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52. Target of opportunity observations of blazars with the MAGIC telescope

Author

Lindfors, Elina J., Mazin, Daniel, Hayashida, Masaaki, Majumdar, Pratik, Teshima, Masahiro, Lahteenmaki, Anne, Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Institut de Fisica d'Altes Energies (IFAE), Kavli Institute for particle Astrophysics and Cosmology (KIPAC), Stanford Linear Accelerator Center, Deutsches Elektronen-Synchrotron (DESY), Max-Planck-Institut fur Physik, and Metsahovi Radio Observatory, Helsinki University of Technology (TKK)

Subjects
gamma-rays : observations - galaxies : active
Abstract

Astrophysics with All-Sky X-Ray observations: 3rd International MAXI Workshop (RIKEN, 10-12 June 2008), The MAGIC collaboration has been performing Target of Opportunity observations of blazars, when seen flaring in the optical by the Tuorla blazar monitoring program. In the past three years, there have been 5 optical alerts during good weather conditions and reasonable declination of the source. Three alerts have resulted in discoveries of VHE gamma-rays from previously undetected sources. In this paper we discuss the discovered sources, MAGIC observations of BL Lac and 3C 279, and we give an outlook for ToO observations of blazars with MAGIC in the MAXI era., Physical characteristics: Original contains color illustrations, Elina J. Lindfors, Daniel Mazin, Masaaki Hayashida, Pratik Majumdar, Masahiro Teshima on behalf of the MAGIC Collaboration --As author, 資料番号: AA0064306059, レポート番号: JAXA-SP-08-014E

Published
2009

54. MAGIC detection of short-term variability of the high-peaked BL Lac object 1ES 0806+524

Author

Aleksić, Jelena, Ansoldi, Stefano, Antonelli, Lucio A., Antoranz, Pedro, Babić, Ana, Bangale, Priyadarshini, Barrio, Juan A., Becerra González, Josefa, Bednarek, Włodzimierz, Bernardini, Elisa, Biasuzzi, Barbara, Biland, Adrian, Blanch, Oscar, Bonnefoy, Simon, Bonnoli, Giacomo, Borracci, F., Bretz, Thomas, Carmona, Emiliano, Carosi, Alessandro, Colin, Pierre, Colombo, E., Contreras, José L., Covino, Stefano, Da Vela, Paolo, Dazzi, Francesco, De Angelis, Alessandro, De Caneva, Gessica, De Lotto, Barbara, de Ona Wilhelmi, Emma, Delgado Mendez, C., Di Pierro, Federico, Dominis Prester, D., Dorner, Daniela, Doro, Michele, Einecke, Sabrina, Eisenacher, Dorit, Elsäesser, Dominik, Fernández Barral, Alba, Fidalgo, David Carreto, Fonseca Gonzalez, María Victoria, Font, Lluís, Frantzen, Katharina, Fruck, Christian, García Łópez, Ramón J., Garczarczyk, Markus, Garrido Terrats, D., Gaug, Markus, Godinović, Nikola, González Muñoz, A., Gozzini, Sara R., Hadasch, Daniela, Hanabata, Yoshitaka, Hayashida, Masaaki, Hose, Juergen, Hrupec, Dario, Idec, W., Kadenius, Ville, Kellermann, Hanna, Knoetig, Max L., Kodani, Kazuhito, Konno, Yusuke, Krause, Julian, Kubo, Hidetoshi, Kushida, J., La Barbera, Antonino, Lelas, Damir, Lewandowska, Natalia, Lindfors, Elina, Lombardi, Saverio, Longo, Francesco, López Moya, Marcos, López-Coto, Rubén, López-Oramas, Alicia, Lorenz, Eckhart, Lozano, I., Makariev, M., Mallot, K., Maneva, Galina, Mannheim, Karl, Maraschi, Laura, Maríotti, Mosé, Martínez, Manel I., Mazin, Daniel, Menzel, Uta, Miranda, José M., Mirzoyan, Razmik, Moralejo, Abelardo, Munar-Adrover, Pere, Nakajima, Daisuke, Neustroev, Vitaly, Niedźwiecki, Andrzej, Nievas Rosillo, Mireia, Nilsson, Kari, Nishijima, Kyoshi, Noda, Koji, Orito, Reiko, Overkemping, A.K., Paiano, Simona, Palatiello, Michele, Paneque, David, Paoletti, Riccardo, Paredes, Josep M., Paredes-Fortuny, Xavier, Persic, Massimo, Poutanen, Juri, Prada Moroni, Pier G., Prandini, Elisa, Puljak, Ivica, Reinthal, Riho, Rhode, Wolfgang, Ribó, Marc, Rico, Javier, Rodriguez Garcia, J., Saito, Takayuki Y., Saito, Koji, Satalecka, Konstancja, Scalzotto, Villi, Scapin, Valeria, Schultz, Cornelia, Schweizer, Thomas, Shore, Steven N., Sillanpää, Aimo K., Sitarek, Julian, Šnidarić, I., Sobczyńska, Dorota, Stamerra, Antonio, Steinbring, T., Strzys, Marcel C., Takalo, Leo, Takami, Hajime, Tavecchio, Fabrizio, Terzić, Tomislav, Tescaro, Diego, Teshima, Masahiro, Thaele, Julia, Torres, Diego F., Toyama, Takeshi, Treves, Aldo, Vogler, Patrick, Will, Martin, Zanin, Roberta, Berger, Karsten, Buson, Sara, D'Ammando, Filippo, Gasparrini, Dario, Hovatta, Talvikki, Max-Moerbeck, Walter, and Readhead, Anthony C.S.

