论文标题
低温烘焙期间，niobium中的空置氢相互作用
Vacancy-Hydrogen Interaction in Niobium during Low-Temperature Baking
论文作者
论文摘要
最近发现的改良的低温烘烤导致表面损失减少，并增加了超导特斯拉形状腔的加速梯度。我们将表明，低温烘焙处的空位 - 氢配合物的动力学导致在2 \，K处抑制有损耗的纳米氢化物，从而显着增强了加速器性能。利用多普勒宽广的歼灭光谱，正电子歼灭寿命光谱和仪器纳米凹陷，研究了由欧洲Xfel Niobium片制成的样品。我们研究了批量样品和地下区域中空缺的演变，并在{\ it in intu}和{\ it ex-situ}退火过程中与氢的相互作用在不同的温度水平上的相互作用。
A recently discovered modified low-temperature baking leads to reduced surface losses and an increase of the accelerating gradient of superconducting TESLA shape cavities. We will show that the dynamics of vacancy-hydrogen complexes at low-temperature baking lead to a suppression of lossy nanohydrides at 2\,K and thus a significant enhancement of accelerator performance. Utilizing Doppler broadening Positron Annihilation Spectroscopy, Positron Annihilation Lifetime Spectroscopy and instrumented nanoindentation, samples made from European XFEL niobium sheets were investigated. We studied the evolution of vacancies in bulk samples and in the sub-surface region and their interaction with hydrogen at different temperature levels during {\it in-situ} and {\it ex-situ} annealing.
