Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Haruo Ohkuma"'
Performance measurement of HARPO: A time projection chamber as a gamma-ray telescope and polarimeter
Autor:
Sho Amano, Philippe Gros, A. Delbart, Haruo Ohkuma, Shuji Miyamoto, P. Poilleux, M. Frotin, Y. Geerebaert, Akinori Takemoto, R. Yonamine, Y. Minamiyama, S. Daté, D. Baudin, P. Bruel, M. Louzir, D. Horan, S. Wang, Masashi Yamaguchi, D. Gotz, I. Semeniouk, P. Baron, Frédéric Magniette, P. Sizun, Satoshi Hashimoto, D. Calvet, D. Bernard, David Attié, B. Giebels, Takuya Kotaka, Paul Colas
Publikováno v:
Astropart.Phys.
Astropart.Phys., 2018, 97, pp.10-18. ⟨10.1016/j.astropartphys.2017.10.008⟩
Astropart.Phys., 2018, 97, pp.10-18. 〈10.1016/j.astropartphys.2017.10.008〉
Astropart.Phys., 2018, 97, pp.10-18. ⟨10.1016/j.astropartphys.2017.10.008⟩
Astropart.Phys., 2018, 97, pp.10-18. 〈10.1016/j.astropartphys.2017.10.008〉
We analyse the performance of a gas time projection chamber (TPC) as a high-performance gamma-ray telescope and polarimeter in the e$^+$e$^-$ pair creation regime. We use data collected at a gamma-ray beam of known polarisation. The TPC provides two
Autor:
M. Louzir, P. Sizun, M. Frotin, Ph. Gros, Y. Minamiyama, S. Daté, A. Delbart, D. Calvet, D. Gotz, P. Colas, P. Poilleux, David Attié, I. Semeniouk, B. Giebels, Akinori Takemoto, Shuji Miyamoto, Takuya Kotaka, P. Bruel, Masashi Yamaguchi, D. Bernard, Satoshi Hashimoto, Sho Amano, Y. Geerebaert, Haruo Ohkuma, D. Horan, S. Wang
Publikováno v:
Nucl.Instrum.Meth.A
14th Vienna Conference on Instrumentation
14th Vienna Conference on Instrumentation, Feb 2016, Vienna, Austria. pp.228-232, ⟨10.1016/j.nima.2016.06.031⟩
14th Vienna Conference on Instrumentation, Feb 2016, Vienna, Austria. Nucl.Instrum.Meth.A, 845, pp.228-232, 2017, 〈10.1016/j.nima.2016.06.031〉
14th Vienna Conference on Instrumentation
14th Vienna Conference on Instrumentation, Feb 2016, Vienna, Austria. pp.228-232, ⟨10.1016/j.nima.2016.06.031⟩
14th Vienna Conference on Instrumentation, Feb 2016, Vienna, Austria. Nucl.Instrum.Meth.A, 845, pp.228-232, 2017, 〈10.1016/j.nima.2016.06.031〉
Current {\gamma}-ray telescopes based on photon conversions to electron-positron pairs, such as Fermi, use tungsten converters. They suffer of limited angular resolution at low energies, and their sensitivity drops below 1 GeV. The low multiple scatt
Autor:
P. Baron, Masashi Yamaguchi, P. Poilleux, R. Yonamine, I. Semeniouk, Y. Geerebaert, M. Frotin, Philippe C. Gros, Denis Bernard, Frédéric Magniette, S. Hashimoto, Diego Götz, David Attié, A. Delbart, Y. Minamiyama, B. Giebels, D. Bauduin, S. Miyamoto, S. Wang, M. Louzir, Paul Colas, P. Sizun, T. Kotaka, D. Horan, S. Daté, Haruo Ohkuma, Akinori Takemoto, P. Bruel, D. Calvet, Sho Amano
Publikováno v:
PoS
35th International Cosmic Ray Conference
35th International Cosmic Ray Conference, Jul 2017, Busan, South Korea. pp.818, ⟨10.22323/1.301.0818⟩
Scopus-Elsevier
35th International Cosmic Ray Conference
35th International Cosmic Ray Conference, Jul 2017, Busan, South Korea. pp.818, ⟨10.22323/1.301.0818⟩
Scopus-Elsevier
