The ZEUS calorimeter first level trigger

W. H. Smith, I. Ali, B. Behrens, C. Fordham, C. Foudas, A. Goussiou, M. Jaworski, T. Kinnel, J. Lackey, P. Robl, S. Silverstein, J. W. Dawson, D. A. Krakauer, R. L. Talaga, J. L. Schlereth

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The design of the ZEUS Calorimeter First Level Trigger (CFLT) is presented. The CFLT utilizes a pipelined architecture to provide trigger data for a Global First Level Trigger decision 5 μs after each beam crossing, occurring every 96 ns. The charges from 13 K phototubes are summed into 1792 trigger tower pulseheights which are digitized by flash ADCs. The digital values are linearized, stored and used for sums and pattern tests. Summary data is forwarded to the Global First Level Trigger for each crossing 2 μs after the crossing occurred. The CFLT determines the total energy, the total transverse energy, the missing energy, and the energy and number of isolated electrons and muons. It also provides information on the electromagnetic and hadronic energy deposited in various regions of the calorimeter. The CFLT has kept the experimental trigger rate below ≈ 200 Hz at the highest luminosity experienced at HERA. Performance studies suggest that the CFLT will keep the trigger rate below 1 kHz against a rate of proton-beam gas interactions on the order of the 100 kHz expected at design luminosity.

Original languageEnglish
Pages (from-to)278-294
Number of pages17
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume355
Issue number2-3
DOIs
Publication statusPublished - Feb 15 1995

Fingerprint

Calorimeters
calorimeters
actuators
Luminance
Phototubes
Proton beams
Beam plasma interactions
Towers
luminosity
energy
phototubes
Electrons
towers
proton beams
Gases
flash
muons
electromagnetism

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

The ZEUS calorimeter first level trigger. / Smith, W. H.; Ali, I.; Behrens, B.; Fordham, C.; Foudas, C.; Goussiou, A.; Jaworski, M.; Kinnel, T.; Lackey, J.; Robl, P.; Silverstein, S.; Dawson, J. W.; Krakauer, D. A.; Talaga, R. L.; Schlereth, J. L.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 355, No. 2-3, 15.02.1995, p. 278-294.

Research output: Contribution to journalArticle

Smith, WH, Ali, I, Behrens, B, Fordham, C, Foudas, C, Goussiou, A, Jaworski, M, Kinnel, T, Lackey, J, Robl, P, Silverstein, S, Dawson, JW, Krakauer, DA, Talaga, RL & Schlereth, JL 1995, 'The ZEUS calorimeter first level trigger', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 355, no. 2-3, pp. 278-294. https://doi.org/10.1016/0168-9002(94)01163-X
Smith, W. H. ; Ali, I. ; Behrens, B. ; Fordham, C. ; Foudas, C. ; Goussiou, A. ; Jaworski, M. ; Kinnel, T. ; Lackey, J. ; Robl, P. ; Silverstein, S. ; Dawson, J. W. ; Krakauer, D. A. ; Talaga, R. L. ; Schlereth, J. L. / The ZEUS calorimeter first level trigger. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 1995 ; Vol. 355, No. 2-3. pp. 278-294.
@article{cae4dde79f864633b65c78a7c550f6fc,
title = "The ZEUS calorimeter first level trigger",
abstract = "The design of the ZEUS Calorimeter First Level Trigger (CFLT) is presented. The CFLT utilizes a pipelined architecture to provide trigger data for a Global First Level Trigger decision 5 μs after each beam crossing, occurring every 96 ns. The charges from 13 K phototubes are summed into 1792 trigger tower pulseheights which are digitized by flash ADCs. The digital values are linearized, stored and used for sums and pattern tests. Summary data is forwarded to the Global First Level Trigger for each crossing 2 μs after the crossing occurred. The CFLT determines the total energy, the total transverse energy, the missing energy, and the energy and number of isolated electrons and muons. It also provides information on the electromagnetic and hadronic energy deposited in various regions of the calorimeter. The CFLT has kept the experimental trigger rate below ≈ 200 Hz at the highest luminosity experienced at HERA. Performance studies suggest that the CFLT will keep the trigger rate below 1 kHz against a rate of proton-beam gas interactions on the order of the 100 kHz expected at design luminosity.",
author = "Smith, {W. H.} and I. Ali and B. Behrens and C. Fordham and C. Foudas and A. Goussiou and M. Jaworski and T. Kinnel and J. Lackey and P. Robl and S. Silverstein and Dawson, {J. W.} and Krakauer, {D. A.} and Talaga, {R. L.} and Schlereth, {J. L.}",
year = "1995",
month = "2",
day = "15",
doi = "10.1016/0168-9002(94)01163-X",
language = "English",
volume = "355",
pages = "278--294",
journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
issn = "0168-9002",
publisher = "Elsevier",
number = "2-3",

