Description
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A scaling study of short-pulse laser-driven proton and electron acceleration was conducted as a function of pulse duration, laser energy, and laser intensity in the multi-picosecond (ps) regime (∼0.8 ps–20 ps). Maximum proton energies significantly greater than established scaling laws were observed, consistent with observations at other multi-ps laser facilities. In addition, maximum proton energies and electron temperatures in this regime were found to be strongly dependent on the laser pulse duration and preplasma conditions. A modified proton scaling model is presented that is able to better represent the accelerated proton characteristics in this multi-ps regime.
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Keyword
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electron acceleration, laser facilities, laser intensities, laser pulse duration, laser-driven electrons, picosecond regime, proton acceleration, short-pulse lasers |
Notes
| PSFC REPORT PSFC/JA-21-52
The authors would also like to thank Alex Haid at General Atomics for his work in assembling the targets used in this experiment under NNSA Contract No. DE-NA0001808. This work was completed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract No. DE-AC52–07NA27344 with funding support from the Laboratory Directed Research and Development Program under tracking code 17-ERD-039 and 20-ERD-048, the DOE Office of Science Early Career Research Program under No. SCW1651, and the Department of Energy National Nuclear Security Administration Laboratory Residency Graduate Fellowship program, which is provided under Grant No. DE-NA0003864.
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