학술논문
CMS electromagnetic calorimeter low voltage system for the front end electronics
Document Type
Conference
Author
Source
2003 IEEE Nuclear Science Symposium. Conference Record (IEEE Cat. No.03CH37515) Nuclear science symposium Nuclear Science Symposium Conference Record, 2003 IEEE. 2:1118-1122 Vol.2 2003
Subject
Language
ISSN
1082-3654
Abstract
The CMS electromagnetic calorimeter front-end electronics requires about 50000 amps of current. The custom designed chips with 0.25-micron technology run at 2.5 V. The delivery of this current / power to the front-end cards by copper buses creates a situation where we have ground potential differences along the distribution buses. This may affect the noise performance of the scintillation light detection by APDs. Substantial power is wasted in the delivery system then consumed by front-end electronics boards. The electronics works in high radiation environment and in 4T magnetic field.