A5012197636- Atomic and Molecular Physics
- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
- Laser Design and Applications
- Advanced X-ray Imaging Techniques
- High-pressure geophysics and materials
- Particle Accelerators and Free-Electron Lasers
- Cold Atom Physics and Bose-Einstein Condensates
- Adaptive optics and wavefront sensing
- X-ray Spectroscopy and Fluorescence Analysis
- Radioactive Decay and Measurement Techniques
- Magnetic confinement fusion research
- Solid State Laser Technologies
- Surface Roughness and Optical Measurements
- Particle accelerators and beam dynamics
- Laser Material Processing Techniques
- Mass Spectrometry Techniques and Applications
- Relativity and Gravitational Theory
- Algebraic and Geometric Analysis
- Advanced Surface Polishing Techniques
- Scientific Measurement and Uncertainty Evaluation
- Optical Systems and Laser Technology
- Diamond and Carbon-based Materials Research
- Particle Detector Development and Performance
GSI Helmholtz Centre for Heavy Ion Research
2011-2024
National Institute for Laser Plasma and Radiation Physics
2013
GfK (Germany)
2009
Max Planck Society
1998-2003
Max Planck Institute for Nuclear Physics
1999-2003
At the Helmholtz center GSI, PHELIX (Petawatt High Energy Laser for heavy Ion eXperiments) has been commissioned operation in stand-alone mode and, combination with ions accelerated up to an energy of 13 MeV/u by ion accelerator UNILAC. The heavy-ion beams available at GSI enables a large variety unique experiments. Novel research opportunities are spanning from study ion–matter interaction, through challenging new experiments atomic physics, nuclear and astrophysics, into field relativistic...
An improved test of time dilation in special relativity has been performed using laser spectroscopy on fast ions at the heavy-ion storage-ring TSR Heidelberg. The Doppler-shifted frequencies a two-level transition 7Li+ v=0.064c have measured forward and backward direction to an accuracy Deltanu/nu=1 x 10(-9) collinear saturation spectroscopy. result confirms relativistic Doppler formula sets new limit 2.2 10(-7) for deviations from factor gamma(SR)=(1-v2/c2)(-1/2).
We present a study of laser-driven ion acceleration with micrometre and sub-micrometre thick targets, which focuses on the enhancement maximum proton energy total number accelerated particles at PHELIX facility. Using laser pulses nanosecond temporal contrast up to $10^{-12}$ an intensity order $10^{20}~\text{W}/\text{cm}^{2}$ , energies 93 MeV are achieved. Additionally, conversion efficiency $45^{\circ }$ incidence angle was increased when changing polarization p, enabling similar particle...
Abstract The high-energy/high-intensity laser facility PHELIX of the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany, has been operation since 2008. Here, we review current system performance, which is result continuous development and further improvement. Through its versatile frontend architecture, can be operated both long- short-pulse modes, corresponding to ns-pulses with up 1 kJ pulse energy sub-ps, 200 J pulses, respectively. In mode, excellent temporal contrast...
Transverse laser cooling of a fast stored ${}^{9}{\mathrm{Be}}^{+}$ ion beam based on single-particle force independent the density is demonstrated at Heidelberg Test Storage Ring. The scheme exploits longitudinal-horizontal coupling through ring dispersion and transverse intensity profile longitudinally merged beam. By linear betatron horizontal extended to vertical degree freedom resulting in true 3D cooling. observed transverse-cooling mechanism represents an important step towards...
Abstract Laguerre–Gaussian-like laser beams have been proposed for driving experiments with high-intensity lasers. They carry orbital angular momentum and exhibit a ring-shaped intensity distribution in the far field which make them particularly attractive various applications. We show experimentally numerically that this donut-like shape is extremely sensitive to off-axis wavefront deformations. To support our claim, we generate beam apply selection of common low-order aberrations....
Abstract In order to reach the highest intensities, modern laser systems use adaptive optics control their beam quality. Ideally, focal spot is optimized after compression stage of system in avoid spatio-temporal couplings. This also requires a wavefront sensor compressor, which should be able measure on-shot. At PHELIX, we have developed an ultra-compact post-compressor diagnostic due strict space constraints, measuring over full aperture 28 cm. features all-reflective imaging transport and...
Abstract The spatial distribution of beams with orbital angular momentum in the far field is known to be extremely sensitive aberrations, such as astigmatism, coma and trefoil. This poses a challenge for conventional beam optimization strategies when homogeneous ring intensity required an application. We developed novel approach estimating Zernike coefficients low-order aberrations near based solely on analysis deformations field. A fast, iterative reconstruction focal recreates provides...
Proposed as satellite-based weapons during the 1980s, X-ray lasing was for a long time only achieved with enormous amounts of pump energy in either nuclear explosions or at kilojoule-class laser installations. During last few years tremendous development achieved, most visible realisation FEL lasers DESY and SLAC. As important wider applicability is reduction pumped plasma lasers, which now brings such devices into range applications diagnostics spectroscopy even smaller laboratories. Main...
Off-axis parabolic telescopes are rarely used in high-intensity, high-energy lasers, despite their favorable properties for beam transport such as achromatism, low aberrations and the ability to handle high peak intensities. One of major reasons this is alignment procedure which commonly viewed complicated time consuming. In article, we revisit off-axis context high-intensity laser systems present a corresponding analytical model. Based on that, propose suitable setup that enables fast...
The PHELIX facility is available to users since 2008. Nanosecond pulses up 500 J are utilized at present for experiments combining the heavy ions accelerated GSI LINAC facility, while sub-picosecond 200-TW used in laser stand-alone experiments. A review of performance and future developments shown.
The PHELIX laser at the GSI Helmholtz center for heavy-ion research is dedicated to provide high energy, ultra-intense pulses experiments in combination with energetic ion beams. Development of x-ray lasers targeting a number applications this context, including spectroscopy highly-charged ions, and Thomson scattering diagnostics driven plasmas. Recent developments centered on application novel double-pulse pumping scheme under GRIP-like, non-normal incidence geometry both pre- main pulse...
By combining an x-ray laser (XRL) with a heavy-ion storage ring, precision spectroscopy of the fine-structure splitting in heavy Li-like ions will be possible. An initial study has been performed to determine feasibility first experiment at experimental ring GSI Darmstadt, which also great potential for experiments planned FAIR. We plan perform unique, direct and precise measurement transition ion. Such test state-of-the-art atomic structure calculations strong fields. This endeavour require...
A new high energy proton radiography facility PRIOR-II (Proton Microscope for FAIR) has been designed, constructed, and successfully commissioned at the GSI Helmholtzzentrum für Schwerionenforschung (Darmstadt, Germany) pushing technical boundaries of charged particle with normal conducting magnets to limits. The setup is foreseen become a powerful user carrying out fundamental science experiments in fields plasma shock wave physics, material science, medical physics. It will help address...
We propose and demonstrate a method for shaping the focus of high intensity lasers into an annular or "donut" mode. The method, based on helical phase plates, has been implemented at PHELIX laser facility.
We propose and demonstrate the use of random phase plates (RPPs) for high-energy sub-picosecond lasers. Contrarily to previous work related nanosecond lasers, an RPP poses technical challenges with ultrashort-pulse Here, we implement near beginning amplifier image-relay it throughout laser amplifier. With this, obtain a uniform intensity distribution in focus over area 1600 times diffraction limit. This method shows no significant drawbacks has been implemented at PHELIX facility where is...