1. Development and Performance Verification of a TPC Polarimeter for High Energy X-rays
- Author
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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
- Subjects
Astronomy - 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.
- Published
- 2020
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