Reichardt, Benjamin ; Lens, Dieter ; Klingbeil, Harald ; Domont-Yankulova, Dilyana (2018)
Tuning of 3-Tap Bandpass Filter during Acceleration for Longitudinal Beam-Stabilization at FAIR.
9. International Particle Accelerator Conference (IPAC2018). Vancouver, Canada (29.04.2018-04.05.2018)
doi: 10.1088/1742-6596/1067/7/072026
Conference or Workshop Item, Bibliographie
This is the latest version of this item.
Abstract
During acceleration in the heavy-ion synchrotrons SIS18/SIS100 at GSI/FAIR longitudinal beam oscillations are expected to occur. To reduce longitudinal emittance blowup, dedicated LLRF beam feedback systems are planned. To date, damping of longitudinal beam oscillations has been demonstrated in SIS18 machine experiments with a 3-tap filter controller (e.g. [1]), which is robust in regard to control parameters and also to noise. On acceleration ramps the control parameters have to be adjusted to the varying synchrotron frequency. Previous results from beam experiments at GSI indicate that a proportional tuning rule for one parameter and an inversely proportional tuning rule for a second parameter is feasible, but the obtained damping rate may not be optimal for all synchrotron frequencies during the ramp. In this work, macro-particle simulations are performed to evaluate, whether it is sufficient to adjust the control parameters proportionally (inversely proportionally) to the change in the linear synchrotron frequency, or if it is necessary to take more parameters, such as bunch-length and synchronous phase, into account to achieve stability and a considerable high damping rate for excited longitudinal dipole beam oscillations. This is done for single- and dual-harmonic acceleration ramps.
| Item Type: | Conference or Workshop Item |
|---|---|
| Erschienen: | 2018 |
| Creators: | Reichardt, Benjamin ; Lens, Dieter ; Klingbeil, Harald ; Domont-Yankulova, Dilyana |
| Type of entry: | Bibliographie |
| Title: | Tuning of 3-Tap Bandpass Filter during Acceleration for Longitudinal Beam-Stabilization at FAIR |
| Language: | English |
| Date: | 24 August 2018 |
| Place of Publication: | Bristol |
| Publisher: | IOP Publishing |
| Journal or Publication Title: | Proc. of the 9th International Particle Accelerator Conference (IPAC'18), 29.04.-04.05.2018, Vancouver, Canada |
| Event Title: | 9. International Particle Accelerator Conference (IPAC2018) |
| Event Location: | Vancouver, Canada |
| Event Dates: | 29.04.2018-04.05.2018 |
| DOI: | 10.1088/1742-6596/1067/7/072026 |
| Corresponding Links: | |
| Abstract: | During acceleration in the heavy-ion synchrotrons SIS18/SIS100 at GSI/FAIR longitudinal beam oscillations are expected to occur. To reduce longitudinal emittance blowup, dedicated LLRF beam feedback systems are planned. To date, damping of longitudinal beam oscillations has been demonstrated in SIS18 machine experiments with a 3-tap filter controller (e.g. [1]), which is robust in regard to control parameters and also to noise. On acceleration ramps the control parameters have to be adjusted to the varying synchrotron frequency. Previous results from beam experiments at GSI indicate that a proportional tuning rule for one parameter and an inversely proportional tuning rule for a second parameter is feasible, but the obtained damping rate may not be optimal for all synchrotron frequencies during the ramp. In this work, macro-particle simulations are performed to evaluate, whether it is sufficient to adjust the control parameters proportionally (inversely proportionally) to the change in the linear synchrotron frequency, or if it is necessary to take more parameters, such as bunch-length and synchronous phase, into account to achieve stability and a considerable high damping rate for excited longitudinal dipole beam oscillations. This is done for single- and dual-harmonic acceleration ramps. |
| 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 of Electromagnetic Field Theory (from 01.01.2019 renamed Institute for Accelerator Science and Electromagnetic Fields) 18 Department of Electrical Engineering and Information Technology > Institute of Electromagnetic Field Theory (from 01.01.2019 renamed Institute for Accelerator Science and Electromagnetic Fields) > Accelerator Technology (until 31.12.2018) |
| Date Deposited: | 24 Aug 2018 09:04 |
| Last Modified: | 26 Jul 2024 08:09 |
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Available Versions of this Item
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Tuning of 3-tap Bandpass Filter During Acceleration for Longitudinal Beam Stabilization at FAIR. (deposited 02 Jul 2021 12:22)
- Tuning of 3-Tap Bandpass Filter during Acceleration for Longitudinal Beam-Stabilization at FAIR. (deposited 24 Aug 2018 09:04) [Currently Displayed]
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