High power pico-second pulse generation

Researches of Yalandin et al...

Electron source and acceleration regime of a picosecond electron beam in a gas-filled diode with inhomogeneous field
Technical Physics Letters
Volume 34, Number 2 / February, 2008
Pages 169-173
G. A. Mesyats1, 2 , V. G. Shpak1, 2, S. A. Shunailov1, 2 and M. I. Yalandin1, 2
(1)
Lebedev Institute of Physics, Russian Academy of Sciences, Moscow, 117924, Russia
(2)
Institute of Electrophysics, Ural Division, Russian Academy of Sciences, Yekaterinburg, 620219, Russia
Received: 10 April 2007 Published online: 2 April 2008
Abstract It is experimentally demonstrated that, upon the application of a subnanosecond high-voltage pulse to the gap of a diode filled with air at atmospheric pressure, a bunch of runaway electrons is formed in a sharply inhomogeneous electric field near the cathode. The bunch duration does not exceed 50 ps, which is shorter than the electron flight time through the interelectrode gap in the continuous acceleration regime. This duration remained unchanged when the gap width was varied between 6 and 26 mm. The electron energy in the picosecond electron beam, as determined from the time-of-flight measurements in the drift channel behind the anode foil of the diode, agree with the results of numerical calculations of the electron acceleration dynamics in the vacuum diode approximation.
PACS numbers 51.50.+v - 52.59.Tb - 52.80.Tn
Original Russian Text © G.A. Mesyats, V.G. Shpak, S.A. Shunailov, M.I. Yalandin, 2008, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2008, Vol. 34, No. 4, pp. 71–80.


High-power picosecond electronics
Gennadii A Mesyats et al 2005 Phys.-Usp. 48 211-229
Gennadii A Mesyats 1 and Mikhail I Yalandin 21 P.N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow, Russian Federation2 Institute of Electrophysics, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation
Abstract. This paper reviews current research in high-power picosecond electronics, a branch of experimental engineering physics, whose dynamic development critically depends on national priority research projects. The aim of the review is basically to show progress in the study of picosecond processes involved in the accumulation, commutation, and transformation of high-density electric power. Examples are presented demonstrating what the latest built high-voltage picosecond facilities will potentially fundamentally contribute to developments in generating unique-property high-power electron beams and electromagnetic radiation pulses.

Subnanosecond 1-GW pulsed 38-GHz radiation source
Technical Physics Letters Volume 30, Number 2 / February, 2004
Pages 117-119
S. D. Korovin1, 2, G. A. Mesyats1, 2, V. V. Rostov1, 2 , M. R. Ul’maskulov1, 2, K. A. Sharypov1, 2, V. G. Shpak1, 2, S. A. Shunailov1, 2 and M. I. Yalandin1, 2
(1)
Institute of Electrophysics, Ural Division, Russian Academy of Sciences, Yekaterinburg, Russia
(2)
Institute of High-Current Electronics, Siberian Division, Russian Academy of Sciences, Tomsk, Russia
Received: 14 July 2003
Abstract The regime of excitation of subnanosecond high-power microwave pulses has been studied in a Cherenkov device with an extended periodic slow-wave structure, using an electron beam from a compact pulsed high-current electron accelerator (290 keV, 2.3 kA, 1 ns). Conditions are established for which the power conversion coefficient can reach up to 1.5 at an output pulse power of 1.2 GW and a pulse duration of 200 ps.
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Translated from Pis’ma v Zhurnal Tekhnichesko Fiziki, Vol. 30, No. 3, 2004, pp. 68–74.

Compact High-Power Subnanosecond Repetitive-Pulse Generators(Review)
M. I. Yalandin and V. G. Shpak
Institute of Electrophysics, Ural Division, Russian Academy of Sciences, ul. Amundsena 106, Yekaterinburg, 620016 Russia
Received November 30, 2000
Abstract—This review presents the results of investigations, design work, and tests of generators of subnano-second pulses with amplitudes exceeding 100 kV. These generators were developed at the Institute of Electro-physics on the basis of compact nanosecond repetitive-pulse RADAN generators. Relatively long pulses (2–5 ns) were transformed into shorter ones (down to 150–200 ps) with the use of systems based on high-pressure sharp-ening and cutting gas spark gaps. This ensured stable operating modes for the generators at repetition frequen-cies of up to 100 Hz. Such spark gaps were utilized in systems of additional energy compression for enhancing the peak power of output subnanosecond pulses, as well as in devices producing high-power bipolar pulses. Some applications of short (<1 ns) powerful voltage pulses are considered.


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