Speaker
Description
A cyclotron based proton therapy system developed by CIAE includes a superconducting cyclotron CYCIAE-230, a beam line with a fast energy selection system, a 360 ° gantry, and a pencil beam scanning nozzle. There is another beam line for proton irradiation, used for research of radiation effects in electronics and power devices. In the past two years, the performance of CYCIAE-230 has been significantly improved. We optimized the insulation structure of the cathode inside the micro-PIG source for high power operation; adjust the first gap in the central region; increase the duty cycle of the acceleration system from 35% to CW; fine tune the first harmonics and positions of HV electrostatic deflectors for beam extraction to increase the efficiency, improve the vacuum around the HV feeding to significantly reduce the multipactoring, and enhance the operational stability. The extracted beam intensity up to 1600 nA has been obtained, providing sufficient current for achieving ultra-high dose rate. Based on conservative estimates, the dose rate of CYCIAE-230 will be much higher than 3600Gy/s. And as published previously, it is 45 ms the time interval varying one energy step of the degrader and 51 units of the magnets, and it is better than 0.3mm the isocenter of 360° gantry. It is obvious that the potential frontier applications could be FLASH and Spot-Scanning Arc Therapy. The 5╳1011p/cm2/s high fluence rate, CW beam, wide energy range, high uniformity proton irradiation facility, based on CYCIAE-230 is also suitable for research on radiation and biological effects.
| Minioral | Yes |
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| IEEE Member | No |
| Are you a student? | Yes |