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Plasma electronics laboratory
General Physics Inst., 38 Vavilova str., 119991 Moscow, Russia
Tel: (095)135.6387. Fax: (095)135.8011
Head: professor Pavel S. Strelkov
e-mail: strelkov@fpl.gpi.ru
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Scientific directions:
- plasma relativistic microwave oscillator
- high-power microwave pulse shortening
- plasma relativistic microwave amplifier
Accelerator “TEREK-2”
500 keV, 10 kA, 30 ns
Head: Dr. Denis K. Ulyanov e-mail: dox@fpl.gpi.ru
Accelerator “TEREK-3”
700 keV, 5 kA, 1 mcs
Head: Dr. Oleg T. Loza e-mail: loza@fpl.gpi.ru
Accelerator “TEREK-3W”
700 keV, 30 kA, 100 ns
Head: A.V.Ponomarev e-mail: ponomarev@fpl.gpi.ru
High-power microwave sources: features & advantages of “plasma” and “relativistic”.
Relativistic velocity of the electron beam excites waves in plasma with:
… phase velocity close to light speed. This alleviates extraction of microwaves from plasma into vacuum in wide frequency range.
… group velocity close to light speed. This provides low Q-factor of resonators and, hence, permits high power of microwaves.
Plasma
- …compensates electron beam space charge and (unlike vacuum electronics) permits to utilize electron currents exceeding the vacuum limiting current;
- …allows to tune microwave frequency
over a wide range by means of plasma density varying.
Ref.:
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M.V.Kuzelev, O.T.Loza, A.A.Rukhadze, P.S.Strelkov, A.G.Shkvarunets. "Plasma Relativistic Microwave Electronics". Plasma Physics Reports, Vol. 27, No. 8, 2001, pp. 669-691.
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Cherenkov plasma maser (CPM)
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Research is carried out since 1982. During this time:
- · Microwave power 500 MW with the efficiency 10%; registered using the microwave detector and the calorimeter.
Ref: M.Birau, et al. Proc. 23-th Int. Conf. On Phenomena in ionized gases. (ICPIG'97), Toulouse, July 17-22, 1997, vol. III, pp.46-47.
- Microwave frequency tuning: plasma may be reset during ~ 100 mcs
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Figure 2. Narrow-band regime: spectrum of the CPM with different plasma concentrations at 50 MW power level.
- Microwave spectrum width of a single pulse may be broad
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Figure 4. Broad-band regime: microwave spectrum of a 50-ns pulse. registered using the spectrometer.
- Microwave power and the pulse duration remain almost the same throughout the frequency range
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Figure 3. Waveforms of microwave pulse power in different frequency bands. Obtained using the microwave detector and the spectrometer.
- The theory has been developed, numerical model and simulation codes were designed, calculations were conducted
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Figure 5. Microwave radiation frequency f vs plasma concentration np: theoretical predictions are in good accordance with experimental results. Microwave power ~
50 MW. Vertical lines represent measured microwave spectra.
Ref.: |
P. S. Strelkov and D. K. Ul'yanov. "Emission Spectra of a Cherenkov Plasma Relativistic Maser Plasma Physics Reports", Vol. 26, No. 4, 2000, pp. 303-307.
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Conferences:
15th International Conference on High-Power Particle Beams (Beams'2004), St. Petersburg, July 18-23, 2004
O. T. Loza. "On the mechanism of HPM pulse shortening in oscillators driven by relativistic electron beams"
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A. V. Ponomarev, P. S. Strelkov. "Experimental Investigations of Cherenkov Plasma Amplifier"
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I. L. Bogdankevich, P. S. Strelkov, V. P. Tarakanov, D. K. Ulyanov. "The influences of reflected electrons on the REB potential and on the energy distribution function of the REB electrons"
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Papers:
A. G. Shkvarunets. "A broadband microwave calorimeter of large cross section". Instruments and Experimental Techniques, vol. 39, No. 4, 1996, pp. 535-538.
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O.T.Loza, A.V.Ponomarev, P.S.Strelkov, et al. "Source of an annular controlled-radius plasma for a plasma relativistic microwave oscillator". Plasma Physics Reports, vol.23, No.3, pp.201-208, 1997.
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I. L. Bogdankevich, P. S. Strelkov, V. P. Tarakanov, et al. "A calorimetric spectrometer measuring single pulses of relativistic microwave generators". Instruments and Experimental Techniques, vol. 43, No. 1, 2000, pp. 82-87.
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P. S. Strelkov and D. K. Ul'yanov. "Emission Spectra of a Cherenkov Plasma Relativistic Maser" Plasma Physics Reports, Vol. 26, No. 4, 2000, pp. 303-307.
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I. L. Bogdankevich, I. E. Ivanov, O. T. Loza, et al. "Fine Structure of the Emission Spectra of a Relativistic Cherenkov Plasma Maser". Plasma Physics Reports, Vol. 28, No. 8, 2002, pp. 690-698.
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M.V.Kuzelev, O.T.Loza, A.A.Rukhadze, P.S.Strelkov, A.G.Shkvarunets. "Plasma Relativistic Microwave Electronics". Plasma Physics Reports, Vol. 27, No. 8, 2001, pp. 669-691.
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A. V. Ponomarev, P. S. Strelkov, and A. G. Shkvarunets. Tunable Plasma Relativistic Microwave Amplifier. Plasma Physics Reports, vol. 26, No. 7, 2000, pp. 592–597.
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