A pressurized gas Cherenkov detector

S. Chinomi, K. Hisayasu, Y. Kurihara, K. Maeda, E. Nakano, T. Ohshima, H. Sakaue, S. Saito, T. Takahashi, Y. Teramoto, S. Uno

Research output: Contribution to conferencePaperpeer-review


We report the performance of a pressurized gas Cherenkov detector with small effective material, tested by pion beams at KEK. With its small material (9.1% r.l.). the detector is suitable for particle identification placed at the upstream of electromagnetic calorimeters. The radiator is sulfur hexafluoride. SF6 (2.0 MPa), contained in a cylindrical aluminum vessel. 2 m long, 10 cm in diameter, and 2 mm thick. A flat elliptical mirror (45 degrees) was tested for transporting Cherenkov photons to photomultiplier tubes for the tracks in the central region. The measured transmission of ultra-pure sulfur hexafluoride is 72% (200 nm) and 97% (300 nm) per 1 m path at 2.0 MPa. Using the pion beams (0.76 - 4.0 GeV/c), the number of photoelectrons were measured for different incident positions, angles and momenta. Thresholds of pion momentum were measured as a function of pressures (0.5 - 1.66 MPa), from which the refractive indexes of SF6 were derived at different pressures. The lowest threshold momentum measured was 0.73 GeV/c at 1.66 MPa, corresponding to the refractive index (n - 1) of 18.1 × 10-3.

Original languageEnglish
Publication statusPublished - 2000
Externally publishedYes
Event2000 IEEE Nuclear Science Symposium Conference Record - Lyon, France
Duration: 2000 Oct 152000 Oct 20


Other2000 IEEE Nuclear Science Symposium Conference Record

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging


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