoyasu, additional, Kameda, Jun, additional, Kanemura, Yuki, additional, Kataoka, Yousuku, additional, Miki, Shintaro, additional, Miura, Makoto, additional, Moriyama, Shigetaka, additional, Nagao, Yoshiki, additional, NAKAHATA, Masayuki, additional, Nakayama, Shoei, additional, Okamoto, Kohei, additional, Sekiya, Hiroyuki, additional, Shiozawa, Masato, additional, Sonoda, Yutaro, additional, Suzuki, Yoichiro, additional, Takeda, Atsushi, additional, Takemoto, Yasuhiro, additional, Takenaka, Akira, additional, TANAKA, HIDEKAZU, additional, Watanabe, Shuhei, additional, Yano, Takatomi, additional, Han, Seungho, additional, Kajita, Takaaki, additional, Okumura, Kimihiro, additional, Tashiro, Takuya, additional, Xia, Junjie, additional, Megias, Guillermo, additional, Labarga, Luis, additional, Marti, Lluis, additional, Zaldivar, Bryan, additional, Pointon, Barry W., additional, Kearns, Edward, additional, Raaf, Jennifer L., additional, Wan, Linyan, additional, Wester, Thomas, additional, Bian, Jianming, additional, Griskevich, N. Jeff, additional, Kropp, William R., additional, Locke, Scott, additional, Mine, Shunichi, additional, Smy, Michael, additional, Sobel, Henry W., additional, Takhistov, Volodymyr, additional, Hill, James, additional, Kim, Jae Yool, additional, Lim, In Taek, additional, Park, Ryeong Gyoon, additional, Bodur, Baran, additional, Scholberg, Kate, additional, WALTER, CHRIS, additional, Bernard, Laura, additional, Coffani, Alice, additional, Drapier, Olivier, additional, El Hedri, Sonia, additional, Giampaolo, Alberto, additional, Gonin, Michel, additional, Mueller, Thomas A., additional, Paganini, Pascal, additional, Quilain, Benjamin, additional, Ishizuka, Takeharu, additional, Nakamura, Taku, additional, Jang, Jae Seung, additional, Learned, John G., additional, Cao, Son, additional, Anthony, Lauren H.V., additional, Martin, Daniel, additional, Scott, Mark, additional, Sztuc, Artur A., additional, Uchida, Yoshi, additional, Berardi, Vincenzo, additional, Catanesi, Maria Gabriella, additional, Radicioni, Emilio, additional, Calabria, Nicola F., additional, Machado, Lucas Nascimento, additional, De Rosa, Gianfranca, additional, Collazuol, Gianmaria, additional, Iacob, Fabio, additional, Lamoureux, Mathieu, additional, Mattiazzi, Marco, additional, Ospina, Natalv, additional, Ludovici, Lucio, additional, Maekawa, Yuto, additional, Nishimura, Yasuhiro, additional, Friend, Megan, additional, Hasegawa, Takuya, additional, Ishida, Taku, additional, Kobayashi, Takashi, additional, Jakkapu, Mahesh, additional, Matsubara, Tsunayuki, additional, Nakadaira, Takeshi, additional, Nakamura, Kenzo, additional, Oyama, Yuichi, additional, SAKASHITA, Ken, additional, Sekiguchi, Tetsuro, additional, Tsukamoto, Toshifumi, additional, Boschi, Tommaso, additional, Di Lodovico, Francesca, additional, Gao, Jingyuan, additional, Migenda, Jost, additional, Taani, Mahdi, additional, Zsoldos, Stephane, additional, Nakano, Yuuki, additional, Ozaki, Hironori, additional, Suzuki, Atsumu, additional, Takeuchi, Yasuo, additional, Yamamoto, Shotaro, additional, Kotsar, Yurii, additional, Ali, Ajmi, additional, Feng, Jiahui, additional, Kikawa, Tatsuya, additional, Mori, Masamitsu, additional, Nakaya, Tsuyoshi, additional, Wendell, Roger, additional, Yasutome, Kenji, additional, Fernández, Pablo, additional, McCauley, Neil, additional, Mehta, Pruthvi, additional, Tsui, Ka Ming, additional, FUKUDA, Yoshiyuki, additional, Itow, Yoshitaka, additional, Menjo, Hiroaki, additional, Sato, Kazufumi, additional, Lagoda, Justyna, additional, Lakshmi, S. Mohan, additional, Mijakowski, Piotr, additional, Zalipska, Joanna, additional, Jiang, Junjie, additional, Jung, Chang K., additional, Vilela, Cristovao, additional, Wilking, Michael, additional, Yanagisawa, Chiaki, additional, Harada, Masayuki, additional, ISHINO, Hirokazu, additional, Ito, Shintaro, additional, Kitagawa, Hussain, additional, Koshio, Yusuke, additional, Ma, Wenjie, additional, Piplani, Nishtha, additional, Sakai, Seiya, additional, Barr, Giles, additional, Barrow, Danial, additional, Cook, Laurence, additional, Goldsack, Alexander, additional, Samani, Soniya, additional, Wark, David, additional, Nova, Federico, additional, Yang, Jeong Yeol, additional, Jenkins, Sam J., additional, Malek, Matthew, additional, McElwee, Jordan M., additional, Stone, Owen, additional, Thiesse, Matthew D., additional, Thompson, Lee F., additional, Okazawa, Hiroko, additional, Kim, Soo Bong, additional, Yu, Intae, additional, Ichikawa, Atsuko, additional, Nakamura, Kiseki, additional, Nishijima, Kyoshi, additional, Koshiba, Masatoshi, additional, Iwamoto, Konosuke, additional, Nakajima, Yasuhiro, additional, Ogawa, Natsumi, additional, Yokoyama, Masashi, additional, Martens, Kai, additional, Vagins, Mark, additional, Kuze, Masahiro, additional, Izumiyama, Shota, additional, Inomoto, Michitaka, additional, Ishitsuka, Masaki, additional, Ito, Hiroshi, additional, Kinoshita, Tatsushi, additional, Matsumoto, Ryo, additional, Shinoki, Masataka, additional, Suganuma, Takuto, additional, Martin, John Fraser, additional, Tanaka, Hirohisa, additional, Towstego, Trevor, additional, Akutsu, Ryosuke, additional, de Perio, Patrick, additional, Hartz, Mark, additional, Konaka, Akira, additional, Prouse, Nick, additional, Chen, Shaomin, additional, Xu, Benda D., additional, Posiadala-Zezula, Magdalena, additional, Hadley, David, additional, O'Flaherty, Marcus, additional, Richards, Benjamin, additional, Jamieson, Blair, additional, Walker, John, additional, Minamino, Akihiro, additional, Pintaudi, Ggiorgio, additional, Sano, Shiochi, additional, and Sasaki, Ryota, additional

