The COMET experiment aims to search for the neutrinoless conversion of a muon to an electron in a muonic atom. This experiment utilizes a bunched slow-extracted (bunched-SX) proton beam at 8 GeV from the J-PARC main ring synchrotron. To achieve a sensitivity of 10−17, the fraction of inter-bunch stray protons, called extinction, must be less than 10−10. The 8 GeV proton beam commissioning with a bunched-SX beam for the COMET experiment was performed in May 2021. The extinction was measured by counting all secondary pions in the K1.8BR secondary beamline in the J-PARC Hadron Experimental Facility. After the extinction studies tried out several setups, the most extinction achievable setup was performed with O(1010) statistics. This paper reports the extinction measurement and the current analysis status.
|Journal||Proceedings of Science|
|Publication status||Published - Mar 31 2022|
|Event||22nd International Workshop on Neutrinos from Accelerators, NuFact 2021 - Cagliari, Italy|
Duration: Sept 6 2021 → Sept 11 2021
All Science Journal Classification (ASJC) codes