[1] Thumm M, Alberti S, Arnold A et al. EU megawatt-class 140-GHz CW gyrotron[J]. IEEE transactions on plasma science, 35, 143-153(2007).

[2] Sakamoto K, Kasugai A, Kajiwara K et al. Progress of high power 170 GHz gyrotron in JAEA[J]. Nuclear Fusion, 49, 181-186(2009).

[3] Litvak A G, Denisov G G, Myasnikov V E et al. Development in Russia of Megawatt Power Gyrotrons for Fusion[J]. Journal of Infrared Millimeter & Terahertz Waves, 32, 337-342(2011).

[4] Glyavin M Y, Luchinin A G, Golubiatnikov G Y. Generation of 1.5-kW, 1-THz Coherent Radiation from a Gyrotron with a Pulsed Magnetic Field[J]. Physical Review Letters, 100, 015101.1-015101.3(2008).

[5] Idehara T, Ogawa I, Saito T et al. Development of THz gyrotrons and application to high power THz technologies[J]. Terahertz Science and Technology, 1, 100-106(2008).

[6] Thumm M. State-of-the-Art of High-Power Gyro-Devices and Free Electron Masers[J]. Journal of Infrared, Millimeter, and Terahertz Waves, 1-140(2020).

[7] Nusinovich G S, Thumm M K A, Petelin M I. The gyrotron at 50: Historical overview[J]. Journal of Infrared, Millimeter, and Terahertz Waves, 35, 325-381(2014).

[8] Idehara T, Saito T, Ogawa I et al. Development of Terahertz FU CW Gyrotron Series for DNP[J]. Applied Magnetic Resonance, 34, 265-275(2008).

[9] Vitzthum V, Caporini M A, Bodenhausen G. Solid-state nitrogen-14 nuclear magnetic resonance enhanced by dynamic nuclear polarization using a gyrotron[J]. Journal of Magnetic Resonance, 205, 177-179(2010).

[10] Sudiana I N, Ito R, Inagaki S et al. Densification of alumina ceramics sintered by using submillimeter wave gyrotron[J]. Journal of Infrared, Millimeter, and Terahertz Waves, 34, 627-638(2013).

[11] Lewis Iii D, Imam M A, Fliflet A W et al. Recent Advances in Microwave and Millimeter-Wave Processing of Materials[J]. Materials Science Forum, 539-543, 3249-3254(2007).

[12] Shi Shao-Hui, Liu Pu-Kun, Du Chao-Hai et al. A W band second harmonic gyrotron oscillator[J]. Journal of infrared and millimeter waves, 32, 408-413(2013).

[13] Ma G W, Huang Y H, Zhuo T T et al. Experimental study of a 95GHz gyrotron[C], 1-2(2015).

[14] Hu L L, Ma G W, Sun D M et al. Development of a 140 GHz 50kW Gyrotron in IAE[C], 1-2(2019).

[15] Guss W C, Grimm T L, Kreischer K E et al. Velocity ratio measurements of a gyrotron electron beam[J]. Journal of Applied Physics, 69, 3789-3795(1991).

[16] Paulini J, Klein T, Simon G. Thermo-field emission and the Nottingham effect[J]. Journal of Physics D: Applied Physics, 26, 1310-1315(1993).