Acoustic Studies for Alpha Background Rejection in Dark Matter Bubble Chamber Detectors

被引：2
|
作者：
Bou-Cabo, M.
Felis, I.
Ardid, M.
机构：
来源：
LOW RADIOACTIVITY TECHNIQUES 2013 (LRT 2013) | 2013年 / 1549卷
关键词：
Dark Matter; Bubble Chamber; Acoustics test bench;
D O I：
10.1063/1.4818095
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
COUPP (Chicagoland Observatory for Underground Particle Physics) is an experiment with bubble chambers able to detect dark matter directly either with Spin-Dependent or with Spin-Independent interactions. The target material is a superheated liquid (usually CF3I) that can be bubble nucleated due to nuclear recoils produced by elastic collisions of dark matter particles. The bubble growth inside the chamber is accompanied with an acoustic signature. The acoustic technique has been successfully used to have a good alpha discrimination (about 99%). In this paper, we present different studies and results related with the characterization of the acoustic properties of the detector and the different phenomena involved in the acoustic measurements of the bubble growth, such as sound generation, sound transmission and optimization of piezoelectric transducers.
引用
收藏
页码：142 / 147
页数：6
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