High-harmonic gyrotron with sectioned cavity

High-harmonic large-orbit gyrotrons require long-length operating cavities because of both a weak electron-wave coupling and relativeily low electron currents. Since diffraction Q-factors of such cavities are very high, a great share of radiated rf power is spent to Ohmic losses. In this letter, a sectioned klystronlike cavity is proposed as a way to combine a long electron-wave interaction region with a relatively low diffraction Q-factor. In addition, the use of such a cavity makes a relatively broadband frequency tuning possible.

[1]  V. Manuilov,et al.  Large-Orbit Gyrotron operation in terahertz frequency range , 2009, 2009 IEEE International Conference on Plasma Science - Abstracts.

[2]  T. Idehara,et al.  Review of Subterahertz and Terahertz Gyrodevices at IAP RAS and FIR FU , 2009, IEEE Transactions on Plasma Science.

[3]  Adrian W. Cross,et al.  Axis-encircling electron beam generation using a smooth magnetic cusp for gyrodevices , 2008 .

[4]  G. Nusinovich,et al.  Electron energy recuperation in gyrodevices , 2008 .

[5]  Teruo Saito,et al.  Long Pulse Operation of the THz Gyrotron with a Pulse Magnet , 2008 .

[6]  G. Golubiatnikov,et al.  Generation of 1.5-kW, 1-THz coherent radiation from a gyrotron with a pulsed magnetic field. , 2008, Physical review letters.

[7]  M. Glyavin,et al.  A high harmonic gyrotron with an axis-encircling electron beam and a permanent magnet , 2004, IEEE Transactions on Plasma Science.

[8]  Gregory S. Nusinovich,et al.  Introduction to the Physics of Gyrotrons , 2004 .

[9]  Sergey V. Samsonov,et al.  Moderately relativistic high-harmonic gyrotrons for millimeter/submillimeter wavelength band , 1999 .

[10]  A. Phelps,et al.  Recovery of electron energy in cyclotron autoresonance masers , 1997 .

[11]  G. Denisov,et al.  To the problem of energy recuperation in gyrotrons , 1995 .

[12]  Hayashi,et al.  Major Improvement of Gyrotron Efficiency with Beam Energy Recovery. , 1994, Physical review letters.

[13]  Toshitaka Idehara,et al.  A 150–600 GHz step‐tunable gyrotron , 1993 .

[14]  K. Irwin,et al.  Second generation, high‐power, fundamental mode large‐orbit gyrotron experiments , 1991 .

[15]  T. Idehara,et al.  Development of a second cyclotron harmonic gyrotron operating at 0.8 mm wavelength , 1990 .

[16]  T. Antonsen,et al.  Mode competition and suppression in free electron laser oscillators , 1989 .

[17]  W. Destler,et al.  High-Power Microwave Generation from a Large-Orbit Gyrotron in Vane and Hole-and-Slot Conducting Wall Geometries , 1985, IEEE Transactions on Plasma Science.

[18]  N. Luhmann,et al.  Small-Signal Theory of a Large-Orbit Electron-Cyclotron Harmonic Maser, , 1983 .

[19]  M. Petelin,et al.  Nonstationary generation in free electron lasers , 1981 .