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| URL | https://doi.org/10.18429/JACoW-IPAC2025-WEPS031 |
|---|---|
| Title | Longitudinal beam coupling impedance of unshielded pumping manifolds at the CERN PS |
| Authors |
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| Abstract | The High-Luminosity LHC (HL-LHC) project aims at increasing beam intensity, hence posing tight constraints on its injector chain. A critical issue in the Proton Synchrotron (PS) is the contribution of numerous pumping manifolds to the longitudinal beam coupling impedance at high frequencies. It causes microwave instabilities that particularly affect ion beams and limit the longitudinal density of proton bunches close to transition energy. This contribution characterizes the impedance of these vacuum components through detailed electromagnetic simulations, examining configurations with and without a pick-up head inserted in the manifold. The effect of damping resistors on the impedance behavior is also investigated. Mitigation strategies, including shielding to prevent beam coupling with the manifold's volume, are evaluated for their effectiveness using electromagnetic simulations, offering solutions for improved beam performance. |
| Paper | download: WEPS031.pdf |
| Cite | BibTeX, LaTeX, Text/Word, RIS, EndNote |
| Conference | 16th International Particle Accelerator Conference |
| Series | |
| Location | Taipei, Taiwan |
| Date | 01-06 Jun 2025 |
| Publisher | JACoW Publishing, Geneva, Switzerland |
| Editorial Board | * Ming-Chyuan Lin - National Synchrotron Radiation Research Center * Yoichi Sato - KEK * Jui-Che Huang - National Synchrotron Radiation Research Center * David Button - Australian Nuclear Science and Technology Organisation * Ping-Shun Chuang - National Synchrotron Radiation Research Center |
| Online ISBN | 978-3-95450-248-6 |
| Online ISSN | 2673-5490 |
| Received | 28 May 2025 |
| Revised | 03 June 2025 |
| Accepted | 03 June 2025 |
| Issued | 05 November 2025 |
| DOI | 10.18429/JACoW-IPAC2025-WEPS031 |
| Pages | 2310-2313 |
| Copyright | Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |