Amplitudes and rise times of simulated sparks. Dots plot detected amplitude, as vs. rise time in the line scan, T, for sparks generated at random locations in the simulation volume, using a current of 30 pA and release durations Ξ between 0.5 and 35 ms. The sparks represented had as > 0.3. Green circles, average values (±SEM) in bins of T containing 300 sparks each. Line, single exponential fit to bin averages (Eq. 7, with b = 0.9409 and k = 0.7337 ms−1). Note that for sparks of constant release flux amplitude increases with T in a saturating manner. Pink symbols, bin averages of as for a set of 8,000 sparks simulated with current of 30 pA and Ξ = 5 ms. Note that while Ξ is constant, T varies in a narrow range, being in most cases greater than Ξ. Orange circles, bin averages of as of a set of 4,667 sparks simulated assuming the inverse relationship between Ξ and m3. (Ξ was exponentially distributed, with a minimum of 0.5 ms. m3 was calculated from Ξ by an approximate solution of Eq. 6 and Ξ ∼ T). Note that the dependence between averaged amplitude and T reflects well the inverse relationship between flux and release time assumed in the simulation.
