Аннотация
In 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 (E S ~ 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.