Choose timezone
Your profile timezone:
CAS Accelerator Seminars
Muon Production Target at J-PARC / MUSE
by
→
Europe/Zurich
WBGB/019 (PSI)
WBGB/019
PSI
Description
The most intense pulsed muon beam in the world will be generated by a 3-GeV 333-µA proton beam on a muon target made of 20-mm thick isotropic graphite at J-PARC/MUSE (Japan Proton Accelerator Research Complex /Muon Science Establishment). The first muon beam was successfully produced on September 26th, 2008, and the most intense pulsed muon beam has continuously been produced on the fixed muon target (Fig. 1) with a 300-kW proton beam since January 2012. However, graphite materials are known to lose their crystal structure and can be shrunk by the intense proton beam irradiation. Consequently, the lifetime of the muon target is essentially determined by the radiation damage in graphite, and is evaluated to be half a year. Hence, we are planning to distribute the radiation damage by rotating a graphite wheel (Fig. 2), learning from Paul Scherrer Institut. Simultaneously, we began to measure the 3-GeV proton irradiation effect to the thermal conductivities of the isotropic graphite, IG-430 through the new laser-spot-heating technique. The distribution of the thermal conductivities for the used radioactive muon target could be successfully measured non-destructively and without any contact in September 2011. In this seminar, the present status of the Muon Production Target at J-PARC/MUSE, especially the development of a rotation target and PIE (Post irradiation Experiments) tests to measure the thermal conductivities, will be described.
Contact Daniela Kiselev, tel. 3037
