Abstract
Gyrotron FU CW Series which consists of 9 gyrotrons, has been designed and constructed as high power THz radiation sources and completed operational tests successfully in the Research Center for Development of Far Infrared Region, University of Fukui (FIR FU). The gyrotron series covers wide frequency range in sub-THz to THz region. Gyrotrons included in the series can operate in continuous wave (CW) mode and the output power is ranged from several watts to several hundred watts. A few gyrotrons have been applied to ESR spectroscopy in THz region, DNP enhanced NMR spectroscopy and material processing. Some other gyrotrons will be applied soon for development of high power THz technologies, for example, X-ray detected magnetic resonance (XDMR) measurement, measurement on hyperfine structure of positronium, ESR echo experiment in sub-THz region, etc. In this manuscript, development of THz gyrotrons and their applications are presented.
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