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Sensitivity Analysis of Feedforward Beam Current Compensation for Improved Beam Loading Robustness

Stoica, D. Mihailescu ; Domont-Yankulova, D. ; Klingbeil, Harald ; Lens, D. (2020)
Sensitivity Analysis of Feedforward Beam Current Compensation for Improved Beam Loading Robustness.
10th International Particle Accelerator Conference. Melbourne, Australien (19.-24.05.2019)
doi: 10.25534/tuprints-00014534
Conference or Workshop Item, Secondary publication, Publisher's Version

Abstract

The planned SIS100 heavy ion synchrotron at the Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany will possess twenty ferrite accelerating cavities in its final stage of extension. During the intended acceleration cycles, the cavities will encounter significant beam loading effects, which have to be handled by the control systems. As both the generator- and beam-current act on the same system input, a feedforward disturbance compensation can be a promising approach to improve beam qualities and suppress instabilities induced by the beam current. Particle tracking simulations, incorporating twenty ferrite cavities and their attached LLRF control systems, are performed to analyse the sensitivity of the beam quality with respect to errors in the feedforward beam current compensation. The main focus lies on the time after injection from a pre-accelerator, where most cavities in the SIS100 do not provide any gap voltage and thus are particularly sensitive to induced voltages by beam currents if the cavities are not or only partly short-circuited.

Item Type: Conference or Workshop Item
Erschienen: 2020
Creators: Stoica, D. Mihailescu ; Domont-Yankulova, D. ; Klingbeil, Harald ; Lens, D.
Type of entry: Secondary publication
Title: Sensitivity Analysis of Feedforward Beam Current Compensation for Improved Beam Loading Robustness
Language: English
Date: 2020
Place of Publication: Darmstadt
Year of primary publication: 2019
Place of primary publication: Geneva
Publisher: JACoW Publishing
Issue Number: 10
Book Title: 10th International Particle Accelerator Conference
Series: Journal of physics. Conference Series
Series Volume: 1350
Event Title: 10th International Particle Accelerator Conference
Event Location: Melbourne, Australien
Event Dates: 19.-24.05.2019
DOI: 10.25534/tuprints-00014534
URL / URN: https://tuprints.ulb.tu-darmstadt.de/14534
Corresponding Links:
Origin: Secondary publication service
Abstract:

The planned SIS100 heavy ion synchrotron at the Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany will possess twenty ferrite accelerating cavities in its final stage of extension. During the intended acceleration cycles, the cavities will encounter significant beam loading effects, which have to be handled by the control systems. As both the generator- and beam-current act on the same system input, a feedforward disturbance compensation can be a promising approach to improve beam qualities and suppress instabilities induced by the beam current. Particle tracking simulations, incorporating twenty ferrite cavities and their attached LLRF control systems, are performed to analyse the sensitivity of the beam quality with respect to errors in the feedforward beam current compensation. The main focus lies on the time after injection from a pre-accelerator, where most cavities in the SIS100 do not provide any gap voltage and thus are particularly sensitive to induced voltages by beam currents if the cavities are not or only partly short-circuited.

Uncontrolled Keywords: cavity, emittance, controls, injection, simulation
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-145344
Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institut für Automatisierungstechnik und Mechatronik
18 Department of Electrical Engineering and Information Technology > Institut für Automatisierungstechnik und Mechatronik > Control Methods and Robotics (from 01.08.2022 renamed Control Methods and Intelligent Systems)
18 Department of Electrical Engineering and Information Technology > Institute for Accelerator Science and Electromagnetic Fields > Accelerator Technology
18 Department of Electrical Engineering and Information Technology > Institute for Accelerator Science and Electromagnetic Fields
Date Deposited: 30 Nov 2020 13:26
Last Modified: 20 Oct 2023 11:02
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