A new high parallel-field spectrometer at TRIUMF’s β-NMR facility

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 bea...

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Bibliographic Details
Published in:	Review of scientific instruments 2023-02, Vol.94 (2), p.023305-023305
Main Authors:	Thoeng, Edward, McFadden, Ryan M. L., Saminathan, Suresh, Morris, Gerald D., Kolb, Philipp, Matheson, Ben, Asaduzzaman, Md, Baartman, Richard, Dunsiger, Sarah R., Fujimoto, Derek, Junginger, Tobias, Karner, Victoria L., Kiy, Spencer, Li, Ruohong, Stachura, Monika, Ticknor, John O., Kiefl, Robert F., MacFarlane, W. Andrew, Laxdal, Robert E.
Format:	Article
Language:	eng
Subjects:	Electromagnetic fields High vacuum Ion beams Ion optics NMR spectroscopy Scientific apparatus & instruments
Online Access:	Get full text
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Summary:	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, and 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.
ISSN:	0034-6748 1089-7623