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An Experimental Plan for 400 MeV H− Stripping to Proton by Using Only Lasers in the J-PARC RCS |
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- P.K. Saha, H. Harada, S. Kato, M. Kinsho
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
- Y. Irie, I. Yamane
KEK, Ibaraki, Japan
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The 3-GeV RCS (Rapid Cycling Synchrotron) of J-PARC is gradually approaching to the design operation with 1 MW beam power. Studies are ongoing for further higher beam power of 1.5 MW. The injection and extraction energy of RCS is 0.4 and 3 GeV, respectively. Lifetime of the stripper foil is the highest concern beyond 1 MW beam power. We have also already started detail studies of H− stripping to protons by using lasers. However, in order to avoid high magnetic field required in the process of laser-assisted H− stripping to protons, especially for lower H− energies, we are studying the possibilities of using only laser system for 400 MeV H− beam in the RCS. The method is a three step process, similar to that of SNS but lasers are used instead of high field magnets in the 1st (H− to H0) and 3rd step (H0* to p). A Nd:YAG laser can be properly used for both 1st and 3rd steps, where commercially available powerful Excimer laser will be used an H0 excitation in the 2nd step. Although detail R&D studies are necessary to reach to the ultimate goal, we plan to carry out an experiment in 2017. A detail of the present method, experimental schedule and the expected outcome will be presented.
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Slides TUPM7X01 [3.321 MB]
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