CHICSi - a compact ultra-high vacuum compatible detector system for nuclear reaction experiments at storage rings. I. General structure, mechanics and UHV compatibility

L Westerberg, Vladimir Avdeichikov, Lars Carlén, Pavel Golubev, Bo Jakobsson, C Rouki, A Siwek, EJ van Veldhuizen, Harry J Whitlow

Research output: Contribution to journalArticlepeer-review

9 Citations (SciVal)

Abstract

CELSIUS Heavy-Ion Collision Silicon detector system (CHICSi) is a large solid angle, barrel-shaped detector system, housing up to 600 detector telescopes arranged in rotational symmetry around the beam axis. CHICSi measures charged particles and fragments from nuclear reactions. It operates at internal targets of storage rings. In order to optimize space and momentum-space coverage and minimize the low-energy detection limits, CHICSi is designed for use in ultra-high vacuum (UHV, similar to 10(-8) Pa) inside a cluster-jet target chamber. This calls for materials in mechanical support, detectors, Very Large Scale Integrated (VLSI) electronics, connectors, cables and other signal transport devices with very low outgassing. Two auxiliary detector systems, which will operate in coincidence with CHICSi, a heavy-recoil, time-of-flight system (HR-TOF) also placed inside the target chamber and a projectile fragmentation wall (PF-WALL) located outside the chamber, have also been constructed. In total, this combined system registers more than 80% of all charged particles and fragments from typical heavy-ion reactions at energies of a few hundreds of MeV per nucleon. (C) 2003 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)84-95
JournalNuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Volume500
Issue number1-3
DOIs
Publication statusPublished - 2003

Subject classification (UKÄ)

  • Accelerator Physics and Instrumentation

Keywords

  • large
  • ultra-high vacuum compatibility
  • solid angle
  • GSO scintillators
  • thin silicon detectors
  • multi-detector system

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