Over 10000 channels from the CMS tile/fiber hadronic calorimeter (The CMS Hadron Calorimeter TDR, CERN/LHCC 97-31, June 20, 1997) will be read out by custom 19 and 73-channel HPD's in a 4T field. Experimental constraints on the tube design have produced a faster tube with a larger active area and minimum accelerating gap. Quality assurance stations have been developed for fast processing of 600 tubes. Registration to 50 μm is done in situ, providing a custom collar with alignment pins which can be mated to a universal cookie. Lifetime measurements reveal details on aging, but operation is within CMS specifications.
|Original language||English (US)|
|Number of pages||6|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|State||Published - Mar 11 2000|
|Event||The 2nd International Conference on New Developments in Photodetection - Beaune, France|
Duration: Jun 21 1999 → Jun 25 1999