Development of a hadron blind detector using a finely segmented pad readout

Development of a hadron blind detector using a finely segmented pad readout

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...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 819; pp. 20 - 24
Main Authors: Kanno, Koki, Aoki, Kazuya, Aramaki, Yoki, En׳yo, Hideto, Kawama, Daisuke, Komatsu, Yusuke, Masumoto, Shinichi, Nakai, Wataru, Obara, Yuki, Ozawa, Kyoichiro, Sekimoto, Michiko, Shibukawa, Takuya, Takahashi, Tomonori, Watanabe, Yosuke, Yokkaichi, Satoshi
Format: Journal Article
Language:English
Published: Elsevier B.V 21-05-2016
Subjects:
Blinds
Charge
CsI photocathode
Detectors
GEM
Hadron blind detector
Hadrons
HBD
Identification methods
Pions
Rejection
Thresholds
UV photon detector
HBD
Hadron blind detector
GEM
CsI photocathode
UV photon detector
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Summary: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 1.0GeV/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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2016.02.063