Publication

Articles in international collected works and conference proceedings

2004 - 2005

  1. Yu.Bykov, G.Denisov, A.Eremeev, et al. Microwave Source Based on the 24 GHz 3kW Gyrotron With Permanent Magnet. The 29-th Int. Conference on Infrared and Millimeter Waves and 12-th Int. Conference on Terahertz Electronics, 2004, University of Karlsruhe, Germany, Conference Digest, p.M12 .3-191.

  2. V.E.Zapevalov,Yu.K.Kalynov, V.K.Lygin, O.V.Malygin, S.A.Malygin, M.A.Moiseev, V.N.Manuilov, V.I.Khizhnjak, E.A.Solujanova, E.M.Tai Low frequency gyrotrons for fusion // ElectronCyclotronEmissionandElectronCyclotronResonanceHeating. Proceeding of the 13th Joint Workshop, Nizhny Novgorod, Russia, May 17-20, 2004, Editor Alexander Litvak. Nizhny Novgorod 2005, pp.403-408
    For some experimental plasma set-ups powerful RF sources with frequency from 5 GHz up to 30 GHz are requested. The report presents the results of the low frequency poerful gyrotrons development in Russia. Several design versions of 5 GHz, 17.5 GHz and 28 GHz gyrotrons with output power 0.5-1 MW, its specific property details, special technical problems and test set-up are discussed. Test results for 5GHz/0.5 MW and 28GHz/0.5MW gyrotrons are presented.

  3. G.G.Denisov, I.I.Antakov, I.G.Gachev, V.K.Lygin, E.V.Sokolov, E.V.Zasypkin Studying of the 95/285 GHz gyrotron with frequency multiplication // Conf. Digest of the Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz  Electronics,  Williamsburg, Virginia, USA, September 19-23, 2005, pp. 435-436.

  4. G.G.Denisov, V.I.Belousov, A.V.Chirkov, A.G.Litvak, V.I.Malygin, M.Yu.Shmelyov, V.I.Kurbotov, I.V.Kazansky, E.A.Solujanova, E.M.Tai 200kW/CW Gyrotrons and Transmission Line Components for Fusion Systems // Proceedings of Sixth Int. Vacuum Electronics Conference IVEC2005, Noordwijk, The Netherlands, April 20-22, 2005, pp. 119-120.

  5. G.G.Denisov, A.A.Bogdashev, A.V.Chirkov, A.N.Kuftin, A.G.Litvak, V.K.Lygin, V.I.Malygin, M.A.Moiseev, V.E.Zapevalov, M.V.Agapova, A.Ph.Gnedenkov, V.N.Ilyin, D.V.Khmara, A.N.Kostyna, S.A.Malygin, V.E.Myasnikov, V.O.Nichiporenko, L.G.Popov, E.A.Soluyanova, E.M.Tai, S.V.Usachev, V.I.Ilyin New results in development of 170 GHz girotron for ITER // Proceedingsof 17-thJointRussian-GermanSTCMeetingonECRHandGyrotrons. Germany, Greinswald, May 30-June 4, 2005, pp. 109-117.

  6. G.G. Denisov, Yu.V. Bykov, A.G. Eremeev, V.V. Kholoptsev, M.Yu. Glyavin, A.G. Luchinin, G.I. Kalynova, I.V. Plotnikov, S.V. Samsonov Development of Gyrotron-Based Technological Systems at Gycom // IAP, The Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, September 2005, Williamsburg, Virginia, USA
    The line of gyro-device systems produced jointly by Gycom and IAP for millimeter-wave processing of materials has been extended by two new setups. The general description and major technical specifications of a 5 kW 24.1 GHz gyrotron-based system and a dual-frequency system exploiting a 15 kW 28 GHz gyrotron and a 2.5 kW 24.1 GHz gyro-backward-wave oscillator (BWO) frequency tuneable in the range of ¦0.5 GHz are presented.

  7. G.G.Denisov, A.G.Litvak, V.E.Myasnikov, E.M.Tai Recent Results in GYCOM/IAP Development of High-Power Gyrotrons for Fusion Installations // Proceedings of Sixth Int. Vacuum Electronics Conference IVEC2005, Noordwijk, The Netherlands, April 20-22, 2005, pp. 497-500.

  8. A.M.Gorbachev, A.L.Vikharev, A.V.Kozlov, V.A.Koldanov, A.G.Litvak, N.M.Ovechkin, Yu.V.Bykov, G.G.Denisov, V.V.Parshin, D.B.Radishev Recent results in the development of IAP/Gycom gyrotron diamond window // Proceedings of 17-th Joint Russian-German STC Meeting on ECRH and Gyrotrons. Germany, Greinswald, May 30-June 4, 2005, pp. 271-281.

