Title :
The development of a new type of imaging X-ray detector with a capillary plate
Author :
Tsukahara, M. ; Sakurai, H. ; Saito, S. ; Noma, M. ; Gunji, S. ; Tamura, T.
Author_Institution :
Dept. of Phys., Yamagata Univ., Japan
fDate :
6/1/1997 12:00:00 AM
Abstract :
A new type of optical imaging X-ray detector with a capillary plate was constructed. The instrument consists of a CGPC (Capillary Gas Proportional Counter), a focusing mirror system, and an image intensified CCD camera. Both the charge signal and the light signal from the CGPC were proportional to energy up to hard X-rays of 60 keV. The light output of the CGPC was approximately 250 times larger than that of a NaI(Tl) scintillator. The light yield of the CGPC at gas gain of 300 was 1.2 photons per electron for a gas mixture of xenon +5% methane at 1 atm. Using the optical imaging detector, an image of a track due to an α-particle was detected. Also the first evidence was obtained that the light emission was due to gas multiplication occurring in a thin capillary. Our goal is to use this new type of optical imaging detector as an X-ray polarimeter
Keywords :
CCD image sensors; X-ray apparatus; X-ray astronomy; X-ray detection; alpha-particle detection; astronomical instruments; gas scintillation detectors; polarimeters; proportional counters; α-particle; 1 atm; 60 keV; X-ray polarimeter; capillary gas proportional counter; capillary plate; charge signal; focusing mirror system; gas multiplication; hard X-rays; image intensified CCD camera; imaging X-ray detector; light emission; light signal; Charge coupled devices; Focusing; Image intensifiers; Instruments; Mirrors; Optical detectors; Optical imaging; Radiation detectors; X-ray detectors; X-ray imaging;
Journal_Title :
Nuclear Science, IEEE Transactions on
