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Proceedings Paper

Radiation damage studies of optical link components for applications in future high-energy physics experiments
Author(s): Karl A. Gill; Christina Aguilar; C. Azvedo; Vincent Paul Arbet-Engels; Jeremy Batten; Giovanni Cervelli; Robert Grabit; Fredrik B. H. Jensen; Chantal Mommaert; Jan Troska; Francois Vasey
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Paper Abstract

Optical data links are being developed at CERN for use in the tracking system of the Compact Muon Solenoid (CMS) experiment to be operated at the future CERN Large Hadron Collider. The radiation environment will be severe in the CMS tracker; simulations predict hadronic fluences > 1014/cm2 over an experimental lifetime of ten years, consisting of a mixture of neutrons, pions and protons over a wide energy spectrum, plus an ionizing dose of approximately 100 kGy. Candidate optical link components must therefore be qualified for sufficient radiation hardness. Results are presented for commercially available InGaAsP lasers and InGaAs p-i-n photodiodes irradiated with 330 MeV pions up to 5.4 X 1014 (pi) /cm2. The evolution of the laser threshold and efficiency with fluence is presented, in addition to the leakage current and photocurrent in the photodiodes. Comparisons are drawn with previous irradiation tests on identical devices using 6 MeV neutrons and 24 GeV protons, and ionizing damage due to 60Co gamma rays.

Paper Details

Date Published: 13 October 1998
PDF: 11 pages
Proc. SPIE 3440, Photonics for Space Environments VI, (13 October 1998); doi: 10.1117/12.326686
Show Author Affiliations
Karl A. Gill, CERN (Switzerland)
Christina Aguilar, CERN (Switzerland)
C. Azvedo, CERN (Switzerland)
Vincent Paul Arbet-Engels, CERN (Switzerland)
Jeremy Batten, Imperial College of Science, Technology and Medicine (United Kingdom)
Giovanni Cervelli, CERN (Switzerland)
Robert Grabit, CERN (Switzerland)
Fredrik B. H. Jensen, CERN (Switzerland)
Chantal Mommaert, CERN (Switzerland)
Jan Troska, Imperial College of Science, Technology and Medicine (Switzerland)
Francois Vasey, CERN (Switzerland)

Published in SPIE Proceedings Vol. 3440:
Photonics for Space Environments VI
Edward W. Taylor, Editor(s)

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