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A. G. Reutova,S. A. Shunaylov,M. I. Yalandin,M. B. Bochkarev,K. A. Bereznoy,A. S. Nasibov 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.61
In our previous research laser generation peculiarities in different semiconductor A2B6 materials (CdS, ZnSe, ZnCdS) under the action of high-current picosecond electron beams were investigated. Laser radiation is observed in the specified materials due to electric field. Radiation appears with the application of a high-voltage pulses (voltage to 200 kV, duration ~150 – 300 ps) to the sample and has a threshold character. The generation areas are shown to be localized near the sample surface,and radiation duration is from 60 to 100 ps. The radiation power in the case of electric-field-pulse excitation could exceed 10 kW.
S. A. Shunailov,A. G. Reutova,V. G. Shpak,M. I. Yalandin,G. A. Mesyats 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.61
This work aims to determine the energy spectrum bands for a picosecond runaway electron beam (REB) formed and accelerated in an atmospheric gap with a nonuniform E-field. In experiments in which a current/charge was registered after a runaway electron beam had passed absorbing filters made with foils within a four-order range, the absence of any electrons possessing anomalously high energies was demonstrated. Achievable energies did not exceed the values corresponding to the mode of free electrons acceleration in a vacuum by dynamic-growing E-field and were strictly limited by using the cathode voltage. The method of smooth variation of the accelerating voltage amplitude confirmed that the E-field strength required for thermal electrons to transit into the continuous acceleration region in air corresponds to widely-use classical criteria.
I. V. Zotova,N. S. Ginzburg,A. S. Sergeev,M. I. Yalandin,A. G. Reutova,M. R. Ulmaskulov,A. K. Sharypov,S. A. Shunailov 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.61
The first experiments on observation of amplification of ultrashort microwave superradiance (SR) pulses under propagating along quasistationary electron beams were performed. For this purpose experimental set-up based on two high current accelerators RADAN synchronized with accuracy 100-300 ps was build up. The first accelerator was used to drive the 37 GHz generator of superradiance pulses with duration ~300 ps based on relativistic BWO. The second accelerator with current up to 1.2 kA and electron energy ~300 keV drives the amplification section in the form of dielectric loaded waveguide. According to theoretical analysis amplification of electromagnetic pulses (minimum in 4 times on power) was accompanied by significant shortening of SR pulse duration fewer than 100 ps.