Subjects
Radiation mechanisms: non-thermal, Galaxies: jets, BL Lacertae objects: individual: 1ES 0806+524, Galaxies: active, non-thermal, Gamma-rays: galaxies [Radiation mechanisms], Gamma-rays: galaxies
Abstract

Monthly Notices of the Royal Astronomical Society, 451 (1), ISSN:0035-8711, ISSN:1365-2966, ISSN:1365-8711

Published
2015
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55. The Arrival Direction Distribution of Extremely High Energy Cosmic Rays Observed by AGASA

Author

Teshima, Masahiro, Takeda, Masahiro, Chikawa, Michiyuki, Fukushima, Masaki, Hayashida, Naoaki, Honda, Ken, Inoue, Naoya, Kadota, Kenji, Kakimoto, Fumio, Kamata, Kouichi, Kawaguchi, Setsuo, Kawakami, Saburo, Kawasaki, Yoshiya, Kawasumi, Norio, Mase, Keiichi, Mizobuchi, Tomoko, Nagano, Motohiko, Ohoka, Hideyuki, Osone, Satoko, Sakaki, Naoto, Sakurai, Nobuyuki, Sasaki, Makoto, Sasano, Masahiko, Shimizu, Hirohiko, Shinozaki, Kenji, Torii, Reiko, Tsushima, Itsurou, Uchihori, Yukio, Yamamoto, Tokonatsu, Yoshida, Shigeru, and Yoshii, Hisashi

Abstract

Study of the arrival direction distribution plays a key role in finding sources of the Extremely High Energy Cosmic Rays (EHECR). Greisen-Zatsepin-Kuz'min (GZK) mechanism limits the propagation of EHE cosmic rays significantly and only nearby sources can contribute to the local EHECR flux. Furthermore EHECRs travel intergalactic spaces almost linearly. Hence, we expect they can be traced back to their sources. Here we report a small-sacle anisotropy of the arrival direction distribution of EHECRs observed by AGASA above 1019eV . This result strongly suggests the existence of point sources of EHECRs.

Published
2003

56. Energy Determination in the Akeno Giant Air Shower Array Experiment

Author

Takeda, Masahiro, Sakaki, Naoto, Chikawa, Michiyuki, Fukushima, Masaki, Hayashida, Naoaki, Honda, Ken, Inoue, Naoya, Kadota, Kenji, Kakimoto, Fumio, Kamata, Kouichi, Kawaguchi, Setsuo, Kawakami, Saburo, Kawasaki, Yoshiya, Kawasumi, Norio, Mase, Keiichi, Mizobuchi, Tomoko, Nagano, Motohiko, Ohoka, Hideyuki, Osone, Satoko, Sakurai, Nobuyuki, Sasaki, Makoto, Sasano, Masahiko, Shimizu, Hirohiko, Shinozaki, Kenji, Teshima, Masahiro, Torii, Reiko, Tsushima, Itsurou, Uchihori, Yukio, Yamamoto, Tokonatsu, Yoshida, Shigeru, and Yoshii, Hisashi

Subjects
Astrophysics::High Energy Astrophysical Phenomena
Abstract

Using data from more than ten-years of observations with the Akeno Giant Air Shower Array (AGASA), we published that the energy spectrum of ultra-high energy cosmic rays extends beyond the GZK cutoff. We have reevaluated the energy determination method used for AGASA events with respect to various factors. The currently assigned energies of AGASA events have an accuracy of +-25% in event-reconstruction resolution and +-18% in systematic errors around 10^20eV. This systematic uncertainty is independent of primary energy above 10^19eV.

Published
2003

57. Chemical Composition of Ultra-High Energy Cosmic Rays Observed by AGASA

Author

Shinozaki, Kenji, Chikawa, Michiyuki, Fukushima, Masaki, Hayashida, Naoaki, Honda, Ken, Inoue, Naoya, Kadota, Kenji, Kakimoto, Fumio, Kamata, Kouichi, Kawaguchi, Setsuo, Kawakami, Saburo, Kawasaki, Yoshiya, Kawasumi, Norio, Mase, Keiichi, Mizobuchi, Tomoko, Nagano, Motohiko, Ohoka, Hideyuki, Osone, Satoko, Sakaki, Naoto, Sakurai, Nobuyuki, Sasaki, Makoto, Sasano, Masahiko, Shimizu, Hirohiko, Takeda, Masahiro, Teshima, Masahiro, Torii, Reiko, Tsushima, Itsurou, Uchihori, Yukio, Yamamoto, Tokonatsu, Yoshida, Shigeru, and Yoshii, Hisashi

Subjects
Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment
Abstract

We have observed ultra-high energy cosmic rays above the Greisen-Zatsepin-Kuz'min cut-off energy by Akeno Giant Air Shower Array. Their chemical composition is a key discriminator of origin models. In the present work, we estimate the average composition by an analysis of muons in air showers with AIRES+QGSJET simulation. The data matches the prediction for light hadron primaries and no indication has been found for a gamma-ray dominance.

Published
2003

58. UPPER LIMIT ON GAMMA-RAY FLUX ABOVE 1019 eV ESTIMATED BY THE AKENO GIANT AIR SHOWER ARRAY EXPERIMENT

Author

Shinozaki, Kenji, Chikawa, Michiyuki, Fukushima, Masaki, Hayashida, Naoaki, Inoue, Naoya, Honda, Ken, Kadota, Kenji, Kakimoto, Fumio, Kamata, Kouichi, Kawaguchi, Setsuo, Kawakami, Saburo, Kawasaki, Yoshiya, Kawasumi, Norio, Mahrous, A, Mase, Keiichi, Mizobuchi, Tomoko, Morizane, Yuichirou, Nagano, Motohiko, Ohoka, Hideyuki, Osone, Satoko, Sakaki, Naoto, Sakurai, Nobuyuki, Sasaki, Makoto, Sasano, Masahiko, Takeda, Masahiro, Teshima, Masahiro, Tsushima, Itsurou, Torii, Reiko, Uchihori, Yukio, Vazquez, R, Yamamoto, Tokonatsu, Yoshida, Shigeru, and Yoshii, Hisashi

Subjects
Astrophysics::High Energy Astrophysical Phenomena
Abstract

The origin of the highest energy cosmic rays (−1020 eV) is not well understood. Interesting models called ＾top-down￣ scenarios have been proposed to explain the origin. The g-ray flux in ultra?high-energy cosmic rays is a key parameter for giving constraints on such models. To study the properties of g-ray showers, we carry out simulation studies that take into account both the Landau-Pomeranchuk-Migdal effect and electromagnetic interactions in the geomagnetic field. Based on an analysis of muons in air showers observed by the Akeno Giant Air Shower Array, the upper limits on the g-ray flux are estimated to be 28% above 1019 eV and 67% above 1019.5 eV in the observed air showers at a confidence level of 95%. Above 1020 eV, the primary composition is in agreement with an extrapolation from lower energies, and there is no indication that the observed events are mostly g-ray showers. These results provide observational constraints for origin models up to the highest energies.

