Figure 3

The obtained electron density (a) and temperature (b) for all five cases of increasing resistance during and after the applied \(5\, \upmu \text {s}\) high voltage pulses. For high electron densities (e.g. above \(6\cdot 10^{14}\, \text {cm}^{-3}\)) 1200 exposures were taken at each data point and 6000 exposures for lower electron densities.