NDLI: Design of a frequency-tunable gyrotron for DNP-enhanced NMR spectroscopy

Content Provider	IEEE Xplore Digital Library
Author	Alberti, S. Ansermet, J.-P. Avramides, K.A. Fasel, D. Hogge, J.-P. Kern, S. Lievin, C. Liu, Y. Macor, A. Pagonakis, I. Silva, M. Tran, M.Q. Tran, T.M. Wagner, D.
Copyright Year	2009
Description	Author affiliation: Institut de Physique de la Matière Condensée, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland (Ansermet, J.-P.) \|\| Centre de Recherche en Physique des Plasmas, Association EURATOM-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland (Alberti, S.; Fasel, D.; Hogge, J.-P.; Macor, A.; Pagonakis, I.; Silva, M.; Tran, M.Q.; Tran, T.M.) \|\| Max-Planck-Institut für Plasmaphysik, EURATOM-IPP, Garching, Germany (Wagner, D.) \|\| Thales Electron Devices, Vélizy-Villacoublay, France (Lievin, C.) \|\| Forschungszentrum Karlsruhe (FZK), Association EURATOM-FZK, IHM, 76021 Karlsruhe, Germany (Kern, S.; Liu, Y.) \|\| School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou st. GR-15772 Athens, Greece (Avramides, K.A.)
Abstract	We report on the design of a modular low-power (10–50W) high-frequency gyrotron (265–530GHz) for DNP enhanced Solid-State NMR spectroscopy. With the view of covering a wide range of frequencies, a 9.7T helium-free superconducting magnet (SCM) is planned for the gyrotron operation on either the fundamental or second harmonic of the electron cyclotron frequency. The gyrotron design is based on a triode electron gun (Vk=15kV, Ib=100mA, Va= 6–8kV) which is very flexible for adapting the electron beam properties to a wide variety of cavities operating at the fundamental or at the second harmonic. The gyrotron is designed for a lateral output with an internal Vlasov-type converter. The reference parameters for application of DNP-enhanced NMR spectroscopy on a 400MHz $(^{1}H)$ spectrometer are optimized with a RF frequency tunability corresponding to twice the proton NMR frequency. The modularity of the construction of the gyrotron allows for the possibility of changing only some elements like the cavity-uptaper system in order to adapt to the wide range of NMR spectrometers existing at EPFL.
Starting Page	1
Ending Page	2
File Size	493625
Page Count	2
File Format	PDF
ISBN	9781424454167
DOI	10.1109/ICIMW.2009.5324906
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-21
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gyrotrons Nuclear magnetic resonance Spectroscopy Electron beams Solid state circuits Superconducting magnets Cyclotrons Radio frequency Protons Modular construction
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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