Author/Authors :
Chaturvedi، نويسنده , , U. and Favara، نويسنده , , A. and Gataullin، نويسنده , , M. and Gratta، نويسنده , , G. and Kirkby، نويسنده , , D. and Lu، نويسنده , , W. and Newman، نويسنده , , H. and Shvorob، نويسنده , , A. and Tully، نويسنده , , C. and Zhu، نويسنده , , R.، نويسنده ,
Abstract :
An improved calibration technique based on a radio-frequency-quadrupole (RFQ) accelerator is presented. A high-intensity flux of 17.6 MeV photons, produced by radiative capture of 1.85 MeV protons from the RFQ in a lithium target, is used to calibrate in situ 11 000 crystals of the L3 BGO calorimeter. We present results obtained for the calibration of 1997–1999 L3 data samples. For the first time a calibration precision better than 0.5% is reached for the entire BGO calorimeter. The importance of such a technique is also outlined in view of extensive use of crystal calorimetry at the LHC.
