Development of a Compact sub-THz Gyrotron FU CW CI for Application to High Power THz Technologies

Abstract

For application of high frequency gyrotron to high power THz technology, Gyrotron FU CW series is being developed in FIR FU. Gyrotron FU CW CI is developed as one of sub-THz gyrotrons included in the series. The advantage of the gyrotron is compactness using a compact superconducting magnet and compact power supply system, which makes the accesses of the gyrotron to applied large-scale devices easier and extends the applications of gyrotron to wider fields. The designed frequency and cavity mode are 394.5 GHz and TE 26 mode for application to the 600 MHz DNP-NMR spectroscopy. As the operation results, the frequency and the output power were 394.03 GHz and around 30 W, respectively, which are available for the application to the 600 MHz DNP-NMR measurement. In addition, this gyrotron can operate at many other frequencies and cavity modes for application to high power THz technologies in wide fields. In this paper, the design and the operation results including long pulse or CW mode are presented.

Efficient Frequency Step-Tunable Megawatt-Class <inline-formula> <tex-math notation="LaTeX">$D$ </tex-math></inline-formula>-Band Gyrotron

“…However, this application requires sources, which are continuously tunable around the resonance frequency [5].…”

Semiconductor superlattice diodes for detection of terahertz photons: The role of hybridization of the plasma and polar-optical phonon modes

“…Recently, a significant progress in the development of various powerful sources of pulsed terahertz (THz) radiation has been reached. In this content one can mention the fast development of the optically pumped THz molecular lasers 1 , the high-power THz radiation sources from relativistic electrons 2 , the pulsed sub-terahertz and terahertz gyrotrons 3,4 , and the free electron lasers (FELs) [5][6][7] . These sources seem to be very promising in terms of a number of applications such as THz-wave imaging, biological sciences, and pump-probe studies of dynamical properties of materials [1][2][3][4][5][6][7] .…”

“…In this content one can mention the fast development of the optically pumped THz molecular lasers 1 , the high-power THz radiation sources from relativistic electrons 2 , the pulsed sub-terahertz and terahertz gyrotrons 3,4 , and the free electron lasers (FELs) [5][6][7] . These sources seem to be very promising in terms of a number of applications such as THz-wave imaging, biological sciences, and pump-probe studies of dynamical properties of materials [1][2][3][4][5][6][7] . In this regard, a number of new concepts of THz pulsed radiation detectors having a rather high sensitivity, a short time of response, and a wide dynamic range has been put forward.…”

Medium power compact sources of electromagnetic radiation in millimeter and sub-millimeter ranges

“…Existing gyrotrons are powerful devices but they are huge, expensive and difficult in operation complexes [2]. Another and main technical disadvantage of gyrotrons is narrow frequency range [3].…”

“…[1] However, at present a lot of customers are unable to use the advantages of the THz wave applications because of the absence of compact, easy in service sources. Existing gyrotrons are powerful devices but they are huge, expensive and difficult in operation complexes [2]. Another and main technical disadvantage of gyrotrons is narrow frequency range [3].…”