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  Subjects -> ELECTRONICS (Total: 158 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 2)
Advances in Electronics     Open Access   (Followers: 6)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 6)
Advances in Microelectronic Engineering     Open Access   (Followers: 7)
Advances in Power Electronics     Open Access   (Followers: 11)
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 110)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 13)
Annals of Telecommunications     Hybrid Journal   (Followers: 5)
APL : Organic Electronics and Photonics     Hybrid Journal   (Followers: 2)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 6)
Archives of Electrical Engineering     Open Access   (Followers: 8)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 4)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 16)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 14)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 23)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 5)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 6)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 1)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access  
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 14)
China Communications     Full-text available via subscription   (Followers: 5)
Circuits and Systems     Open Access   (Followers: 9)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 42)
Edu Elektrika Journal     Open Access  
Electronic Design     Partially Free   (Followers: 30)
Electronic Markets     Hybrid Journal   (Followers: 5)
Electronic Materials Letters     Hybrid Journal   (Followers: 1)
Electronics     Open Access   (Followers: 12)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 5)
Electronics Letters     Hybrid Journal   (Followers: 18)
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 28)
Energy Harvesting and Systems : Materials, Mechanisms, Circuits and Storage     Hybrid Journal   (Followers: 3)
EPJ Quantum Technology     Open Access  
EURASIP Journal on Embedded Systems     Open Access   (Followers: 9)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal  
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 19)
Giroskopiya i Navigatsiya     Open Access  
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 2)
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 28)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 22)
IEEE Consumer Electronics Magazine     Full-text available via subscription   (Followers: 22)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 18)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 4)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 21)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 21)
IEEE Transactions on Audio, Speech, and Language Processing     Hybrid Journal   (Followers: 12)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 38)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 19)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 7)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 14)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 36)
IEEE Transactions on Signal and Information Processing over Networks     Full-text available via subscription   (Followers: 3)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 7)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 6)
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 5)
IET Power Electronics     Hybrid Journal   (Followers: 17)
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 11)
IETE Journal of Education     Open Access   (Followers: 1)
IETE Journal of Research     Open Access   (Followers: 7)
IETE Technical Review     Open Access   (Followers: 4)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 15)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 3)
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription  
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 5)
International Journal of Advanced Electronics and Communication Systems     Open Access   (Followers: 5)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 14)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 3)
International Journal of Aerospace Innovations     Full-text available via subscription   (Followers: 12)
International Journal of Antennas and Propagation     Open Access   (Followers: 5)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 1)
International Journal of Biomedical Nanoscience and Nanotechnology     Hybrid Journal   (Followers: 5)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 4)
International Journal of Computer & Electronics Research     Full-text available via subscription   (Followers: 1)
International Journal of Control     Hybrid Journal   (Followers: 13)
International Journal of Electronics     Hybrid Journal   (Followers: 1)
International Journal of Electronics & Data Communication     Open Access   (Followers: 3)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 4)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal  
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 4)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 1)
International Journal of Nano Devices, Sensors and Systems     Open Access   (Followers: 5)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling:Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 2)
International Journal of Power Electronics     Hybrid Journal   (Followers: 11)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 3)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 4)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 2)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 2)
International Journal on Communication     Full-text available via subscription   (Followers: 11)
International Journal on Electrical and Power Engineering     Full-text available via subscription   (Followers: 5)
International Transaction of Electrical and Computer Engineers System     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 3)
Journal of Advanced Dielectrics     Open Access  
Journal of Artificial Intelligence     Open Access   (Followers: 6)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 1)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription  
