| 摘要 |
PROBLEM TO BE SOLVED: To provide a charged particle beam acceleration method and apparatus used as part of multi-axis charged particle radiation therapy of cancerous tumors.SOLUTION: Protons delivered along the initial proton beam path are preliminarily accelerated in the circulating beam path with a pre-accelerator 240 and after acceleration are extracted via a deflector 292 to a beam transport path 268. A rounded corner polygon synchrotron 130 includes four straight sections 910 and four bending or turning sections 920, where each of the four turning sections 920 uses one or more magnets to turn the proton beam about ninety degrees. |
