论文标题
SRF腔中的氮掺杂和输注：综述
Nitrogen Doping and Infusion in SRF Cavities: A Review
论文作者
论文摘要
在过去的40年中，SRF技术的进步允许实现与峰值表面磁场相对应的距离接近Niobium理论极限的加速梯度。但是，随着加速梯度的增加，质量因子显着降低。由于增加了RF场会增加准粒子的数量，因此预期会减少这种减少。最近，当SRF腔与某些非磁性杂质掺杂时，已经观察到了一种新的质量因子增加现象。特别是，已经成功实施了氮内表面的氮腔内表面的扩散。这一追求仍在继续进行过程开发，以实现具有高质量因素的高加速梯度SRF结构，以实现未来的高功率加速器。在这里，我们通过氮扩散，材料分析和当前的Q0 SRF腔中的当前理论理解介绍了研究和开发的综述。
Advances in SRF technology over the last 40 years allowed achieving accelerating gradients ~ 50 MV/m corresponding to peak surface magnetic field close to the theoretical limit of niobium. However, the quality factor decreases significantly with increasing accelerating gradient. This decrease is expected since increasing the rf field increases the number of quasiparticles and therefore the rf losses. Recently, a new phenomenon of increase in quality factor with the accelerating gradient has been observed when SRF cavities are doped with certain non-magnetic impurities. In particular, the diffusion of nitrogen into the niobium cavities inner surface has been has been successfully implemented into the commercialization of SRF technology. The quest is still ongoing towards process development to achieve high accelerating gradient SRF structures with high quality factors for future high power accelerators. Here, we present the review of the research and development via nitrogen diffusion, materials analysis and current theoretical understanding in high Q0 SRF cavities.
