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The Gr\"uneisen parameter ({\gamma}) is crucial for determining many thermalproperties, including the anharmonic effect, thermostatistics, and equation ofstate (EOS) of materials. However, the isentropic adiabatic compressionconditions required to measure the Gr\"uneisen parameter under high pressureare difficult to achieve. Thus, direct experimental Gr\"uneisen parameter datain a wide range of pressures is sparse. In this work, we developed a new devicethat can apply pressure (up to tens of GPa) with an extremely short time about0.5 ms, confidently achieving isentropic adiabatic compression. Then, weapplied our new technique to sodium chloride and measured its Gr\"uneisenparameter, which conforms to previous theoretical predictions. According to ourobtained sodium chloride Gr\"uneisen parameters, the calculated Hugoniot curveof the NaCl B1 phase appears up to 20 GPa and 960 K, which compares very wellwith the shock compression experiment data by Fritz et al. and othercalculation works. Our results suggest that this new method can reliablymeasure the Gr\"uneisen parameter of even more materials, which is significantfor researching the equation of state in substances.

Expanding the Pressure Frontier in Gr\"uneisen Parameter Measurement: Study of Sodium Chloride