International audience; Access to the photon polarisation in the 1-100 MeV energy range is a challenge for the next generation of space telescopes. The current telescopes in space are almost blind in this energy range, mainly due to the degradation o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8405a927870543b4dac77793d9997f8a
https://hal.archives-ouvertes.fr/hal-01890896
https://hal.archives-ouvertes.fr/hal-01890896
Autor:
Chary Rangacharyulu, S. Hasegawa, S. Ajimura, Masaharu Nomachi, K. Yonehara, R. Murayama, H. Ejiri, H. Kawai, C. W. Wang, Jaw-Luen Tang, M. Ungaro, T. Sawada, Hidetoshi Akimune, Shuji Fukui, M. Yosoi, P. M. Shagin, H. Kohri, D. S. Ahn, N. Matsuoka, Hiroyuki Toyokawa, Yuji Ohashi, Y. Asano, T. Ooba, Atsushi Sakaguchi, Yorihito Sugaya, Tetsuhiko Yorita, Hajime Shimizu, Yoshikazu Maeda, A. O. Tokiyasu, T. Ishikawa, R. G. T. Zegers, Y. Toi, Norihito Muramatsu, K. Horie, S. Daté, Y. Shiino, N. Kumagai, M. Miyachi, S. Y. Ryu, A. Wakai, S. C. Wang, Joseph D. Parker, E. A. Strokovsky, K. Kino, S. Makino, Tsutomu Mibe, T. Matsuda, M. Uchida, D. L. Lin, Y. Kon, Y. Nakatsugawa, Manabu Miyabe, Tomoaki Hotta, J. K. Ahn, M. Niiyama, T. Nakano, J. Y. Chen, T. Matsumura, W. C. Chang, T. Iwata, Takashi Ohta, M. Fujiwara, T. Tsunemi, Kenichi Imai, Y. Kato, Masato Yoshimura, M. Sumihama, S. H. Hwang, K. Hicks, Haruo Ohkuma, H. Fujimura, D. S. Oshuev
Publikováno v:
Physics Letters B. 728:616-621
A search for the K − p p bound state (the lightest kaonic nucleus) has been performed using the γ d → K + π − X reaction at E γ = 1.5 – 2.4 GeV at LEPS/SPring-8. The differential cross section of the K + π − photo-production off deuteri
Autor:
Denis Bernard, S. Miyamoto, M. Louzir, M. Frotin, Sho Amano, Philippe C. Gros, D. Horan, Masashi Yamaguchi, S. Daté, Satoshi Hashimoto, P. Colas, D. Calvet, Y. Minamiyama, Y. Geerebaert, David Attié, P. Bruel, I. Semeniouk, B. Giebels, Takuya Kotaka, Akinori Takemoto, Shaobo Wang, Frédéric Magniette, D. Gotz, A. Delbart, R. Yonamine, P. Baron, D. Baudin, P. Sizun, P. Poilleux, Haruo Ohkuma
Publikováno v:
J.Phys.Conf.Ser.
8th Symposium on Large TPCs for Low-Energy Rare Event Detection
8th Symposium on Large TPCs for Low-Energy Rare Event Detection, Dec 2016, Paris, France. pp.012003, ⟨10.1088/1742-6596/1029/1/012003⟩
8th Symposium on Large TPCs for Low-Energy Rare Event Detection
8th Symposium on Large TPCs for Low-Energy Rare Event Detection, Dec 2016, Paris, France. pp.012003, ⟨10.1088/1742-6596/1029/1/012003⟩
International audience; We presented in 2014 the very first data from a polarised gamma-ray beam between 1.7 and 74MeV. We now show the results of their analysis, and in particular the polarimetry measurements. With these results, we are establishing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9e05b246ba961de8ff212f8e3591c6c
https://hal.archives-ouvertes.fr/hal-01839688
https://hal.archives-ouvertes.fr/hal-01839688
Autor:
M. Frotin, P. Colas, D. Calvet, Philippe Gros, Haruo Ohkuma, M. Louzir, D. Bernard, David Attié, B. Giebels, Takuya Kotaka, A. Delbart, P. Sizun, P. Bruel, I. Semeniouk, D. Gotz, P. Poilleux, Sho Amano, S. Wang, D. Horan, Masashi Yamaguchi, Y. Minamiyama, Y. Geerebaert, Satoshi Hashimoto, Akinori Takemoto, Shuji Miyamoto, S. Daté
Publikováno v:
SPIE Astronomical Telescopes + Instrumentation
SPIE Astronomical Telescopes + Instrumentation, Jun 2016, Edinburgh, France. pp.99052R
