Cosmic ray tests of a GEM-based TPC prototype operated in Ar-CF4-isobutane gas mixtures: II

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

5 Citations (Scopus)


The spatial resolution along the pad-row direction was measured with a GEM-based TPC prototype for the future linear collider experiment in order to understand its performance for tracks with finite projected angles with respect to the pad-row normal. The degradation of the resolution due to the angular pad effect was confirmed to be consistent with the prediction of a simple calculation taking into account the cluster-size distribution and the avalanche fluctuation.

Original languageEnglish
Pages (from-to)439-444
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - 2014 Dec 11


  • Angular pad effect
  • CF
  • GEM
  • ILC
  • Spatial resolution
  • TPC

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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