  9. H.Hoshizuki, K.Matsuura, S.Mitsudo, T.Idehara, V.E. Zapevalov,  O.V. Malygin, V.I. Khizhnjak, T.Ueda, M.Furuiti, A. Kitano, H.Nishi and J.Ishibashi Development of the material processing system by using a 300 GHz gyrotron // The 30-th Int. Conference on Infrared and Millimeter Waves and 13-th Int. Conference on Terahertz Electronics, 2005, Sept.19- Sept.23 Williamsburg, Virginia, Conference Digest, p.375-376

  10. A.G.Litvak, G.G.Denisov, V.E.Myasnikov, E.M.Tai Recent Results in GYCOM/IAP Development of High-Power Gyrotrons for Fusion Installations // Conf. Digest of the Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz  Electronics,  Williamsburg, Virginia, USA, September 19-23, 2005, pp. 233-234.

  11. V.I. Malygin, A.V. Chirkov, G.G. Denisov, D.A. Lukovnikov, D.I. Sobolev New HE11 corrugated waveguide components with minimal diffraction losses // Conf. Digest of the Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz  Electronics, Williamsburg, Virginia, USA,  September 19-23, 2005, pp.  571-572.

  12. V.E.Mjasnikov, A.G.Litvak, S.V.Usachev, L.G.Popov, V.O.Nichporenko, M.V.Agapova, G.G.Denisov, A.A.Bogdashov, A.Ph.Gnedenkov, V.I.Ilyin, V.N.Ilyin, D.V.Khmara,, A.N.Kostyna, A.N.Kuftin, V.K.Lygin, M.A.Moiseev, V.I.Malygin, V.G.Usov, V.E.Zapevalov Development of 170GHz/1MW/ 50%/CW Gyrotron for ITER // ElectronCyclotronEmissionandElectronCyclotronResonanceHeating. Proceeding of the 13th Joint Workshop, Nizhny Novgorod, Russia, May 17-20, 2004, Editor Alexander Litvak. Nizhny Novgorod 2005, pp.320-325

  13. E.M.Tai, V.I.Kurbotov, S.A.Malygin, V.B.Orlov, E.A.Soluyanova, A.A.Bogdashev, G.G.Denisov, V.I.Malygin, A.B.Pavelev, D.I.Sobolev Development of CW girotron systems in 2004-2005 // Proceedings of 17-th Joint Russian-German STC Meeting on ECRH and Gyrotrons. Germany, Greinswald, May 30-June 4, 2005, pp. 135-144.

  14. V.E. Zapevalov,  V.K. Lygin,  O.V. Malygin,  M.A. Moiseev, V.P.Karpov, V.I. Khizhnjak,  E.M. Tai, T. Idehara, I. Ogawa, S. Mitsudo Development of the 300GHz/4kW/ CW Gyrotron // Sixth International Vacuum Electronics Conference IVEC 2005, 20-22 April 2005, Huis ter Duin, Nordwijk, The Netherlands, pp.121-122

  15. A. V. Chirkov, G. G. Denisov, D. A. Lukovnikov, V. 1. Malygin, D. I. Sobolev Low-loss waveguide components for transmission and control of high power microwave radiation in ECW systems // Proceedings of the International Workshop “Strong Microwaves in Plasmas”, Nizhny Novgorod, 25 July – 1 August 2005, p.p. 261-265.

  16. Yu. Ya. Brodsky, Yu. V. Bykov, A. V, Chirkov, G. G. Denisov, A. G. Eremeev, A. S. Fix, S. V. Golubev, A. A. Litvak, A. G. Litvak, L V. Lubyako, N. V. Lunin, V. I. Malygin, V. V. Parshin, A. O. Perminov, S. Putvinski, A. G. Shalashov, E. V. SuvorovMicrowave injector for "Archimedes" nuclear waste separator // Proceedings of the International Workshop “Strong Microwaves in Plasmas”, Nizhny Novgorod, 25 July – 1 August 2005, p.p. 288-293.

  17. G. G. Denisov, D. I. Sobolev A method of waveguide mode converter synthesis // Proceedings of the International Workshop “Strong Microwaves in Plasmas”, Nizhny Novgorod, 25 July – 1 August 2005, p.p. 342-346.

  18.   A. L. Vikharev, A. M. Gorbachev, A. V. Kozlov, V. A. Koldanov, A. G. Litvak, N, M. Ovechkin, Yu. V. Bykov, G G. Denisov, V. V. Parshin, D. B. Radishev Development of MPACVD technology for high-rate diamond production // Proceedings of the International Workshop “Strong Microwaves in Plasmas”, Nizhny Novgorod, 25 July – 1 August 2005, p.p. 613-625.

