The suppression of the internal detector background in 3He counters through pulse shape discrimination methods is becoming an area of interest for a growing number of experiments that want to detect low event rate signals. We discuss two discrimination methods for signals coming from high-pressure (thus high efficiency) 3He counters read out through charge sensitive preamplifiers. We present a digital filter to convert the integrated signal to a current pulse. The application of a discrimination method based on the peak shape suppresses the internal alpha-induced background by > 98.5%. In addition a semi-empirical model of the signal creation in 3He counters is presented and compared to experimental data.
Improved pulse shape discrimination for high pressure 3He counters / J. Balibrea-Correa, G.F. Ciani, R. Buompane, F. Cavanna, L. Csedreki, R. Depalo, F. Ferraro, A. Best. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 906(2018), pp. 103-109.
|Titolo:||Improved pulse shape discrimination for high pressure 3He counters|
|Parole Chiave:||3; He detectors; Monte Carlo detector response; Pulse shape discrimination|
|Settore Scientifico Disciplinare:||Settore FIS/04 - Fisica Nucleare e Subnucleare|
|Data di pubblicazione:||2018|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.nima.2018.07.086|
|Appare nelle tipologie:||01 - Articolo su periodico|