Cosmic ray tests of a GEM-based TPC prototype operated in ArCF 4isobutane gas mixtures

M. Kobayashi, R. Yonamine, T. Tomioka, A. Aoza, H. Bito, K. Fujii, T. Higashi, K. Hiramatsu, K. Ikematsu, A. Ishikawa, Y. Kato, H. Kuroiwa, T. Matsuda, O. Nitoh, H. Ohta, K. Sakai, R. D. Settles, A. Sugiyama, H. Tsuji, T. WatanabeH. Yamaoka, T. Yazu

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


Argon with an admixture of CF4 is expected to be a good candidate for the gas mixture to be used for a time projection chamber (TPC) in the future linear collider experiment because of its small transverse diffusion of drift electrons especially under a strong magnetic field. In order to confirm the superiority of this gas mixture over conventional TPC gases we carried out cosmic ray tests using a GEM-based TPC operated mostly in ArCF 4isobutane mixtures under 01 T axial magnetic fields. The measured gas properties such as gas gain and transverse diffusion constant as well as the observed spatial resolution are presented.

Original languageEnglish
Pages (from-to)37-47
Number of pages11
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1
Publication statusPublished - 2011 Jun 11


  • Diffusion
  • GEM
  • ILC
  • Spatial resolution
  • TPC

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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