Development of the proton beam monitor based on the thin diamond crystal for the COMET Experiment

Fujii, Y.; Nishiguchi, H.; Mihara, S.; Hashimoto, Y.

doi:10.1016/j.nima.2018.10.136

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…During physics data taking periods, online monitor devices installed in the proton beam line will measure the spill-by-spill extinction. In order to withstand the huge amount of radiation dose, e.g., O(10 19 ) total protons or higher, we have been developing widegap semiconductor detectors, such as chemical-vapor-deposition diamond [30], silicon carbide, etc.…”

Section: Accelerator and Proton Beammentioning

confidence: 99%

Search for Muon-to-Electron Conversion with the COMET Experiment

Moritsu¹

2022

Universe

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Charged Lepton Flavor Violation is expected to be one of the most powerful tools to reveal physics beyond the Standard Model. The COMET experiment aims to search for the neutrinoless coherent transition of a muon into an electron in the field of a nucleus. Muon-to-electron conversion has never been observed, and can be, and would be, clear evidence of new physics if discovered. The experimental sensitivity of this process, defined as the ratio of the muon-to-electron conversion rate to the total muon capture rate, is expected to be significantly improved by a factor of 100 to 10,000 in the coming decade. The COMET experiment will take place at J-PARC with single event sensitivities of the orders of 10−15 and 10−17 in Phase-I and Phase-II, respectively. The ambitious goal of the COMET experiment is achieved by realizing a high-quality pulsed beam and an unprecedentedly powerful muon source together with an excellent detector apparatus that can tolerate a severe radiation environment. The construction of a new beam line, superconducting magnets, detectors and electronics is in progress towards the forthcoming Phase-I experiment. We present the experimental methods, sensitivity and backgrounds along with recent status and prospects.

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Section: Accelerator and Proton Beammentioning

confidence: 99%

Search for Muon-to-Electron Conversion with the COMET Experiment

Moritsu¹

2022

Universe

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“…The extinction monitor will be installed into the proton beam-line to directly detect such leakage protons. As this detector has to be tolerant to the high radiation caused by O(10 12 ) Hz of protons together with the fast time response, the baseline detector choice is a diamond semiconductor [9]. In addition, there are other candidates such as GaN (Gallium Nitride) being tested as well.…”

Section: Extinction Monitormentioning

confidence: 99%

COMET Detectors to Search for a Muon to Electron Conversion

Fujii

2021

Proceedings of the 3rd J-Parc Symposium (J-Parc2019)

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The COMET experiment at J-PARC aims to search for the neutrino-less muon to electron conversion in muonic atoms (µ − N → e − N). In the Standard Model of particle physics, a conversion rate of µ − N → e − N is negligibly small while many new physics models beyond the Standard Model imply it to be detectable. Therefore the µ − N → e − N conversion is highly sensitive to the new physics. The goal sensitivities of COMET are 3 × 10 −15 and 3 × 10 −17 in two different stages. To achieve these goals, the performance of each detector is essential to suppress the backgrounds. This paper describes the details of each detector component where we adopted novel detection techniques to fulfil the aims of COMET.

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Development of the proton beam monitor based on the thin diamond crystal for the COMET Experiment

Cited by 2 publications

References 3 publications

Search for Muon-to-Electron Conversion with the COMET Experiment

Search for Muon-to-Electron Conversion with the COMET Experiment

COMET Detectors to Search for a Muon to Electron Conversion

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