Author Affiliations
Ludwig-Maximilians-Universität München, Garching, Germany
The Centre for Advanced Laser Applications in Garching, Germany, is home to the ATLAS-3000 multi-petawatt laser, dedicated to research on laser particle acceleration and its applications. A control system based on Tango Controls is implemented for both the laser and four experimental areas. The device server approach features high modularity, which, in addition to the hardware control, enables a quick extension of the system and allows for automated data acquisition of the laser parameters and experimental data for each laser shot. In this paper we present an overview of our implementation of the control system, as well as our advances in terms of experimental operation, online supervision and data processing. We also give an outlook on advanced experimental supervision and online data evaluation – where the data can be processed in a pipeline – which is being developed on the basis of this infrastructure.
data processing high-power laser experiments laser–plasma acceleration online diagnostics 
High Power Laser Science and Engineering
2023, 11(4): 04000e44
Author Affiliations
1 John Adams Institute for Accelerator Science, Blackett Laboratory, Imperial College London, London, UK
2 School of Maths and Physics, Queen’s University Belfast, Belfast, UK
3 Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, UK
4 SLAC National Accelerator Laboratory, Menlo Park, USA
5 ELI Beamlines Centre, Institute of Physics, CAS, Dolni Brezany, Czech Republic
6 Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic
7 Department of Physics, SUPA, University of Strathclyde, Glasgow, UK
8 Department of Mechanical Engineering, Stanford University, Stanford, USA
9 Department of Applied Physics, Stanford University, Stanford, USA
10 Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Canada
11 Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
We present the development and characterization of a high-stability, multi-material, multi-thickness tape-drive target for laser-driven acceleration at repetition rates of up to 100 Hz. The tape surface position was measured to be stable on the sub-micrometre scale, compatible with the high-numerical aperture focusing geometries required to achieve relativistic intensity interactions with the pulse energy available in current multi-Hz and near-future higher repetition-rate lasers ( $>$ kHz). Long-term drift was characterized at 100 Hz demonstrating suitability for operation over extended periods. The target was continuously operated at up to 5 Hz in a recent experiment for 70,000 shots without intervention by the experimental team, with the exception of tape replacement, producing the largest data-set of relativistically intense laser–solid foil measurements to date. This tape drive provides robust targetry for the generation and study of high-repetition-rate ion beams using next-generation high-power laser systems, also enabling wider applications of laser-driven proton sources.
high-repetition-rate laser target laser–plasma acceleration proton generation tape-drive target 
High Power Laser Science and Engineering
2023, 11(2): 02000e23
Author Affiliations
1 Intense Laser Irradiation Laboratory, INO-CNR, Pisa, Italy
2 ELI-NP, Magurele, Ilfov, Romania
3 Maison de la Simulation, CEA, USR 3441, Gif-sur-Yvette, France
4 INFN, Sect. of Pisa, Pisa, Italy
After the introduction of the ionization-injection scheme in laser wake field acceleration and of related high-quality electron beam generation methods, such as two-color and resonant multi-pulse ionization injection (ReMPI), the theory of thermal emittance has been used to predict the beam normalized emittance obtainable with those schemes. We recast and extend such a theory, including both higher order terms in the polynomial laser field expansion and non-polynomial corrections due to the onset of saturation effects on a single cycle. Also, a very accurate model for predicting the cycle-averaged distribution of the extracted electrons, including saturation and multi-process events, is proposed and tested. We show that our theory is very accurate for the selected processes of ${\mathrm{Kr}}^{8^{+}\to {10}^{+}}$ and ${\mathrm{Ar}}^{8^{+}\to {10}^{+}}$ , resulting in a maximum error below 1%, even in a deep-saturation regime. The accurate prediction of the beam phase-space can be implemented, for example, in laser-envelope or hybrid particle-in-cell (PIC)/fluid codes, to correctly mimic the cycle-averaged momentum distribution without the need for resolving the intra-cycle dynamics. We introduce further spatial averaging, obtaining expressions for the whole-beam emittance fitting with simulations in a saturated regime, too. Finally, a PIC simulation for a laser wakefield acceleration injector in the ReMPI configuration is discussed.
field theory ionization high-quality electron beams ionization injection laser wakefield acceleration laser–plasma acceleration resonant multi-pulse ionization injection tunnel ionization two-color ionization ultraintense laser pulses 
High Power Laser Science and Engineering
2022, 10(2): 02000e15
Author Affiliations
1 Intense Laser Irradiation Laboratory (ILIL), Istituto Nazionale di Ottica - Consiglio Nazionale delle Ricerche (INO-CNR), Sede Secondaria di Pisa, 56124Pisa, Italy
2 Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Pisa, 56127Pisa, Italy
We present the main features of the ultrashort, high-intensity laser installation at the Intense Laser Irradiation Laboratory (ILIL) including laser, beam transport and target area specifications. The laboratory was designed to host laser–target interaction experiments of more than 220 TW peak power, in flexible focusing configurations, with ultrarelativistic intensity on the target. Specifications have been established via dedicated optical diagnostic assemblies and commissioning interaction experiments. In this paper we give a summary of laser specifications available to users, including spatial, spectral and temporal contrast features. The layout of the experimental target areas is presented, with attention to the available configurations of laser focusing geometries and diagnostics. Finally, we discuss radiation protection measures and mechanical stability of the laser focal spot on the target.
high-intensity laser laser focusing laser–plasma acceleration laboratory pointing stability radiation shielding ultrashort pulse amplification 
High Power Laser Science and Engineering
2021, 9(2): 02000e10
Author Affiliations
Key Laboratory for Laser Plasmas (MOE) and Department of Physics and Astronomy, Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China
Ionization-induced electron injection in laser wakefield accelerators, which was recently proposed to lower the laser intensity threshold for electron trapping into the wake wave, has the drawback of generating electron beams with large and continuous energy spreads, severely limiting their future applications. Complex target designs based on separating the electron trapping and acceleration stages were proposed as the only way for getting small energy-spread electron beams. Here, based on the self-truncated ionization-injection concept which requires the use of unmatched laser–plasma parameters and by using tens of TW laser pulses focused onto a gas jet of helium mixed with low concentrations of nitrogen, we demonstrate single-stage laser wakefield acceleration of multi-hundred MeV electron bunches with energy spreads of a few percent. The experimental results are verified by PIC simulations.
ionization injection ionization injection laser–plasma acceleration laser–plasma acceleration PIC simulations PIC simulations self-truncation self-truncation wakefield wakefield 
High Power Laser Science and Engineering
2016, 4(3): 03000e24
Author Affiliations
National Institute of Optics, National Research Council (CNR/INO), Research Unit ‘Adriano Gozzini’, Department of Physics ‘Enrico Fermi’, University of Pisa, largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
A short overview of the theory of acceleration of thin foils driven by the radiation pressure of superintense lasers is presented. A simple criterion for radiation pressure dominance at intensities around 5×1020 W cm-2 is given, and the possibility for fast energy gain in the relativistic regime is discussed.
light sail radiation pressure laser-plasma acceleration of electrons and ions laser-driven acceleration 
High Power Laser Science and Engineering
2014, 2(2): 02000e10

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