Published December 21, 2012
| Version public
Journal Article
A Diode-Pumped Solid State Blue Laser for Monitoring the CMS Lead Tungstate Crystal Calorimeter at the LHC
Abstract
Monitoring the changes in channel response is crucial to maintain the energy resolution of the CMS electromagnetic calorimeter. A new diode-pumped solid state blue laser was commissioned and installed at CERN for 2012 operation. This laser has a simple structure and is more reliable than the existing lamp-pumped lasers used by the monitoring system. The stability of critical parameters, such as the pulse energy, width and centre timing, is much better than that of the lamp-pumped lasers. The characteristics of this blue laser are described. Its performance in-situ at LHC is elaborated. The prospects for improving the light monitoring precision are discussed.
Additional Information
© 2013 Published under licence by IOP Publishing Ltd. The authors would like to thank CMS ECAL colleagues for the collaborative effort on the work presented in this paper. This work was supported in part by the US Department of Energy Grant DE-FG03-92-ER40701.Additional details
Identifiers
- Eprint ID
- 37608
- DOI
- 10.1088/1742-6596/404/1/012042
- Resolver ID
- CaltechAUTHORS:20130325-092358425
Related works
- Describes
- 10.1088/1742-6596/404/1/012042 (DOI)
Funding
- Department of Energy (DOE)
- DE-FG03-92-ER40701
Dates
- Created
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2013-04-08Created from EPrint's datestamp field
- Updated
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2022-07-12Created from EPrint's last_modified field