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MOPR015 |
Beta-beating Estimates and Corrections at SIS100 |
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- V. Chetvertkova, O. Boine-Frankenheim, Y. El Hayek, G. Franchetti, D. Ondreka, R. Singh, K. Sugita
GSI, Darmstadt, Germany
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Linear magnet errors cause modifications of accelerator optics. This effect is unwanted and requires proper correction. By using Mad-X we estimate the beta-beating for SIS100, taking into account also the misalignment of the sextupole magnets. The influence of the quadrupole errors on the beta function is discussed and the correction strategy is presented. In view of assessing the effect of space charge we present the dependence of beta-beating on the working point, and discuss the consequences for the correction strategy.
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| WEPM8X01 |
Collimation Design and Beam Loss Detection at FRIB |
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- Z. Liu, S. Cogan, M. Ikegami, S.M. Lidia, F. Marti
FRIB, East Lansing, Michigan, USA
- V. Chetvertkova
GSI, Darmstadt, Germany
- T. Maruta
KEK/JAEA, Ibaraki-Ken, Japan
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Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661.
As a multi-charge-state, heavy-ion, superconducting accelerator with a folded geometry, FRIB faces unique beam loss detection and collimation challenges to protect superconducting cavities from beam-induced damage. Collimation is especially important in the Folding Segment 1 where the multiple charge states are created by a charge stripper and selected by a charge selector. The transported ECR contaminants, interaction with the residual gas, and beam halo due to stripping could induced significant beam losses in this region. We have simulated the potential beam losses and planned collimation accordingly. A layered loss detection network is also specifically designed to visualize potential blind zones and to meet the stringent requirements on loss detection. The related sub-systems are designed and procured and are introduced in this paper.
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Slides WEPM8X01 [1.667 MB]
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