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 8)
Journal of Electrical Bioimpedance     Full-text available via subscription   (Followers: 1)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 3)
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 4)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 3)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 1)
Journal of Electronics (China)     Hybrid Journal   (Followers: 3)
Journal of Field Robotics     Hybrid Journal   (Followers: 1)
Journal of Guidance, Control, and Dynamics     Full-text available via subscription   (Followers: 94)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 2)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 5)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 3)
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 5)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access  
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 6)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 6)
Journal of Semiconductors     Full-text available via subscription   (Followers: 2)
Journal of Sensors     Open Access   (Followers: 10)
Journal of Signal and Information Processing     Open Access   (Followers: 6)
Jurnal Infotel     Open Access  
Jurnal Rekayasa Elektrika     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 9)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 5)
Metrology and Measurement Systems     Open Access   (Followers: 3)
Microelectronics and Solid State Electronics     Open Access   (Followers: 11)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 26)
Nanotechnology, Science and Applications     Open Access   (Followers: 1)
Networks: an International Journal     Hybrid Journal   (Followers: 4)
Open Journal of Antennas and Propagation     Open Access  
Optical Communications and Networking, IEEE/OSA Journal of     Hybrid Journal   (Followers: 6)
Paladyn, Journal of Behavioral Robotics     Open Access  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Pulse     Full-text available via subscription   (Followers: 3)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Patents on Electrical & Electronic Engineering     Full-text available via subscription   (Followers: 2)
Recent Patents on Telecommunications     Full-text available via subscription   (Followers: 1)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 1)
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 15)
Semiconductors and Semimetals     Full-text available via subscription  
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 1)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 4)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 33)
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 7)
Solid-State Electronics     Hybrid Journal   (Followers: 5)
Superconductor Science and Technology     Hybrid Journal  
Synthesis Lectures on Power Electronics     Full-text available via subscription  
Technical Report Electronics and Computer Engineering     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 3)
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 3)
Visión Electrónica : algo más que un estado sólido     Open Access  
Wireless and Mobile Technologies     Open Access  
Wireless Power Transfer     Full-text available via subscription  
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 8)
Електротехніка і Електромеханіка     Open Access  

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Journal Cover Radiophysics and Quantum Electronics
  [SJR: 0.236]   [H-I: 9]   [2 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1573-9120 - ISSN (Online) 0033-8443
   Published by Springer-Verlag Homepage  [2281 journals]
  • Low-Loss Fiber-Optic Polarizers
    • Abstract: We calculate the characteristics (the extinction and loss coefficients) of a fiber-optic polarizer with a metal film and a dielectric buffer layer. It is shown that using the metals, in which the real part of the complex refractive index is much smaller than unity (e.g., silver, gold, and copper), in such polarizers makes it possible to significantly reduce the loss for the fundamental transmitted TE0 mode compared with the aluminum-film polarizers. In this case, a sufficiently high extinction coefficient is preserved.
      PubDate: 2016-04-07
  • New Radiation Input/Output Systems for Millimeter-Wave Gyrotron
           Traveling-Wave Tubes
    • Abstract: We consider in detail the method allowing one to input and output the microwave radiation produced by an elecrovacuum amplifier through the same barrier window, which was proposed earlier, in the context of its application in a traveling-wave tube based on a waveguide with a helically corrugated surface. Special attention is given to the splitter of differently polarized radiation, and the results of studying this splitter at wavelengths of about 6 and 1 mm theoretically and experimentally are presented.
      PubDate: 2016-04-06
  • Peculiarities of Excitation of Large-Scale Plasma Density Irregularities
           During Modification of the Ionospheric F 2 Region by High-Power HF Radio
    • Abstract: We present the experimental results concerning the features of large-scale artificial plasma-density irregularities excited in the ionospheric F2 region by high-power HF radio waves. The experiments were performed in recent years using the SURA heating facility. It is shown that at the altitude of the pump-wave reflection, these irregularities are most efficiently generated in the magnetic zenith region. The effect of enhancement of the large-scale irregularity generation at the edge of the pump-wave beam is revealed. The results of studying large-scale irregularities recorded at the altitudes of the topside ionosphere are presented. Experimental results concerning the features of the internal gravity waves generated at the ionospheric altitudes during periodic heating of the ionospheric plasma by high-power HF radio waves are summarized and their possible influence on generation of artificial ionospheric irregularities at a long distance from the heater is discussed.
