Full Impact of the SPS Proton Beam With a Solid Cylindrical W Target: Simulations of the Future HiRadMat Facility Experiments

In this contribution we present numerical simulations of full impact of the Super Proton Synchrotron (SPS) beam with a solid tungsten cylindrical target that is facially irradiated. The beam comprises of 288 bunches and each bunch is made of 1.15 × 10 450 GeV protons. The bunch length is 0.5 ns and two neighboring bunches are separated by 25 ns so that the total duration of the beam is about 7 μs. Transverse intensity distribution in the focal spot is Gaussian and three different sizes of the focal spot characterized by σ = 0.088, 0.28 and 0.88 mm, respectively, are considered. The energy loss of the projectile particles in the target is calculated using the FLUKA code [1] and this data is used as input to a 2D hydrodynamic computer code, BIG2 [2] to study the thermodynamic and hydrodynamic response of the target. Energy deposited by a few tens of bunches lead to strong target heating that generates very high pressure (of the order of 30 GPa) which generates an outgoing radial shock wave. As a consequence, the density in the beam heated region decreases that leads to a longer penetration depth of the projectile particles. In Figs. 1–3 we plot the target density distribution at the end of the SPS beam (7.2 μs) for the three different sizes of the beam focal spot. It is seen