MEASUREMENT OF THE TIME DEVELOPMENT OF PARTICLE SHOWERS IN A URANIUM SCINTILLATOR CALORIMETER

被引：9

作者：

CALDWELL, A

HERVAS, L

PARSONS, JA

SCIULLI, F

SIPPACH, W

WAI, L

机构：

[1] Nevis Labs, Columbia University, Irvington, NY 10533

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1993年 / 330卷 / 03期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0168-9002(93)90568-3

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We report on the time evolution of particle showers, as measured in modules of the uranium-scintillator barrel calorimeter of the ZEUS detector. The time development of hadronic showers differs significantly from that of electromagnetic showers, with about 40% of the response to hadronic showers arising from energy depositions which occur late in the shower development. The degree of compensation and the hadronic energy resolution were measured as a function of integration time, giving a value of e/pi = 1.02 +/- 0.01 for a gate width of 100 ns. The possibilities for electron-hadron separation based on the time structure of the shower were studied, with pion rejection factors in excess of 100 being achieved for electron efficiencies greater than 60%. The custom electronics used to perform these measurements samples the calorimeter signal at close to 60 MHz, stores all samples for a period of over 4 mus using analog switched capacitor pipelines, and digitizes the samples for triggered events with 12-bit ADCs.

引用

页码：389 / 404

页数：16

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