Quasi-statically tamped target for warm dense matter experiments based on all ion accelerator

A quasi-statically tamped target for warm dense matter (WDM) experiments using all-ion accelerator (AIA) is presented. We compare the target state and homogeneity based on the KEK AIA with and without injector. For making WDM based on KEK AIA (without injector), we evaluated achievable state of aluminum target as a function of beam radius and target density using a two-dimensional cylindrical hydrodynamics code including heavy ion beam deposition profile. Results show that the beam radius should be less than 0.2 mm to make a WDM state. To evaluate uniformity of KEK AIA (with injector) driven targets, we compared the behaviors of a mono-layer and a tamped cylinder target. Results show that both targets can reach a warm dense state. In particular, the tamped target can achieve a well-defined warm dense state with long time scale. The comparison of the target behaviors of the KEK AIA with and without injector indicated that the estimated homogeneity of the target depends on the formulation of sound velocity of target material at beam irradiation time. (C) 2009 Elsevier B.V. All rights reserved.