text: 300,75,1138760461153755136,923132721760649216,kosukekurosawa,Our paper has been accepted for publication in Geophysical Research Letters. We developed a new experimental method for 2-stage H2 gas guns. Our method allows us to do in-situ analysis of impact-generated vapor with a small risk of chemical contamination. <LINK>,https://arxiv.org/abs/1906.03913,"Dry lakebeds might constitute large volatile reservoirs on Mars. Hypervelocity impacts onto ancient dry lakebeds would have affected the volatile distribution on Mars. We developed a new experimental method to investigate the response of evaporitic minerals (halite and gypsum) to impact shocks in an open system. This technique does not result in chemical contamination from the operation of the gas gun. The technique is termed the two-valve method and the gun system is located in the Planetary Exploration Research Center, Chiba Institute of Technology, Japan. We detected the vaporization of halite at 31 GPa and devolatilization from gypsum at 11 GPa, suggesting that impact-induced volatile release from dry lakebeds has periodically occurred throughout Martian history. The vaporization of halite deposits might have enhanced the production of perchlorates, which are found globally on Mars. The water loss from gypsum possibly explains the coexisting types of Ca-sulfates found in Gale Crater. ","Shock vaporization/devolatilization of evaporitic minerals, halite and