Tunable second harmonic gyrotron based on a 12 T superconducting, cryogen-free magnet

Arne W. Fliflet, Steven H. Gold

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Near-THz gyrotrons are of interest for applications such as remote sensing, materials processing, and dynamic nuclear polarization (DNP) enhanced nuclear magnetic resonance (NMR) applications. We are setting up a gyrotron test-bed based on a Cryomagnetics 12-T cryogen-free, 3-inch warm-bore, superconducting magnet to investigate second- and higher-harmonic gyrotrons operating at frequencies up to 1 THz. The first experiments are designed to operate at the second harmonic at frequencies up to 600 GHz and powers in the kilowatt range. A triode electron gun operating at 30-60 kV and 0.5-2 A will be used. A Vlasov-type output coupler designed using geometric optics will be used to extract the output power as a quasi-Gaussian beam. An interaction cavity based on the TE 15,2 mode with an effective length of about 1 cm and a Q of 7400 has been designed. The ability to tune the output frequency is important for many applications and is an important objective of this research. Calculations of the expected continuous and step tuning achievable with this cavity will be discussed. Other design calculations and the status of the experiment will be presented.

Original languageEnglish (US)
Title of host publicationIRMMW-THz 2011 - 36th International Conference on Infrared, Millimeter, and Terahertz Waves
DOIs
StatePublished - Dec 1 2011
Externally publishedYes
Event36th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2011 - Houston, TX, United States
Duration: Oct 2 2011Oct 7 2011

Publication series

NameIRMMW-THz 2011 - 36th International Conference on Infrared, Millimeter, and Terahertz Waves

Conference

Conference36th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2011
Country/TerritoryUnited States
CityHouston, TX
Period10/2/1110/7/11

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Tunable second harmonic gyrotron based on a 12 T superconducting, cryogen-free magnet'. Together they form a unique fingerprint.

Cite this