U. Schramm
A5000828951- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Atomic and Molecular Physics
- High-pressure geophysics and materials
- Particle Accelerators and Free-Electron Lasers
- Advanced X-ray Imaging Techniques
- Laser Design and Applications
- Particle accelerators and beam dynamics
- Radiation Therapy and Dosimetry
- Solid State Laser Technologies
- Advanced Fiber Laser Technologies
- Nuclear Physics and Applications
- Mass Spectrometry Techniques and Applications
- Ion-surface interactions and analysis
- Magnetic confinement fusion research
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Radiotherapy Techniques
- Pulsed Power Technology Applications
- Drug Transport and Resistance Mechanisms
- Advanced Optical Sensing Technologies
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Plasma Diagnostics and Applications
- Laser Material Processing Techniques
Helmholtz-Zentrum Dresden-Rossendorf
2016-2025
Technische Universität Dresden
2016-2025
Universidad Autónoma de Baja California
2022
Novartis Institutes for BioMedical Research
2019-2022
Gwangju Institute of Science and Technology
2022
Novartis (Switzerland)
2000-2022
Ludwig-Maximilians-Universität München
2000-2019
Hochschule Bielefeld
2011-2019
Max Planck Institute of Quantum Optics
2006-2019
First Technical University
2019
Abstract This Conceptual Design Report describes LUXE (Laser Und XFEL Experiment), an experimental campaign that aims to combine the high-quality and high-energy electron beam of European with a powerful laser explore uncharted terrain quantum electrodynamics characterised by both high energy intensity. We will reach this hitherto inaccessible regime physics analysing electron-photon photon-photon interactions in extreme environment provided intense focus. The background its relevance are...
Abstract Plasma-based accelerators use the strong electromagnetic fields that can be supported by plasmas to accelerate charged particles high energies. Accelerating field structures in plasma generated powerful laser pulses or particle beams. This research has recently transitioned from involving a few small-scale efforts development of national and international networks scientists substantial investment large-scale infrastructure. In this New Journal Physics 2020 Plasma Accelerator...
Abstract Recent oncological studies identified beneficial properties of radiation applied at ultrahigh dose rates, several orders magnitude higher than the clinical standard order Gy min –1 . Sources capable providing these rates are under investigation. Here we show that a stable, compact laser-driven proton source with energies greater 60 MeV enables radiobiological in vivo studies. We performed pilot irradiation study on human tumours mouse model, showing concerted preparation mice and...
Abstract Laser-driven ion accelerators can deliver high-energy, high-peak current beams and are thus attracting attention as a compact alternative to conventional accelerators. However, achieving sufficiently high energy levels suitable for applications such radiation therapy remains challenge laser-driven Here we generate proton with spectrally separated high-energy component of up 150 MeV by irradiating solid-density plastic foil targets ultrashort laser pulses from repetitive petawatt...
Laser-driven, quasimonoenergetic electron beams of up to approximately 200 MeV in energy have been observed from steady-state-flow gas cells. These emitted within a low-divergence cone 2.1+/-0.5 mrad FWHM display unprecedented shot-to-shot stability (2.5% rms), pointing (1.4 and charge (16% rms) owing highly reproducible gas-density profile the interaction volume. Laser-wakefield acceleration cells this type provides simple reliable source relativistic electrons suitable for applications...
This paper presents a systematic investigation of an ultrashort pulse laser acceleration protons that yields unprecedented maximum proton energies 17 MeV at table-top Ti:sapphire power level 100 TW. For plain few-micron-thick foil targets, linear scaling the energy with is observed and this attributed to short period close target rear surface. Although excellent contrast was available, slight deformations were found lead predictable shift direction energetic emission away from normal could...
We report the observation of neutrons released from ${d(d,n)}^{3}\mathrm{He}$ fusion reactions in focus 200 mJ, 160 fs Ti:sapphire laser pulses on a deuterated polyethylene target. Optimizing fast electron and ion generation by applying well-defined prepulse led to an average rate 140 per shot. Furthermore, production substantial number MeV \ensuremath{\gamma} rays could be observed. The occurrence is attributed formation explosion relativistic plasma channel focus, which confirmed numerical...
We present a general expression for the maximum ion energy observed in experiments with thin foils irradiated by high-intensity laser pulses. The analytical model is based on radially confined surface charge set up accelerated electrons target rear side. only input parameters are properties of pulse and thickness. predicted optimal duration supported dedicated broad range different ions.
This Letter demonstrates the transporting and focusing of laser-accelerated 14 MeV protons by permanent magnet miniature quadrupole lenses providing field gradients up to $500\text{ }\text{ }\mathrm{T}/\mathrm{m}$. The approach is highly reproducible predictable, leading a focal spot $(286\ifmmode\times\else\texttimes\fi{}173)\text{ }\ensuremath{\mu}\mathrm{m}$ full width at half maximum 50 cm behind source. It decouples relativistic laser-proton acceleration from beam transport, paving way...
