Speaker
Description
Abstract Proton therapy has become an advanced radiotherapy technique for cancer treatment due to its precise dose distribution and minimal tissue side effect. Currently, most proton therapy centers utilize cyclotrons, which offer significant commercial and medical advantages, to provide high current proton beams. Based on the 230 MeV superconducting cyclotron CYCIAE-230 independently developed by the China Institute of Atomic Energy (CIAE), this paper introduces the design, implementation, and commissioning of the beam transport line for proton therapy. The beamline features two beamlines, leading to a 360° rotating gantry treatment room and a fixed beam terminal for proton therapy and proton irradiation, respectively. Building on the overall optical design, this paper primarily discusses the beam optics matching between the SC cyclotron and the beamline, an energy selection system with adjustable emittance and transmission efficiency using two steps of divergence selection slits, and a room-temperature achromatic rotating gantry beamline. The beamline commissioning has also been conducted, addressing the correction of beam extraction angles from the cyclotron, completing energy tests in water phantoms using a degrader, and achieving controlled field irradiation and dose rate at the isocenter. The design and commissioning results demonstrate that the beam transport line of the proton therapy system developed at CIAE can successfully fulfill its functions of dose depth modulation and beam transport adjustment, and so on.
| Email address | zhaobh18545880907@163.com |
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| Funding Agency | This work was supported in part by theNSFC under Grant 12427810 and 12135020 |
| Classification | Ion optics and spectrometers |
