Alex Picksley

Data and code from: Revealing laser and electron beam evolution in 10-GeV-class laser-plasma accelerators

Hongmei Tang, Alex Picksley, Carlo De Benedetti, Raymond Li et autres

This dataset contains the numerical arrays and Jupyter notebooks used to generate Figures 1–6 of the associated Physical Review Research article. It combines longitudinally resolved experimental measurements of electron-beam and laser evolution with particle-in-cell simulation results for a channel-guided laser-plasma accelerator. The …

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Energy-resolved measurement of individual GeV muon tracks generated by electrons from a compact Laser-Plasma Accelerator

Davide Terzani, Luc Le Pottier, S. Kisyov, Pranav Manoj et autres

Recently, the possibility of LPA-produced muon beams has gained significant interest within the accelerator application community. Directional, multi-GeV muons can be produced via Bethe-Heitler interactions when multi-GeV electrons hit solid targets. They are highly penetrating and, thanks to the compactness of the …

Machine learning-enhanced deterministic controls in lasers and accelerators

Dan Wang, Alessio Amodio, Alex Picksley, Anthony J. Gonsalves et autres

Modern laser and accelerator systems demand fast, precise, and scalable multi-input multi-output (MIMO) feedback control. As requirements extend into high-repetition-rate and nonlinear regimes, traditional strategies increasingly struggle to deliver the necessary speed and adaptability. This talk presents two cases where machine learning …

Controlled injection and acceleration of electron beams in optically-formed plasma channels

Alex Picksley

Preformed plasma channels can increase the maximum energy gain of a laser-plasma accelerator. Recently, optically formed plasma channels have gained attention because they produce tightly confined channels at densities required for 10-GeV-class acceleration. In this talk, we discuss high-quality beam production in …

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Measurement of directional muon beams generated at the Berkeley Lab Laser Accelerator

Davide Terzani, S. Kisyov, Stephen H. Greenberg, L. T. Le Pottier et autres

We present the detection of directional muon beams produced using a PW laser at the Lawrence Berkeley National Laboratory. The muon source is a multi-GeV electron beam generated in a 30 cm laser plasma accelerator interacting with a high-Z converter target. The …

High-throughput homogenization of a quasi-Gaussian ultrafast laser beam using a combined refractive beam shaper and spatial light modulator

Hailang Pan, Deepak Sapkota, A. McIlvenny, Anthony Lu et autres

Efficiently shaping femtosecond, transverse Gaussian laser beams to flat-top beams with flat wavefronts is critical for large-scale material processing and manufacturing. Existing beam shaping devices fall short either in final beam homogeneity or efficiency. We present an approach that uses refractive optics …

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Commissioning of the Second Beamline Upgrade to BELLA PW

Alex Picksley, Anthony J. Gonsalves, Marlene Turner, Lieselotte Obst-Huebl et autres

The petawatt (PW) facility at BErkeley Lab Laser Accelerator (BELLA Center) has successfully performed ex-periments since its installation in 2012 primarily focusing on optimization of single stage, high energy gain laser-plasma accelerators (LPAs). Recently, a new second beamline delivered into the existing …

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Low density plasma waveguides for multi-GeV laser Wakefield accelerators

Alex Picksley

Particle accelerators are vital tools for discovery in the fields of medicine, engineering, life sciences and physics. These machines, however, are becoming increasingly large, technically challenging to construct, and uneconomical. Laser wakefield accelerators (LWFAs) provide immense accelerating fields, and offer the potential …

laser guiding in plasma channels for high-rep-rate, low-plasma-density LWFAs (Conference Presentation)

S. M. Hooker, Christopher Arran, Alexander von Boetticher, L. Corner et autres

Laser-driven plasma accelerators operating in a quasi-linear regime require external guiding of the laser driver. We describe our work to develop hydrodynamic optical-field-ionized (HOFI) channels with properties which are well suited to all types of laser-driven plasma accelerator. In this approach a …

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