Published
2021
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26. Follow-up of GWTC-2 gravitational wave events with neutrinos from the Super-Kamiokande detector

Author

Lamoureux, Mathieu, primary, Abe, Ko, additional, Bronner, Christophe, additional, Hayato, Yoshinari, additional, Hiraide, Katsuki, additional, Ikeda, Motoyasu, additional, Kameda, Jun, additional, Kanemura, Yuki, additional, Kataoka, Yousuku, additional, Miki, Shintaro, additional, Miura, Makoto, additional, Moriyama, Shigetaka, additional, Nagao, Yoshiki, additional, NAKAHATA, Masayuki, additional, Nakayama, Shoei, additional, Okamoto, Kohei, additional, Pronost, Guillaume, additional, Sekiya, Hiroyuki, additional, Shiozawa, Masato, additional, Sonoda, Yutaro, additional, Suzuki, Yoichiro, additional, Takeda, Atsushi, additional, Takemoto, Yasuhiro, additional, Takenaka, Akira, additional, TANAKA, HIDEKAZU, additional, Watanabe, Shuhei, additional, Yano, Takatomi, additional, Han, Seungho, additional, Kajita, Takaaki, additional, Okumura, Kimihiro, additional, Tashiro, Takuya, additional, Xia, Junjie, additional, Megias, Guillermo, additional, Labarga, Luis, additional, Marti, Lluis, additional, Zaldivar, Bryan, additional, Pointon, Barry W., additional, Kearns, Edward, additional, Raaf, Jennifer L., additional, Wan, Linyan, additional, Wester, Thomas, additional, Bian, Jianming, additional, Griskevich, N. Jeff, additional, Kropp, William R., additional, Locke, Scott, additional, Mine, Shunichi, additional, Smy, Michael, additional, Sobel, Henry W., additional, Takhistov, Volodymyr, additional, Hill, James, additional, Kim, Jae Yool, additional, Lim, In Taek, additional, Park, Ryeong Gyoon, additional, Bodur, Baran, additional, Scholberg, Kate, additional, WALTER, CHRIS, additional, Bernard, Laura, additional, Coffani, Alice, additional, Drapier, Olivier, additional, El Hedri, Sonia, additional, Giampaolo, Alberto, additional, Gonin, Michel, additional, Mueller, Thomas A., additional, Paganini, Pascal, additional, Quilain, Benjamin, additional, Ishizuka, Takeharu, additional, Nakamura, Taku, additional, Jang, Jae Seung, additional, Learned, John G., additional, Cao, Son, additional, Anthony, Lauren H.V., additional, Martin, Daniel, additional, Scott, Mark, additional, Sztuc, Artur A., additional, Uchida, Yoshi, additional, Berardi, Vincenzo, additional, Catanesi, Maria Gabriella, additional, Radicioni, Emilio, additional, Calabria, Nicola F., additional, Machado, Lucas Nascimento, additional, De Rosa, Gianfranca, additional, Collazuol, Gianmaria, additional, Iacob, Fabio, additional, Mattiazzi, Marco, additional, Ospina, Natalv, additional, Ludovici, Lucio, additional, Maekawa, Yuto, additional, Nishimura, Yasuhiro, additional, Friend, Megan, additional, Hasegawa, Takuya, additional, Ishida, Taku, additional, Kobayashi, Takashi, additional, Jakkapu, Mahesh, additional, Matsubara, Tsunayuki, additional, Nakadaira, Takeshi, additional, Nakamura, Kenzo, additional, Oyama, Yuichi, additional, SAKASHITA, Ken, additional, Sekiguchi, Tetsuro, additional, Tsukamoto, Toshifumi, additional, Boschi, Tommaso, additional, Di