William Barth

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We present an end-to-end optimization of the innovative Arbitrary high-order DERivative Discontinuous Galerkin (ADER-DG) software SeisSol targeting Intel<sup>&#174;</sup> Xeon Phi<sup>&#8482;</sup> coprocessor platforms, achieving unprecedented earthquake model complexity through coupled simulation of full frictional sliding and seismic wave propagation.(More)
Physics-based flow visualization techniques seek to mimic laboratory flow visualization methods with virtual analogues. In this work we describe the rendering of a virtual rheoscopic fluid to produce images with results strikingly similar to laboratory experiments with real-world rheoscopic fluids using products such as Kalliroscope. These fluid additives(More)
The present GSI accelerator chain will serve as an injector for FAIR (Facility for Antiproton and Ion Research). The linear accelerator UNILAC and the heavy ion synchrotron SIS18 should deliver up to 1⋅10 U-particles/sec. In the past two years different hardware measures and a careful fine tuning of the UNILAC resulted in an 35% increase of the beam(More)
The new 1.4 MeV/u front end HSI (HochStromInjektor) of the Unilac accelerates ions with A/q ratios of up to 65 and with beam intensities in emA of up to 0.25 A/q. The maximum beam pulse power is up to 1300 kW. During the stepwise linac commissioning from April to September 1999 the beam behind of each cavity was analysed within two weeks. A very stable Ar(More)
In a particle accelerator with a periodic structure beam space charge force may excite resonant beam emittance growth if the particle's transverse phase advance approaches 90 degrees . A recent simulation study with the PARMILA code [D. Jeon, Phys. Rev. ST Accel. Beams 12, 054204 (2009)]10.1103/PhysRevSTAB.12.054204 has shown the feasibility of measuring(More)
The GSI Unilac was upgraded as a high current injector for the SIS in 1999. Therefore, the stripping section [1] at 1.4 MeV/u, where a beam transport under highest space charge conditions and multi beam operation had to be established, was completely new designed. Results of the commissioning of the stripper section will be presented. The beam transport to(More)
The accelerator part of the clinical facility for cancer therapy HIT using energetic proton and ion beams (C, He and O) has been installed during 2006 at the Radiologische Universitätsklinik in Heidelberg, Germany [1]. The commissioning of the injector linac was performed in three steps for the LEBT, the RFQ and the IH-DTL and has successfully ended in(More)
During the beam time in 2003 a carbon beam from the ECR ion source was mainly accelerated via the high charge state injector (HLI) in the UNILAC for the SIS-injection like in the years before [1]. Several UNILAC experiments used the beam with high duty factor additionally. Additionally, the ECR source was in operation for the production of various isotopes(More)
At present 3 prototype CH-cavities are under design and / or construction at velocity ranges from β = 0.05 up to β = 0.45 to further improve and explore the capabilities of that novel type of multi-cell superconducting cavity. CH-Cavity Design A 325 MHz, 7 cell, β = 0.15 CH-cavity has been designed and is currently under construction at Research Instruments(More)