The following email has been sent to SAKO, Hiroyuki:
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Dear Hiroyuki Sako,
The submission of your abstract has been successfully processed.
Abstract submitted: https://indico.cern.ch/userAbstracts.py?confId=192695.
Status of your abstract: https://indico.cern.ch/abstractDisplay.py?abstractId=22&confId=192695.
See below a detailed summary of your submitted abstract:
Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics
Submitted by: SAKO, Hiroyuki
Submitted on: 22 January 2014 10:43
Title: Development of a GEM-based TPC for H-dibaryon Search at J-PARC
Abstract content We have developed a TPC using GEMs and a gating grid to search for the H-dibaryon at J-PARC with high rate hadron beams up to 10^6 Hz /cm^2. The TPC consists of an octagonal-shape drift cage of 50 cm diameter and 55 cm height, filled with Ar-CH_4 (90:10) gas, and the end cap chamber consisting of a gating grid plane, 3-layer GEMs, and a pad plane. The TPC is operated in a dipole magnetic field of 1 T in parallel to the drift electric field. The horizontal position resolution is expected better than 300 um. We have build a small-scale prototype TPC and performed a beam test. The position shift due to positive-ion feedback was suppressed within ±0.2 mm both in transverse and longitudinal directions at the beam rate up to 5 × 105 cps/cm2. Detection efficiency of 97 % per pad row at a low rate (103 cps/cm2) beam, and 90 % at a high rate (106 cps/cm2) beam were achieved. We also performed a laser test of the prototype in magnetic field. We observed a reasonable improvement of the position resolution due to the magnetic field. We also show the status of the test of the end cap chamber of the full-size TPC.
Summary
Primary Authors: SAKO, Hiroyuki (Japan Atomic Research Agency) hiroyuki.sako@j-parc.jp
Co-authors: Prof. IMAI, Kenichi (Japan Atomic Energy Agency) kimai@post.j-parc.jp SATO, Susumu (jaea) susumu.sato@j-parc.jp HASEGAWA, Shoichi (J) hasegawa.shoichi@jaea.go.jp
Abstract presenters: SAKO, Hiroyuki
Track classification: Sensors: 1c) Gaseous Detectors
Presentation type: --not specified--
Comments: