LRTTM E_L-I type instantaneous energy deposits (left) and HXR spectra (right) for the VAL C atmosphere at t = 0.3 s. The solid (M^FF) and dotted (M^SU) blue, green, red, yellow, and orange lines correspond to V m^-1 and var(E_L) = 0.1,0.5,1,2,5 V m^-1, respectively, and energy flux ℱ₀/2 = 2.5 × 10⁹ erg cm^-2 s^-1. The dashed and solid grey lines correspond to the CTTM with ℱ₀/2 = 2.5 × 10⁹ and 5 × 10¹⁰ erg cm^-2 s^-1, respectively. The dotted straight vertical line indicates the bottom boundary of the magnetic mirror, the grey area the secondary re-acceleration region. The HXR spectra are integrated over one half of the loop.