Detonation initiation and propagation in a cylindrical TATB charge

The process of detonation propagation in semi-annular charges made of plasticized TATB with a steel shell inside during initiation of normal detonation along a line on the outer surface of the charge was studied using the X-ray method. In the experiments, the shape of the detonation wave front was determined using the X-ray method at different moments in time. The experiments recorded the effect of a layer of plastic explosive based on hexogen located on the surface of the main charge and having a detonation velocity $\approx$10% higher than that of TATB on the shape of the detonation front. The experimental position and shape of the detonation wave front in a cylindrical TATB charge are not described by the laws of geometric optics (Huygens principle) due to the peculiarities of detonation initiation in the initial section and the presence of a steel shell. Numerical modeling of the experiments was carried out using the LEGAK technique using macroscopic detonation kinetics. A similar to the experimental picture of the initiation and propagation of detonation in the TATB charge was obtained. A theoretical analysis of the features of the propagation of the detonation wave was carried out.