High-rate performance of a time projection chamber for an H-dibaryon search experiment at J-PARC

S. H. Kim, Y. Ichikawa, H. Sako, J. K. Ahn, T. Akaishi, S. Ashikaga, S. W. Choi, H. Ekawa, S. Hasegawa, S. Hayakawa, W. S. Jung, B. M. Kang, J. Y. Lee, T. Nanamura, S. Sato, K. Shirotori, K. Suzuki, K. Tanida, S. B. Yang, J. Yoshida

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We have developed a gas electron multiplier (GEM)-based time projection chamber (TPC) for the H-dibaryon search experiment at J-PARC. High-rate K beam particles enter a TPC gas volume of approximately 0.2 m3, in a direction perpendicular to the electric field. A long-rectangular hollow section is located inside the TPC volume to accommodate a diamond target. We commissioned the TPC using 230-MeV protons with beam rates of up to 1 MHz. The TPC data acquisition system collected 5768 pad signals in full readout mode, with almost 100% efficiency, at a preset trigger rate of 230 Hz. We operated the TPC in an Ar/CH4 gas mixture (90/10) without a magnetic field. The spatial resolutions on the pad plane are measured to be 400–700μm, which correspond to 230–300μm in a magnetic field of 1 T. We confirmed high tracking capability at beam rates of up to 1 MHz.

Original languageEnglish
Pages (from-to)359-370
Number of pages12
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - 2019 Oct 1


  • Gas electron multiplier
  • J-PARC
  • Time projection chamber

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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