Discharge activity probability distribution

By repeating this experiment for different conditions, it is possible to determine Xd as a function of the terminal voltage U. At each value of U, the number of pulses in a fixed time interval (40 ms) are counted several times (500 times), and the probability of discharge Xd is evaluated by fitting the corresponding Poisson distribution (4.37). Figure 4.15 shows the experimental results for a 0.4 mm active cathode. 

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