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

Raman and Brillouin amplification of laser pulses in plasma have been shownto produce picosecond pulses of petawatt power. In previous studies,filamentation of the probe pulse has been identified as the biggest threat tothe amplification process, especially for Brillouin amplification, whichemploys the highest plasma densities. Therefore it has been proposed to performBrillouin scattering at densities below $n_{cr}/4$ to reduce the influence offilamentation. However, parastic Raman scattering can become a problem at suchdensities, contrary to densities above $n_{cr}/4$, where it is suppressed. Inthis paper, we investigate the influence of parasitic Raman scattering onBrillouin amplification at densities below $n_{cr}/4$. We expose the specificproblems posed by both Raman backward and forward scattering, and how bothtypes of scattering can be mitigated, leading to an increased performance ofthe Brillouin amplification process.

Boosting the performance of Brillouin amplification at sub-quarter-critical densities via reduction of parasitic Raman scattering