Published
2002

59. A search for horizontal air showers induced by extremely high energy cosmic neutrinos observed by Akeno Giant Air Shower Array

Author

Yoshida, Shigeru, Sakaki, Naoto, Chikawa, Michiyuki, Fukushima, Masaki, Hayashida, Naoaki, Honda, Ken, Inoue, Naoya, Kadota, Kenji, Kakimoto, Fumio, Kamata, Kouichi, Kawaguchi, Setsuo, Kawakami, Saburo, Kawasaki, Yoshiya, Kawasumi, Norio, Mahrous, A, Mase, Keiichi, Mizobuchi, Tomoko, Morizane, Yuichirou, Ohoka, Hideyuki, Osone, Satoko, Sakurai, Nobuyuki, Sasaki, Makoto, Sasano, Masahiko, Shinozaki, Kenji, Takeda, Masahiro, Teshima, Masahiro, Torii, Reiko, Tsushima, Itsurou, Uchihori, Yukio, Yamamoto, Tokonatsu, and Yoshii, Hisashi

Published
2001

60. Clusters of Cosmic Rays above 10^19eV observed with AGASA

Author

Takeda, Masahiro, Chikawa, Michiyuki, Fukushima, Masaki, Hayashida, Naoaki, Honda, Ken, Inoue, Naoya, Kadota, Kenji, Kakimoto, Fumio, Kamata, Kouichi, Kawaguchi, Setsuo, Kawakami, Saburo, Kawasaki, Yoshiya, Kawasumi, Norio, Kusano, Erina, Mahrous, A, Mase, Keiichi, Mizobuchi, Tomoko, Morizane, Yuichirou, Nagano, Motohiko, Ohoka, Hideyuki, Osone, Satoko, Sakaki, Naoto, Sakurai, Nobuyuki, Sasaki, Makoto, Sasano, Masahiko, Shinozaki, Kenji, Teshima, Masahiro, Torii, Reiko, Tsushima, Itsurou, Uchihori, Yukio, Yamamoto, Tokonatsu, Yoshida, Shigeru, and Yoshii, Hisashi

Published
2001

61. Properties of EHE gamma-ray initiated air showers and their search by AGASA

Author

Shinozaki, Kenji, Chikawa, Michiyuki, Fukushima, Masaki, Hayashida, Naoaki, Honda, Ken, Inoue, Naoya, Kadota, Kenji, Kakimoto, Fumio, Kamata, Kouichi, Kawaguchi, Setsuo, Kawakami, Saburo, Kawasaki, Yoshiya, Kawasumi, Norio, Kusano, Erina, Mahrous, A, Mase, Keiichi, Mizobuchi, Tomoko, Morizane, Yuichirou, Nagano, Motohiko, Ohoka, Hideyuki, Osone, Satoko, Sakaki, Naoto, Sasaki, Makoto, Sasano, Masahiko, Takeda, Masahiro, Teshima, Masahiro, Torii, Reiko, Tsushima, Itsurou, Uchihori, Yukio, Yamamoto, Tokonatsu, Yasui, Kenji, Yoshida, Shigeru, and Yoshii, Hisashi

Published
2001

62. Energy spectrum above 3 x 10^18 eV observed with AGASA

Author

Sakaki, Naoto, Chikawa, Michiyuki, Fukushima, Masaki, Hayashida, Naoaki, Honda, Ken, Inoue, Naoya, Kadota, Kenji, Kakimoto, Fumio, Kamata, Kouichi, Kawaguchi, Setsuo, Kawakami, Saburo, Kawasaki, Yoshiya, Kawasumi, Norio, Kusano, Erina, Mahrous, A, Mase, Keiichi, Mizobuchi, Tomoko, Morizane, Yuichirou, Nagano, Motohiko, Ohoka, Hideyuki, Osone, Satoko, Sakurai, Nobuyuki, Sasaki, Makoto, Sasano, Masahiko, Shinozaki, Kenji, Takeda, Masahiro, Teshima, Masahiro, Torii, Reiko, Tsushima, Itsurou, Uchihori, Yukio, Yamamoto, Tokonatsu, Yoshida, Shigeru, and Yoshii, Hisashi

Published
2001

63. Muon component in giant air showers with energies greater than 10^18.5eV observed by AGASA

Author

Inoue, Naoya, Chikawa, Michiyuki, Fukushima, Masaki, Hayashida, Naoaki, Honda, Ken, Kadota, Kenji, Kakimoto, Fumio, Kakizawa, Shinichi, Kamata, Kouichi, Kawaguchi, Setsuo, Kawakami, Saburo, Kawasaki, Yoshiya, Kawasumi, Norio, Kusano, Erina, Mahrous, A, Mase, Keiichi, Minagawa, Takahiro, Morizane, Yuichirou, Nagano, Motohiko, Ohoka, Hideyuki, Osone, Satoko, Sakaki, Naoto, Sasaki, Makoto, Sasano, Masahiko, Shinozaki, Kenji, Takeda, Masahiro, Teshima, Masahiro, Torii, Reiko, Tsushima, Itsurou, Uchihori, Yukio, Yamamoto, Tokonatsu, Yasui, Kenji, Yoshida, Shigeru, Yoshii, Hisashi, and Yoshikoshi, Takanori

Published
2001

64. Anisotropy of cosmic-ray arrival direction at 10^18eV observed by AGASA

Author

Chikawa, Michiyuki, Fukushima, Masaki, Hayashida, Naoaki, Honda, Ken, Inoue, Naoya, Kadota, Kenji, Kakimoto, Fumio, Kakizawa, Shinichi, Kamata, Kouichi, Kawaguchi, Setsuo, Kawakami, Saburo, Kawasaki, Yoshiya, Kawasumi, Norio, Kusano, Erina, Mahrous, A, Mase, Keiichi, Minagawa, Takahiro, Morizane, Yuichirou, Nagano, Motohiko, Ohoka, Hideyuki, Osone, Satoko, Sakaki, Naoto, Sasaki, Makoto, Sasano, Masahiko, Shinozaki, Kenji, Takeda, Masahiro, Teshima, Masahiro, Torii, Reiko, Tsushima, Itsurou, Uchihori, Yukio, Yamamoto, Tokonatsu, Yoshida, Shigeru, Yasui, Kenji, Yoshii, Hisashi, and Yoshikoshi, Takanori

