Title :
An application of microstrip gas proportional counter for a X-ray polarimeter
Author :
Tamura, T. ; Sugeno, H. ; Sakurai, H. ; Noma, M. ; Gunji, S. ; Gertenbort
Author_Institution :
Dept. of Phys., Yamagata Univ., Japan
Abstract :
An application of a microstrip gas proportional counter to a X-ray polarimeter was investigated. Primary electron clouds produced by photoelectric absorption extend to the direction of electric vector of incident polarized X-ray and the direction of electron clouds to the microstrip plate (MS plate) affects the rise time of signal from MSGC. By using a test counter which mounted a MS plate, the characteristics of the rise time distributions of pulses from MSGC were investigated. The difference of the rise times between X-rays of 55Fe and 241Am sources was 71 nsec in Xe+methane (10%) with 0.4 atm. It reflects the difference of length of the trajectory between 5.9 keV X-rays and 29.8 keV photoelectrons ejected by photoabsorption. The detection of the rise time due to MSGC is available to a X-ray polarimeter
Keywords :
X-ray apparatus; X-ray astronomy; X-ray detection; astronomical instruments; polarimeters; polarimetry; position sensitive particle detectors; proportional counters; stellar polarimetry; 0.4 atm; 29.8 keV; 5.9 keV; X-ray astronomy; X-ray polarimeter; Xe+methane; electric vector; microstrip gas proportional counter; microstrip plate; photoelectric absorption; primary electron clouds; test counter; Clouds; Counting circuits; Electromagnetic wave absorption; Electrons; Iron; Microstrip; Polarization; Testing; X-ray detection; X-ray detectors;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.504216
