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The Mark III vertex chamber

  • J. Adler
  • , T. Bolton
  • , K. Bunnell
  • , R. Cassell
  • , E. Cheu
  • , R. Eisele
  • , T. Freese
  • , C. Grab
  • , G. Mazaheri
  • , R. Mir
  • , A. Odian
  • , D. Pitman
  • , W. Stockhausen
  • , W. Toki
  • , F. Villa
  • , W. Wadley
  • , S. Wasserbaech
  • , W. Wisniewski

Research output: Contribution to journalArticlepeer-review

Abstract

We have constructed and installed a pressurized straw vertex chamber in the Mark III experiment at the SLAC e+e- storage ring SPEAR. The chamber consists of 12 concentric layers of straws, arrayed at radii between 5.4 cm and 13.0 cm from the interaction point. There are a total of 640 straws, each 8 mm in diameter and 84 cm long. We obtain an overall spatial resolution of 49 μm for argon-ethane ( 50% 50%) at 3 atm absolute using a cosmic ray data sample. The effects of gases on various chamber materials have been investigated. Chamber lifetime studies have been performed. A prototype chamber was used to study the resolution obtained with various gases.

Original languageEnglish (US)
Pages (from-to)42-52
Number of pages11
JournalNuclear Inst. and Methods in Physics Research, A
Volume276
Issue number1-2
DOIs
StatePublished - Mar 15 1989
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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