Optimization of THz Wave Coupling into Samples in DNP/NMR Spectroscopy
Name
Griffin_Optimization of.pdf
Size
931.53 KB
Format
Adobe PDF
Checksum (MD5)
bc387baf6fa47409c875e762598ca581
Author(s)
Barnes, Alexander
Corzilius, Bjorn
Griffin, Robert Guy
Matsuki, Yoh
Nanni, Emilio Alessandro
Woskov, Paul P.
Temkin, Richard J
Date Issued
October 2010
Journal
Proceedings of the 35th International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2010
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Barnes, Alexander et al. "Optimization of THz wave coupling into samples in DNP/NMR spectroscopy." Proceedings of the 2010 IEEE International Conference on Millimeter and Terahertz Waves: 1-3. © Copyright IEEE
Version
Final published version
Abstract
High power millimeter wave and terahertz sources are used in DNP/NMR spectroscopy to greatly enhance the NMR signal. A key issue is the efficient coupling of the source power to the sample. We present HFSS calculations showing that the MIT 250 GHz DNP/NMR system provides a B[subscript 1] value of 13 μT/W[superscript 1/2]. The simulation shows the importance of the diffraction of radiation passing through the RF coil, leading to non-uniform illumination of the sample. A simple single pass model yields insight into the origin of the observed B[subscript 1] value. Methods of optimizing the B[subscript 1] value are described.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology)
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1109/ICIMW.2010.5612956