Published
2001

65. Energy estimation of AGASA events

Author

Sakaki, Naoto, Chikawa, Michiyuki, Fukushima, Masaki, Hayashida, Naoaki, Honda, Ken, Inoue, Naoya, Kadota, Kenji, Kakimoto, Fumio, Kamata, Kouichi, Kawaguchi, Setsuo, Kawakami, Saburo, Kawasaki, Yoshiya, Kawasumi, Norio, Kusano, Erina, Mahrous, A, Mase, Keiichi, Mizobuchi, Tomoko, Morizane, Yuichirou, Nagano, Motohiko, Ohoka, Hideyuki, Osone, Satoko, Sakurai, Nobuyuki, Sasaki, Makoto, Sasano, Masahiko, Shinozaki, Kenji, Takeda, Masahiro, Teshima, Masahiro, Torii, Reiko, Tsushima, Itsurou, Uchihori, Yukio, Yamamoto, Tokonatsu, Yoshida, Shigeru, and Yoshii, Hisashi

Published
2001

66. The Optical system for the Large Size Telescope of the Cherenkov Telescope Array

Author

Hayashida, Masaaki, primary, Noda, Koji, additional, Teshima, Masahiro, additional, Barres de Almeida, Ulisses, additional, Chikawa, Michi, additional, Cho, Norihito, additional, Fukami, Satoshi, additional, GADOLA, Arno, additional, Hanabata, Yoshitaka, additional, Horns, Dieter, additional, Jablonski, C., additional, Katagiri, Hideaki, additional, Kagaya, Mika, additional, Ogino, Momoko, additional, Okumura, Akira, additional, Saito, Takayuki, additional, Stadler, R., additional, Steiner, Stefan, additional, Straumann, Ulrich, additional, Vollhardt, Achim, additional, Wetteskind, Holger, additional, Yamamoto, Tokonatsu, additional, and Yoshida, Tatsuo, additional

Published
2016
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67. Development of the photomultiplier tube readout system for the first Large-Sized Telescope of the Cherenkov Telescope Array

Author

Masuda, Shu, primary, Konno, Yusuke, additional, Barrio, Juan Abel, additional, Blanch Bigas, Oscar, additional, Delgado, Carlos, additional, Freixas, Lluis, additional, Gunji, Shuichi, additional, Hadasch, Daniela, additional, Hatanaka, Kenichiro, additional, Ikeno, Masahiro, additional, Illa Laguna, Jose Maria, additional, Inome, Yusuke, additional, Ishio, Kazuma, additional, Katagiri, Hideaki, additional, Kubo, Hidetoshi, additional, Martínez, Gustavo, additional, Mazin, Daniel, additional, Nakajima, Daisuke, additional, Nakamori, Takeshi, additional, Ohoka, Hideyuki, additional, Paoletti, Riccardo, additional, Ritt, Stefan, additional, Rugliancich, Andrea, additional, Saito, Takayuki, additional, Sulanke, K. -H., additional, Takeda, Junki, additional, Tanaka, Manobu, additional, Tanigawa, Shunsuke, additional, Tejedor, Luis Ángel, additional, Teshima, Masahiro, additional, Tsuchiya, Yugo, additional, Uchida, Tomohisa, additional, and Yamamoto, Tokonatsu, additional

Published
2016
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69. Recent follow-up observations of GRBs in the very high energy band with the MAGIC Telescopes

Author

Carosi, Alessandro, primary, Antonelli, Antonella, additional, Becerra Gonzalez, Josefa, additional, Berti, Alessio, additional, Covino, Stefano, additional, Garczarczyk, Markus, additional, Gaug, Markus, additional, Lombardi, Saverio, additional, Longo, F., additional, Moretti, Elena, additional, Noda, Koji, additional, Peresano, Michele, additional, Nogués, Leyre, additional, Teshima, Masahiro, additional, Persic, Massimo, additional, and Toyama, Takeshi, additional

Published
2016
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72. Target of opportunity observations of blazars with the MAGIC telescope

Author

Lindfors, Elina J., Mazin, Daniel, 林田, 将明, Hayashida, Masaaki, Majumdar, Pratik, 手嶋, 政廣, Teshima, Masahiro, Lahteenmaki, Anne, Lindfors, Elina J., Mazin, Daniel, 林田, 将明, Hayashida, Masaaki, Majumdar, Pratik, 手嶋, 政廣, Teshima, Masahiro, and Lahteenmaki, Anne

Abstract

The MAGIC collaboration has been performing Target of Opportunity observations of blazars, when seen flaring in the optical by the Tuorla blazar monitoring program. In the past three years, there have been 5 optical alerts during good weather conditions and reasonable declination of the source. Three alerts have resulted in discoveries of VHE gamma-rays from previously undetected sources. In this paper we discuss the discovered sources, MAGIC observations of BL Lac and 3C 279, and we give an outlook for ToO observations of blazars with MAGIC in the MAXI era., Original contains color illustrations, Meeting Information: Astrophysics with All-Sky X-Ray observations: 3rd International MAXI Workshop (RIKEN, 10-12 June 2008), "Elina J. Lindfors, Daniel Mazin, Masaaki Hayashida, Pratik Majumdar, Masahiro Teshima on behalf of the MAGIC Collaboration" --As author

Published
2015

74. Science of Extreme Light Infrastructure

Author

Tajima, Toshiki, Barish, Barry C., Barty, C. P., Bulanov, Sergei, Chen, Pisin, Feldhaus, Josef, Hajdu, Janos, Keitel, Christoph H., Kieffer, Jean-Claude, Ko, Do-Kyeong, Leemans, Wim, Normand, Didier, Palumbo, Luigi, Rzazewski, Kazimierz, Sergeev, Alexander, Sheng, Zheng-Ming, Takasaki, Fumihiko, Teshima, Masahiro, Comm, ELI Sci Advisory, Tajima, Toshiki, Barish, Barry C., Barty, C. P., Bulanov, Sergei, Chen, Pisin, Feldhaus, Josef, Hajdu, Janos, Keitel, Christoph H., Kieffer, Jean-Claude, Ko, Do-Kyeong, Leemans, Wim, Normand, Didier, Palumbo, Luigi, Rzazewski, Kazimierz, Sergeev, Alexander, Sheng, Zheng-Ming, Takasaki, Fumihiko, Teshima, Masahiro, and Comm, ELI Sci Advisory

