The electron density distribution diagrams generated by the interaction of the petawatt laser with nitrogen gas jets for various nitrogen gas jet pressures at time instant 1000 fs. (IMAGE)

Nuclear Science and Techniques

The electron density distribution diagrams generated by the interaction of the petawatt laser with nitrogen gas jets for various nitrogen gas jet pressures at time instant 1000 fs.

Caption

To further reveal the physical processes of petawatt laser ablation on nitrogen gas jets, based on the 2D PIC software EPOCH. Simulations show how plasma channel structures evolve under different gas jet pressures, affecting the self-focusing and acceleration of electrons. 2D simulations reveal plasma channel elongation at 2.15 MPa, maximizing electron trapping and acceleration. At 3.15 MPa, channel contraction due to defocusing reduces electron yield.

Credit

Zhi-Gang Deng

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License

CC BY-NC

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