Comparison between large discharges of a gas counter in pure CH4 and in a CH4Ar mixture

A. Nohtomi, T. Matsumoto, K. Narita, Y. Uozumi, T. Sakae, M. Matoba, N. Koori, H. Ijiri

Research output: Contribution to journalLetterpeer-review


Gas discharge characteristics in pure CH4 have been studied in the high gas-multiplication region by using a gas counter with a thick anode wire (50 μm in diameter) and compared with those of the self-quenching streamer (SQS) mode in a CH4Ar mixture. The results of the first optical observation indicate that the large pulses observed in CH4, whose pulse amplitudes are comparable to those of the SQS mode, are not due to streamer discharges. Instead, a luminous region is observed near the anode wire (r ≤ 0.7 mm) where the electric field is higher than the threshold value for gas multiplication, 104 V/cm.

Original languageEnglish
Pages (from-to)582-584
Number of pages3
JournalNuclear Inst. and Methods in Physics Research, A
Issue number2-3
Publication statusPublished - Nov 11 1995

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation


Dive into the research topics of 'Comparison between large discharges of a gas counter in pure CH<sub>4</sub> and in a CH<sub>4</sub>Ar mixture'. Together they form a unique fingerprint.

Cite this