We report on the first irradiation of in vitro tumour cells with laser-accelerated proton pulses showing dose-dependent biological damage. This experiment, paving way for future radiobiological studies protons, demonstrates simultaneous availability all components indispensable systematic studies: a laser–plasma accelerator providing spectra maximum energy exceeding 15 MeV and applicable doses few Gy within minutes; beam transport filtering system; an in-air site; dosimetry system both...
The particle-in-cell (PIC) algorithm is one of the most widely used algorithms in computational plasma physics. With advent graphical processing units (GPUs), large-scale simulations on inexpensive GPU clusters are reach. We present an implementation a fully relativistic PIC for GPUs based NVIDIA CUDA library. It supports hybrid architecture consisting single computation nodes interconnected standard cluster topology, with each node carrying or more GPUs. internode communication realized...
Laser-plasma wakefield accelerators have seen tremendous progress, now capable of producing quasi-monoenergetic electron beams in the GeV energy range with few-femtoseconds bunch duration. Scaling these to nanocoulomb would yield hundreds kiloamperes peak current and stimulate next generation radiation sources covering high-field THz, high-brightness X-ray γ-ray sources, compact free-electron lasers laboratory-size beam-driven plasma accelerators. However, generating such currents operate...
Abstract Ultrashort flashes of THz light with low photon energies a few meV, but strong electric or magnetic field transients have recently been employed to prepare various fascinating nonequilibrium states in matter. Here we present new class sources based on superradiant enhancement radiation from relativistic electron bunches compact accelerator that believe will revolutionize experiments this field. Our prototype source generates high-field pulses at unprecedented quasi-continuous-wave...
A number of laser facilities coming online all over the world promise capability high-power experiments with shot repetition rates between 1 and 10 Hz. Target availability technical issues related to interaction environment could become a bottleneck for exploitation such facilities. In this paper, we report on target needs three different classes experiments: dynamic compression physics, electron transport isochoric heating, laser-driven particle radiation sources. We also review some most...
Plasma-based electron accelerators rely on excitation of light-speed plasma density waves and associated ultrahigh electric fields to accelerate electrons ultrarelativistic energy. Intrinsic time length scales these are typically a few tens femtoseconds micrometers result in ultrashort bunches with often even smaller temporal spatial dimensions. In this article the progress challenges diagnosing waves, excited fields, ensuing particle reviewed.
We study the feasibility of measuring vacuum birefringence by probing focus a high-intensity optical laser with an x-ray free electron (XFEL). This amounts to performing new type QED precision experiment, employing only pulses, hence space- and time-dependent fields. To set stage, we briefly review status tests then on example birefringence. Adopting realistic beam model in terms pulsed Gaussian beams calculate induced phase shift translate it into experimental signal, counting number...
We report on first commissioning results of the DRACO Petawatt ultra-short pulse laser system implemented at ELBE center for high power radiation sources Helmholtz-Zentrum Dresden-Rossendorf. Key parameters essential efficient and reproducible performance plasma accelerators are presented discussed with demonstration 40 MeV proton acceleration under TNSA conditions as well peaked electron spectra unprecedented bunch charge in 0.5 nC range.
We report on recent experimental results deploying a continuous cryogenic hydrogen jet as debris-free, renewable laser-driven source of pure proton beams generated at the 150 TW ultrashort pulse laser Draco. Efficient acceleration reaching cut-off energies up to 20 MeV with particle numbers exceeding 10
Abstract Free-electron lasers generate high-brilliance coherent radiation at wavelengths spanning from the infrared to X-ray domains. The recent development of short-wavelength seeded free-electron now allows for unprecedented levels control on longitudinal coherence, opening new scientific avenues such as ultra-fast dynamics complex systems and nonlinear optics. Although those devices rely state-of-the-art large-scale accelerators, advancements laser-plasma which harness...
The European XFEL delivers up to 27000 intense (>10 12 photons) pulses per second, of ultrashort (≤50 fs) and transversely coherent X-ray radiation, at a maximum repetition rate 4.5 MHz. Its unique beam parameters enable groundbreaking experiments in matter extreme conditions the High Energy Density (HED) scientific instrument. performance HED instrument during its first two years operation, remit, as well ongoing installations towards full operation are presented. Scientific goals...
Abstract We report on experimental investigations of proton acceleration from solid foils irradiated with PW-class laser-pulses, where highest cut-off energies were achieved for temporal pulse parameters that varied significantly those an ideally Fourier transform limited (FTL) pulse. Controlled spectral phase modulation the driver laser by means acousto-optic programmable dispersive filter enabled us to manipulate shape last picoseconds around main and study effect thin foil targets. The...
Laser plasma-based particle accelerators attract great interest in fields where conventional reach limits based on size, cost or beam parameters. Despite the fact that cell simulations have predicted several advantageous ion acceleration schemes, laser not yet reached their full potential producing simultaneous high-radiation doses at high energies. The most stringent limitation is lack of a suitable high-repetition rate target also provides degree control plasma conditions required to...