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| WEA2I2 |
Space Charge Induced Resonances and Suppression in J-PARC MR |
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- T. Yasui
KEK, Tokai, Ibaraki, Japan
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In the main ring synchrotron (MR) of Japan Proton Accelerator Research Complex (J-PARC), space charge induced resonances are the cause of beam losses. Although we have scanned the tunes to minimize beam losses, it has been difficult to completely avoid high order structure resonances because the MR has only three super-periodicities. In the present settings for the neutrino operation, we identified that the space charge induced resonance 8ny=171 is the main source of beam losses, except for random resonances. We found that this resonance can be suppressed by beam optics modification while maintaining the tune. In this talk, we present the theoretical, simulation, and experimental results showing the advantages of the new beam optics and the reasons for them.
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Slides WEA2I2 [6.189 MB]
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-HB2023-WEA2I2
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| About • |
Received ※ 07 November 2023 — Accepted ※ 18 November 2023 — Issued ※ 29 November 2023 |
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