Variation in acceleration power (Eq. (6)) with the reconnection factor threshold K_min, for a simulation with δ = 4 and p = 0.2. The solid curve is the total power for all included reconnection sites, and the dashed curve is the average power per site (multiplied by 10⁵ for composition purposes). The total numbers of included sites are shown in the dotted curve. Short-range beams have been filtered out in the manner discussed in Sect. 2.3.2.