TUPB105

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URL	https://doi.org/10.18429/JACoW-IPAC25-TUPB105
Title	A compact synchrotron for cancer therapy with helium ions
Authors	E. Benedetto Tera-Care Foundation A. Kolehmainen, D. Flier, F. Asvesta, G. Tranquille, J. Borburgh, L. Bottura, M. Angoletta, M. Vretenar, P. Panttaja European Organization for Nuclear Research A. Cassar Tera-Care Foundation; European Organization for Nuclear Research; University of Malta, Tera-Care Foundation, University of Malta, European Organization for Nuclear Research H. Huttunen University of Helsinki, European Organization for Nuclear Research K. Palskis Riga Technical University L. Garolfi Tera-Care Foundation, European Organization for Nuclear Research M. Sapinski Paul Scherrer Institute P. Gruebling The South East European International Institute for Sustainable Technologies R. Taylor European Organization for Nuclear Research, Imperial College London S. Van der Schueren Sapienza University of Rome, European Organization for Nuclear Research V. Korchevnyuk European Organization for Nuclear Research, École Polytechnique Fédérale de Lausanne V. Sansipersico Riga Technical University, European Organization for Nuclear Research
Abstract	In the frame of the Next Ion Medical Machine Study (NIMMS) collaboration based at CERN, a compact synchrotron for radiotherapy with high-intensity helium beams is designed. Interest in helium ions is growing in the major treatment centers, since they provide superior accuracy compared to protons, thanks to their sharper lateral penumbra, and higher linear energy transfer. Their properties lie in-between protons and carbon ions, without the fragmentation problems of the latter. Moreover, their lower magnetic rigidity allows helium-ion accelerators to be more compact than the large carbon-ion machines. The synchrotron design presented in this paper is based on normal-conducting dipole magnets at 1.65 Tesla and has a circumference of 35 meters. Optimized for helium ions, it can also accelerate protons, for treatment and particle radiography, and other species to smaller penetration depths. The design choices for the different systems are described taking into consideration the mechanical integration in a compact layout and operational flexibility. The technology readiness level is evaluated and R&D options to achieve higher performances and reduce energy consumption are identified.
Paper	download: TUPB105.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	28 May 2025
Revised	02 June 2025
Accepted	05 June 2025
Issued	06 June 2025
DOI	10.18429/JACoW-IPAC25-TUPB105
Pages	1136-1139
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.