Published August 15, 1992 | Version v1
Journal article Metadata-only

The laser system for calibration and monotoring of the Opal jet chamber

Creators

  • 1. Physikalisches Inst., Univ. Bonn (Germany)
  • 2. CERN, European Organization for Nuclear Research, Geneva (Switzerland)
  • 3. Physikalisches Inst., Heidelberg (Germany)

Description

In this report we describe the construction and performance of the laser system which was used in Summer 1989 for the initial calibration of the OPAL jet chamber after installation on the LEP beam axis and which has served as a monitoring tool since then. Two Nd:YAG lasers are used to generate 48 high precision double beams which enter the chamber at fixed positions. The main features of the roughly 450 optical components are described and the beam alignment procedures are explained. Results are given for jet chamber calibration constants such as drift velocity, Lorentz angle, and residual sagittas. (orig.)

Additional details

Publishing Information

Journal Title
Nuclear Instruments and Methods in Physics Research. Section A
Journal Volume
320
Journal Issue
1/2
Series
Nucl. Instrum. Methods Phys. Res., Sect. A.
Journal Page Range
183-200
ISSN
0168-9002
CODEN
NIMAE

INIS

Country of Publication
Netherlands
Country of Input or Organization
Netherlands
INIS RN
23087588
Subject category
S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Descriptors DEI
ALIGNMENT; BEAM POSITION; CALIBRATION; CORRECTIONS; DRIFT CHAMBERS; ELECTRON DRIFT; LASER RADIATION; LEP STORAGE RINGS; MIRRORS; MONITORING; MONITORS; NEODYMIUM LASERS; OPTICAL SYSTEMS; PARTICLE TRACKS; TOWNSEND DISCHARGE
Descriptors DEC
AMPLIFIERS; ELECTRIC DISCHARGES; ELECTROMAGNETIC RADIATION; EQUIPMENT; LASERS; MEASURING INSTRUMENTS; MULTIWIRE PROPORTIONAL CHAMBER; PROPORTIONAL COUNTERS; RADIATION DETECTORS; RADIATIONS; SOLID STATE LASERS; STORAGE RINGS