Beam halo collimation in heavy ion synchrotrons

Strasik, I.; Prokhorov, I. K.

doi:10.1103/physrevstab.18.081001

Cited by 5 publications

(4 citation statements)

References 37 publications

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“…In addition, and for all ions, beam loss induced component damage and activation have to remain below their threshold values. Dedicated collimation systems for stripping and space charge induced 'halo' losses are foreseen in SIS100 [5]. Overall, space charge induced loss should remain below a few percent to allow for additional loss mechanisms due to stripping or at transition energy, for example.…”

Section: Jinst 15 P07020mentioning

confidence: 99%

Beam quality and beam loss predictions with space charge for SIS100

et al. 2020

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The SIS100 synchrotron as a part of the new FAIR accelerator facility at GSI should be operated at the "space charge limit" for light and heavy-ion beams. Losses due to space charge induced resonance crossing should not exceed a few percent during a full cycle. Detailed magnet field measurements are now available for 72 out of the total 108 main SIS100 dipole magnets. Particle tracking studies including nonlinear field errors up to 7 th order in the main magnets together with different space charge models are performed. Because of the long time scales reduced space charge models are employed for tune scans. First comparisons with simulations using a self-consistent space charge solver are discussed as well as potential measures to further improve the options in tune space for the reference intensities and beyond. K: Accelerator modelling and simulations (multi-particle dynamics; single-particle dynamics); Beam dynamics; Beam Optics 1Corresponding author.

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Section: Jinst 15 P07020mentioning

confidence: 99%

Beam quality and beam loss predictions with space charge for SIS100

et al. 2020

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“…[36] In our previous studies, a scaling law was established to expand the existing proton beam-loss tolerance to heavy-ion beams using the FLUKA 2008 code. [37] Cross-checking of two Monte Carlo code versions was triggered by the release of the FLUKA 2011 with the new feature for nucleus-nucleus interactions calculated below 100 MeV/u. [38] A bulky target was chosen to represent compact structures such as magnet yokes or coils.…”

Section: Beam-loss Criteria For Heavy-ion Acceleratorsmentioning

confidence: 99%

“…The scaling law based on proton losses cannot be applied for heavy ion beams at energies below 150 MeV/u, because one of the main assumptions, namely the same population of produced nuclides, is not valid anymore below this energy. [37] For the same reason, the effective dose rate becomes the keystone instead of the induced activity (see Table 2).…”

Section: Beam-loss Criteria For Heavy-ion Acceleratorsmentioning

confidence: 99%

Accelerator‐driven high‐energy‐density physics: Status and chances

Ren

Mäurer

Katrík

et al. 2017

Contributions to Plasma Physics

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We review the development of high‐energy‐density physics (HEDP) driven by intense particle beams, and give an account of the current status and the anticipated developments in the near future. Since progress of this field is strongly coupled to the technical development of high‐current accelerators, we report on the recent results in specific areas of high‐current accelerators relevant to HEDP. These are related to dynamic vacuum problems and the activation of accelerator structural material by high‐current, high‐energy particle beams, and we give an example of dense plasma diagnostics with high‐energy protons. The reported results have been achieved at existing machines at the Gesellschaft für Schwerionenforschung (GSI‐Darmstadt), the Institute of Theoretical and Experimental Physics in Moscow (ITEP‐Moscow), and the Institute of Modern Physics (IMP‐Lanzhou), and they are relevant for facilities under construction such as the FAIR facility in Darmstadt and the High Intensity Accelerator Facility (HIAF) proposed in China.

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“…A beam loss budget of 5% for the injection plateau and intermediate charge state heavy-ions is considered as tolerable [1]. Dedicated collimation systems for absorbing 'halo' losses caused by stripping and space charge are foreseen in SIS100 [3].…”

Section: Introductionmentioning

confidence: 99%

Simulation Study of the Space Charge Limit in Heavy-ion Synchrotrons

Oeftiger¹,

Chetvertkova²,

Kornilov³

et al. 2021

Preprint

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The SIS100 synchrotron as a part of the new FAIR accelerator facility at GSI should be operated at the "space charge limit" for light and heavy ion beams. Beam losses due to space charge induced resonance crossing should not exceed a few percent during a full cycle. The recent advances in the performance of particle tracking tools with self-consistent solvers for the 3D space charge forces now allow us to reliably identify low-loss areas in tune space, considering the full 1 s (O(10 5 ) turns) accumulation plateau in SIS100. A realistic magnet error model, extracted from precise bench measurements of the SIS100 main dipole and quadrupole magnets, is included in the simulations. Previously such beam dynamics simulations required non-self-consistent space charge models. By comparing to the self-consistent simulations results we are now able to demonstrate that the predictions from such faster space charge models can be used to identify low-loss regions with sufficient accuracy.The findings are applied by identifying a low-loss working point region in SIS100 for the design FAIR beam parameters. The bunch intensity at the space charge limit is determined. Several counter-measures to space charge are proposed to enlarge the low-loss area and to further increase the space charge limit.

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Beam halo collimation in heavy ion synchrotrons

Cited by 5 publications

References 37 publications

Beam quality and beam loss predictions with space charge for SIS100

Beam quality and beam loss predictions with space charge for SIS100

Accelerator‐driven high‐energy‐density physics: Status and chances

Simulation Study of the Space Charge Limit in Heavy-ion Synchrotrons

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