K. Weyrich

A study on fabrication, manipulation and survival of cryogenic targets required for the experiments at the Facility for Antiproton and Ion Research: FAIR

Cylindrical cryogenic targets are required to carry out the Laboratory Planetary Science scheme of the experiments of the High Energy Density matter Generated by Heavy Ion Beams collaboration at FAIR. In this paper, for the first time a thorough analysis of the problem of such targets’ fabrication, delivery and positioning in the center of the experimental chamber has been made. Particular attention is paid to the issue of a specialized cryogenic system creation intended for rep-rate supply of the High Energy Density matter Generated by Heavy Ion Beams experiments with the cylindrical cryogenic targets.

Frontiers of dense plasma physics with intense ion and laser beams and accelerator technology

Interaction phenomena of intense ion and laser radiation with matter have a large range of application in different fields of science, from basic research of plasma properties to application in energy science. The hot dense plasma of our neighbouring star the Sun provides a deep insight into the physics of fusion, the properties of matter at high energy density, and is moreover an excellent laboratory for astroparticle physics. As such the Suns interior plasma can even be used to probe the existence of novel particles and dark matter candidates. We present an overview on recent results and developments of dense plasma physics addressed with heavy ion and laser beams combined with accelerator and nuclear physics technology.

X-ray spectromicroscopy of fast heavy ions and target radiation

A new technique for X-ray spectromicroscopy of fast heavy ion radiation during the ion interaction with stopping media is presented using focusing spectrometers with spatial resolution. Spherically bent crystals of quartz and mica with small curvature radii, R ¼ 150 mm, and large apertures were used as dispersive elements in experiments on fast Ni ions with energies of 5.9 and 11.2 MeV/u which are being stopped in different media: Ar gas, SiO2-aerogels and solid quartz. Spectrally high (l=Dl ¼ 100023000) and spatially high (up to 10–100mm) resolved Ka-satellite spectra of Ni projectiles as well as of the ionized stopping media were observed. r 2002 Elsevier Science B.V. All rights reserved.

Shockwave-driven, non-ideal plasmas for interaction experiments with heavy-ion beams

Plasma targets for measuring energy loss and charge-state distribution of heavy ions in non-ideal plasmas have been developed. Ar plasmas with Γ-parameters 0.55–1.5 could be realized and the interaction with several ion species studied. Here, the results for 5.9 MeV/u C ions are presented. The energy loss in plasma was reproduced in different experiments.

Commissioning of the PRIOR proton microscope

Recently, a new high energy proton microscopy facility PRIOR (Proton Microscope for FAIR Facility for Anti-proton and Ion Research) has been designed, constructed, and successfully commissioned at GSI Helmholtzzentrum für Schwerionenforschung (Darmstadt, Germany). As a result of the experiments with 3.5-4.5 GeV proton beams delivered by the heavy ion synchrotron SIS-18 of GSI, 30 μm spatial and 10 ns temporal resolutions of the proton microscope have been demonstrated. A new pulsed power setup for studying properties of matter under extremes has been developed for the dynamic commissioning of the PRIOR facility. This paper describes the PRIOR setup as well as the results of the first static and dynamic proton radiography experiments performed at GSI.

Methods of charge-state analysis of fast ions inside matter based on their X-ray spectral distribution

The X-ray spectral distribution of swift heavy Ti and Ni ions (11 MeV/u) observed inside aerogels (ρ = 0.1 g/cm 3 ) and dense solids (quartz, p = 2.23 g/cm 3 ) indicates a strong presence of simultaneous 3-5 charge states with one K-hole. We show that the theoretical analysis can be split into two tasks: first, the treatment of complex autoionizing states together with the originating spectral distribution, and, second, a charge-state distribution model. Involving the generalized line profile function theory, we discuss attempts to couple charge-state distributions.

Commissioning of the PRIOR prototype

PRIOR (Proton Microscope for FAIR) is one of the three frameworks proposed by the HEDgeHOB collaboration for the future experiments at FAIR. This worldwide unique high-energy proton microscopy (HEPM) facility will be integrated into the HEDgeHOB SIS-100 beam line and employ high-energy (3 − 10 GeV), high-intensity (2.5 · 10 ppp) proton beams for fascinating multidisciplinary research such as experiments on fundamental properties of materials in extreme dynamic environments generated by external drivers (pulsed power generators, highenergy lasers, gas guns or explosive-driven generators) prominent for materials research and high energy density physics as well as the PaNTERA ( Proton Therapy and Radiography) experiment, with a great relevance to biophysics and medicine. Recently, as a result of the international effort of a team of scientists from GSI, LANL, ITEP and TUD a PRIOR prototype has been designed, constructed and commissioned at the HHT area of GSI (Fig. 1 (left)). The PRIOR prototype employs high-gradient NdFeB permanent magnet quadrupole (PMQ) lenses developed by ITEP and provides a magnification of ≈ 4 − 5 with a field of view of ≈15 mm.