论文标题
Triumf $β$ -NMR设施的新的高平行场光谱仪
A New High Parallel-Field Spectrometer at TRIUMF's $β$-NMR Facility
论文作者
论文摘要
已经建立了一个新的高场光谱仪，以扩展Triumf的$β$检测到的核磁共振（$β$ -NMR）设施的功能。这种新的梁线扩展可以使$β$ -NMR光谱法使用与样品表面平行的200吨（垂直于离子束）平行于200 mt的场进行，从而使对局部电磁场的深度分辨研究具有比以前在此配置中更高的磁场上的旋转极化探针的局部电磁场。主要的动机和应用是允许研究超导射频（SRF）材料，靠近NB金属的临界场，该材料广泛用于制造SRF腔。此处介绍了设计注意事项的详细信息和超高真空（UHV）系统，离子光学，梁诊断的细节。这里还报道了使用放射性离子对光束线和光谱仪进行调试。还描述了其他领域的未来能力和应用。
A new high field spectrometer has been built to extend the capabilities of the $β$-detected nuclear magnetic resonance ($β$-NMR) facility at TRIUMF. This new beamline extension allows $β$-NMR spectroscopy to be performed with fields up to 200 mT parallel to a sample's surface (perpendicular to the ion beam), allowing depth-resolved studies of local electromagnetic fields with spin polarized probes at a much higher applied magnetic field than previously available in this configuration. The primary motivation and application is to allow studies of superconducting radio frequency (SRF) materials, close to the critical fields of Nb metal, which is extensively used to fabricate SRF cavities. The details of the design considerations and implementation of the ultra-high vacuum (UHV) system, ion optics, beam diagnostics are presented here. Commissioning of the beamline and spectrometer with radioactive ions are also reported here. Future capabilities and applications in other areas are also described.