SPIE Astronomical Telescopes + Instrumentation, Jun 2016, Edinburgh, France. pp.99052R
Current γ-ray telescopes suffer from a gap in sensitivity in the energy range between 100 keV and 100 MeV, and no polarisation measurement has ever been done on cosmic sources above 1 MeV. Past and present e+e- pair telescopes are limited at lower e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7be8f3a503d936a8d57c55c20f29fa85
http://hal.in2p3.fr/in2p3-02003344
http://hal.in2p3.fr/in2p3-02003344
Autor:
J. Y. Chen, Y. Nakatsugawa, S. i. Nam, R. G. T. Zegers, Jung Keun Ahn, P. M. Shagin, M. Fujiwara, Takashi Ohta, Y. Toi, Tetsuhiko Yorita, H. Kohri, Yoshikazu Maeda, E. A. Strokovsky, K. Kino, S. Hasegawa, M. Miyachi, C. W. Wang, T. Matsuda, S. Daté, Yuhei Morino, S. Ajimura, T. Ishikawa, M. Sumihama, T. Ooba, S. Fukui, M. Uchida, S. C. Wang, J. Parker, Tomoaki Hotta, Takahiro Iwata, S. Makino, R. Murayama, A. O. Tokiyasu, K. Hicks, Haruo Ohkuma, N. Kumagai, A. Wakai, Y. Shiino, W. C. Chang, Masaharu Nomachi, H. Ejiri, T. Nakano, Masato Yoshimura, Hidetoshi Akimune, S. Y. Ryu, K. Horie, Hiroyuki Toyokawa, P. J. Lin, Yuji Ohashi, D. S. Ahn, T. Sawada, Chary Rangacharyulu, H. Fujimura, K. Yonehara, H. Kawai, Y. Asano, Hajime Shimizu, D. S. Oshuev, T. Tsunemi, Kenichi Imai, Y. Kato, S. H. Hwang, N. Matsuoka, Atsushi Sakaguchi, Yorihito Sugaya, Norihito Muramatsu, M. Ungaro, M. Yosoi, Y. Kon, Tsutomu Mibe, Manabu Miyabe, M. Niiyama
Publikováno v:
Physical Review Letters. 116
The $\ensuremath{\phi}\text{\ensuremath{-}}\mathrm{\ensuremath{\Lambda}}(1520)$ interference effect in the $\ensuremath{\gamma}p\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}p$ reaction has been measured for the first time in the energy range fr
Autor:
Patrick Sizun, A. Delbart, D. Horan, Philippe Gros, M. Frotin, D. Calvet, Satoshi Hashimoto, Y. Minamiyama, P. Poilleux, Sho Amano, S. Wang, D. Bernard, Shuji Miyamoto, P. Bruel, I. Semeniouk, Y. Geerebaert, M. Louzir, Haruo Ohkuma, S. Daté, David Attié, Masashi Yamaguchi, B. Giebels, Diego Götz, Takuya Kotaka, P. Colas, Akinori Takemoto
Publikováno v:
Web of Science
20th IEEE-NPSS Real Time Conference
20th IEEE-NPSS Real Time Conference, Jun 2016, Padua, Italy. ⟨10.1109/RTC.2016.7543098⟩
20th IEEE-NPSS Real Time Conference
20th IEEE-NPSS Real Time Conference, Jun 2016, Padua, Italy. ⟨10.1109/RTC.2016.7543098⟩
International audience; We designed and built an experimental apparatus based on a time projection chamber, a novel scheme for high performance γ-ray astronomy and polarimetry in the γ → e+e- regime. This presentation focuses on the electronics a
Publikováno v:
Vacuum. 86:938-942
The first electron beam was stored in SPring-8 storage ring in March 1997. An overview of the 13 years’ operational experience concerning the vacuum system of the SPring-8 storage ring is presented. The evolution of the vacuum system and their perf
Publikováno v:
Journal of the Vacuum Society of Japan. 54:158-161
A lot of aluminum (A2219-T852) flanges with a knife-edge seal have been used at the SPring-8 storage ring. We investigated an Electron Beam Modified (EBM) knife-edge seal for the flange to confirm seal compatibility with the original A2219-T852 flang