Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published April 2016 | public
Journal Article

Monitoring LSO/LYSO Crystal Calorimeters


LSO/LYSO crystals were chosen by the SuperB, Mu2e and COMET experiments to construct total absorption electromagnetic calorimeters. They were also proposed as the active medium for a Shashlik calorimeter which was one of the two options proposed for the CMS forward calorimeter upgrade at the proposed HL-LHC. Because of the severe radiation environment expected at the HL-LHC, precision light monitoring is crucial for keeping excellent energy resolution promised by LYSO crystals. This paper discusses the wavelength choice for monitoring LYSO based crystal calorimeters. γ-ray induced absorption and light output loss were measured for 20 cm long crystals from five different vendors. Monitoring sensitivity and divergence are analyzed. Two approaches using excitation and emission light and their practical implementations in a beam test at Fermilab are discussed. The response of an LYSO/W Shashlik calorimeter cell after a γ-ray irradiation of 90 Mrad is also presented.

Additional Information

© 2015 IEEE. Manuscript received July 20, 2015; revised November 16, 2015; accepted December 15, 2015. Date of publication March 30, 2016; date of current version April 15, 2016. This work was supported in part by the U.S. Department of Energy Grant DE-SC0011925.

Additional details

August 20, 2023
October 18, 2023