JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
MOA2I1
KEK, Tokai, Ibaraki, Japan
| Paper | Title | Page |
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| TUA4I2 | 1-MW Beam Operation at J-PARC RCS with Minimum Beam Loss | 147 |
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| The 3-GeV RCS of J-PARC now operates at high-intensity to nearly the designed 1 MW beam. The beam loss and the corresponding residual radiation is one of the key limitations against beam intensity ramp up. Recently, by a series of beam studies and feedback from numerical simulations, we have well mitigated the beam loss to a minimum level and also reduced the beam emittances for beam operation to the spallation neutron source as well as to the main ring. The residual beam loss at the designed 1 MW beam power occurs mostly due to the unavoidable foil scattering beam loss during multi-turn injection, while other beam loss sources have been well mitigated to realize a stable and higher availability beam operation at a nearly 1 MW beam power. | ||
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Slides TUA4I2 [2.303 MB] | |
| DOI • | reference for this paper ※ doi:10.18429/JACoW-HB2023-TUA4I2 | |
| About • | Received ※ 02 October 2023 — Revised ※ 07 October 2023 — Accepted ※ 11 October 2023 — Issued ※ 21 October 2023 | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
MOA2I1 |
Beam Commissioning of the J-PARC Mr After Its High-Repetition Rate Upgrade | |
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| At the J-PARC MR, a project to increase beam power with faster repetition rates is currently underway. With large-scale hardware upgrades in Jul. 2021 to Jun. 2022, the MR operation cycle for the fast extraction mode has been shortened from 2.48 s to 1.36 s, and beam commissioning at this operation cycle is in progress now. The MR first aims to achieve a beam power of >750 kW at this operation cycle, and then finally 1.3 MW by further shortening the operation cycle to 1.16 s and with a higher beam intensity of 3.3 x 1014 ppp. This paper describes the beam commissioning status including the future prospect. | ||
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Slides MOA2I1 [8.270 MB] | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |