Transmission Line for 258 GHz Gyrotron DNP Spectrometry

Transmission Line for 258 GHz Gyrotron DNP Spectrometry

We describe the design and test results of the transmission line for liquid-state (LS) and solid-state (SS) DNP spectrometers with the second-harmonic 258.6 GHz gyrotron at the Institute of the Biophysical Chemistry Center of Goethe University (Frankfurt). The 13-meter line includes a mode converter...

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Veröffentlicht in:Journal of infrared, millimeter and terahertz waves millimeter and terahertz waves, 2011-06, Vol.32 (6), p.823-837
Hauptverfasser: Bogdashov, Alexandr A., Belousov, Vladimir I., Chirkov, Alexey V., Denisov, Gregory G., Korchagin, Vyacheslav V., Kornishin, Sergey Yu, Tai, Evgeny M.
Format: Artikel
Sprache:eng
Schlagworte:
Bends
Classical Electrodynamics
Converters
Directional couplers
Electrical Engineering
Electronics and Microelectronics
Engineering
Goethe, Johann Wolfgang von (1749-1832)
Gyrotrons
Infrared
Instrumentation
Microwaves
Organic chemistry
Polarizers
Spectrometers
Spectrometry
Switches
Transmission lines
Waveguides
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Beschreibung
Zusammenfassung:We describe the design and test results of the transmission line for liquid-state (LS) and solid-state (SS) DNP spectrometers with the second-harmonic 258.6 GHz gyrotron at the Institute of the Biophysical Chemistry Center of Goethe University (Frankfurt). The 13-meter line includes a mode converter, HE11 waveguides, 4 mitre bends, a variable polarizer-attenuator, directional couplers, a water-flow calorimeter and a mechanical switch. A microwave power of about 15 W was obtained in the pure HE11 mode at the spectrometer inputs.
ISSN:1866-6892
1866-6906
DOI:10.1007/s10762-011-9787-4