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Development of cosmic x-ray polarimeter

Hayato, Asami and Tamagawa, Toru and Tsunoda, Naoko and Hashimoto, Shigehira and Miyamoto, Masao and Kohama, Mitsuhiro and Tokanai, Fuyuki and Hamagaki, Hideki and Inuzuka, Masahide and Miyasaka, Hiromasa and Sakurai, Ikuya and Makishima, Kazuo (2006) Development of cosmic x-ray polarimeter. In: Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray. Proceedings of SPIE. No.6266. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 62663X. ISBN 9780819463319.

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We present a performance study of a cosmic X-ray polarimeter which is based on the photoelectric effect in gas, and sensitive to a few to 30 keV range. In our polarimeter, the key device would be the 50 μm pitch Gas Electron Multiplier (GEM). We have evaluated the modulation factor using highly polarized X-ray, provided by a synchrotron accelerator. In the analysis, we selected events by the eccentricity of the charge cloud of the photoelectron track. As a result, we obtained the relationship between the selection criteria for the eccentricity and the modulation factors; for example, when we selected the events which have their eccentricity of > 0.95, the polarimeter exhibited with the modulation factor of 0.32. In addition, we estimated the Minimum Detectable Polarization degree (MDP) of Crab Nebula with our polarimeter and found 10 ksec observation is enough to detect the polarization, if we adopt suitable X-ray mirrors.

Item Type:Book Section
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Miyasaka, Hiromasa0000-0002-8074-4186
Additional Information:© 2006 SPIE.
Group:Space Radiation Laboratory
Subject Keywords:X-ray, Polarimeter, Polarization, GEM, Gas Electron Multiplier, Proportional Counter
Series Name:Proceedings of SPIE
Issue or Number:6266
Record Number:CaltechAUTHORS:20180109-111622013
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Official Citation:Asami Hayato, Toru Tamagawa, Naoko Tsunoda, Shigehira Hashimoto, Masao Miyamoto, Mitsuhiro Kohama, Fuyuki Tokanai, Hideki Hamagaki, Masahide Inuzuka, Hiromasa Miyasaka, Ikuya Sakurai, Kazuo Makishima, "Development of cosmic x-ray polarimeter", Proc. SPIE 6266, Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray, 62663X (15 June 2006); doi: 10.1117/12.671242;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84191
Deposited By: Tony Diaz
Deposited On:09 Jan 2018 19:28
Last Modified:15 Nov 2021 20:17

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