High-frequency linear accelerators are very suitable for carbon ion therapy, thanks to the reduced operational costs and the high beam quality with respect to synchrotrons, which are presently the only available technology for this application. In the framework of the development of a new linac for carbon ion therapy, this article describes the design of a compact 750 MHz Radio Frequency Quadrupole (RFQ) with trapezoidal vanes. A new semi-analytic approach to design the trapezoidal-vane RFQ is introduced together with the relevant beam dynamics properties. The RFQ is split into two decoupled rf cavities, both of which make use of a novel dipole detuning technique by means of length adjustment. The splitting is described both from the rf and the beam dynamics point of view. The paper concludes with the rf design of the full structure, including maximum surface field and thermal studies.
@article{arxiv.2007.10739,
title = {750 MHz radio frequency quadrupole with trapezoidal vanes for carbon ion therapy},
author = {Vittorio Bencini and Hermann W. Pommerenke and Alexej Grudiev and Alessandra M. Lombardi},
journal= {arXiv preprint arXiv:2007.10739},
year = {2021}
}
Comments
Revised version published in Physical Review Accelerators and Beams on 31 December 2020