dorsal/arxiv
View SchemaThe Electronics of the H1 Lead/Scintillating-Fibre Calorimeters
| Authors | H1 SpaCal Group, R. -D. Appuhn et al |
|---|---|
| Categories | |
| ArXiv ID | physics/9812042 |
| URL | https://arxiv.org/abs/physics/9812042 |
| DOI | 10.1016/S0168-9002(99)00012-1 |
| Journal | Nucl.Instrum.Meth. A426 (1999) 518-537 |
Abstract
The electronic system developed for the SpaCal lead/scintillating-fibre calorimeters of the H1 detector in operation at the HERA ep collider is described in detail and the performance achieved during H1 data-taking is presented. The 10 MHz bunch crossing rate of HERA puts severe constraints on the requirements of the electronics. The energy and time readout are performed respectively with a 14-bit dynamic range and with a resolution of about 0.4 ns. The trigger branch consists of a nanosecond-resolution calorimetric time-of-flight for background rejection and an electron trigger based on analog `sliding windows'. The on-line background rejection currently achieved is o(10**6). The electron trigger allows a low energy trigger threshold to be set at about 0.50 +/- 0.08 (RMS) GeV with an efficiency >99.9%. The energy and time performance of the readout and trigger electronics is based on a newly-developed low noise (sigma_noise ca. 0.4 MeV) wideband (f < 200 MHz) preamplifier located at the output of the photomultipliers which are used for the fibre light readout in the ca. 1 Tesla magnetic field of H1.
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"abstract": "The electronic system developed for the SpaCal lead/scintillating-fibre\ncalorimeters of the H1 detector in operation at the HERA ep collider is\ndescribed in detail and the performance achieved during H1 data-taking is\npresented. The 10 MHz bunch crossing rate of HERA puts severe constraints on\nthe requirements of the electronics. The energy and time readout are performed\nrespectively with a 14-bit dynamic range and with a resolution of about 0.4 ns.\nThe trigger branch consists of a nanosecond-resolution calorimetric\ntime-of-flight for background rejection and an electron trigger based on analog\n`sliding windows\u0027. The on-line background rejection currently achieved is\no(10**6). The electron trigger allows a low energy trigger threshold to be set\nat about 0.50 +/- 0.08 (RMS) GeV with an efficiency \u003e99.9%. The energy and time\nperformance of the readout and trigger electronics is based on a\nnewly-developed low noise (sigma_noise ca. 0.4 MeV) wideband (f \u003c 200 MHz)\npreamplifier located at the output of the photomultipliers which are used for\nthe fibre light readout in the ca. 1 Tesla magnetic field of H1.",
"arxiv_id": "physics/9812042",
"authors": [
"H1 SpaCal Group",
"R. -D. Appuhn et al"
],
"categories": [
"physics.ins-det"
],
"doi": "10.1016/S0168-9002(99)00012-1",
"journal_ref": "Nucl.Instrum.Meth. A426 (1999) 518-537",
"title": "The Electronics of the H1 Lead/Scintillating-Fibre Calorimeters",
"url": "https://arxiv.org/abs/physics/9812042"
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