A novel multi-shot target platform for laser-driven laboratory astrophysics experiments

Abstract

A new approach to target development for laboratory astrophysics experiments at high power laser facilities is presented. With the dawn of high power lasers, laboratory astrophysics emerged as a field, bringing insight into physical processes in astrophysical objects, such as formation of stars. An important factor for success on these experiments is targetry. To date, targets have mainly relied on expensive and challenging microfabrication methods. The design presented incorporates replaceable machined parts which assemble into a structure that defines the experimental geometry. This can make targets cheaper and faster to manufacture, while maintaining robustness and reproducibility. The platform is intended for experiments on plasma flows, but it is flexible and may be adapted to the constraints of other experimental setups. Examples of targets used in experimental campaigns are shown, including a design for insertion in a high magnetic field coil. Experimental results are included demonstrating the performance of the targets.

Theoretical analysis of frequency modulation-to-amplitude modulation on the final optics and target of the SG II-Up laser facility

“…In order to optimize the laser-target interaction in inertial confinement fusion (ICF) [1,2] , it is necessary to have precise control over the time-power curve and uniformity of each laser beam on the target. One of the technical challenges in time-power curve control is suppressing frequency modulation (FM)-to-amplitude modulation (AM) [3][4][5] .…”