      PubDate: 2016-04-05
  • Analysis of Synchronous Dynamics of the Coupled Virtual Cathode
           Oscillators by Calculating the Spectrum of Lyapunov Exponents
    • Abstract: We describe an approach for analyzing the generalized synchronization of the unidirectionally coupled virtual cathode oscillators on the within the framework of the large-particle method. The generalized synchronization is diagnosed by the auxiliary-system method to confirm the results of the study.
      PubDate: 2016-04-05
  • Microwave Undulators and Electron Generators for New-Generation
           Free-Electron Lasers
    • Abstract: We discuss possible applications of relativistic pulsed microwave electronic devices in physics and engineering of modern free-electron lasers. In particular, the possibilities of using high-power millimeter-wave radiation pulses for electron pitching in the operating space of the laser (in a microwave undulator), as well as for cooling and focusing of electron bunches, are considered.
      PubDate: 2016-04-05
  • Evolution of Acoustic Waves in Homogeneous Media with Different-Modulus
           Nonlinearity and Relaxation
    • Abstract: We present the results of analytical and numerical studies of propagation and evolution of the initially harmonic acoustic waves in homogeneous media with different-modulus nonlinearity and relaxation. The solutions for the profiles of nonlinear waves and their spectral characteristics are obtained.
      PubDate: 2016-04-05
  • Electrodynamic Analysis and Synthesis of Shielded Coupled Microstrip Lines
    • Abstract: We develop the mathematical model of shielded coupled microstrip lines on the basis of a numericalanalytical method for calculating eigenwaves of strip structures, which was earlier proposed by the author. This model allows one to solve the problems of both analysis and synthesis of such lines with high speed and accuracy. The dependence of the main electrodynamic parameters of such lines on the shield sizes is studied. The possibility to equalize the slowing factors of the inphase and antiphase waves is confirmed in a wide range of variations in the physical and geometrical parameters of the lines. The results of calculating the line sizes, which are determined on the basis of solving synthesis problems under the condition of equality of the slowing factors, are presented.
      PubDate: 2016-04-05
  • Using the Talbot Effect for Summation of Microwave Signals in the
           Millimeter-Wavelength Band
    • Abstract: We consider the problem of summing the power produced by several coherent sources of microwaves and propose to use the Talbot effect in an oversized rectangular waveguide to solve it. The operating frequency of the summator is 94.4 GHz. The calculated coefficient of summation of individual signals is equal to 2.8 dB in the 800 MHz frequency range with allowance for the ohmic loss. Computer simulation of the summator has been performed, and its characteristics have been studied at a low power level.
      PubDate: 2016-04-05
  • Peculiarities of the Mode Spectrum in Free-Electron Masers Based on
           Oversized Bragg Resonators with a Corrugation Phase Step
    • Abstract: We study the operating mode splitting caused by interaction of the neighboring Bragg scattering zones in an oversized Bragg resonator with a corrugation phase step, which is operated at the coupled forward and backward waveguide modes with different transverse structures. This effect is described within the framework of the coupled-wave approach using an advanced four-wave model. It is shown that this effect deteriorates the selective properties of the resonator and, finally, restricts the output power and reduces stability of the narrow-band operating regime in the free-electron masers (FEMs) based on such resonators. The results of the theoretical analysis were corroborated by 3D simulations and “cold” electrodynamic tests. Experimental studies of 30-GHz FEMs with the Bragg resonators having different corrugation depths demonstrated the onset of both narrow-band single-mode and multifrequency multimode oscillation regimes in such resonators. The possibility of power enhancement by using passive compression of the FEM output pulse in a double-frequency oscillation regime is discussed.