Lodovico, Francesca, additional, Gao, Jingyuan, additional, Migenda, Jost, additional, Taani, Mahdi, additional, Zsoldos, Stephane, additional, Nakano, Yuuki, additional, Ozaki, Hironori, additional, Suzuki, Atsumu, additional, Takeuchi, Yasuo, additional, Yamamoto, Shotaro, additional, Kotsar, Yurii, additional, Ali, Ajmi, additional, Feng, Jiahui, additional, Kikawa, Tatsuya, additional, Mori, Masamitsu, additional, Nakaya, Tsuyoshi, additional, Wendell, Roger, additional, Yasutome, Kenji, additional, Fernández, Pablo, additional, McCauley, Neil, additional, Mehta, Pruthvi, additional, Tsui, Ka Ming, additional, FUKUDA, Yoshiyuki, additional, Itow, Yoshitaka, additional, Menjo, Hiroaki, additional, Sato, Kazufumi, additional, Lagoda, Justyna, additional, Lakshmi, S. Mohan, additional, Mijakowski, Piotr, additional, Zalipska, Joanna, additional, Jiang, Junjie, additional, Jung, Chang K., additional, Vilela, Cristovao, additional, Wilking, Michael, additional, Yanagisawa, Chiaki, additional, Harada, Masayuki, additional, ISHINO, Hirokazu, additional, Ito, Shintaro, additional, Kitagawa, Hussain, additional, Koshio, Yusuke, additional, Ma, Wenjie, additional, Piplani, Nishtha, additional, Sakai, Seiya, additional, Barr, Giles, additional, Barrow, Danial, additional, Cook, Laurence, additional, Goldsack, Alexander, additional, Samani, Soniya, additional, Wark, David, additional, Nova, Federico, additional, Yang, Jeong Yeol, additional, Jenkins, Sam J., additional, Malek, Matthew, additional, McElwee, Jordan M., additional, Stone, Owen, additional, Thiesse, Matthew D., additional, Thompson, Lee F., additional, Okazawa, Hiroko, additional, Kim, Soo Bong, additional, Yu, Intae, additional, Ichikawa, Atsuko, additional, Nakamura, Kiseki, additional, Nishijima, Kyoshi, additional, Koshiba, Masatoshi, additional, Iwamoto, Konosuke, additional, Nakajima, Yasuhiro, additional, Ogawa, Natsumi, additional, Yokoyama, Masashi, additional, Martens, Kai, additional, Vagins, Mark, additional, Kuze, Masahiro, additional, Izumiyama, Shota, additional, Inomoto, Michitaka, additional, Ishitsuka, Masaki, additional, Ito, Hiroshi, additional, Kinoshita, Tatsushi, additional, Matsumoto, Ryo, additional, Shinoki, Masataka, additional, Suganuma, Takuto, additional, Martin, John Fraser, additional, Tanaka, Hirohisa, additional, Towstego, Trevor, additional, Akutsu, Ryosuke, additional, de Perio, Patrick, additional, Hartz, Mark, additional, Konaka, Akira, additional, Prouse, Nick, additional, Chen, Shaomin, additional, Xu, Benda D., additional, Posiadala-Zezula, Magdalena, additional, Hadley, David, additional, O'Flaherty, Marcus, additional, Richards, Benjamin, additional, Jamieson, Blair, additional, Walker, John, additional, Minamino, Akihiro, additional, Pintaudi, Ggiorgio, additional, Sano, Shiochi, additional, and Sasaki, Ryota, additional

