Improvement of the modulation factor for a Compton scattering type polarimeter using subdivided scintillators

Author

Gunji, S. ; Kudo, E. ; Sakurai, H.

Author_Institution

Dept. of Phys., Yamagata Univ., Japan

fYear

1997

fDate

9-15 Nov 1997

Firstpage

610

Abstract

We are developing a Compton scattering type polarimeter, using plastic scintillators as scatterers and NaI(Tl) scintillators as detectors of scattered X rays. To improve the modulation factor keeping the good detection efficiency, we investigated the effect of subdivided plastic and NaI(Tl) scintillators for the modulation factor and the detection efficiency with basic tests and computer simulations. By measuring both x and y points of the scattering and the absorption with 1.4 cm accuracy by the subdivision, the modulation factor can go up to 38%, keeping the detection efficiency of 36%. As both positions are detected with 7 mm accuracy, this type of polarimeter will obtain modulation factor of 45%. By this improvement, the polarimeter call obtain about two times higher performance than that by the former design

Keywords

Compton effect; X-ray astronomy; X-ray detection; astronomical instruments; modulation; polarimeters; solid scintillation detectors; Compton scattering type polarimeter; NaI(Tl) scintillators; NaI:Tl; detection efficiency; modulation factor; plastic scintillators; Extraterrestrial measurements; Optical collimators; Optical coupling; Optical scattering; Optical sensors; Physics; Plastics; Polarization; Radiation detectors; X-ray scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium, 1997. IEEE

Conference_Location

Albuquerque, NM

ISSN

1082-3654

Print_ISBN

0-7803-4258-5

Type

conf

DOI

10.1109/NSSMIC.1997.672656

Filename

672656