JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
@inproceedings{maradia:cyclotrons2022-frbi01,
author = {V. Maradia and A.L. Lomax and D. Meer and S. Psoroulas and J.M. Schippers and D.C. Weber},
title = {{Different Methods to Increase the Transmission in Cyclotron-Based Proton Therapy Facilities}},
% booktitle = {Proc. CYCLOTRONS'22},
booktitle = {Proc. 23rd Int. Conf. Cyclotrons Appl. (CYCLOTRONS'22)},
pages = {368--372},
paper = {FRBI01},
language = {english},
keywords = {emittance, optics, cyclotron, scattering, proton},
venue = {Beijing, China},
series = {International Conference on Cyclotrons and their Applications},
number = {23},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2023},
issn = {2673-5482},
isbn = {978-3-95450-212-7},
doi = {10.18429/JACoW-CYCLOTRONS2022-FRBI01},
url = {https://jacow.org/cyclotrons2022/papers/frbi01.pdf},
abstract = {{In proton therapy (PT), high dose rates could allow efficient utilization of motion mitigation techniques for moving targets, and potentially enhance normal tissue sparing due to the FLASH effect. Cyclotrons are currently the most common accelerator for PT, accounting for two-thirds of the total installations. However, for cyclotron-based facilities, high dose rates are difficult to reach for low-energy beams, which are generated by passing a high-energy beam through an energy degrader and an energy selection system (ESS); due to scattering and range straggling in the degrader, the emittance and energy/momentum spread increase significantly, incurring large losses from the cyclotron to the patient position. To solve these problems, we propose two approaches: a) transporting the maximum acceptable emittance in both transverse planes (using asymmetric collimators and/or scattering foil); b) an ESS with a wedge (instead of slits), reducing the momentum spread of the beam without significant beam losses. We demonstrate in simulation that low-energy beam transmission can be increased up to a factor of 60 using these approaches compared to the currently used beamline and ESS. This concept is key to enhance the potential of proton therapy by increasing the possibilities to treat new indications in current and future proton therapy facilities while reducing the cost.}},
}