MOPB008

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URL	https://doi.org/10.18429/JACoW-IPAC2025-MOPB008
Title	Higher order mode assessment in a single mode accelerating cavity
Authors	L. Kronshorst, H. De Gersem Technische Universität Darmstadt, Technical University of Darmstadt P. Hülsmann Deutsches Elektronen-Synchrotron, Deutsches Elektronen-Synchrotron DESY W. Müller Technische Universitaet Darmstadt, Technical University of Darmstadt
Abstract	With the upgrade from PETRA III to PETRA IV the requirements concerning the beam parameters increase. Thus, a special focus is placed on the suppression of higher order modes (HOMs) in the accelerating systems. An Investigation of the already presented single mode structure showed the emergence of certain higher order modes. These cavity eigenmodes are now examined by evaluating and assessing their degrading influence on the particle beam by calculating kick and loss factors. Subsequently, the cavity geometry is changed to attenuate the HOMs’ influences or even supress them entirely. In this paper the optimization process using numerical simulations together with the achieved results and cavity structure are presented.
Paper	download: MOPB008.pdf
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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	03 June 2025
Revised	03 June 2025
Accepted	03 June 2025
Issued	05 November 2025
DOI	10.18429/JACoW-IPAC2025-MOPB008
Pages	91-94
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.