Long Pulse Operation of the THz Gyrotron with a Pulse Magnet

Self Cite

A high frequency gyrotron with a 15 T superconducting magnet named Gyrotron FU CW VI has achieved continuous frequency tuning through the relatively wide range of 1.5 GHz near 400 GHz. The operation is at the fundamental cyclotron resonance of the TE 06 cavity mode with many higher order axial modes. The output power measured at the end of the circular waveguide system ranges from 10 to 50 watts at the low acceleration voltage of 12 kV for beam electrons. The beam current is also low. It is around 250 mA. This gyrotron is designed as a demountable radiation source for the 600 MHz DNP-NMR spectroscopy. The design and operation results of the gyrotron FU CW VI are presented.

mentioning

confidence: 68%

Continuously Frequency Tunable High Power Sub-THz Radiation Source—Gyrotron FU CW VI for 600 MHz DNP-NMR Spectroscopy

Idehara

Kosuga

Agusu

et al. 2010

Self Cite

“…The gyrotron FU CW III is the first radiation source of this series which has surpassed the threshold of 1 THz [28,29]. It has a 20 T superconducting magnet and a demountable tube.…”

Section: Gyrotron Fu Cw IIImentioning

confidence: 99%

“…It has a 20 T superconducting magnet and a demountable tube. The design of this tube has been produced on the basis of the experience gained during the experimentation with its predecessor -the first terahertz gyrotron with a pulsed ice-protected solenoid with maximum field intensity of 20.5 T [8,28]. The diameter and the length of the regular part of the resonant cavity are 3.9 mm and 10 mm, respectively and are the same as in the pulse tube [30].…”

Section: Gyrotron Fu Cw IIImentioning

confidence: 99%

Development and Applications of High—Frequency Gyrotrons in FIR FU Covering the sub-THz to THz Range

Idehara

Sabchevski

2012

Powerful sources of coherent radiation in the sub-terahertz and in the terahertz frequency range of the electromagnetic spectrum are necessary for a great and continuously expanding number of applications in the physical research and in various advanced technological processes as well as in radars, communication systems, for remote sensing and inspection etc.. In recent years, a spectacular progress in the development of various gyrodevices and in particular of the powerful high frequency (sub-terahertz and terahertz) gyrotron oscillators has demonstrated a remarkable potential for bridging the so-called terahertz power gap and stimulated many novel and prospective applications. In this review paper we outline two series of such devices, namely the Gyrotron FU Series which includes pulsed gyrotrons and Gyrotron FU CW Series which consist of tubes operated in a CW (continuous wave) or long pulse mode, both developed at the FIR FU Center. We present the most remarkable achievements of these devices and illustrate their applications by some characteristic examples. An outlook for the further extension of the Gyrotron FU CW Series is also provided.

“…FELs can produce extremely short (picoseconds) pulses with wide spectrum which is promising for many applications. In comparison with the FELs, sub-terahertz and terahertz gyrotrons are capable of generating the same or even higher level of average power using significantly lower electron energy of tens of keV [11][12][13][14][15]. Correspondingly, they are much more compact than FELs and available for many laboratories.…”

Section: Introductionmentioning

confidence: 99%

Gyrotron Development for High Power THz Technologies at IAP RAS

Bratman

Богдашов

Денисов

et al. 2012

The review summarizes recent experimental results in the field of THz gyrotrons developed for various applications. A CW gyrotron with the operation frequency of 0.26 THz has been successfully used for DNP spectroscopy A pulsed high-harmonic Large Orbit Gyrotron (LOG) with the frequency of 0.55 THz and kW level of output power has been used for THz breakdown and obtaining dense plasma in gases. A powerful pulsed 0.67 THz/200 kW gyrotron is under development for remote detection of ionization sources.