Charged particle beams from accelerators driven by radiofrequency or with beam scanners possess time structures (i.e., pulse beam operations). However, it is not clear whether the irradiation effects of these pulse beam operations are the same as those of continuous beams, although the average damage rate is the same in both cases. In this study, the difference between continuous beams and pulse beams, and the effect of the repetition frequency and pulse duration on the defect accumulation are evaluated by the rate equation analysis for Al and Fe. The growth rate of interstitial type dislocation loops in Al is simulated with fixed duty ratios (constant pulse duration over the irradiation period) at 453 K. The effect of pulse duration on a constant period of 1 s is simulated in Fe, changing the pulse duration from 1 to 10⁻⁶ s, while the damage (dpa) caused by one pulse remains the same. The results are analyzed and the effects of pulse duration and repetition rate on the damage structure evolution are demonstrated in relation to materials parameters.

来自由射频驱动或由束扫描器驱动的加速器的带电粒子束具有时间结构（即脉冲束操作）。但是，尽管两种情况下的平均损坏率相同，但不清楚这些脉冲束操作的照射效果是否与连续束相同。在这项研究中，通过铝和铁的速率方程分析，评估了连续光束和脉冲光束之间的差异，以及重复频率和脉冲持续时间对缺陷累积的影响。以固定占空比（辐照期间的恒定脉冲持续时间）在453 K下模拟Al中间隙型位错环的生长速率。在Fe中模拟脉冲持续时间对1 s恒定周期的影响，改变脉冲持续时间从1到10 ^-6s，而一个脉冲造成的损坏（dpa）保持不变。分析结果，并证明脉冲持续时间和重复率对损伤结构演变的影响与材料参数有关。