TUC3C —  Contributed Presentations WG C   (10-Oct-23   14:20—16:45)
Paper Title Page
TUC3C1
 Muon Production Target at J-PARC  
 
  • M.S. Matoba
    KEK, Tokai, Ibaraki, Japan
  
  The Muon Science Facility (MUSE) at the Japan Proton Accelerator Research Complex (J-PARC MLF) generates intense pulsed muon beams (3 GeV, 25 Hz, up to 0.33 mA), which are used to study various elementary particle and material life. A muon production target is installed on the proton beamline between the 3 GeV synchrotron and the neutron target. The target is made of high-purity isotropic graphite IG-430U (Toyo Tanso), which is exposed to a strong radiation environment and heats up to high temperatures during beam irradiation. In 2014, the fixed target was replaced by a rotating target, which is now operating smoothly at 800 kW. The ring-shaped graphite, 250 mm in inner diameter, 350 mm in outer diameter, and 20 mm thick, is divided into three sections to prevent failure due to thermal stress caused by thermal imbalance. By introducing a solid lubricant made from tungsten disulfide, we have achieved a long life of the rotating support under high heat, high radiation, and vacuum, which is expected to be about ten years. In the presentation, the current status of the target development and monitoring system will be reported.  
slides icon Slides TUC3C1 [2.721 MB]  
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TUC3C2
 Challenging of Muon Acceleration for Muon Colliders  
 
  • K. Yonehara
    Fermilab, Batavia, Illinois, USA
  
  The US HEP community presents a high interest on multi-TeV muon colliders in the last P5 meetings which will perform as a Higgs factory to characterize a Higgs boson in high precision. Besides, it will be a discovery machine to reveal various mysteries in high energy particle physics and cosmology. Because muons are tertiary particles and are decayed with a finite lifetime, a novel muon acceleration technology is required. In this presentation, I will show the identified challenge in the muon acceleration and demonstrate the new technology what we have researched and developed, and discuss a strategic plan and milestone for the future R&D.  
slides icon Slides TUC3C2 [1.925 MB]  
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