TUP18

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URL	https://doi.org/10.18429/JACoW-HIAT2025-TUP18
Title	Computational analysis of MP activation and suppression in 325 MHz FPC
Authors	H. Do Institute for Basic Science
Abstract	A 325 MHz RF Fundamental Power Coupler (FPC) designed to operate under 20 kW CW in the high energy SC Linac of the RAON. One of the most important consideration in the FPC EM design is to reduce and eliminate a multipacting (MP) activation in both TW mode and SW mode. Prior to the MP reduction design, the MP bands of the FPC was computed with CST Particle Studio. It was confirmed that third or higher order of MP bands were activated within the operating range on the surface condition of the coupler. Therefore, designs to suppress MP are needed. To eliminate MP, a DC voltage was applied to center conductor of the FPC. Detailed the simulation modeling and computational analysis results where MP was effectively suppressed for both modes are presented.
Paper	download: TUP18.pdf
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Conference	16th International Conference on Heavy Ion Accelerator Technology
Series
Location	East Lansing, MI, USA
Date	22-27 Jun 2025
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Ling Wang (FRIB/MSU), Kelly Jaje (ANL), Michelle Wier (FRIB/MSU), Kent Wootton (ANL), Tong Zhang (FRIB/MSU)
Online ISBN	978-3-95450-260-8
Online ISSN	2673-5547
Received	19 June 2025
Revised	23 June 2025
Accepted	23 June 2025
Issued	13 October 2025
DOI	10.18429/JACoW-HIAT2025-TUP18
Pages	167-170
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.