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Numerical Study of a Low-Voltage Gyrotron ("Gyrotrino") for DNP/NMR Spectroscopy
KTH, School of Electrical Engineering (EES), Micro and Nanosystems. Russian Acad Sci, Russia.
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2017 (English)In: IEEE Transactions on Plasma Science, ISSN 0093-3813, E-ISSN 1939-9375, Vol. 45, no 4, 644-648 p.Article in journal (Refereed) Published
Abstract [en]

Feasibility of a gyrotron for the dynamic nuclear polarization (DNP) purpose, integrated with nuclear magnetic resonance (NMR) spectrometer inside a single cryomagnet, is analyzed on the basis of numerical simulations. The necessary condition for DNP is matching of the gyrotrino and DNP frequencies. This imposes a strong restriction on the gyrotron operating voltage, which should be less than 2 kV. The most part of the uniform magnetic field region in the cryomagnet is occupied by a sample with NMR probe, so there is a very limited space for the gyrotron cavity. This dictates a number of peculiarities for the gyrotrino design, in particular, the diffraction power output from the cathode end of the cavity and collecting of a thin electron beam in a strong magnetic field. According to simulations, the gyrotrino operating at the fundamental cyclotron resonance with a voltage of 1.5 kV can provide an output power of 10-20 W at a frequency of 264 GHz, which is suitable for many NMR-DNP experiments.

Place, publisher, year, edition, pages
IEEE, 2017. Vol. 45, no 4, 644-648 p.
Keyword [en]
Collector, dynamic nuclear polarization (DNP), gyrotron, low voltage, nuclear magnetic resonance (NMR) spectroscopy
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-208268DOI: 10.1109/TPS.2017.2673550ISI: 000399724600007Scopus ID: 2-s2.0-85014818883OAI: oai:DiVA.org:kth-208268DiVA: diva2:1109637
Note

QC 20170614

Available from: 2017-06-14 Created: 2017-06-14 Last updated: 2017-06-30Bibliographically approved

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CiteExportLink to record
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Citation style
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