Author/Authors :
Anfreville، نويسنده , , M. and Bailleux، نويسنده , , Robert D. and Bard، نويسنده , , J.P. and Bornheim، نويسنده , , A. and Bouchand، نويسنده , , C. and Bougamont، نويسنده , , E. Gil Boyer، نويسنده , , M. and Chipaux، نويسنده , , R. and Daponte-Puill، نويسنده , , V. and Dejardin، نويسنده , , M. and Faure، نويسنده , , J.L. and Gras، نويسنده , , P. and Jarry، نويسنده , , P. and Jeanney، نويسنده , , C. and Joudon، نويسنده , , A. and Pansart، نويسنده ,
Abstract :
We report on the multiple wavelength laser monitoring system designed for the compact muon solenoid (CMS) lead tungstate crystal calorimeter. Results are presented for the test-beam performance of the system designed to achieve ⩽0.2% relative optical transmittance inter-calibration for 75 848 lead tungstate crystals. The system cycles continuously over the calorimeter to follow each crystalʹs evolution under the irradiation and recovery periods foreseen during operation at the LHC.
Keywords :
optical transmittance , Laser , stability , Scintillating crystal , Calorimeter , MONITORING SYSTEM
