Development of a hadron blind detector using a finely segmented pad readout
Development of a hadron blind detector using a finely segmented pad readout
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使用精细分段垫读数开发强子盲探测器
DOI：
10.1016/j.nima.2016.02.063
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Satoshi Yokkaichi
中科院分区：
文献类型：
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作者：
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
我们用精细分段的读出板构造了一个强子盲探测器。精细分段的焊盘读出使我们能够采用先进的颗粒识别方法，该方法除了对收集的电荷总量之外，还对焊盘命中的数量施加阈值。在J-PARC K1.1BR束线上，使用1.0 GeV/c的含20%电子的带负电荷的次级束来评估探测器对电子和π介子的响应。我们观察到每个入射电子有7.3个光电子，利用先进的粒子识别方法，电子探测效率达到83%，π介子抑制因子为120。与只对收集的电荷量施加阈值的方法相比，该方法将π介子抑制提高了大约五倍。新引入的细分垫读出被认为是有效的拒绝π介子。
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 1.0 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.