Published
2021
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28. Irradiation damages of structural materials under different irradiation environments

Author

Wakai, Eiichi, primary, Takaya, Shigeru, additional, Matsui, Yoshinori, additional, Nagae, Yuji, additional, Kato, Shoichi, additional, Suzudo, Tomoaki, additional, Yamaguchi, Masataka, additional, Aoto, Kazumi, additional, Nogami, Shuhei, additional, Hasegawa, Akira, additional, Abe, Hiroaki, additional, Sato, Koichi, additional, Ishida, Taku, additional, Makimura, Shunsuke, additional, Hurh, Patrick G., additional, Ammigan, Kavin, additional, Senor, David J., additional, Casella, Andrew M., additional, and Edwards, Danny J., additional

Published
2021
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29. Tensile behavior of dual-phase titanium alloys under high-intensity proton beam exposure: Radiation-induced omega phase transformation in Ti-6Al-4V

Author

Ishida, Taku, primary, Wakai, Eiichi, additional, Makimura, Shunsuke, additional, Casella, Andrew M., additional, Edwards, Danny J., additional, Prabhakaran, Ramprashad, additional, Senor, David J., additional, Ammigan, Kavin, additional, Bidhar, Sujit, additional, Hurh, Patrick G., additional, Pellemoine, Frederique, additional, Densham, Christopher J., additional, Fitton, Michael D., additional, Bennett, Joe M., additional, Kim, Dohyun, additional, Simos, Nikolaos, additional, Hagiwara, Masayuki, additional, Kawamura, Naritoshi, additional, Meigo, Shin-ichiro, additional, and Yonehara, Katsuya, additional

Published
2020
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31. Measurement of Displacement Cross Section of Structural Materials Utilized in the Proton Accelerator Facilities with the Kinematic Energy above 400 MeV

Author

Meigo, Shin-ichiro, primary, Matsuda, Hiroki, additional, Iwamoto, Yosuke, additional, Yoshida, Makoto, additional, Hasegawa, Shoichi, additional, Maekawa, Fujio, additional, Iwamoto, Hiroki, additional, Nakamoto, Tatsushi, additional, Ishida, Taku, additional, and Makimura, Shunsuke, additional

