Performance and simulation of a double-gap resistive plate chamber in the avalanche mode

S. H. Ahn, B. Hong, S. J. Hong, M. Ito, T. I. Kang, B. I. Kim, J. H. Kim, H. W. Lee, K. B. Lee, K. S. Lee, J. K. Lim, D. H. Moon, S. Park, W. J. Park, M. S. Ryu, K. S. Sim, S. Y. Bahk, Y. J. Kim, Y. U. Kim, D. G. KooS. J. Lee, S. K. Nam, J. T. Rhee

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


We present a detailed analysis of the time and the charge signals of a prototype double-gap resistive plate chamber for the endcap region of the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC). The chamber was built with relatively low-resistivity bakelite. The time and the charge results demonstrate that the high-voltage plateau, which satisfies various CMS requirements for the efficiency, the noise cluster rate, the fraction of the large signal, and the streamer probability, can be extended at least up to 400 V with the present design. In addition, a simple avalanche multiplication model is studied in detail. The model can reproduce the experimental charge spectra reasonably well. The charge information enables us to estimate the effective Townsend coefficient in avalanche-mode operation.

Original languageEnglish
Pages (from-to)1490-1499
Number of pages10
JournalJournal of the Korean Physical Society
Issue number6
Publication statusPublished - 2004 Dec


  • CMS
  • Double-gap RFC
  • LHC
  • Simulation
  • Townsend coefficient

ASJC Scopus subject areas

  • General Physics and Astronomy


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