Speaker
Description
In High-Repetition-Rate, TNSA-driven laser-plasma interaction, a crucial aspect is given by the reproducibility of sequential shots. Here the role played by different sources of instabilities that can alter ion and proton acceleration in nominally identical conditions is investigated.
The significative improvements in laser technology and in high repetition lasers, allow to investigate involved physical phenomena with much improved statistics, so letting these infrastructure gaining more and more interest.
These kind of lasers are specially suited for testing laser-driven beam acceleration schemes, as for example in Extreme Light Infrastructure facilities. Despite the fact that these infrastructures are now widespread and widely used, a critical point to address is the level of reproducibility that can be obtained in nominally identical shots and, how the stochastic variations of the interaction can affect the spectra of the accelerated ions at different angles.
We present experimental results of proton spectra achieved with both TOF diamond detectors and Thomson spectrometry arranged at different angles with respect to the target normal in the framework of an experimental campaign, at the VEGA III laser at CLPU (Salamanca).
The interaction regime is based on pulses having duration in the order of 220 fs, laser intensities up to $10^{20}$ W $cm^{-2}$ and about 25J energy on solid targets. We show results obtained considering a statistical analysis of a significant number of similar shots.
Acknoledgement:
This work has been carried out within the framework of the EUROfusion Consortium,
funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No. 101052200–EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them.
This work has been carried out within the framework of the COST Action CA21128-PROBONO “PROton BOron Nuclear fusion: from energy production to medical applications”, supported by COST (European Cooperation in Science and Technology-www.cost.eu)."
