Published May 21, 2011 | Version v1
Journal article Metadata-only

Mirror alignment control for COMPASS RICH-1 detector

Creators

  • 1. INFN, Sezione di Torino and University of East Piemonte, Alessandria (Italy)
  • 2. INFN, Sezione di Trieste, Trieste (Italy)
  • 3. INFN, Sezione di Trieste and University of Trieste, Trieste (Italy)
  • 4. INFN, Sezione di Torino and University of Torino, Torino (Italy)
  • 5. INFN, Sezione di Torino, Torino (Italy)
  • 6. JINR, Dubna (Russian Federation)
  • 7. Charles University, Praga (Czech Republic)

Description

The focusing system of the COMPASS RICH-1 detector consists of two segmented spherical mirror surfaces, formed by 68 hexagonal and 48 pentagonal individual elements. All individual mirrors have two degrees of freedom to adjust the angular alignment in order to obtain a continuous spherical surface. Relative angular misalignments can be monitored on-line by the CLAM method, based on the optical reconstruction of line images. Complementing the CLAM measurements with photogrammetry, the absolute mirror orientation and position in space can be determined too. The method is described, as well as the algorithms used to access the relative and absolute mirror alignment.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.nima.2010.10.149

Additional details

Identifiers

DOI
10.1016/j.nima.2010.10.149;
PII
S0168-9002(10)02438-1;

Publishing Information

Journal Title
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Journal Volume
639
Journal Issue
1
Journal Page Range
p. 219-221
ISSN
0168-9002
CODEN
NIMAER

Conference

Title
7. International workshop on ring imaging Cherenkov detectors
Acronym
RICH2010
Dates
3-7 May 2010
Place
Cassis (France)

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
42097034
Subject category
S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ALGORITHMS; CARBON MONOXIDE; CHERENKOV COUNTERS; COMPASS-D TOKAMAK; DEGREES OF FREEDOM; MIRRORS; SURFACES
Descriptors DEC
CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CLOSED PLASMA DEVICES; MATHEMATICAL LOGIC; MEASURING INSTRUMENTS; OXIDES; OXYGEN COMPOUNDS; RADIATION DETECTORS; THERMONUCLEAR DEVICES; TOKAMAK DEVICES

Optional Information

Copyright
Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.