A5052320623- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
- Particle Accelerators and Free-Electron Lasers
- Ocular and Laser Science Research
- Spectroscopy and Laser Applications
- High-pressure geophysics and materials
- Traumatic Ocular and Foreign Body Injuries
- Spectroscopy and Quantum Chemical Studies
- Particle accelerators and beam dynamics
- Advanced X-ray Imaging Techniques
- Solid State Laser Technologies
- Advanced Fiber Laser Technologies
- Laser Design and Applications
- Advanced Optical Sensing Technologies
Ludwig-Maximilians-Universität München
2021-2024
Institute of Photonic Sciences
2020-2024
Abstract The recent advent of deep artificial neural networks has resulted in a dramatic increase performance for object classification and detection. While pre-trained with everyday objects, we find that state-of-the-art detection architecture can very efficiently be fine-tuned to work on variety tasks high-power laser laboratory. In this paper, three exemplary applications are presented. We show the plasma waves laser–plasma accelerator detected located optical shadowgrams. wavelength...
We present experimental results on a plasma wakefield accelerator (PWFA) driven by high-current electron beams from laser (LWFA). In this staged setup stable and high quality (low divergence low energy spread) are generated at an optically-generated hydrodynamic shock in the PWFA. The stability of produced that arrangement PWFA stage is comparable to both single-stage accelerators conventional accelerators. Simulations support intrinsic insensitivity PWFAs driver fluctuations can be...
Optimization of accelerator performance parameters is limited by numerous trade-offs, and finding the appropriate balance between optimization goals for an unknown system challenging to achieve. Here, we show that multiobjective Bayesian can map solution space a laser wakefield (LWFA) in very sample-efficient way. We observe there exists wide range Pareto-optimal solutions trade beam energy versus charge at similar laser-to-beam efficiency. Moreover, many applications such as light sources...
BaGa2GeSe6 (BGGSe) is a newly developed nonlinear material that attractive for ultrabroad frequency mixing and ultrashort pulse generation due to its comparably low dispersion high damage threshold. A numerical study shows the material's capacity octave-spanning mid-infrared up 18 µm. In first experiment, we show long crystal length of 2.6 mm yields energy 21 pJ at 100 MHz with spectral bandwidth covering 5.8 8.5 The electric field carrier-envelope-phase stable directly measured...
Plasma wakefield accelerators can be driven either by intense laser pulses (LWFA) or particle beams (PWFA). A third approach that combines the complementary advantages of both types plasma accelerator has been established with increasing success over last decade and is called hybrid LWFA→PWFA. Essentially, a compact LWFA exploited to produce an energetic, high-current electron beam as driver for subsequent PWFA stage, which, in turn, phase-constant, inherently laser-synchronized,...
We present the experimental demonstration of density downramp injection at a gas-dynamic shock in beam-driven plasma accelerator. The ultrashort driver electron beam with peak-current exceeding 10 kA allows operation blowout regime and enables witness bunches gentle ramps, i.e., longer than wavelength, which nurtures prospects for ultralow bunch emittance. By precision control over position we show that these can be energy-tuned acceleration gradients near 120 GV m−1.Received 13 April...
Abstract In recent years, significant progress has been made in laser wakefield acceleration (LWFA), both regarding the increase electron energy, charge and stability as well reduction of bandwidth bunches. Simultaneous optimization these parameters is, however, still subject an ongoing effort community to reach sufficient beam quality for next generation’s compact accelerators. this report, we show design slit-shaped gas nozzles providing centimeter-long supersonic jets that can be used...
Knowledge of spatio-temporal couplings such as pulse-front tilt or curvature is important to determine the focused intensity high-power lasers. Common techniques diagnose these are either qualitative require hundreds measurements. Here we present both a new algorithm for retrieving couplings, well novel experimental implementations. Our method based on expression spatio-spectral phase in terms Zernike-Taylor basis, allowing us directly quantify coefficients common couplings. We take...
Abstract We report on experimental investigations of plasma wave structures in a wakefield acceleration (PWFA) stage which is driven by electron beams from preceding laser accelerator. Femtosecond optical probing utilized to allow for direct visualization the dynamics inside target. compare two regimes driver propagates either through an initially neutral gas, or preformed plasma. In first case, waves are observed that quickly damp after few oscillations and located within narrow channel...
Abstract The Centre for Advanced Laser Applications in Garching, Germany, is home to the ATLAS-3000 multi-petawatt laser, dedicated research on laser particle acceleration and its applications. A control system based Tango Controls implemented both four experimental areas. device server approach features high modularity, which, addition hardware control, enables a quick extension of allows automated data acquisition parameters each shot. In this paper we present an overview our...
Abstract We propose the generation of a widely tunable UV-to-IR frequency comb by high-order sideband (HSB) spectrum emitted from semiconductors. In our theoretical simulations, we demonstrate signals two series (2 m <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mi mathvariant="normal">Ω</mml:mi> <mml:mi>seed</mml:mi> </mml:msub> </mml:math> + n 1) <mml:mi>ω</mml:mi> <mml:mi>driver</mml:mi> <mml:mo>,</mml:mo> and 2 <mml:mi>n</mml:mi> ), where are...
We present experimental results on a plasma wakefield accelerator (PWFA) driven by high-current electron beams from laser (LWFA). In this staged setup stable and high quality (low divergence low energy spread) are generated at an optically-generated hydrodynamic shock in the PWFA. The stability of produced that arrangement PWFA stage is comparable to both single-stage accelerators conventional accelerators. Simulations support intrinsic insensitivity PWFAs driver fluctuations can be...
Optimization of accelerator performance parameters is limited by numerous trade-offs and finding the appropriate balance between optimization goals for an unknown system challenging to achieve. Here we show that multi-objective Bayesian can map solution space a laser wakefield in very sample-efficient way. Using Gaussian mixture model, isolate contributions related electron bunch at certain energy observe there exists wide range Pareto-optimal solutions trade beam versus charge similar...
The recent advent of deep artificial neural networks has resulted in a dramatic increase performance for object classification and detection. While pre-trained with everyday objects, we find that state-of-the-art detection architecture can very efficiently be fine-tuned to work on variety tasks high-power laser laboratory. In this manuscript, three exemplary applications are presented. We show the plasma waves laser-plasma accelerator detected located optical shadowgrams. wavelength density...