Impact of the positive ion current on large size neutrino detectors and delayed photon emission
Impact of the positive ion current on large size neutrino detectors and delayed photon emission
复制标题
正离子流对大尺寸中微子探测器和延迟光子发射的影响
DOI：
10.1088/1748-0221/13/04/c04015
复制
发表时间：
2017
影响因子：
1.3
通讯作者：
L. Romero
中科院分区：
文献类型：
--
作者：
R. Santorelli;S. di Luise;E. Sanchez Garcia;P. G. Abia;T. Lux;V. Pesudo;L. Romero
考虑到它们在液氩中相对于电子的小迁移率系数，离子在装有电场的灵敏检测器体积中花费相当长的时间。在中微子物理学的大量氩实验中，我们研究了液态氩时间投影室中正离子流的影响。自由离子和电子之间的不断复合产生电荷信号的猝灭和光子的不断发射，在时间和空间上与物理相互作用无关。这些预测证明了多吨氩探测器的一些潜在问题，特别是在表面操作时。
Given their small mobility coefficient in liquid argon with respect to the electrons, the ions spend a considerably longer time in a sensitive detector volume instrumented with an electric field. We studied the effects of the positive ion current in a liquid argon time projection chamber, in the context of massive argon experiments for neutrino physics. The constant recombination between free ions and electrons produces a quenching of the charge signal and a constant emission of photons, uncorrelated in time and space to the physical interactions. The predictions evidence some potential concerns for multi-ton argon detectors, particularly when operated on surface.