Purity measurement of liquid methane by using the drift property of ionized electrons

H. Tanaka, T. Ariyoshi, N. Mori, H. Arima, K. Maehata, K. Ishibashi, Y. Matsumoto

Research output: Contribution to journalArticlepeer-review


The purity is important parameter for the collection of electrons ionized in an ionization chamber filled with the liquid methane. The methane gas purification system was developed for the liquid methane ionization chamber. After the condensation of the purified methane gas in the ionization chamber mounted with 241 Am alpha source, ionized electrons were collected by a charge sensitive preamplifier. The concentration of impurity of oxygen gas was obtained by analyzing a collected charge distribution. Pulse height distributions of a charge sensitive preamplifier were obtained for the detection of y rays and neutrons emitted from 60Co, 137Cs and Am-Be sources located outside the cryostat of the liquid methane chamber.

Original languageEnglish
Pages (from-to)342-345
Number of pages4
Journaljournal of nuclear science and technology
Publication statusPublished - Mar 2004

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering


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