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The NA48 LKr calorimeter readout electronics

  • A. Gianoli
  • , F. Bal
  • , G. Barr
  • , P. Brodier-Youstone
  • , P. Buchholz
  • , A. Ceccucci
  • , C. Cerri
  • , A. Chlopik
  • , F. Costantini
  • , R. Fantechi
  • , E. Formenti
  • , W. Funk
  • , S. Giudici
  • , B. Gorini
  • , Z. Guzik
  • , B. Hallgren
  • , Y. Kozhevnikov
  • , W. Iwansky
  • , C. De La Taille
  • , A. Lacourt
  • G. Laverriere, C. Ljuslin, L. Mannelli, G. Martin-Chassa, M. Martini, A. Papi, N. Seguin-Moseau, M. Sozzi, J. C. Tarle, M. Velasco, O. Vossnack, H. Wahl, M. Ziolkowsky
  • European Organization for Nuclear Research
  • Sezione INFN di Ferrara
  • University of Dortmund
  • University of Turin
  • Scuola Normale Superiore di Pisa
  • Soltan Institute for Nuclear Studies
  • Université Paris-Sud
  • Sezione di Roma
  • INFN Sezione di Perugia
  • Universität Siegen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The NA48 experiment at the CERN SPS accelerator is making a measurement of the direct CP violation parameter ϵ'/ϵ by comparing the four rates of decay of KS and KL into 2π0 and π+π/sup -/. To reconstruct the decays into 2π0 the information from the almost 13500 channels of a quasi-homogeneous liquid krypton electromagnetic calorimeter is used. The readout electronics of the calorimeter has been designed to provide a dynamic range from a few MeV to about 50 GeV energy deposition per cell, and to sustain a high rate of incident particles. The system is made by cold charge preamplifiers (working at 120°K), low-noise fast shapers followed by digitizer electronics at 40 MHz sampling rate that employs a gain switching technique to expand the dynamic range, where the gain can be selected for each sample individually (i.e. every 25 ns). To reduce the amount of data collected the system contains a zero suppression circuit based on halo expansion.

Original languageEnglish
Title of host publicationSANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999
EditorsStuart C. Schaller
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages110-115
Number of pages6
ISBN (Electronic)078035463X, 9780780354630
DOIs
Publication statusPublished - 1 Jan 1999
Externally publishedYes
Event11th IEEE NPSS Real Time Conference - Computer Applications in Nuclear Particle and Plasma Physics, RT 1999 - Santa Fe, United States
Duration: 14 Jun 199918 Jun 1999

Publication series

NameSANTA FE 1999 - 11th IEEE NPSS Real Time Conference, Conference Record, RT 1999

Conference

Conference11th IEEE NPSS Real Time Conference - Computer Applications in Nuclear Particle and Plasma Physics, RT 1999
Country/TerritoryUnited States
CitySanta Fe
Period14/06/9918/06/99

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