Articles in International scientific journals

2005

  1. G.G.Denisov and M.L.Kulygin  Numericfl Simulation of Waveguide TM01-TE11 Mode Converter Using FDTD Method // Int. Journal of Infrared and Millimeter Waves, vol. 26, №3, 2005,  pp. 341-361.
    We study a transmission problem of an electromagnetic pulse with given transversal structure passing through a waveguide converter from TM01 to TE11 mode of circular waveguide. Using FDTD numerical simulation method we have investigated mode structure of the pulse at the output of the converter and its dependence on pulse length at the input. Also we have obtained frequency characteristic by calculating Fourier response for a pulse with wide spectrum.

  2. A.A.Bogdashov, A.V.Chirkov, G.G.Denisov, A.N.Kuftin, Yu.V.Rodin, E.A.Solujanova and V.E.Zapevalov  High-Efficient Mode Converter for ITER Gyrotron // Int. Journal of Infrared and Millimeter Waves, vol. 26, №6, 2005, pp. 771-786.
    A high-efficiency converter of the operating mode to the wave beam for a high-power, high-frequency gyrotron has been proposed and manufactured.

  3. Alexandr Bogdashov, Gregory Denisov, Dmitry Lukovnikov, Yury Rodin and Jay Hirshfi  Ka-Band Resonant Ring for Testing Components for a High-Gradient Linear Accelerator // IEEE Transactions on Microwave Theory and Techniques, vol.53, No. 10, October 2005, pp. 3152-3154.
    A ring-shaped cavity with the TE01 millimeter wave traveling in an oversized cylindrical waveguide has been developed for accelerator experiments at high power levels. This cavity employs a new design of corner transitions, in which a mixture of modes ensuring a low loss level is used. In low-power measurements, the maximum level of resonance amplification has been achieved, which exceeded 35:1 at an operating frequency of 34.272 GHz. The total Q-factor of the ring-shaped cavity amounted to about 21400, and the coefficient of reflection from the inlet, to less than 1%.

  4. A.V. Chirkov, G.G. Denisov, D.A. Lukovnikov, V.I. Malygin, D.I. Sobolev  Minimization of diffraction losses in big gaps of multi-mode waveguides // Int. JournalofInfraredandMillimeterWaves, vol. 26, №7, 2005, pp. 1241-1254.
    A system approach to the development of waveguide corners and quasioptical gaps in oversized low-loss waveguides has been proposed. A mode filter based on a quasioptical gap in the corrugated waveguide 31.75 mm in diameter was tested in experiments at a frequency of 84 GHz and at a low (mW) and a high (200 kW, CW) power level.

  5. T.Idehara, I.Ogawa, S.Mitsudo, Y.Iwata, S.Watanabe, Y.Itakura, K.Ohashi, H.Kobayashi, T.Yokoyama, V.Zapevalov, M.Glyavin, A.Kuftin, O.Malygin and S.Sabchevski Development of a high harmonic gyrotron with an axis-encircling electron beam and a permanent magnet //Int. J. Vacuum, v.77, issue 4, pp.539-546, 2005
    A gyrotron with an axis-encircling electron beam is useful for high frequency operation, because the high beam efficiency is kept even at high harmonic of electron–cyclotron resonance. We have designed and constructed such a gyrotron with a permanent magnet. The gyrotron has already succeeded in operation at the third harmonic and the fourth harmonic resonances. The operation frequencies are 89.3 and 112.7 GHz, respectively. Operation cavity modes are TE311 and TE411. The permanent magnet system consists of many magnet elements made of NdFeB and additional coils for controlling the field intensities in cavity and electron gun regions. The magnetic field at the cavity region can be varied from 0.97 to 1.18 T. At the optimum condition of the magnetic field intensity, the output power at the third harmonic operation is 2.5 kW. The operation is pulsed, the pulse length is 1 ms and the repetition frequency is 1 Hz. The beam energy and current are 40 kV and 1.2 or 1.3 A. Starting current, beam efficiency and emission pattern also have been measured. In this paper, the operation results of the gyrotron and comparison with the computer simulation results are described.

  6. M.S.Gitlin, M.Yu.Glyavin, A.G.Luchinin, and V.V.Zelenogorsky Imaging the Output Radiation Pattern of 110 GHz Gyrotron  with Pulsed Magnetic Field Using Recombination Continuum  Emitted by a Slab of the Cs-Xe DC Discharge // IEEE Transactions on Plasma Science, vol.33, no.2, 2005, pp.380-381
    It has been demonstrated that recombination continuum emitted by a slab of the positive column of the Cs-Xe discharge can be used successfully to image moderate-power pulsed millimeter waves. Using this technique, the output field patterns of a 110 GHz 10 kW gyrotron with a pulsed magnetic field have been imaged.

