The ZEUS calorimeter first level trigger

Conference · Sat Dec 31 00:00:00 EST 1994

OSTI ID:54009

Foudas, C; Dawson, J; Krakauer, D; Talaga, R ^[1]; Ali, I; Behrens, B; Fordham, C; Goussiou, A; Jaworski, M; Lackey, J ^[2]

---

1. Argonne National lab., IL (United States)
2. and others

The authors present results on the efficiency and performance of the ZEUS detector Calorimeter First Level Trigger (CFLT) using data taken during the 1993 HERA physics run. The CFLT is designed to process events in a digital pipeline applying pattern recognition algorithms and fast digital summation techniques in order to collect interesting physics events and reduce background from beam gas interactions. The total FLT efficiency was 98% for neutral current events and 85% for charged current events above Q{sup 2} of 10 GeV{sup 2}. The introduction of the isolated electron trigger increases the CFLT beam gas rejection by a factor of two.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• OSTI ID: 54009
• Report Number(s): LBL-35822; CONF-940492-; ON: DE95004442; TRN: 95:012099
• Resource Relation: Conference: Meeting on computing in high-energy physics, San Francisco, CA (United States), 21-27 Apr 1994; Other Information: PBD: [1994]; Related Information: Is Part Of Proceedings of the conference on computing in high energy physics `94; Loken, S.C. [ed.]; PB: 532 p.
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
99 MATHEMATICS
COMPUTERS
INFORMATION SCIENCE
MANAGEMENT
LAW
MISCELLANEOUS
TRIGGER CIRCUITS
PERFORMANCE
OPERATION
SHOWER COUNTERS
HERA STORAGE RING
RADIATION DETECTORS