}

TY - JOUR

T1 - The ZEUS calorimeter first level trigger

AU - Smith, W. H.

AU - Ali, I.

AU - Behrens, B.

AU - Fordham, C.

AU - Foudas, C.

AU - Goussiou, A.

AU - Jaworski, M.

AU - Kinnel, T.

AU - Lackey, J.

AU - Robl, P.

AU - Silverstein, S.

AU - Dawson, J. W.

AU - Krakauer, D. A.

AU - Talaga, R. L.

AU - Schlereth, J. L.

PY - 1995/2/15

Y1 - 1995/2/15

N2 - The design of the ZEUS Calorimeter First Level Trigger (CFLT) is presented. The CFLT utilizes a pipelined architecture to provide trigger data for a Global First Level Trigger decision 5 μs after each beam crossing, occurring every 96 ns. The charges from 13 K phototubes are summed into 1792 trigger tower pulseheights which are digitized by flash ADCs. The digital values are linearized, stored and used for sums and pattern tests. Summary data is forwarded to the Global First Level Trigger for each crossing 2 μs after the crossing occurred. The CFLT determines the total energy, the total transverse energy, the missing energy, and the energy and number of isolated electrons and muons. It also provides information on the electromagnetic and hadronic energy deposited in various regions of the calorimeter. The CFLT has kept the experimental trigger rate below ≈ 200 Hz at the highest luminosity experienced at HERA. Performance studies suggest that the CFLT will keep the trigger rate below 1 kHz against a rate of proton-beam gas interactions on the order of the 100 kHz expected at design luminosity.

AB - The design of the ZEUS Calorimeter First Level Trigger (CFLT) is presented. The CFLT utilizes a pipelined architecture to provide trigger data for a Global First Level Trigger decision 5 μs after each beam crossing, occurring every 96 ns. The charges from 13 K phototubes are summed into 1792 trigger tower pulseheights which are digitized by flash ADCs. The digital values are linearized, stored and used for sums and pattern tests. Summary data is forwarded to the Global First Level Trigger for each crossing 2 μs after the crossing occurred. The CFLT determines the total energy, the total transverse energy, the missing energy, and the energy and number of isolated electrons and muons. It also provides information on the electromagnetic and hadronic energy deposited in various regions of the calorimeter. The CFLT has kept the experimental trigger rate below ≈ 200 Hz at the highest luminosity experienced at HERA. Performance studies suggest that the CFLT will keep the trigger rate below 1 kHz against a rate of proton-beam gas interactions on the order of the 100 kHz expected at design luminosity.

UR - http://www.scopus.com/inward/record.url?scp=0000747435&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000747435&partnerID=8YFLogxK

U2 - 10.1016/0168-9002(94)01163-X

DO - 10.1016/0168-9002(94)01163-X

M3 - Article

AN - SCOPUS:0000747435

VL - 355

SP - 278

EP - 294

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

SN - 0168-9002

IS - 2-3

ER -