A novel gaseous two-dimensional imaging detector "Micro Pixel Chamber (micro-PIC)" has been developed. This detector is based on double sided printed circuit board (PCB). We have developed large area (10cm x 10cm) micro-PICs with 65536 pixel anodes of 400um pitch on a 100um thick insulating substrate. Achieved energy resolution was 30% (FWHM) at 5.9keV, and a gas gain of 7000 was obtained with argon ethane (8:2) gas mixture. This gain is high enough to detect minimum ionizing particles with such a small electrode pitch. Although several discharges occurred during 65 hours continuous operation, the detectors have kept stable operation with high gain. The micro-PIC is a useful detector for many applications e.g. X-ray, gamma ray, and charged particle imaging. The micro electrode structure allows us to measure directions of primary electrons due to incident X-rays or gamma rays, which provide a strong method for X-ray polarimetry and gamma-ray imaging.
@article{arxiv.hep-ex/0301008,
title = {Performance of large area Micro Pixel Chamber},
author = {T. Nagayoshi and H. Kubo and K. Miuchi and A. Ochi and R. Orito and A. Takada and T. Tanimori and M. Ueno},
journal= {arXiv preprint arXiv:hep-ex/0301008},
year = {2015}
}
Comments
4 pages, 8 figures, to appear in the proceedings of 6th International Conference on Position Sensitive Detectors, 9-13 Sep 2002, Leicester, UK (Nucl. Instr. and Meth. A)