English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Direct studies of intense laser-solid interactions is still of greatchallenges, because of the many coupled physical mechanisms, such as directlaser heating, ionization dynamics, collision among charged particles, andelectrostatic or electromagnetic instabilities, to name just a few. Here, wepresent a full particle-in-cell simulation (PIC) framework, which enables us tocalculate laser-solid interactions in a "first principle" way, covering almost"all" the coupled physical mechanisms. Apart from the mechanisms above, thenumerical self-heating of PIC simulations, which usually appears insolid-density plasmas, is also well controlled by the proposed"layered-density" method. This method can be easily implemented into thestate-of-the-art PIC codes. Especially, the electron heating/acceleration atrelativistically intense laser-solid interactions in the presence of largescale pre-formed plasmas is re-investigated by this PIC code. Results indicatethat collisional damping (even though it is very week) can significantlyinfluence the electron heating/acceleration in front of the target. Furthermorethe Bremsstrahlung radiation will be enhanced by $2\sim3$ times when the solidis dramatically heated and ionized. For the considered case, where laser is ofintensity $10^{20}\ \text{W}/\text{cm}^2$ and pre-plasma in front of the solidtarget is of scale-length $10\ \mu\text{m}$, collision damping coupled withionization dynamics and Bremsstrahlung radiations is shown to lower the"cut-off" electron energy by $25\%$. In addition, the resistive electromagneticfields due to Ohmic-heating also play a non-ignorable role and must be includedin real laser-solid interactions.

Particle-in-cell simulations of laser-plasma interactions at solid densities and relativistic intensities: the role of atomic processes