Zobrazeno 1 - 10 of 16 pro vyhledávání: '"Takuya Kotaka"'
1
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〉
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
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8951b7efc82347ae9ed93db9f3454699
https://doi.org/10.1016/j.astropartphys.2017.10.008
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2
Measurement of 1.7–74 MeV polarised γ rays with the HARPO TPC
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〉
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
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::893e955d7506ef61b9fe0d40859b0b5e
https://doi.org/10.1016/j.nima.2016.06.031
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4
A Comprehensive Analysis of Polarized $\gamma $ -ray Beam Data with the HARPO Demonstrator
Autor: P. Poilleux, M. Frotin, R. Yonamine, Satoshi Hashimoto, Y. Minamiyama, D. Horan, D. Baudin, D. Calvet, I. Semeniouk, H. Ohkuma, P. Baron, S. Miyamoto, A. Delbart, P. Sizun, Masashi Yamaguchi, D. Gotz, P. Bruel, Philippe Gros, M. Louzir, D. Bernard, D. Attié, S. Wang, Paul Colas, B. Giebels, Takuya Kotaka, S. Daté, Akinori Takemoto, Y. Geerebaert, Sho Amano
Publikováno v: Springer Proc.Phys.
4th International conference on Technology and Instrumentation in Particle Physics
4th International conference on Technology and Instrumentation in Particle Physics, May 2017, Beijing, China. pp.27-30, ⟨10.1007/978-981-13-1313-4_6⟩
Springer Proceedings in Physics ISBN: 9789811313127
International audience; We investigate the feasibility of gaseous TPC as a telescope and a polarimeter for cosmic gamma-rays, focussing on the energy range from 1 to 100 MeV. Our beam results show the angular resolution can reach a factor of 2 better
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba4402cd27dc766246ddfca5125e73bf
https://hal.archives-ouvertes.fr/hal-01863380
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5
A TPC as high performance gamma-ray telescope and polarimeter: polarisation measurement in a beam between 1.7 and 74MeV with HARPO
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⟩
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
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7
First measurement of the polarisation asymmetry of a gamma-ray beam between 1.7 to 74 MeV with the HARPO TPC
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
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
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8
Electronics for HARPO: Design, development and validation of electronics for a high performance polarised-Gamma-ray detector
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⟩
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
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::740c2b61f8858850247404d6afdaa9c7
https://doi.org/10.1109/rtc.2016.7543098
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10
Etching damage and its recovery by soft X-ray irradiation observed in soft X-ray absorption spectra of TiO2 thin film
Autor: Yoshitaka Nakano, Keiji Sano, Retsuo Kawakami, Masahito Niibe, Kikuo Tominaga, Takuya Kotaka
Publikováno v: Journal of Applied Physics. 113:126101
Damage characteristics of TiO2 thin films etched by N2 plasma were analyzed using soft X-ray absorption spectroscopy. Changes in the spectra at the Ti-L2,3 near-edge X-ray absorption fine structure (NEXAFS) resulting from etching damage were observed
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8146a9ee16d04aaf72873b59df9ff47
https://doi.org/10.1063/1.4798301
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