Initial performance of the VENUS transition radiation detector

N. Terunuma, N. Kanda, M. Sakuda, Y. Chiba, Y. Fukushima, J. Haba, A. Krüger, I. Nakano, S. Nakamura, K. Ogawa, T. Ohsugi, A. Suzuki, Y. Watase

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9 Citations (Scopus)


The VENUS-TRD is a cylindrical transition radiation detector, extending from 127 cm to 157.7 cm radially and 296 cm axially. It is designed to improve the e/π separation capability of the VENUS detector by a factor of 10 in order to complement the lead glass calorimeter. It covers an angular region of |cos θ| < 0.68 and contains four layers of radiators and X-ray chambers. It has been working very stably since it started data-taking at the TRISTAN e+e- storage ring in June, 1991. The pion rejection power (Rπ = 1 επ) at an electron efficiency of 90% is Rπ = 10±1 and 15±2 for isolated tracks with a momentum range of 1 < P < 3 and 3 < P < 10 GeV/c, respectively. It decreases to Rπ = 7±1 for tracks with P > 1 GeV/c in hadronic events due to overlap of the tracks in the chamber cells of the TRD. The VENUS-TRD is the largest TRD to perform in colliding beam experiments.

Original languageEnglish
Pages (from-to)471-476
Number of pages6
JournalNuclear Inst. and Methods in Physics Research, A
Issue number1-2
Publication statusPublished - Dec 1 1992

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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