Influence of the equation of state of matter and ion beam characteristics on target heating and compression

N A Tahir,V E Fortov,R Bock,P Spiller,J Wieser,M Kirk,S Udrea,D Varentsov,D H H Hoffmann,R Piriz,A Shutov,I V Lomonosov

doi:10.1103/physrevstab.6.020101

Abstract

The subject of high-energy density (HED) in matter is of considerable interest to many branches of physics. Intense beams of energetic heavy ions are a promising tool for creating large samples of HED matter which can be used to study the equation-of-state properties of such exotic states of matter experimentally. The Gesellschaft fur Schwerionenforschung (GSI), Darmstadt, is a unique laboratory worldwide which has a heavy ion synchrotron facility, SIS18 (with a magnetic rigidity of 18 Tm), that delivers intense heavy ion beams. Using the beams generated at this present facility, interesting experimental work has been carried out in the field of HED matter (D. H. H. Hoffmann et al., Nucl. Instrum. Methods Phys. Res., Sect. B 161-162, 9 (2000)). The GSI is planning to significantly expand its accelerator capabilities with construction of a new synchrotron ring, SIS100, which will have a magnetic rigidity of 100 Tm. This new facility will deliver a uranium beam which will have orders of magnitude higher intensity than the existing facility and will also have the possibility of multibeam acceleration. This paper presents two-dimensional hydrodynamic simulations of different target geo- metries including solid as well as hollow cylinders that are irradiated with beams having different shapes of the focal spot which will be available at the SIS100 facility. These include a circular focal spot, an annular focal spot, and an elliptic focal spot, respectively. The purpose of this study is to determine the region of the physical parameters including density, temperature, and pressure that can be accessed using the SIS100 beam. This information, we hope, will be useful for designing experiments on the studies of thermophysical properties of matter including the designing of appropriate diagnostic tools.

Highlights

The accelerator capabilities of the Gesellschaft fur Schwerionenforschung (GSI), Darmstadt, will be significantly enhanced due to construction of a new synchrotron facility, SIS100, which will have a magnetic rigidity of 100 Tm
This paper presents two-dimensional hydrodynamic simulations of different target geometries including solid as well as hollow cylinders that are irradiated with beams having different shapes of the focal spot which will be available at the SIS100 facility
In the former case one beam will be a highest intensity bunched beam which will heat the target while the second beam will be a much lower intensity unbunched beam which will be used for diagnostic purposes

Summary

Introduction

The accelerator capabilities of the Gesellschaft fur Schwerionenforschung (GSI), Darmstadt, will be significantly enhanced due to construction of a new synchrotron facility, SIS100, which will have a magnetic rigidity of 100 Tm. Intense heavy ion beams are a suitable and efficient tool for creating large samples of high-energy-density (HED) matter including strongly coupled plasmas. The GSI is a unique laboratory worldwide that has the possibility of generating intense heavy ion beams. The existing heavy ion synchrotron, SIS18 at the GSI, can deliver intense beams of different species of ions. Using the beams generated at the existing heavy ion accelerator facility, SIS18, important experimental work has been done in this field during the past few years [1,2,3,4,5]. Detailed numerical simulations of these experiments were performed in order to provide the necessary theoretical support. These simulations were carried out using a two-dimensional hydrodynamic computer code, BIG-2 [6]

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