Abstract

The infrastructure of Extreme Light Infrastructure (ELI) provides an unprecedented opportunity for a broad range of frontier science. Its highest ever intensity of lasers, as well as high fluence, high power, and/or ultrafast optical characteristics carve out new territories of discovery, ranging from attosecond science to photonuclear science, laser acceleration and associated beams, and high field science (Four Pillars of ELI). Its applications span from medicine, biology, engineering, energy, chemistry, physics, and fundamental understanding of the Universe. The relativistic optics that intense lasers have begun exploring may be extended into a new regime of ultra-relativistic regime, where even protons fly relativistically in the optical fields. ELI provides the highest intensity to date such that photon fields begin to feel even the texture of vacuum. This is a singular appeal of ELI with its relatively modest infrastructure (compared to the contemporary largest scientific infrastructures), yet provides an exceptional avenue along which the 21(st) Century science and society need to answer the toughest questions. The intensity frontier simultaneously brings in the energy horizon (TeV and PeV) as well as temporal frontier (attoseconds and zeptoseconds). It also turns over optics of atoms and molecules into that of nuclei with the ability to produce monoenergetic collimated gamma-ray photons. As such, the ELI concept acutely demands an effort to encompass and integrate its Four Pillars., 1st International Conference on Light at Extreme Intensities (LEI 2009), Brasov, ROMANIA, OCT 16-21, 2009

Published
2010
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75. Gamma-ray burst science in the era of the Cherenkov Telescope Array

Author

Inoue, Susumu, primary, Granot, Jonathan, additional, O’Brien, Paul T., additional, Asano, Katsuaki, additional, Bouvier, Aurelien, additional, Carosi, Alessandro, additional, Connaughton, Valerie, additional, Garczarczyk, Markus, additional, Gilmore, Rudy, additional, Hinton, Jim, additional, Inoue, Yoshiyuki, additional, Ioka, Kunihito, additional, Kakuwa, Jun, additional, Markoff, Sera, additional, Murase, Kohta, additional, Osborne, Julian P., additional, Otte, A. Nepomuk, additional, Starling, Rhaana, additional, Tajima, Hiroyasu, additional, Teshima, Masahiro, additional, Toma, Kenji, additional, Wagner, Stefan, additional, Wijers, Ralph A.M.J., additional, Williams, David A., additional, Yamamoto, Tokonatsu, additional, and Yamazaki, Ryo, additional

Published
2013
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79. Science of Extreme Light Infrastructure

Author

Tajima, Toshiki, primary, Barish, Barry C., additional, Barty, C. P., additional, Bulanov, Sergei, additional, Chen, Pisin, additional, Feldhaus, Josef, additional, Hajdu, Janos, additional, Keitel, Christoph H., additional, Kieffer, Jean-Claude, additional, Ko, Do-Kyeong, additional, Leemans, Wim, additional, Normand, Didier, additional, Palumbo, Luigi, additional, Rzazewski, Kazimierz, additional, Sergeev, Alexander, additional, Sheng, Zheng-Ming, additional, Takasaki, Fumihiko, additional, Teshima, Masahiro, additional, and Dumitras, Dan, additional

Published
2010
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80. Suzaku and Multi-Wavelength Observations of OJ 287 during the Periodic Optical Outburst in 2007

Author

Seta, Hiromi, primary, Isobe, Naoki, additional, Tashiro, Makoto S., additional, Yaji, Yuichi, additional, Arai, Akira, additional, Fukuhara, Masayuki, additional, Kohno, Kotaro, additional, Nakanishi, Kouichiro, additional, Sasada, Mahito, additional, Shimajiri, Yoshito, additional, Tosaki, Tomoka, additional, Uemura, Makoto, additional, Anderhub, Hans, additional, Antonelli, Lucio Angelo, additional, Antoranz, Pedro, additional, Backes, Michael, additional, Baixeras, Carmen, additional, Balestra, Silvia, additional, Barrio, Juan Abel, additional, Bastieri, Denis, additional, González, Josefa Becerra, additional, Becker, Julia K., additional, Bednarek, Wodzimierz, additional, Berger, Karsten, additional, Bernardini, Elisa, additional, Biland, Adrian, additional, Bock, Rudolf K., additional, Bonnoli, Giacomo, additional, Bordas, Pol, additional, Tridon, Daniela Borla, additional, Bosch-Ramon, Valenti, additional, Bose, Debanjan, additional, Braun, Isabel, additional, Bretz, Thomas, additional, Britvitch, Ilia, additional, Camara, Miguel, additional, Carmona, Emiliano, additional, Commichau, Sebastian, additional, Contreras, José Luis, additional, Cortina, Juan, additional, Dios, Ma Teresa Costado, additional, Covino, Stefano, additional, Curtef, Valentin, additional, Dazzi, Francesco, additional, DeAngelis, Alessandro, additional, DelPozo, Elsa De Cea, additional, DelosReyes, Raquel, additional, DeLotto, Barbara, additional, DeMaria, Michela, additional, DeSabata, Francesco, additional, Méndez, Carlos Delgado, additional, Domínguez, Alberto, additional, Dorner, Daniela, additional, Doro, Michele, additional, Elsaesser, Dominik, additional, Errando, Manel, additional, Ferenc, Daniela, additional, Fernández, Enrique, additional, Firpo, Roger, additional, Fonseca, Maria Victoria, additional, Font, Lluis, additional, Galante, Nicola, additional, GarcíaLópez, Ramon J., additional, Garczarczyk, Markus, additional, Gaug, Markus, additional, Goebel, Florian, additional, Hadasch, Daniela, additional, Hayashida, Masaaki, additional, Herrero, Artemio, additional, Hildebrand, Dorothée, additional, Höhne-Mönch, Daniel, additional, Hose, Jürgen, additional, Hsu, Ching Cheng, additional, Jogler, Tobias, additional, Kranich, Daniel, additional, Barbera, Antonio La, additional, Laille, Alvin, additional, Leonardo, Elvira, additional, Lindfors, Elina, additional, Lombardi, Saverio, additional, Longo, Francesco, additional, López, Donatella, additional, Lorenz, Eckart, additional, Majumdar, Pratik, additional, Maneva, Galina, additional, Mankuzhiyil, Nijil, additional, Mannheim, Karl, additional, Maraschi, Laura, additional, Mariotti, Mosé, additional, Martínez, Manel, additional, Mazin, Daniel, additional, Meucci, Mario, additional, Meyer, Markus, additional, Miranda, Jose Miguel, additional, Mirzoyan, Razmick, additional, Miyamoto, Hiroko, additional, Moldón, Javier, additional, Moles, Mariano, additional, Moralejo, Abelardo, additional, Nieto, Daniel, additional, Nilsson, Kari, additional, Ninkovic, Jelena, additional, Otte, Nepomuk, additional, Oya, Igor, additional, Paoletti, Riccardo, additional, Paredes, Josep M., additional, Pasanen, Mikko, additional, Pascoli, Donatella, additional, Pauss, Felicitas, additional, Pegna, Raffaello G., additional, Perez-Torres, Miguel A., additional, Persic, Massimo, additional, Peruzzo, Luigi, additional, Prada, Francisco, additional, Prandini, Elisa, additional, Puchades, Neus, additional, Reichardt, Ignasi, additional, Rhode, Wolfgang, additional, Ribó, Marc, additional, Rico, Javier, additional, Rissi, Michael, additional, Robert, Arnau, additional, Rügamer, Stefan, additional, Saggion, Antonio, additional, Saito, Takayuki Y., additional, Salvati, Marco, additional, Sánchez-Conde, Miguel, additional, Satalecka, Konstancja, additional, Scalzotto, Villi, additional, Scapin, Valeria, additional, Schweizer, Thomas, additional, Shayduk, Maxim, additional, Shore, Steve N., additional, Sidro, Nuria, additional, Sierpowska-Bartosik, Agnieszka, additional, Sillanpää, Aimo, additional, Sitarek, Julian, additional, Sobczynska, Dorota, additional, Spanier, Felix, additional, Stamerra, Antonio, additional, Schneebeli, Luisa Sabrina Stark, additional, Takalo, Leo, additional, Tavecchio, Fabrizio, additional, Temnikov, Petar, additional, Tescaro, Diego, additional, Teshima, Masahiro, additional, Tluczykont, Martin, additional, Torres, Diego F., additional, Turini, Nicola, additional, Vankov, Hristofor, additional, Wagner, Robert M., additional, Wittek, Wolfgang, additional, Zabalza, Victor, additional, Zandanel, Fabio, additional, Zanin, Roberta, additional, and Zapatero, Jordi, additional

