CMS electromagnetic calorimeter low voltage system for the front end electronics

Author

Dhawan, S.K. ; Betev, B. ; Djambazov, L. ; Dröge, M. ; Lustermann, W. ; Nardulli, A. ; Pestalozzi, M. ; Sharp, P.

Author_Institution

Yale Univ., New Haven, CT, USA

Volume

2

fYear

2003

fDate

19-25 Oct. 2003

Firstpage

1118

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.

Keywords

nuclear electronics; particle calorimetry; scintillation counters; 0.25 micron; 2.5 V; CMS electromagnetic calorimeter low voltage system; custom designed chips; distribution buses; front end electronics; ground potential differences; scintillation light detection; Clocks; Collision mitigation; Control systems; Crystals; Detectors; Iron; Low voltage; Optical buffering; Optical fiber communication; Power supplies;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2003 IEEE

ISSN

1082-3654

Print_ISBN

0-7803-8257-9

Type

conf

DOI

10.1109/NSSMIC.2003.1351888

Filename

1351888