医用同步加速器多圈注入效率的优化
Optimization of the Multi-turn Injection Efficiency for Medical Synchrotron
摘要：
本文提出了一种医用同步加速器多圈注入效率的优化方法。我们表明，对于给定的注入能量，注入效率可以大大提高通过适当地选择横向调谐以及优化注入凸块和束注入所需的匝数。我们验证了我们的研究通过应用该方法的韩国重离子医疗加速器（KHIMA）同步加速器，这是目前建在校园的Dongnam放射和医学科学研究所（DIRAMS）在韩国釜山。首先，在ELEGANT和ACCSIM代码的帮助下进行频率图分析。然后选择产生良好喷射效率的调谐。通过这些调谐，然后通过在注入之后跟踪多达一千圈的粒子数量来优化注入凸块和注入所需的圈数，超过一千圈就没有进一步的光束损失。给出了质子离子注入效率的优化结果。
英文摘要：
We present a method for optimization of the multi-turn injection effciency for medical synchrotron. We show that for given injection energy the injection efficiency can be greatly enhanced by choosing transverse tunes appropriately as well as optimizing the injection bump and the number of turns required for beam injection. We verify our study by applying the method to the Korea Heavy Ion Medical Accelerator (KHIMA) synchrotron which is currently built at the campus of Dongnam Institute of Radiological and Medical Sciences (DIRAMS) in Busan, Korea. First the frequency map analysis is performed with the help of ELEGANT and ACCSIM codes. The tunes which yield the good injection efficiency are then selected. With these tunes the injection bump and the number of turns required for injection are then optimized by tracking a number of particles up to one thousand turns after injection beyond which there is no further beam loss. Results for optimization of the injection efficiency for proton ion are presented.
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