Published
2009
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82. SUZAKUWIDE BAND ANALYSIS OF THE X-RAY VARIABILITY OF TeV BLAZAR Mrk 421 IN 2006

Author

Ushio, Masayoshi, primary, Tanaka, Takaaki, additional, Madejski, Grzegorz, additional, Takahashi, Tadayuki, additional, Hayashida, Masaaki, additional, Kataoka, Jun, additional, Mazin, Daniel, additional, Rügamer, Stefan, additional, Sato, Rie, additional, Teshima, Masahiro, additional, Wagner, Stefan, additional, and Yaji, Yuichi, additional

Published
2009
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83. Back Illuminated Drift Silicon Photomultiplier as Novel Detector for Single Photon Counting

Author

Merck, Christine, primary, Eckhardt, Rouven, additional, Hartmann, Robert, additional, Holl, Peter, additional, Koitsch, Christian, additional, Mirzoyan, Razmik, additional, Moser, Hans-Gunther, additional, Ninkovic, Jelena, additional, Richter, Rainer H., additional, Schaller, Gerhard, additional, Schopper, Florian, additional, Soltau, Heike, additional, Struder, Lothar, additional, Teshima, Masahiro, additional, and Valceanu, George, additional

Published
2006
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84. Focal surface for EUSO telescope

Author

Shimizu, Hirohiko M., primary, Ameri, M., additional, Cadoux, F., additional, Catalano, Osvaldo, additional, Chapron, C., additional, Cuneo, S., additional, Ebisuzaki, Toshikazu, additional, Fontanelli, Flavio, additional, Gracco, Valerio, additional, Gorodetzky, Philippe, additional, Kawasaki, Yoshiya, additional, Musico, P., additional, Nedelec, Patric, additional, Patzak, T., additional, Pallavicini, M., additional, Petrolini, Alessandro, additional, Plagnol, E., additional, Pratolongo, F., additional, Sannino, Mario, additional, Sakaki, Naoto, additional, Takahashi, Yoshiyuki, additional, Takeda, M., additional, Takizawa, Yoshiyuki, additional, and Teshima, Masahiro, additional

Published
2003
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85. Propagation of Ultra-High-Energy Nuclei in the Extra-galactic Photon Field.

Author

Yamamoto, Tokonatsu and Teshima, Masahiro

Subjects
*PHOTONS, *MAGNETIC fields, *NUCLEAR physics, *ASTROPHYSICAL radiation, *RADIOACTIVITY, *PHYSICS
Abstract

We present a calculation of nuclei propagation with energies above 1018 eV in the intergalactic photon field. The calculation is based on a Monte Carlo approach for the nucleus-photon interaction as well as the intergalactic magnetic field. We then assume that the Ultra-High Energy Cosmic Rays (UHECR) are nuclei which are emitted from extra-galactic point sources. Four bumps are found in the energy spectrum of the UHECR which form clusters in the distribution of their arrival directions. Based on this calculation, the energy distribution of the clustered events is discussed. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2004
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87. AGASA results and telescope array project.

Author

Teshima, Masahiro

Subjects
*PARTICLES (Nuclear physics), *COSMIC rays, *OBSERVATORIES
Abstract

The existence of Super-GZK particles, cosmic rays above 10[sup 20]eV, was well established by the AGASA experiment. However, its nature is still in mystery. We will discuss the interest and the importance of the highest energy cosmic-ray measurement and report the latest results of AGASA. The status of telescope array project and R&D results will be also presented. [ABSTRACT FROM AUTHOR]

Published
2001

88. Tape-cast and sintered β-tricalcium phosphate laminates for biomedical applications: Effect of milled Al2O3 fiber additives on microstructural and mechanical properties.

Author

Tanimoto, Yasuhiro, Teshima, Masahiro, Nishiyama, Norihiro, Yamaguchi, Masaru, Hirayama, Satoshi, Shibata, Yo, and Miyazaki, Takashi

Abstract

The aim of this study was to develop the tape-cast, laminated, and sintered β-tricalcium phosphate (β-TCP) with milled Al2O3 fibers for biomedical applications. Moreover, the effects of Al2O3-fiber content on the microstructural and mechanical properties of the sintered β-TCP laminates were investigated. The milled Al2O3 fibers were added at four different contents, namely 0, 5, 10, or 15 mass%, to the initial β-TCP slurry. Next, β-TCP green sheets were fabricated from the β-TCP slurry containing the milled Al2O3 fibers by a tape-casting method. Finally, six plies of β-TCP monolayer sheet were laminated and sintered at a maximum temperature of 1100°C in a furnace. The results showed that there were large differences between the apparent porosities, dynamic hardness, and flexural properties of the sintered β-TCP laminates with Al2O3-fiber contents of 0 and 5 mass%, but few differences among laminates with fiber contents of 5, 10, and 15 mass%. This indicates that the addition of only 5 mass% of Al2O3 fibers strongly affects the degree of sintering, corresponding to crystallization of the β-TCP matrix phase. Furthermore, the flexural moduli of our materials ranged from 10.7 to 16.0 GPa when the Al2O3-fiber content changed from 5 to 15 mass% and were the almost same as those of human bones reported by other researchers. In conclusion, sintered β-TCP laminates with Al2O3 fibers have potential uses in a wide range of biomedical applications because the microstructural and mechanical properties of the sintered β-TCP laminates can be controlled by adding Al2O3 fibers to the β-TCP. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2012. [ABSTRACT FROM AUTHOR]

Published
2012
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89. Prospects of Using Silicon Photomultipliers for the Astroparticle Physics Experiments EUSO and MAGIC.

