Planetary Physics Studies at FAIR Using LAPLAS Scheme With a Circular Beam Focal Spot: The HEDgeHOB Collaboration

In another contribution we presented numerical simulation results of LAPLAS implosion [1] that uses an annular beam focal spot to drive the target. In the present contribution we report similar results that have been achieved using a circular focal spot. The rest of the beam parameters and the target parameters are the same as in the other case. The transverse intensity distribution in the focal spot is considered to be Gaussian with a FWHM = 1.5 mm. Different values of the beam intensity, N, including, 10, 3 × 10 and 5 × 10 ions per bunch, respectively, have been considered. The results are presented in Figs. 3–1, respectively where we plot the density, temperature and pressure vs radius at the middle of the cylinder (L=3.5 mm) at the time of maximum compression in the water region. These simulations been carried out using a 2D hydrodynamic code, BIG2 [2]. For water and tungsten, we use the equation-ofstate (EOS) data reported in [3] and [4], respectively.