“…Time-resolved spectroscopic measurements revealed that the plasma density and temperature behind the shock front has an appropriate spatial and temporal distribution to be used as a target for interaction experiments [15]. On the other hand, an energy loss measurement system compatible with gas targets has been developed in parallel with shock tube development [16,17]. In this system we adopted a twostage differential pumping to confine the target gas and a silicon semiconductor detector to directly measure the energy of single ions.…”