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. LacourtG. 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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 (US)
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
StatePublished - 1999
Event11th IEEE NPSS Real Time Conference - Computer Applications in Nuclear Particle and Plasma Physics, RT 1999 - Santa Fe, United States
Duration: Jun 14 1999Jun 18 1999

Publication series

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

Other

Other11th IEEE NPSS Real Time Conference - Computer Applications in Nuclear Particle and Plasma Physics, RT 1999
CountryUnited States
CitySanta Fe
Period6/14/996/18/99

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging
  • Nuclear and High Energy Physics
  • Computer Science Applications

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