Parameters of runaway electron beam generated during excitation by nanosecond voltage pulses in short gaps filled with nitrogen

5th International Congress on Energy Fluxes and Radiation Effects 2016

Sorokin, D.A.^1,2 ; Tarasenko, V.F.^1,2 ; Lomaev, M.I.^1,2

Institute of High Current Electronics SB RAS, 2/3 Akademichesky, Tomsk

634055, Russia^1

National Research Tomsk State University, 36 Lenina Ave., Tomsk

634050, Russia^2

关键词: Aluminum cathode;    Current pulse;    Gap length;    Incident waves;    Interelectrode distance;    Runaway electron beams;    Supershort avalanche electron beams;    Voltage pulse;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/830/1/012007/pdf
DOI  :  10.1088/1742-6596/830/1/012007

来源: IOP

【 摘 要 】

Parameters of a supershort avalanche electron beam (SAEB) in nitrogen excited by the triangular-shaped voltage pulses with 45kV amplitude in incident wave and full width at half-maximum (FWHM) of ∼ 1 ns were investigated. In experiments, cylindrical-shaped cathodes made of aluminum and stainless steel were used. An interelectrode distance in the gas-filled diode was 3, 5, and 8 mm. It was established that the highest values of SAEB's current were registered with an aluminum cathode. It was shown that, in contrast to the case of 8-mm gap length, when the interelectrode distances were 3 and 5 mm, the amplitude of SAEB current pulse in nitrogen began to decrease with high values of the pressure - 100 and 50 kPa, respectively.