Development and Application of THz Gyrotrons for Advanced Spectroscopic Methods

被引：11
|
作者：
Sabchevski, Svilen [1 ]
Glyavin, Mikhail [2 ]
机构：
[1] Bulgarian Acad Sci, Inst Elect, Sofia 1784, Bulgaria
[2] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia
来源：
PHOTONICS | 2023年 / 10卷 / 02期
关键词：
gyrotrons; spectroscopy; ESR; NMR-DNP; XDMR; molecular spectroscopy; positronium; DYNAMIC NUCLEAR-POLARIZATION; DETECTED MAGNETIC-RESONANCE; SUB-TERAHERTZ GYROTRON; PID FEEDBACK-CONTROL; HIGH-POWER; FREQUENCY STABILIZATION; RADIATION POWER; NMR; SPECTROMETER; MODULATION;
D O I：
10.3390/photonics10020189
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Nowadays, gyrotrons are used in numerous and diverse fields of research and technology. Their most prominent application is to electron cyclotron resonance plasma heating and current drive-in reactors for controlled thermonuclear fusion. Another matured field is the thermal microwave treatment of materials in industrial-grade gyrotron-based technological systems. The unique spectral properties of gyrotron radiation, frequency tunability, and the possibility for precise control and modulation of both the output power and frequency have made the gyrotrons attractive and appropriate radiation sources for various novel advanced spectroscopic techniques. Among them are ESR (electron spin resonance), NMR-DNP (nuclear magnetic resonance with a signal enhancement through dynamic nuclear polarization), XDMR (X-ray detected magnetic resonance), acoustic molecular spectroscopy, as well as high-precision spectroscopy for measuring the SFS (super-fine splitting of the energy levels of positronium). In this review paper, we present both the current status and the most remarkable recent achievements of these methods implemented in gyrotron-based spectroscopy systems and discuss the main trends in the development of their dedicated radiation sources operating in the THz frequency range.
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页数：16
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