The CLEO-III trigger: analog and digital calorimetry

Author

Bebek, C. ; Bergfeld, T.J. ; Ernst, J.A. ; Gollin, G.D. ; Haney, M.J. ; Hans, R.M. ; Johnson, E.E. ; Plager, C.L. ; Sedlack, C. ; Selen, M.A. ; Strohman, C.R. ; Williams, J.

Author_Institution

Dept. of Phys., Illinois Univ., Urbana, IL, USA

Volume

2

fYear

2000

fDate

2000

Firstpage

42719

Abstract

The calorimetry subsystem of the CLEO-III trigger incorporates both analog and digital electronics to provide pipelined trigger information every 42 ns with a latency of approximately 2.5 μs. This paper describes the pipelined signal-processing and pattern-recognition schemes used to provide calorimeter information to the experiment trigger, with somewhat greater emphasis on the analog components of the system. Analog processing is employed to address the quantization error caused by split energy deposition in adjacent calorimeter cells, and digital field programmable gate arrays are used extensively to filter and categorize the calorimeter energy topology. Timing, geographical and energy information are all available for use in the calorimeter trigger

Keywords

drift chambers; field programmable gate arrays; nuclear electronics; particle calorimetry; trigger circuits; CLEO-III trigger; analog calorimetry; calorimeter energy topology; calorimeter trigger; digital calorimetry; digital field programmable gate arrays; pattern-recognition schemes; pipelined signal-processing; pipelined trigger information; quantization error; split energy deposition; Calorimetry; Circuits; Crystals; Detectors; Digital filters; Laboratories; Photodiodes; Physics; Quantization; Tiles;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2000 IEEE

Conference_Location

Lyon

ISSN

1082-3654

Print_ISBN

0-7803-6503-8

Type

conf

DOI

10.1109/NSSMIC.2000.949931

Filename

949931