| 摘要 |
<p>A particle therapy system includes an ECR ion source for production of charged ions, which are accelerated in an accelerator unit that follows the ECR ion source. The accelerator unit accelerates the charged ions to an energy that is used for irradiation, where the magnetic fields of the ECR ion source are matched to operation of the ECR ion source for lightweight ions, such that the ECR ion source is operated in the afterglow mode. In the afterglow mode, an afterglow beam pulse is emitted from the ECR ion source after a microwave resonance pulse has been switched off. The current level of the afterglow beam pulse is higher than a current that is emitted from the ECR ion source during use of the microwave resonance pulse.</p> |