Author

Nepomuk Otte, A., Dolgoshein, Boris, Hose, Jürgen, Kiemin, Sergei, Lorenz, Eckart, Lutz, Gerhard, Mirzoyan, Razmick, Popova, Elena, Richter, Rainer H., Struder, Lothar W. J., and Teshima, Masahiro

Subjects
PHOTOMULTIPLIERS, SILICON, PARTICLES (Nuclear physics), CHERENKOV radiation, NUCLEAR counters, PHOTONS, TELESCOPES, NUCLEAR physics, NUCLEAR science
Abstract

We discuss the silicon photomultiplier as a novel photon detector for the Major Atmospheric Gamma Imaging Cerenkov Telescope and the Extreme Universe Space Observatory. For these astroparticle experiments we pursue two different developments of the SiPM. One development is pursued at MEPhI, where prototypes are available. In the course of this paper we will describe some characteristics of these devices. The second development, which is using the back illumination principle is at present in its design phase. [ABSTRACT FROM AUTHOR]

Published
2006
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90. Mechanics and cooling system for the camera of the large size telescopes of the Cherenkov Telescope Array (CTA)

Author

Delgado, Carlos, Blanch, Oscar, Diaz, Carlos, Hamer, Noemi, Hideyuki, Ohoka, Mirzoyan, Razmik, Teshima, Masahiro, Wetteskind, Holger, and Yamamoto, Tokonatsu

Subjects
Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

Mechanics of the camera for the large size telescopes of CTA must protect and provide a stable environment for its instrumentation. This is achieved by a stiff support structure enclosed in an air and water tight volume. The structure is specially devised to facilitate extracting the power dissipated by the focal plane electronics while keeping its weight small enough to guarantee an optimum load on the telescope structure. A heat extraction system is designed to keep the electronics temperature within its optimal operation range, stable in time and homogeneous along the camera volume, whereas it is decoupled from the temperature in the telescope environment. In this contribution, we present the details of this system as well as its verification based in finite element analysis computations and tested prototypes. Finally, issues related to the integration of the camera mechanics and electronics will be dealt with., Comment: In Proceedings of the 33rd International Cosmic Ray Conference (ICRC2013), Rio de Janeiro (Brazil). All CTA contributions at arXiv:1307.2232

91. Suzaku and Multi-Wavelength Observations of OJ 287 during the Periodic Optical Outburst in 2007

Author

Seta, Hiromi, Isobe, Naoki, Tashiro, Makoto S., Yaji, Yuichi, Arai, Akira, Fukuhara, Masayuki, Kohno, Kotaro, Nakanishi, Kouichiro, Sasada, Mahito, Shimajiri, Yoshito, Tosaki, Tomoka, Uemura, Makoto, Anderhub, Hans, Antonelli, Lucio Angelo, Antoranz, Pedro, Backes, Michael, Baixeras, Carmen, Balestra, Silvia, Abel Barrio, Juan, Bastieri, Denis, Becerra Gonzalez, Josefa, Becker, Julia K., Bednarek, Wlodzimierz, Berger, Karsten, Bernardini, Elisa, Biland, Adrian, Bock, Rudolf K., Bonnoli, Giacomo, Bordas, Pol, Tridon, Daniela Borla, Bosch-Ramon, Valenti, Bose, Debanjan, Braun, Isabel, Bretz, Thomas, Britvitch, Ilia, Camara, Miguel, Carmona, Emiliano, Commichau, Sebastian, Luis Contreras, Jose, Cortina, Juan, Costado Dios, Ma Teresa, Covino, Stefano, Curtef, Valentin, Dazzi, Francesco, Angelis, Alessandro, Cea Del Pozo, Elsa, Los Reyes, Raquel, Lotto, Barbara, Maria, Michela, Sabata, Francesco, Delgado Mendez, Carlos, Dominguez, Alberto, Dorner, Daniela, Doro, Michele, Elsaesser, Dominik, Errando, Manel, Ferenc, Daniela, Fernandez, Enrique, Firpo, Roger, Victoria Fonseca, Maria, Font, Lluis, Galante, Nicola, Garcia Lopez, Ramon J., Garczarczyk, Markus, Gaug, Markus, Goebel, Florian, Hadasch, Daniela, Hayashida, Masaaki, Herrero, Artemio, Hildebrand, Dorothee, Hoehne-Moench, Daniel, Hose, Juergen, Hsu, Ching Cheng, Jogler, Tobias, Kranich, Daniel, La Barbera, Antonio, Laille, Alvin, Leonardo, Elvira, Lindfors, Elina, Lombardi, Saverio, Longo, Francesco, Lopez, Donatella, Lorenz, Eckart, Majumdar, Pratik, Maneva, Galina, Mankuzhiyil, Nijil, Mannheim, Karl, Maraschi, Laura, Mariotti, Mose, Martinez, Manel, Mazin, Daniel, Meucci, Mario, Meyer, Markus, Miguel Miranda, Jose, Mirzoyan, Razmick, Miyamoto, Hiroko, Moldon, Javier, Moles, Mariano, Moralejo, Abelardo, Daniel Nieto, Nilsson, Kari, Ninkovic, Jelena, Otte, Nepomuk, Oya, Igor, Paoletti, Riccardo, Paredes, Josep M., Pasanen, Mikko, Pascoli, Donatella, Pauss, Felicitas, Pegna, Raffaello G., Perez-Torres, Miguel A., Persic, Massimo, Peruzzo, Luigi, Prada, Francisco, Prandini, Elisa, Puchades, Neus, Reichardt, Ignasi, Rhode, Wolfgang, Ribo, Marc, Rico, Javier, Rissi, Michael, Robert, Arnau, Ruegamer, Stefan, Saggion, Antonio, Saito, Takayuki Y., Salvati, Marco, Sanchez-Conde, Miguel, Satalecka, Konstancja, Scalzotto, Villi, Scapin, Valeria, Schweizer, Thomas, Shayduk, Maxim, Shore, Steve N., Sidro, Nuria, Sierpowska-Bartosik, Agnieszka, Sillanpaa, Aimo, Sitarek, Julian, Sobczynska, Dorota, Spanier, Felix, Stamerra, Antonio, Schneebeli, Luisa Sabrina Stark, Takalo, Leo, Tavecchio, Fabrizio, Temnikov, Petar, Tescaro, Diego, Teshima, Masahiro, Tluczykont, Martin, Torres, Diego F., Turini, Nicola, Vankov, Hristofor, Wagner, Robert M., Wittek, Wolfgang, Zabalza, Victor, Zandanel, Fabio, Zanin, Roberta, Zapatero, Jordi, and Magic, Collaboration

