Basic performance of unitized Compton scattering type polarimeter

Author

Tomita, H. ; Sano, S. ; Sakurai, H. ; Noma, M. ; Gunji, S. ; Takase, E.

Author_Institution

Dept. of Phys., Yamagata Univ., Japan

Volume

1

fYear

1995

fDate

21-28 Oct 1995

Firstpage

243

Abstract

We have been developing a Compton scattering type polarimeter which consists of nine unit counters to detect the polarization of hard X-rays from stellar objects such as the Crab Nebula. One unit counter which consists of one plastic scintillator (7×7×5 cm³) and four phoswich counters (6.7×1.1×32.2 cm³) made of NaI(Tl)+CsI(Na) was constructed and its performance was measured in detail. The detection efficiency and the modulation factor of the unit counter were about 30% and 25% for energies between 50 keV and 200 keV. Based on them, the performance of the polarimeter is estimated by full computer simulations. From the results, it is recognized that the polarimeter can detect the polarization of hard X-rays from the Crab Nebula in a balloon observation of 3 hours by MDP of 15%

Keywords

Compton effect; X-ray apparatus; X-ray astronomy; X-ray detection; aerospace instrumentation; astronomical instruments; polarimetry; solid scintillation detectors; stellar polarimetry; 1.1 cm; 30 percent; 32.2 cm; 5 cm; 50 to 200 keV; 6.7 cm; 7 cm; Crab Nebula; NaI(Tl)+CsI(Na); balloon observation; detection efficiency; hard X-rays; modulation factor; phoswich counters; plastic scintillator; polarization; stellar objects; unit counters; unitized Compton scattering type polarimeter; Amplitude modulation; Collimators; Magnetic field measurement; Physics; Plastics; Polarization; Radiation detectors; X-ray detection; X-ray detectors; X-ray scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE

Conference_Location

San Francisco, CA

Print_ISBN

0-7803-3180-X

Type

conf

DOI

10.1109/NSSMIC.1995.504218

Filename

504218