Contribution to a conference proceedings

GSI-2025-00522

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Instability mitigation using octupoles in bunches with space-charge

Boine-Frankenheim, O. ; Kornilov, V. (Corresponding author)GSI*

2023
JACoW Publishing Geneva, Switzerland

Please use a persistent id in citations: doi:10.18429/JACOW-IPAC2023-WEPA015  doi:10.15120/GSI-2025-00522

Abstract: Octupole magnets are a central mitigation method against the transverse collective instabilities expected for the high-intensity operation of the SIS18 and SIS100 synchrotrons in the FAIR project. For these beam parameters, the self-field space-charge effect dominates the betatron footprint, and strongly modifies the instability drive and the Landau damping properties. The space-charge tune shifts are related to all three incoherent amplitudes, and is an intrinsic interaction. We consider all these effects and study Landau damping of head-tail modes due to the combination of octupoles and space-charge. Using the data from experimental instability observations, and particle tracking simulations, we provide estimations for the expected high-intensity operation of the SIS synchrotrons.

Keyword(s): Accelerator Physics ; mc5-beam-dynamics-and-em-fields - MC5: Beam Dynamics and EM Fields ; mc5-d06-coherent-and-incoherent-instabilities-measurements-and-countermeasures - MC5.D06: Coherent and Incoherent Instabilities Measurements and Countermeasures

Note: Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license.

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Contributing Institute(s):

1. Accelerator Physics (APH)

Research Program(s):

1. 899 - ohne Topic (POF4-899) (POF4-899)

Experiment(s):

1. no experiment theory work (theory)

Appears in the scientific report 2023

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Database coverage:
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