Title :
Operating characteristics of radiation-hardened silicon pixel detectors for the CMS experiment
Author :
Cho, Hyosung ; Chien, Chih-Yung
Author_Institution :
Dept. of Med. Eng., Yonsei Univ., Seoul, South Korea
fDate :
8/1/2002 12:00:00 AM
Abstract :
The Compact Muon Solenoid (CMS) experiment at the CERN Large Hadron Collider (LHC) will have forward silicon pixel detectors as its innermost tracking device. The pixel devices will be exposed to the harsh radiation environment of the LHC. Prototype silicon pixel detectors have been designed to meet the specification of the CMS experiment. No guard ring is required on the n+ side, and guard rings on the p+ side are always kept active before and after type inversion. The whole n+ side is grounded and connected to readout chips, which greatly simplifies detector assembling and improves the stability of bump-bonded readout chips on the n+ side. Operating characteristics such as the leakage current, the full depletion voltage, and the potential distributions over guard rings were tested using standard techniques. The tests are discussed in this paper.
Keywords :
leakage currents; silicon radiation detectors; CMS experiment; Si; Si pixel detectors; bump-bonded readout chips; full depletion voltage; guard ring; leakage current; n+ side; potential distributions; radiation-hardened; Assembly; Collision mitigation; Large Hadron Collider; Mesons; Prototypes; Radiation detectors; Silicon radiation detectors; Solenoids; Stability; Testing;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2002.801503