“…The dynamical form factor describing fluctuations at wave number k and frequency v, S͑k, v; x͒, has been calculated locally to take into account the spatial variations of n e , T e , and V along the direction x, normal to the disk. It further includes collisional effects [21,22], super-Gaussian electron velocity distribution functions [23,24], and Spitzer-Härm [25] electron transport. Figure 2(b) shows the electron feature at various times showing a heavily damped epw resonance with a wavelength shift that decreases as the heater beam turns off.…”