Title :
The MGPA electromagnetic calorimeter readout chip for CMS
Author :
Raymond, M. ; Crooks, J. ; French, M. ; Hall, G.
Author_Institution :
High Energy Phys. Group, Imperial Coll., London, UK
fDate :
6/1/2005 12:00:00 AM
Abstract :
The multiple-gain preamplifier (MGPA) is a three-gain channel 0.25 μm CMOS chip matched to the noise and linearity requirements of the electromagnetic calorimeter for the Compact Muon Solenoid (CMS) experiment. A choice of external feedback components to the first-stage amplifier allows the chip to match the different full-scale signal and noise requirements for both barrel and end-cap regions of the detector. For the barrel (end-cap) application the noise is less than 10 000 (3,500) electrons at a peaking time of 40 ns and an integral nonlinearity of approximately ±0.1% full-scale is achieved for all three gain ranges. Details of the design and performance are presented, including measurements of nonlinearity, pulse-shape matching, noise, and radiation tolerance.
Keywords :
CMOS integrated circuits; analogue integrated circuits; noise; particle calorimetry; position sensitive particle detectors; preamplifiers; readout electronics; solid scintillation detectors; 0.25 micron; CMOS analog integrated circuits; CMS experiment; Compact Muon Solenoid; barrel region; electromagnetic calorimeter readout chip; end-cap region; external feedback components; first-stage amplifier; full-scale signal requirement; integral nonlinearity; lead tungstate scintillating crystals; multiple-gain preamplifier; noise; pulse-shape matching; radiation detectors; radiation tolerance; three-gain channel; Collision mitigation; Detectors; Electromagnetic interference; Electrons; Feedback; Linearity; Mesons; Preamplifiers; Pulse measurements; Solenoids; CMOS analog integrated circuits; Calorimetry; radiation detectors;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2005.850979
