The Outer Tracker of HERA-B

被引：10

作者：

Hohlmann, M ^{[1
]}

机构：

[1] Deutsch Elektronensynchrotron, D-22607 Hamburg, Germany

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2001年 / 461卷 / 1-3期

关键词：

CP violation in neutral B system; fixed-target; pocalon-C foil; malter effect; etching of gold-plated tungsten wires;

D O I：

10.1016/S0168-9002(00)01162-1

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The Outer Tracker of the HERA-B experiment at DESY is a gaseous detector that provides tracking of charged particles over a large volume in a high-rate, hadronic environment. The radiation load at 40 MHz interaction rate is comparable to what will be encountered by large trackers in future LHC experiments. The Outer Tracker allows pattern recognition for event reconstruction, momentum measurement, and highly selective triggering on dileptons from j/psi decays. Its wire-chamber modules comprise 110,000 honeycomb drift cells of up to 4.5m length operating with an Ar/CF4/CO2 gas mixture. The detector was fully installed in January 2000 and is currently operating in HERA-B's first physics run. During detector development different types of severe aging effects were observed. The solutions to the aging problems, detector construction, and detector performance during the early commissioning phase are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：21 / 24

页数：4