Model prediction of spark amplitudes. A, dots represent a vs. T for the first set of experimental sparks (as in Fig. 1 A). Circles represent their bin averages (as in Fig. 1 B). The curve in blue plots a as a function of T, calculated with “model 1,” that is, Eqs. 9 and 6, with parameter values given in the legends of Figs. 4 and 5. The curve in red is by “model 2,” for which m3 is assumed constant (37 pA) at T < 4.4 ms. Note that in this range of T the a(T) dependence is exponential, given by Eq. 7 scaled by 37/30. (B) Bin-averaged experimental a (circles), prediction by models 1 (blue line) and 2 (red), plotted as a function of both T (as in A) and m3. The plot illustrates the model calculation of a, which relies on the bijective correspondence between T and m3 given by Eq. 6.