      PubDate: 2016-04-05
  • High-Power Ka-Band Transmission Line with a Frequency Bandwidth of 1 GHZ
    • Abstract: We present experimental results on a high-power transmission line from the broadband pulsed Ka-band gyro-TWT to the phased antenna array. The transmission line is designed to operate in a pulse-periodic regime with a pulse width of up to 250 μs, a duty factor of 8, and an average output power of up to 15 kW. Amplitude–frequency and phase–frequency characteristics of the transmission line were measured at a low power level. It is shown that the nonlinearity of the phase–frequency characteristic does not exceed ±10° in the 34 ± 0.5 GHz frequency band.
      PubDate: 2016-04-05
  • Field Structure of a Quasisoliton Approaching the Critical Point
    • Abstract: Within the framework of an approximate approach based on the representation of the Gardnerequation solitons as compound structures (different-polarity kinks), the non-quasistationary evolution of such solitary waves, which is stipulated by the variable quadratic-nonlinearity parameter α. The structure of the composite soliton is studied in cases that are critical for the quasistationary description where the predicted increase in the solitary-wave scales becomes unbounded on finite spatio-temporal intervals. The dependence of the spatial scales of the quasisoliton-field distribution on the quadratic-nonlinearity coefficient near the critical point for the power-law time dependence α(t) is studied in detail. The obtained solution is compared with the results of direct numerical simulation of the Gardner equation with variable coefficients.
      PubDate: 2016-04-05
  • Gyrotron Frequency Stabilization by a Weak Reflected Wave
    • Abstract: The possibility of reducing the radiation frequency fluctuations by a factor of 3–5 using a nonresonant or highly resonant weakly reflecting load for the gyrotrons employed in controlled-fusion facilities is shown. The ranges of system parameters where the frequency stabilization is most effective were identified both analytically and numerically.
      PubDate: 2016-03-30
  • Peculiarities of Optimizing the Subsystems of a Continuous-Wave Gyrotron
           with a Generation Frequency of 0.26 THz at the Fundamental Cyclotron
    • Abstract: We present the results of developing the main units of a gyrotron operated in the continuous-wave regime with a generation frequency of 0.26 THz. To improve selection of the operating mode in a oversized electrodynamic system, the gyrotron works at the fundamental cyclotron harmonic, which anticipates the use of a cryomagnet with a maximum magnetic field of 10 T, which does not require filling with liquid helium. The results of optimizing the electron-optical system, the cavity, and the quasi-optical converter of the output radiation are presented, and the control system, which is developed for the gyrotron setup, is described.
      PubDate: 2016-03-30
  • Possibilities for Continuous Frequency Tuning in Terahertz Gyrotrons with
           Nontunable Electrodynamic Systems
    • Abstract: Large ohmic losses in the cavities of terahertz gyrotrons may lead to the overlapping of the axial mode spectra. In a number of gyrotron experiments, this effect has been used to provide a fairly broadband frequency tuning by changing appropriately the operating magnetic field and/or accelerating voltage of the gyrotron. Similar to the systems with nonfixed axial structure of the RF electromagnetic field and low diffraction quality, which are due to weak reflections of the operating wave from the collector end of the electrodynamic system, this changing leads to a monotonic change in the axial index of the operating wave and transition from the gyrotron regime to the gyro-BWO regime. According to a theoretical comparison of these two methods performed on the basis of generalization of self-consistent gyrotron equations with allowance for variations in the axial electron momenta, low-reflection systems can provide a higher efficiency and monotonicity of the frequency tuning.
      PubDate: 2016-03-28
  • Relief Creation on Molybdenum Plates in Discharges Initiated by Gyrotron
           Radiation in Metal–Dielectric Powder Mixtures
    • Abstract: We show the possibility of creating a metal microcrystalline relief (micro- and nanosized) on molybdenum plates in a plasma gas-phase discharge initiated by gyrotron radiation in molybdenum–dielectric powder mixtures.
