Simulation_cathode_Part 2.pdf (1.07 MB)
Download fileSimulation of electrooptical measurements of prebreakdown electric fields in water. Part 2. Electric field near cathode streamer
preprint
posted on 03.03.2022, 18:05 by Vladimir YassinskiyVladimir Yassinskiy, Yulia Kuznetsova, Sergey Korobeynikov, Denis VaginIn this paper, we continue the analysis of
electrooptical studies of the prebreakdown stage in water in the submicrosecond
range. We consider a cathode streamer developing in a system of the spherical
electrodes. Computer simulation of electric showed that at a constant e = 80, the field strength at the head of the
cathode streamer should not exceed E = 1.9 MV/cm. Taking into account the
nonlinearity of the permittivity e = e(E) made it possible to estimate this field
strength as E ~ 2.4-3.1 MV/cm. It is shown that even with some excess of the
strength over the threshold value (ES ~ 3 MV/cm), at which the state
of dipole saturation is possible; its consideration does not lead to a
noticeable change in the result. Thus, a significant decrease in the field
strength near the cathode streamer compared to the anode streamer was confirmed.