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| WEBZ02 |
BEAM TRACKING FOR J-PARC 3 GEV RCS INJECTION
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253 |
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- M. J. Shirakata, H. Fujimori
KEK, Ibaraki
- Y. Irie, T. Takayanagi
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
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In the J-PARC 3 GeV RCS injection system, the orbit-bump magnets of large-bore are located close with each other, and the incoming beam passes through the non-linear field region of the ring quadrupole magnet. Beam behavior under these conditions is analysed by means of the Runge-Kutta method in the three dimensional magnetic field distribution. The charge exchange foil is inserted between the bump magnets. Orbit of the stripped electrons from the foil is also investigated.
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| TUAZ06 |
Development of hybrid typoe carbon stripper foils with high durability against 1800K for RCS of J-PARC
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122 |
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- I. Sugai, Y. Arakida, Z. Igarashi, K. I. Ikegami, Y. Irie, H. Kawakami, M. Oyaizu, A. Takagi, Y. Takeda
KEK, Ibaraki
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We have successfully made long-lived and hybrid , thick, boron mixed carbon stripper foils for high energy and high intensity accelerators. The foils were made by the controlled DC arc-discharge method, and the thickness is wide range from 50 to 600 ug/cm2. The lifetime of the foils was tested with use of 3.2 MeV Ne+DC beams of 2.5 uA, in which a significant of energy was deposited in the foils and thus we could simulate the condition by high power accelerator. The lifetime in maximum was shown to be extremely long, 102 and 410 times longer those of diamond and commercially available best carbon foils, respectively.
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