Frequency-Agile Instrumentation for High Field DNP/EPR Spectroscopy
The 19th session of the Global NMR Discussion Meeting was held on 24th November 2020 via Zoom. Dr. Thorsten Maly gave a talk on versatile, frequency-agile instrumentation for high field dynamic nuclear polarization/electron paramagnetic resonance spectroscopy. The video was recorded live during the presentation and serves as an educative lecture. Bio: 2005 Ph.D. in Chemistry, JWG University Frankfurt, Germany (group of Prof. Thomas Prisner) 2005-2010 Postdoc, MIT, Cambridge, USA (group of Prof. Bob Griffin) 2010-present: co-founder Bridge12 Technologies, Inc., Framingham USA
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Abstract: To further improve the DNP methodology it is crucial to understand the EPR properties of the DNP sample at the field of the DNP experiment. However, gyrotron-based DNP system only offer limited flexibility to extract EPR parameters. In this tutorial, I will review frequency-agile instrumentation suitable for high-frequency DNP and EPR spectroscopy. I will discuss strategies for generating and detecting microwave radiation and will present the fundamental basics of quasi- optics, necessary to separate the incident from the reflected microwave beam.