Shock Compression Measurement for 2169 Steel at 2 TPa

A shock wave generated by an underground explosion was used to perform the shock compression measurement for the 2169 steel sample. The measurement is based on impedance-matching method and the iron material is used for standard. An array of 47 electrical pins was used to determine the shock velocities in the standard in the 2169 steel sample, and the shape of the shock front. The measured shock compression parameters are as follows: us (shock velocity)=22.12 km/s, up (particle velocity)=13.39 km/s, p (shock pressure)=2.31 TPa and (shock compression ratio)=2.53. The measured results are in agreement with the extrapolation value of the previous experiment performed using explosive system at lower pressures.