  7. V.N.Manuilov, T. Idehara, M.Yu.Glyavin, LaAgusu, M.Kamada, T.Kanemaki, Wiehua Jiang  and K. Yatsui Electron Optic system of powerful large orbit gyrotron with Pulse magnetic field // Int. J. IRMM Waves, vol.26, 1, pp.15-28, 2005
    Short-pulse powerful Large Orbit Gyrotron with total electron energy about 400 kV and beam power in the cavity up to 100 MW is now under developing at FIR FU. Suitable for 200 ns pulse duration electron-optic system is analyzed. results of numerical simulation for explosion emission cusp-type electron guns and magnetic field intensity about 8 T are presented. Sensitivity of the guns to small deviations from the nominal operating regime is investigated. Some versions of the gun with different accelerating potential as well as different beam current passing through the cavity (60-300A) are suggested. Current reduction simplifies the problems of mode competition and potential depression in the cavity, but at the same time decrease output power. To diminish current special diaphragms are suggested. results of numerical simulation of collector corresponding to each version of the gun design including power density distributions along its surface are presented. It is shown that beam quality and collector regimes are suitable for LOG operation.

  8. S.Sabchevski, T.Idehara, M.Glyavin, I.Ogawa, S.Mitsudo Modeling and simulation of gyrotrons // Int. J. Vacuum, v.77, issue 4, pp.519-525, 2005
    Modelling and simulation of gyrotrons have two interconnected aspects, namely beam formation in the electronoptical system (EOS) and beam-.eld interaction in the resonant cavity. In this paper we address both problems and outline the physical models and numerical techniques implemented in our problem-oriented package of computer codes. In order to illustrate our approach we present some results of numerical experiments carried out at the FIR FU centre and directed towards analysis and optimization of the existing devices of the Gyrotron FU Series as well as applied to the development of simulation-based design (SBD) of a novel high harmonic gyrotron with the electron beam encircling the axis and a permanent magnet system.
    Electrodynamic characteristics of two-dimensional Bragg structure having planar geometry have been studied experimentally. Good agreement of the measured frequency dependences of the coefficients of transmission and transverse scattering with the results of theoretical analysis in the framework of the geometric-optical approximation, as well as with complete three-dimensional modeling, has been demonstrated. Existence of high-Q modes in the vicinity of the frequency of the precise Bragg resonance has been confirmed experimentally.

  9. V. I. Malygin, V. I. Belousov, A. V. Chirkov, G. G. Denisov, G. I. Kalynova, V. I. Ilin, L. G. Popov  Measurement of Near-Megawatt Millimeter-Wave Beams // NATO Science Series, II, Vol.203 Quasi-Optical Control of Intense Microwavee Transmission (edited by J.L.Hirshfield and M.I.Petelin), 2005, Springer,  Netherlands, p.p. 3-13.

  10. A. Bogdashov, G. Denisov, G. Kalynova   Oversized Transmission Lines for Gyrotron-Based Technological Ovens and Plasma-Chemical Reactors // NATO Science Series, II, Vol.203 Quasi-Optical Control of Intense Microwavee Transmission (edited by J.L.Hirshfield and M.I.Petelin), 2005, SpringerNetherlands,p.p. 15-23.

  11. V. L. Bratman, A.W. Cross, G. G. Denisov, A. D. R. Phelps, S.V. Samsonov Microwave Devices with Helically Corrugated Waveguides // NATO Science Series, II, Vol.203 Quasi-Optical Control of Intense Microwavee Transmission (edited by J.L.Hirshfield and M.I.Petelin), 2005, Springer,  Netherlands, p.p. 105-114.

  12. J. L. Hirshfield, A. A. Bogdashov, A. V. Chirkov, G. G. Denisov, A. S. Fix, S. V. Kuzikov, M. A. LaPointe, A. G. Litvak, D. A. Lukovnikov, V. I. Malygin, O. A. Nezhevenko, M. I. Petelin,, Yu.V. Rodin, G.V. Serdobintsev, M.Y. Shmelyov, V.P. Yakovlev Transmission Line Components for a Future Millimeter-Wave High-Gradient Linear Accelerator // NATO Science Series, II, Vol.203 Quasi-Optical Control of Intense Microwavee Transmission (edited by J.L.Hirshfield and M.I.Petelin), 2005, Springer,  Netherlands, p.p. 147-163.