Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session EH: Instrumentation III
7:00 PM–9:30 PM,
Thursday, October 25, 2018
Hilton Room: Kona 2/3
Chair: Darek Seweryniak, Argonne National Laboratory
Abstract ID: BAPS.2018.HAW.EH.5
Abstract: EH.00005 : The Development of 2 m long multi-gap RPC for LEPS2 experiment
8:00 PM–8:15 PM
(Kyoto Sangyo Univ.)
(RCNP, Osaka Univ.)
(RCNP, Osaka Univ.)
We developed multi-gap RPCs with 2 m long strips for LEPS2 experiment. LEPS2 experiment at the SPring-8 in Japan aims to study hadron physics from photo-production reactions. The High rate, high energy and high polarization γ beam irradiates a target. We detect the produced particles by a solenoid spectrometer covering the polar angle region of 5-120 degrees. The 2m long RPCs will be installed into the solenoid magnet cylindrically, which are 0.9m away from the target. They are used as Time-of-Flight (TOF) counters for particle identification (π/K/p). These RPCs are required below 75 ps time resolution (σ) for 3 σ separation. In the previous work, we achieved around 50 ps resolution of 1 m long RPCs. We also developed 2 m RPCs having 65 ps resolution. But since oscillation of preamp often occurred, it was difficult to operate this 2 m chamber stably.
We improved the ground around the preamps and we succeeded the noise suppression. In added, we changed several points. We studied the performance of these chambers. We find that they have about 60 ps resolution and over 99% efficiency. In this presentation, I will talk about several improvement and the performance test.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.EH.5
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700