Paper |
Title |
Page |
MPPE044 |
Damping Wiggler Study at KEK-ATF
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2809 |
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- T. Naito, H. Hayano, Y. Honda, K. Kubo, M. Kuriki, S. Kuroda, T. Muto, N. Terunuma, J.U. Urakawa
KEK, Ibaraki
- M. Korostelev, F. Zimmermann
CERN, Geneva
- N. Nakamura, H. Sakai
ISSP/SRL, Chiba
- M.C. Ross
SLAC, Menlo Park, California
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The effects by damping wiggler magnets have been studied at KEK-ATF. The damping ring of the KEK-ATF is a 1.3 GeV storage ring capable of producing ultra-low emittance electron beams. It is significant issue to realize fast damping in the damping ring. The tuning method with 4 sets of wiggler was investigated for the ultra-low emittance beam. The performance on the beam quality, which is related to the transverse (x and y) and the longitudinal (z and dp/p), has been measured by the SR monitor, the laser wire, the streak camera and the energy spread monitor at the extraction line. We report on the operation condition and the measurement results.
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RPPP007 |
CLIC Damping Ring Optics Design Studies
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1060 |
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- M. Korostelev, F. Zimmermann
CERN, Geneva
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In this paper the nonlinearities induced by the short period NbFeB permanent wiggler optimized for the CLIC damping ring and their influence to the beam dynamics are studied.
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RPPP008 |
The Short Circumference Damping Ring Design for the ILC
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1126 |
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- M. Korostelev, F. Zimmermann
CERN, Geneva
- K. Kubo, M. Kuriki, S. Kuroda, T. Naito, J.U. Urakawa
KEK, Ibaraki
- M.C. Ross
SLAC, Menlo Park, California
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The ILC damping ring tentative design is driven by the operational scenario of the main linac, the beam-dynamics demand of producing a stable and high-quality beam, the injection/extraction scheme and the kicker performance. In this paper, a short circumference damping ring design based on TME cells is described. The ring accommodates injection kickers which provide a flat top of 280 nsec and a 60 nsec rise and fall time and very fast strip-line kickers for beam extraction with a 2 nsec rise and fall time for 3-MHz operation. The potential impact of collective effects and the possible degradation of the dynamic aperture by nonlinear-wiggler fields are estimated.
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RPPP012 |
Collective Effects in the CLIC Damping Rings
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1312 |
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- F. Zimmermann, M. Korostelev, D. Schulte
CERN, Geneva
- T.A. Agoh, K. Yokoya
KEK, Ibaraki
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The small emittance, short bunch length, and high current in the CLIC damping ring could give rise to collective effects which degrade the quality of the extracted beam. In this paper, we survey a number of possible instabilities and estimate their impact on the ring performance. The effects considered include fast beam-ion instability, coherent synchrotron radiation, and electron cloud, in addition to conventional single and multi-bunch instabilities.
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