Spatial resolutions of GEM TPC. A novel theoretical formula and its comparison to latest beam test data

R. Yonamine, K. Fujii, K. Ikematsu, A. Ishikawa, T. Fusayasu, P. Gros, Y. Kato, S. Kawada, M. Kobayashi, T. Matsuda, O. Nitoh, R. D. Settles, A. Sugiyama, T. Takahashi, J. Tian, T. Watanabe

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Unprecedented charged particle momentum resolution is required for precision Higgs studies at the International Linear Collider (ILC), which in turn demands as many as 200 sampling points with a high spatial resolution of 100 microns or better if we are to adopt a TPC for the central tracker. We discuss a novel theoretical resolution formula for a GEM-readout TPC, which is applicable to inclined tracks as opposed to the previous formula which is valid only for normal incidence. The formula identifies key factors that determine the spatial resolution and helps optimize the readout pad geometry and High Voltage settings for a given gas mixture. The formula is compared to the latest beam test results for a LC TPC Large prototype.

Original languageEnglish
Article numberC03002
JournalJournal of Instrumentation
Volume9
Issue number3
DOIs
Publication statusPublished - 2014 Mar

Keywords

  • Charge transport and multiplication in gas
  • Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc)
  • Gaseous detectors
  • Time projection Chambers (TPC)

ASJC Scopus subject areas

  • Mathematical Physics
  • Instrumentation

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