| Title |
Direct Sampling Digital Low-Level RF Control for CIAE BNCT Cyclotron |
| Authors |
- X. Mu, J.Y. Wei, Z.G. Yin
CIAE, Beijing, People’s Republic of China
- X.L. Fu
TRIUMF, Vancouver, Canada
|
| Abstract |
Boron Neutron Capture Therapy "BNCT" can be delivered using a high current cyclotron, resulting more compact and environmentally friendly design, yet the difficulties remain in the cyclotron part, particularly in RF systems. The high beam loading challenges the stability of the amplifiers, as well as the control loops. Especially in our case, the wall loss of each cavity is more than the beam-loading power of the CIAE BNCT cyclotron. To address the heavy beam loading coefficient, a higher-performance ADRC control algorithm is evaluated, together with the regular PID control. In the meantime, a direct sampling/synthesizing digital low-level RF control hardware design is put forward to have more flexibility in control implementation. Since this new design adopts Xilinx SOC as the main controller, it is convenient to combine real-time control algorithm with high-level control through Advanced Extensible Interface. In this LLRF design, the amplitude and phase control using PID control is implemented in the PS end, and the tuning control is taking advantage of the ADRC algorithm in the PL end. Using a symmetrical design, together with the buncher control, in total, regulation of three loops are achieved using two control boards. The software/hardware design as well as the commission result will be reported in this paper.
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| Paper |
download THPO007.PDF [0.643 MB / 3 pages] |
| Poster |
download THPO007_POSTER.PDF [2.567 MB] |
| Cite |
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※ EndNote |
| Conference |
CYCLOTRONS2022 |
| Series |
International Conference on Cyclotrons and their Applications (23rd) |
| Location |
Beijing, China |
| Date |
05-09 December 2022 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Tianjue Zhang (CIAE, Beijing, China); Volker R.W. Schaa (GSI, Darmstadt, Germany); Shizhong An (CIAE, Beijing, China); Daniela Kiselev (PSI, Villigen, Switzerland); Yuntao Liu (CIAE, Beijing, China); Pengzhan Li (CIAE, Beijing, China) |
| Online ISBN |
978-3-95450-212-7 |
| Online ISSN |
2673-5482 |
| Received |
29 December 2022 |
| Revised |
21 January 2023 |
| Accepted |
31 January 2023 |
| Issue Date |
01 April 2023 |
| DOI |
doi:10.18429/JACoW-CYCLOTRONS2022-THPO007 |
| Pages |
311-313 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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