MOPB016

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URL	https://doi.org/10.18429/JACoW-LINAC2024-MOPB016
Title	RF tuning analysis of a 750 MHz carbon RFQ for medical applications
Authors	G. Moreno, C. Oliver, D. Gavela, P. Calvo, M. Lopez, Á. Rodríguez Páramo, J. Etxebarria, J. Perez Morales Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas J. Giner Navarro Instituto Universitario de Ciencia de los Materiales A. Lombardi European Organization for Nuclear Research U. Etxebeste Rodríguez Egile Mechanics S.L. J. Carmona, M. Alvarado Martin Added Value Solutions
Abstract	This work is part of the development study of a linac injector for hadron therapy with carbon ion beams. The initial cavities of the future injector consist of two 750 MHz Radio Frequency Quadrupoles (RFQ), which are based on the compact CERN High-Frequency RFQ. These RFQs are designed to accelerate the ions from 15 KeV/u to 5 MeV/u. Each RFQ, with a length of more of 2 meters, comprises four individual modules and 32 tuners, 8 per module. Certain design choices, manufacturing imperfections, and misalignments lead to local variations in the frequency and field distribution within the RFQs. The tuning procedure corrects these perturbations in the TE210 operating mode using a bead pull system and movable tuners. The aim of this article is to determine the maximum field correction achieved through this tuning without affecting the beam dynamics. For this purpose, a set of electromagnetic deviations that introduces significant dipole components to the cavity is simulated, using CST Studio. Using the tuning algorithm, this EM deviation is corrected in a realistic way.
Paper	download: MOPB016.pdf
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Conference	32nd Linear Accelerator Conference (LINAC2024)
Series
Location	Chicago, IL, USA
Date	25-30 Aug 2024
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Kelly Jaje (ANL), Kip Bishofberger (LANL), Ryan Brody (ANL), Gustavo Bruno (ANL), Jan Chrin (PSI), Cathy Eyberger (ANL), Maggie Montes (SLAC), Denise Skiadopoulos (ANL), Ling Wang (MSU/FRIB), Kent Wootton (ANL)
Online ISBN	978-3-95450-219-6
Online ISSN	2226-0366
Received	20 August 2024
Revised	27 August 2024
Accepted	27 August 2024
Issued	23 October 2024
DOI	10.18429/JACoW-LINAC2024-MOPB016
Pages	67-70
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.