Drift parameters optimization of a TPC polarimeter: a simulation study
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- 作者：K. Rakhee ; V. Radhakrishna ; V. Koushal ; G. Baishali…
- 关键词：X ; ray polarimetry ; GEM detector ; TPC polarimeter ; Photoelectron polarimeter
- 刊名：Experimental Astronomy
- 出版年：2015
- 出版时间：June 2015
- 年：2015
- 卷：39
- 期：2
- 页码：303-318
- 全文大小：2,195 KB
- 参考文献：1.ANSYS? Multiphysics Software, Ansys Inc
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V. Radhakrishna (1)
V. Koushal (1)
G. Baishali (3)
A. M. Vinodkumar (2)
1. Space Astronomy Group, ISRO Satellite Centre, Bangalore, India
2. Department of Physics, University of Calicut, Kerala, India
3. Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, India - 刊物类别：Physics and Astronomy
- 刊物主题：Physics
Astronomy
Statistics for Engineering, Physics, Computer Science, Chemistry and Geosciences - 出版者：Springer Netherlands
- ISSN：1572-9508
文摘
Time Projection Chamber (TPC) based X-ray polarimeters using Gas Electron Multiplier (GEM) are currently being developed to make sensitive measurement of polarization in 2-0?keV energy range. The emission direction of the photoelectron ejected via photoelectric effect carries the information of the polarization of the incident X-ray photon. Performance of a gas based polarimeter is affected by the operating drift parameters such as gas pressure, drift field and drift-gap. We present simulation studies carried out in order to understand the effect of these operating parameters on the modulation factor of a TPC polarimeter. Models of Garfield are used to study photoelectron interaction in gas and drift of electron cloud towards GEM. Our study is aimed at achieving higher modulation factors by optimizing drift parameters. Study has shown that Ne/DME (50/50) at lower pressure and drift field can lead to desired performance of a TPC polarimeter.