92. The Highest Energy Cosmic Rays

Author

Teshima, Masahiro

Abstract

The existence of Super-GZK particles, cosmic rays above 1020eV, was well established by the AGASA experiment. Recent data from AGASA strongly suggests the existence of compact sources, event clusters. These two pieces of experimental evidence seem to be contradictory to each other and are difficult to be explained by simple theoretical models. The origin of the highest energy cosmic rays became more mysterious with the increase of statistics. We will review the experimental results of AGASA and discuss the origin of the highest energy cosmic rays. The status of our future project telescope array is also reported.

Published
2013
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93. Feeling the Texture of Vacuum: Laser Acceleration toward PeV

Author

Tajima, Toshiki, Kando, Masaki, and Teshima, Masahiro

Abstract

We contemplate if there is a way to reach energies that allow us to probe the tiniest structures in the physical world in a laboratory. Identified are the method of laser acceleration to meet this challenge and a set of ballpark parameters for laser, plasma, and accelerator technologies that are defined for accelerated electron energies reaching as high as PeV. These parameters are carved out from the theoretical laws that govern the physics of laser acceleration, theoretically suggested and experimentally explored over a wide range in recent years. We extrapolate this knowledge toward PeV energies (over 1000 stages of TeV). In the density regime on the order of 1017 cm−3, it is possible to consider the application of the existing NIF (or LMJ) or its extended lasers to their appropriate retrofitting for this purpose. Such energies by themselves may allow us to begin to feel and study the physics of the ‘texture of vacuum’. This is an example of fundamental physics exploration without the need of luminosity paradigm and even the production of a single particle at PeV per shot amounts to useful physics at such an extreme energy that far surpasses the contemporary energy horizon in the laboratory. By converting accelerated electrons with extreme energies to like-energy gamma photons, and let them propagate through vacuum over a sufficient distance, these extremely high energy (and therefore short wavelength) photons experience smallest vacuum structures and fluctuations. We introduce an ultrashort detection method of PeV energy γ's with sub-fs sensitivity by the novel combination of the Schwinger-like vacuum emission of e−e+ by the PeV γ and the carrier-envelope phase (CEP) laser streaking technique with the attosecond phase accuracy. This compilation of the ability to reach PeV and to measure the fs time resolution of PeV γ photons can provide valuable data if and how gamma photons still obey the premise of relativity or the vacuum texture begins to alter such fundamentals. The only method currently available to look at this problem may be to study astrophysical data of the primordial gamma ray bursts (GRBs), which are compared with the presently suggested approach.

Published
2011
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94. Energy Spectrum of Ultra-High Energy Cosmic Rays with Extra-Galactic Origin

Author

Yoshida, Shigeru and Teshima, Masahiro

Abstract

We carried out a numerical calculation for the propagation of ultra-high energy cosmic ray nucleons in the inergalactic space by a Monte-Carlo method. The resulting energy spectrum above 1018 eV is modified by the interaction of nucleons with the micro wave background (MWB) photons, forming a bump and a cutoff, with position depending on the propagation distance and source distribution. It is found that the treatment of the evolution of the universe and the interactions between cosmic rays and MWB photons is crucial. We also calculated the spectra of neutrinos and gamma rays produced by the interaction of nucleons with MWB photons. The flux of these particles strongly depends on propagation distance, cosmological evolution parameter and the maximum energy of the cosmic rays. The possibility to detect the secondary neutrinos is also discussed.

Published
1993
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95. Tape-cast and sintered β-tricalcium phosphate laminates for biomedical applications: Effect of milled Al2O3 fiber additives on microstructural and mechanical properties.

Author

Tanimoto Y, Teshima M, Nishiyama N, Yamaguchi M, Hirayama S, Shibata Y, and Miyazaki T

Subjects
Hot Temperature, Stress, Mechanical, Aluminum Oxide chemistry, Calcium Phosphates chemistry, Materials Testing
Abstract

The aim of this study was to develop the tape-cast, laminated, and sintered β-tricalcium phosphate (β-TCP) with milled Al(2)O(3) fibers for biomedical applications. Moreover, the effects of Al(2)O(3)-fiber content on the microstructural and mechanical properties of the sintered β-TCP laminates were investigated. The milled Al(2)O(3) fibers were added at four different contents, namely 0, 5, 10, or 15 mass%, to the initial β-TCP slurry. Next, β-TCP green sheets were fabricated from the β-TCP slurry containing the milled Al(2)O(3) fibers by a tape-casting method. Finally, six plies of β-TCP monolayer sheet were laminated and sintered at a maximum temperature of 1100°C in a furnace. The results showed that there were large differences between the apparent porosities, dynamic hardness, and flexural properties of the sintered β-TCP laminates with Al(2)O(3)-fiber contents of 0 and 5 mass%, but few differences among laminates with fiber contents of 5, 10, and 15 mass%. This indicates that the addition of only 5 mass% of Al(2)O(3) fibers strongly affects the degree of sintering, corresponding to crystallization of the β-TCP matrix phase. Furthermore, the flexural moduli of our materials ranged from 10.7 to 16.0 GPa when the Al(2)O(3)-fiber content changed from 5 to 15 mass% and were the almost same as those of human bones reported by other researchers. In conclusion, sintered β-TCP laminates with Al(2)O(3) fibers have potential uses in a wide range of biomedical applications because the microstructural and mechanical properties of the sintered β-TCP laminates can be controlled by adding Al(2)O(3) fibers to the β-TCP., (Copyright © 2012 Wiley Periodicals, Inc.)

Published
2012
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