Unique capabilities of an intense heavy ion beam as a tool for equation-of-state studies

Abstract

Intense heavy ion beams open new possibilities in high-energy-density matter research. Due to the unique feature of the energy deposition process of heavy ions in dense matter (volume character of heating) it is possible to generate high entropy states in matter without the necessity of shock compression. Previously, such high entropy states could only be achieved by using the most powerful shock wave generators, like nuclear explosions or powerful lasers. In this paper this novel technique of heavy ion heating and expansion is proposed to explore new fascinating regions of the phase diagram, including the liquid phase, the evaporation region with the critical point, and strongly coupled plasmas.

Ramp wave loading experiments driven by heavy ion beams: A feasibility study

“…The major benefit of the presented experimental design as compared to other approaches for EOS measurement with heavy ion beams (Arnold et al, 1982;Hoffmann et al, 2002) is two-fold. First, the EOS along a compression adiabat can be determined by measuring of only one parameter-the rear surface velocity employing a line-imaging VISAR as the principal diagnostics.…”

Experiments on extreme states of matter towards HIF at FAIR

“…Due to the unique feature of the energy deposition of heavy ions in dense matter-volume character of heating-it is possible to generate extreme states of matter that cannot be accessed with other drivers. This will open up the possibility to explore the thermo-physical and transport properties of high energy density (HED) matter in a regime that is very difficult to access using the traditional methods of shock compression [4]. In case of shock compression, matter is irreversibly heated and this generates states of high pressure, high entropy in the sample material.…”

Dieter H.H. Hoffmann at 60 Years

“…Since 1988 he developed strong collaborative ties to institutes in Russia which at that time was still Soviet Union (Fortov et al, 2008;Hoffmann et al, 2002). The success of this collaboration is documented in numerous publications.…”