Detonation initiation in shielded thin layers of explosives by shaped-charge jets

The main features of detonation initiation in shielded thin layers of an explosive impacted by high-velocity metal shaped-charge jets are presented. It has been shown experimentally that the exclusion of the initial shock-wave stage of loading of the explosive by shielding the explosive layer by a compressible light material significantly reduces the initiating ability of the shaped-charge jet. The critical conditions of detonation initiation in thin layers of explosives placed between metal plates impacted by shaped-charge jets normally and at an angle of 30$^\circ$ have been experimentally determined; maximum thicknesses of the shielding plates of different materials have been determined above which detonation in the explosive does not occur even upon exposure to the high-velocity head element of a shaped-charge jet.