Published
2020
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33. Introduction to the Proceedings

Author

Sato, Koichi, primary, Wakai, Eiichi, additional, Makimura, Shunsuke, additional, Saito, Shigeru, additional, Ishida, Taku, additional, Okubo, Nariaki, additional, Teshigawara, Makoto, additional, and Kikuchi, Kenji, additional

Published
2020
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34. Radiation Damage Studies on Titanium Alloys as High Intensity Proton Accelerator Beam Window Materials

Author

Ishida, Taku, primary, Wakai, Eiichi, additional, Makimura, Shunsuke, additional, Hurh, Patrick G., additional, Ammigan, Kavin, additional, Casella, Andrew M., additional, Edwards, Danny J., additional, Senor, David J., additional, Densham, Christopher J., additional, Fitton, Michael, additional, Bennett, Joe, additional, Kim, Dohyun, additional, Simos, Nikolaos, additional, Calviani, Marco, additional, and Torregrosa Martin, Claudio, additional

Published
2020
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35. Measurement of Displacement Cross-Section for Structural Materials in High-Power Proton Accelerator Facility

Author

Meigo, Shin-Ichiro, Hasegawa, Shyoichi, Hiroki, Iwamoto, Hiroki, Matsuda, Ishida, Taku, Iwamoto, Yosuke, Maekawa, Fujio, Makimura, Shunsuke, Makoto, Yoshida, and Nakamoto, Tatsushi

Subjects
U02 Materials Analysis and Modification, Physics::Accelerator Physics, 08 Applications of Accelerators, Tech Transfer and Industrial Relations, Nuclear Experiment, Accelerator Physics
Abstract

As the increase of beam power of hadron accelerators, the damage to target material is essential. For estimation of damage such as target material used at the facility, displacement per atom (DPA), calculated by the particle flux multiplied displacement cross-section with cascade mode, is widely employed as an index of the damage. Although the DPA is employed as the standard, the experimental data of displacement cross-section are scarce for a proton in the energy region above 20 MeV. A recent study reports that the displacement cross section of tungsten has 8 times difference among the calculation models. Therefore, experimental data of the displacement cross-section is crucial. The displacement cross-section can be obtained by observing the change of resistivity of the sample cooled by GM cooler to sustain the damage. The sample is placed in the vacuum chamber placed at upstream of the beam dump for 3 GeV and 30 GeV synchrotrons in J-PARC, where the sample will be irradiated by the proton in the energy range between 0.4 and 30 GeV. In the vast energy range, the displacement cross-section can be obtained for the proton, which will help to improve the damage estimation of the target material., Proceedings of the 9th Int. Particle Accelerator Conf., IPAC2018, Vancouver, BC, Canada

Published
2018
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50. Design of a Compact Fatigue Tester for Testing Irradiated Materials

Author

Hartsell, Brian, Campbell, Michael, Fitton, Michael, Hurh, Patrick, Ishida, Taku, and Nakadaira, Takeshi

Subjects
7: Accelerator Technology, Accelerator Physics
Abstract

A compact fatigue testing machine that can be easily inserted into a hot cell for characterization of irradiated materials is beneficial to help determine relative fatigue performance differences between new and irradiated material. Hot cell use has been carefully considered by limiting the size and weight of the machine, simplifying sample loading and test setup for operation via master-slave manipulator, and utilizing an efficient design to minimize maintenance. Funded from a US-Japan collaborative effort, the machine has been specifically designed to help characterize titanium material specimens. These specimens are flat cantilevered beams for initial studies, possibly utilizing samples irradiated at other sources of beam. The option to test spherically shaped samples cut from the T2K vacuum window is also available. The machine is able to test a sample to 10⁷ cycles in under a week, with options to count cycles and sense material failure. The design of this machine will be presented along with current status., Proceedings of the 6th Int. Particle Accelerator Conf., IPAC2015, Richmond, VA, USA

Published
2015
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