Experimental measurement of quasi-isentrope for copper on PTS

Based on PTS accelerator, combined with theoretical calculation and circuit simulation, magnetic driven loading experiments design method and sample loading path control techniques were developed and improved. With the excellent output characteristics of the platform PTS, quasi-isentropic compression of oxygen-free high-conductivity copper(OFHC) was realized. In these experiments, with the existing wave profile measuring technique, we measured the interface velocity history of two different thickness OFHC samples/LiF window material successfully. Combined with the Lagrange analysis and inverse integral method, we have successfully acquired the quasi-isentropic compression reference line of copper up to 100 GPa, which agrees well with that in SESAME dataset.