Background reduction using single- photoelectron counting for WIMP search
Background reduction using single- photoelectron counting for WIMP search
复制标题
使用单光电子计数减少背景以进行 WIMP 搜索
DOI：
10.1016/j.nima.2012.12.083
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
I. Ogawa
中科院分区：
文献类型：
--
作者：
Sun;Haomin;Kunugi;Tomoaki;Wu;Dazhuan;Zhang;Hongna;Nakamura;Hideo;Shen;Xiuzhong;I. Ogawa
我们开发了一种新的基于闪烁体单光电子计数的背景还原方法，用于WIMP搜索实验。我们将这种方法引入到我们的检测器系统ELEGANT VI中，该系统在所有方向（4π）上都有一个主动屏蔽，使用脉冲高度，或者相当于两个（左和右）光电倍增管连接到caf2闪烁体之间的光电子数的差异。数字分布是由二项式函数唯一描述的，通过二项式函数，我们开发了无二义背景减法。与电荷敏感ADC相比，该方法进一步减少了背景，提高了搜索wimp的灵敏度。
We have developed a new background reduction method based on single photoelectron counting of scintillators for the WIMP search experiment. We introduced this method to our detector system ELEGANT VI, which has an active shield in all directions (4π) using a pulse height or, equivalently, the difference in the number of photoelectrons between two (left and right) photomultiplier tubes attached to CaF2scintillators. The number distribution is uniquely described by a binomial function, via which we developed the unambiguous background subtraction method. This method reduces the backgrounds further compared to charge-sensitive ADC and offers improved sensitivity for the search for WIMPs.