Development and performance verification of a TPC polarimeter for high energy x-rays

Tomoshi Takeda; Kevin Black; Teruaki Enoto; Asami Hayato; Joanne Hill; Wataru Iwakiri; Keith Jahoda; Takao Kitaguchi; Miho Okubo; Toru Tamagawa; Marina Tsutsumi; Keisuke Uchiyama; Yuto Yoshida; Yuanhui Zhou

doi:10.1117/12.2561313

13 December 2020 Development and performance verification of a TPC polarimeter for high energy x-rays

Tomoshi Takeda, Kevin Black, Teruaki Enoto, Asami Hayato, Joanne Hill, Wataru Iwakiri, Keith Jahoda, Takao Kitaguchi, Miho Okubo, Toru Tamagawa, Marina Tsutsumi, Keisuke Uchiyama, Yuto Yoshida, Yuanhui Zhou

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Proceedings Volume 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray; 114445Y (2020) https://doi.org/10.1117/12.2561313
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

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Abstract

We present the first application of a time projection chamber polarimeter to measure high energy X-ray polarization above 10 keV. The polarimeter is designed based on the PRAXyS soft X-ray polarimeter. The sealed gas is changed to a gas mixture of 60% argon and 40% dimethyl ether at 1 atm to be sensitive to high energy X-rays. The polarimeter performance is verified with linearly polarized, monochromatic X-rays at a synchrotron radiation facility, KEK Photon Factory BL-14A. The measured modulation factors are 42.4 ± 0.6%, 50.4 ± 0.6%, and 55.0 ± 0.6% at 12, 14, and 16 keV, respectively, and the measured polarization angles are consistent with the expected values at all energies.

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Tomoshi Takeda, Kevin Black, Teruaki Enoto, Asami Hayato, Joanne Hill, Wataru Iwakiri, Keith Jahoda, Takao Kitaguchi, Miho Okubo, Toru Tamagawa, Marina Tsutsumi, Keisuke Uchiyama, Yuto Yoshida, and Yuanhui Zhou "Development and performance verification of a TPC polarimeter for high energy x-rays", Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 114445Y (13 December 2020); https://doi.org/10.1117/12.2561313

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