Beam power and residual dose history of J-PARC RCS

Yamamoto, Kazami; Hotchi, H.; Harada, Hiroyuki; Hayashi, Naoki; Kinsho, Michikazu; Saha, Pranab; Tamura, Fumihiko; Yamamoto, Masanobu; Yoshimoto, Masahiro; Nakane, Yoshibumi; Seki, Kazunari; Miyamoto, Yoshiaki

doi:10.15669/pnst.4.238

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Arc Loss Due To Unbalanced Collimator Setting1

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2014

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“…The loss near the dispersion maximum point increased immediately after initiating 100-kW operation [13,21]. This loss was due to the bad positioning of the primary collimator.…”

Section: Arc Loss Due To Unbalanced Collimator Settingmentioning

confidence: 99%

Performance of the beam collimation system in the J-PARC RCS

Yamamoto¹,

Kato

Harada³

et al. 2014

Progress in Nuclear Science and Technology

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The most important issue in a high intensity proton accelerator is to keep the accelerator tunnel in a hands-on-maintenance condition. A collimation system was designed and installed in 3GeV Rapid Cycling Synchrotron (RCS) at the Japan Proton Accelerator Research Complex (J-PARC) to be localized the beam loss point to a restricted area. The experimental results indicated that the RCS collimation system performs well enough such that nearly all the ring components are maintained in good condition. However, as the beam power increased, unexpected losses downstream of the injection foil increased. Therefore, an additional collimator was installed that successfully reduced such unexpected losses.

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“…The loss near the dispersion maximum point increased immediately after initiating 100-kW operation [13,21]. This loss was due to the bad positioning of the primary collimator.…”

Section: Arc Loss Due To Unbalanced Collimator Settingmentioning

confidence: 99%