不锈钢电子束收集极的损伤能量密度阈值

Damage threshold of energy density of stainless steel electron beam collector

对强磁场相对论返波管系统中电子束收集极损伤的主要影响因素进行了分析,通过设计并使用锥面不锈钢收集极,提高了收集极的耐电子束轰击能力。在单次实验条件下,研究了电子束能量密度对不锈钢收集极表面损伤及系统产生微波的影响,结合对无箔二极管中电子束空间密度分布的研究结果,给出了不锈钢收集极损伤电子束能量密度阈值范围。

The major factor that leads to the damage of electron beam collector in relativistic backward wave oscillators with high magnetic field is analyzed. By tapering stainless steel collectors, the ability of collectors to bear the impact of high current e- lectron beams is improved. In single shot experiment, the effects of electron beam energy density on the surface damage of stain- less steel collectors and the generation of microwave are studied. Based on the experimental results, damage threshold range of stainless steel collectors with respect to electron beam energy density is brought forward with the research on the space density distribution of intense electron beams in the foilless diode.