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

Alberti, S; Ansermet, J-P; Avramides, KA; Fasel, D; Hogge, J-P; Kern, S; Lievin, C; Liu, Y; Macor, A; Pagonakis, I; Silva, M; Tran, MQ; Tran, TM; Wagner, D

dc.contributor.author	Alberti, S	en
dc.contributor.author	Ansermet, J-P	en
dc.contributor.author	Avramides, KA	en
dc.contributor.author	Fasel, D	en
dc.contributor.author	Hogge, J-P	en
dc.contributor.author	Kern, S	en
dc.contributor.author	Lievin, C	en
dc.contributor.author	Liu, Y	en
dc.contributor.author	Macor, A	en
dc.contributor.author	Pagonakis, I	en
dc.contributor.author	Silva, M	en
dc.contributor.author	Tran, MQ	en
dc.contributor.author	Tran, TM	en
dc.contributor.author	Wagner, D	en
dc.date.accessioned	2014-03-01T02:46:06Z
dc.date.available	2014-03-01T02:46:06Z
dc.date.issued	2009	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32543
dc.subject	High Frequency	en
dc.subject	Low Power	en
dc.subject	Nmr Spectroscopy	en
dc.subject	Solid State Nmr	en
dc.subject	Superconducting Magnets	en
dc.subject	Electron Beam	en
dc.subject	Electron Cyclotron	en
dc.subject	Second Harmonic	en
dc.subject.other	Electron cyclotron frequency	en
dc.subject.other	Gyrotron design	en
dc.subject.other	High frequency HF	en
dc.subject.other	Low Power	en
dc.subject.other	NMR spectrometer	en
dc.subject.other	NMR spectroscopy	en
dc.subject.other	Proton NMR	en
dc.subject.other	Reference parameters	en
dc.subject.other	RF frequencies	en
dc.subject.other	Second harmonics	en
dc.subject.other	Solid-state NMR spectroscopy	en
dc.subject.other	Cyclotrons	en
dc.subject.other	Electron beams	en
dc.subject.other	Electron guns	en
dc.subject.other	Helium	en
dc.subject.other	Nuclear magnetic resonance	en
dc.subject.other	Nuclear magnetic resonance spectroscopy	en
dc.subject.other	Optical frequency conversion	en
dc.subject.other	Spectrometers	en
dc.subject.other	Spectrometry	en
dc.subject.other	Spin polarization	en
dc.subject.other	Superconducting magnets	en
dc.subject.other	Gyrotrons	en
dc.title	Design of a frequency-tunable gyrotron for DNP-enhanced NMR spectroscopy	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/ICIMW.2009.5324906	en
heal.identifier.secondary	5324906	en
heal.identifier.secondary	http://dx.doi.org/10.1109/ICIMW.2009.5324906	en
heal.publicationDate	2009	en
heal.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 (1H) 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. © 2009 IEEE.	en
heal.journalName	34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009	en
dc.identifier.doi	10.1109/ICIMW.2009.5324906	en