      PubDate: 2016-03-28
  • Frequency Locking and Stabilization Regimes in High-Power Gyrotrons with
           Low-Q Resonators
    • Abstract: Using a nonstationary self-consistent model, we analyze the frequency locking and stabilization regimes arising in gyrotrons with low-Q resonators under the action of an external signal or when reflections from a remote nonresonant load are introduced. In the simulations, we used the parameters of high-power gyrotrons designed for controlled thermonuclear fusion with optimized resonator profile. This approach makes it possible to determine output characteristics of the gyrotrons operated in considered regimes taking into account the effect of the incident wave (external or reflected) on the longitudinal field structure with greater precision compared with the earlier results based on the fixed RF-field structure approximation, while qualitative results of the two approaches coincide. Analysis of the effect of reflections from a remote load has demonstrated a substantial dependence of the efficiency of the gyrotron frequency stabilization on the ratio between the characteristic time scale of the synchronism detuning fluctuations and the signal delay time.
      PubDate: 2016-03-28
  • Experimental Study of a Gyrotron with a Sectioned Klystron-Type Cavity
           Operated at Higher Cyclotron Harmonics
    • Abstract: We are planning to use extended cavities in order to excite gyrotrons with large electron orbits, which are operated at higher cyclotron harmonics in the terahertz frequency range. This is determined by both the weakness of the electron-wave interaction, and relatively low operating currents. Since the diffraction Q-factor of such cavities is high, a significant part of the highfrequency power produced by the electron beam is lost due to the ohmic loss in the cavity walls. As a way to solve this problem, we proposed a sectioned klystron-type cavity, where an extended length of the electron-wave interaction region can be combined with a relatively low diffraction Q-factor of the system. This work presents the results of the first experiment on a gyrotron with a sectioned cavity, where selective excitation of higher (second and third) cyclotron harmonics was observed in the terahertz frequency range (0.55 and 0.74 THz).
      PubDate: 2016-03-28
  • Automated Microwave Complex on the Basis of a Continuous-Wave Gyrotron
           with an Operating Frequency of 263 GHz and an Output Power of 1 kW
    • Abstract: We study experimentally the automated microwave complex for microwave spectroscopy and diagnostics of various media, which was developed at the Institute of Applied Physics of the Russian Academy of Sciences in cooperation with GYCOM Ltd. on the basis of a gyrotron with a frequency of 263 GHz and operated at the first gyrofrequency harmonic. In the process of the experiments, a controllable output power of 0.1–1 kW was achieved with an efficiency of up to 17% in the continuous-wave generation regime. The measured radiation spectrum with a relative width of about 10 −6 and the frequency values measured at various parameters of the device are presented. The results of measuring the parameters of the wave beam, which was formed by a built-in quasioptical converter, as well as the data obtained by measuring the heat loss in the cavity and the vacuum output window are analyzed.
      PubDate: 2016-03-28
  • Using High-Power Gyrotrons in the T-10 Tokamak
    • Abstract: In this work, we briefly review the T-10 tokamak experiments on the interaction of microwaves with the plasma in the electron-cyclotron resonance frequency range. The basic results on the electron-cyclotron heating and the noninductive current generation in the plasma at both the first and second cyclotron harmonics are presented along with the typical values of the heating and current-generation efficiencies. The possibility of using the local contribution of the high-frequency power to control the sawtooth-oscillation instability and the amplitudes of the neoclassical tearing modes is demonstrated. Using the injection of the high-frequency waves for the working-gas preionization, allows one to optimize both the breakdown phase in the absence of a rotational electric field and the discharge-current increase stage.
      PubDate: 2016-03-28
  • Generation of a Periodic Series of High-Power Ultra-Short Pulses in a
           Gyro-TWT with a Bleachable Cyclotron Absorber in the Feedback Circuit
    • Abstract: We demonstrate the possibility of forming a periodic series of ultra-short pulses, which has a peak power exceeding significantly the radiation power in stationary regimes, in a gyroresonance traveling-wave tube (gyro-TWT) with a bleachable cyclotron absorber in the feedback circuit. The mechanism of pulsed generation is similar to the method of passive mode locking, which is used widely in laser physics.
      PubDate: 2016-01-01
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