Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8170595 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2016 | 5 Pages |
Abstract
We constructed a hadron blind detector (HBD) using a finely segmented pad readout. The finely segmented pad readout enabled us to adopt an advanced particle identification method which applies a threshold to the number of pad hits in addition to the total amount of collected charge. The responses of the detector to electrons and pions were evaluated using a negatively charged secondary beam at 1.0Â GeV/c containing 20% electrons at the J-PARC K1.1BR beam line. We observed 7.3 photoelectrons per incident electron. Using the advanced particle identification method, an electron detection efficiency of 83% was achieved with a pion rejection factor of 120. The method improved the pion rejection by approximately a factor of five, compared to the one which just applies a threshold to the amount of collected charge. The newly introduced finely segmented pad readout was found to be effective in rejecting pions.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Koki Kanno, Kazuya Aoki, Yoki Aramaki, Hideto En׳yo, Daisuke Kawama, Yusuke Komatsu, Shinichi Masumoto, Wataru Nakai, Yuki Obara, Kyoichiro Ozawa, Michiko Sekimoto, Takuya Shibukawa, Tomonori Takahashi, Yosuke Watanabe, Satoshi Yokkaichi,