Search Results - "Bratman, V. L"

Undulator radiation of premodulated and nonmodulated electron bunches in the negative mass instability regime by Bratman, V. L., Lurie, Yu

“…The use of both spatial premodulation and negative mass instability is promising for the energy enhancement and spectrum narrowing of the undulator radiation…”
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Energy enhancement and spectrum narrowing in terahertz electron sources due to negative mass instability by Lurie, Yu, Bratman, V. L., Savilov, A. V.

“…Simulations of coherent spontaneous undulator radiation in a waveguide demonstrate that the use of negative mass instability (NMI) for retaining longitudinal…”
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Compression of frequency-modulated pulses using helically corrugated waveguides and its potential for generating multigigawatt rf radiation by SAMSONOV, S. V, PHELPS, A. D. R, BRATMAN, V. L, BURT, G, DENISOV, G. G, CROSS, A. W, RONALD, K, HE, W, YIN, H

“…A new method to generate ultrahigh-power microwave pulses compatible with mildly relativistic electron sources is proposed. This method involves a novel…”
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Helical undulator based on partial redistribution of uniform magnetic field by Balal, N., Bandurkin, I. V., Bratman, V. L., Fedotov, A. E.

“…A new type of helical undulator based on redistribution of magnetic field of a solenoid by ferromagnetic helix has been proposed and studied both in theory and…”
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Large-orbit gyrotron operation in the terahertz frequency range by Bratman, V L, Kalynov, Yu K, Manuilov, V N

“…Coherent terahertz high-harmonic radiation has been obtained in a gyrotron with an axis-encircling electron beam. An electron-optical system with a cusp gun…”
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Numerical Study of a Low-Voltage Gyrotron ("Gyrotrino") for DNP/NMR Spectroscopy by Bratman, V. L., Fedotov, A. E., Kalynov, Yu K., Makhalov, P. B., Osharin, I. V.

“…Feasibility of a gyrotron for the dynamic nuclear polarization (DNP) purpose, integrated with nuclear magnetic resonance (NMR) spectrometer inside a single…”
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Terahertz Orotrons and Oromultipliers by Bratman, V. L., Dumesh, B. S., Fedotov, A. E., Makhalov, P. B., Movshevich, B. Z., Rusin, F. S.

“…The capabilities of two types of terahertz sources based on stimulated Smith-Purcell radiation of electrons in open cavities are discussed. A series of…”
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Electron-Optical System of the Gyrotron Designed for Operation in the DNP-NMR Spectrometer Cryomagnet (“Gyrotrino”) by Bratman, V.L., Fedotov, A.E., Kalynov, Yu. K., Manuilov, V.N.

“…The formation and utilization of a helical electron beam are studied theoretically for a gyrotron with a very low operating voltage in a range 1.5–1.8 kV. Such…”
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High-Harmonic Gyrotrons with Axis-Encircling Electron Beams at IAP RAS by Bandurkin, I. V., Bratman, V. L., Kalynov, Y. K., Manuilov, V.N., Osharin, I.V., Savilov, A.V.

“…The Institute of Applied Physics of the Russian Academy of Sciences has for many years been developing sub-terahertz and terahertz large-orbit gyrotrons that…”
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Gyrotron Development for High Power THz Technologies at IAP RAS by Bratman, V. L., Bogdashov, A. A., Denisov, G. G., Glyavin, M. Yu, Kalynov, Yu K., Luchinin, A. G., Manuilov, V. N., Zapevalov, V. E., Zavolsky, N. A., Zorin, V. G.

“…The review summarizes recent experimental results in the field of THz gyrotrons developed for various applications. A CW gyrotron with the operation frequency…”
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THz Gyrotron and BWO Designed for Operation in DNP-NMR Spectrometer Magnet by Bratman, V. L., Fedotov, A. E., Kalynov, Yu. K., Makhalov, P. B., Samoson, A.

“…Dynamic nuclear polarization (DNP) in high-field nuclear magnetic resonance (NMR) spectroscopy requires medium-power terahertz radiation, which nowadays can be…”
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Terahertz Gyrotrons at IAP RAS: Status and New Designs by Bratman, V. L., Glyavin, M. Yu, Kalynov, Yu. K., Litvak, A. G., Luchinin, A. G., Savilov, A. V., Zapevalov, V. E.

“…Powerful gyrotrons with radiation frequencies in the range 0.33–0.65 THz were demonstrated at the IAP as early as in the 1970–1980s. This trend has recently…”
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Design of mm-wave slow-wave devices with sheet and hollow electron beams by Fedotov, A.E., Bratman, V.L., Makhalov, P.B., Manuilov, V.N.

“…The frequency increase of the slow-wave electron devices is accompanied by inevitable increase of the electron current density and ohmic losses which strongly…”
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Prospective THz Gyrotrons for High-Field Magneto-Resonance Spectroscopy by Bratman, V.L., Fedotov, A.E., Kalynov, Yu.K., Manuilov, V.N.

“…A high-harmonic Large Orbit Gyrotron and a low-voltage gyrotrino placed inside a spectrometer cryomagnet enable greatly simplify terahertz systems for…”
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A Long Cavity With Reduced Diffraction Q for Subterahertz and Terahertz Gyrotrons by Ben Moshe, Roey, Bratman, V. L., Einat, Moshe

“…A promising modification of the gyrotron cavity with a little bit wider and fairly long insertion (drift section) into the regular cylindrical part has been…”
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Possibility of Effective High-Frequency Generation in Low-Voltage Gyrotrons at the Second Cyclotron Harmonic by Ben Moshe, R., Bratman, V. L., Zavolsky, N. A., Kalynov, Yu. K., Fedotov, A. E., Einat, M.

“…Despite the high theoretical values of the electron efficiency of the subterahertz gyrotrons working at cyclotron harmonics at low operating voltages, the…”
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THz radiation of stabilized dense electron bunches by Savilov, A.V., Bandurkin, I.V., Kurakin, I.S., Oparina, Yu.S., Bratman, V.L., Balal, N., Lurie, Yu

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Progress in the development of low-voltage gyrotron for integration with NMR spectrometer by Bratman, V.L., Fedotov, A.E., Kalynov, Yu. K., Manuilov, V.N., Osharin, I.V.

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Non-relativistic hollow electron beam formation for mm-wave BWO by Bratman, V.L., Fedotov, A.E., Makhalov, P.B., Manuilov, V.N.

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Coherent spontaneous THz undulator radiation from dense electron bunches formed in laser-driven photo-injectors by Bratman, V.L., Balal, N., Bandurkin, I.V., Friedman, A., Lurie, Yu, Savilov, A.V.

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