Richard J. Temkin *
Plasma Science and Fusion Center, Massachusetts Institute of Technology
Cambridge, MA 02139 USA
* Email: email@example.com
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Abstract: Gyrotron oscillators are vacuum electron devices that have delivered megawatt average power levels at millimeter wavelengths. The lack of other sources that are able to match these power levels at high frequency, with the exception of much bulkier free-electron lasers, makes the gyrotron the oscillator of choice in many applications such as plasma heating, materials processing, and plasma diagnostics. Although the main attractiveness of the gyrotron resides in its high power capability, the ability to extend the frequency of operation into the terahertz frequency band is another attractive feature of the gyrotron. In addition, some applications would also benefit from having a frequency-tunable generator. For instance, the operation of a nuclear magnetic resonance (NMR) spectrometer enhanced by dynamic nuclear polarization (DNP) would be greatly simplified by utilizing a continuously tunable continuous-wave (CW) gyrotron. This paper describes the development and application of terahertz frequency gyrotron oscillators and sub-terahertz gyrotron amplifiers for the program of research on DNP/NMR. It will also describe the development of ancillary components such as low-loss waveguide for transmission of the terahertz radiation.
Keywords: Gyrotron, NMR, Terahertz spectroscopy, Terahertz waveguide.
Acknowledgments: The author gratefully thanks students, collaborators and coworkers at MIT (please see the references) in the fields of gyrotron and DNP/NMR research. The gyrotron development described in this paper was supported by the National Institutes of Health, NIBIB, through grants EB001965 and EB004866.
Cite this article:
Richard J. Temkin.(Invited paper) Development of terahertz gyrotrons for spectroscopy at MIT[J]. International Journal of Terahertz Science and Technology, 2014, Vol.7, No.1: 1-9. DOI:10.11906/TST.001-009.2014.03.01