A study on ion initiated photomultiplier afterpulses

被引：27

作者：

Akchurin, Nural ^{[1
]}

Kim, Heejong ^{[1
]}

机构：

[1] Texas Tech Univ, Dept Phys, Lubbock, TX 79409 USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2007年 / 574卷 / 01期

关键词：

photomultiplier tube; afterpulse; helium ion;

D O I：

10.1016/j.nima.2007.01.093

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Ions originating from the ionization of the gas impurities by the electrons inside the photomultiplier tube are generally responsible for the delayed pulses that arrive several hundred nanoseconds after the main pulse. These afterpulses are studied in detail for a Hamamatsu PMT (R7525). Their timing, amplitude, rate and high-voltage dependence are measured and monitored in a helium-rich environment for an extended period. The afterpulse rate due to helium is determined to be 5-10 x 10(-4) per ppm per photoelectron. The characteristic afterpulse features are that their rate linearly depends on the main pulse charge but the afterpulse charge itself is essentially independent of it. We discuss the timing distribution and the origin of these afterpulses. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：121 / 126

页数：6

共 13 条

[1] HELIUM DIFFUSION THROUGH GLASS [J].