Tailored mesoscopic plasma accelerates electrons exploiting parametric instability

Author:

Kumar Rakesh YORCID,Sabui RatulORCID,Gopal RORCID,Li Feiyu,Sarkar Soubhik,Trickey WilliamORCID,Anand M,Pasley JohnORCID,Sheng Z-M,Trines R M G MORCID,Scott R H H,Robinson A P LORCID,Sharma VORCID,Krishnamurthy MORCID

Abstract

Abstract Laser plasma electron acceleration from the interaction of an intense femtosecond laser pulse with an isolated microparticle surrounded by a low-density gas is studied here. Experiments presented here show that optimized plasma tailoring by introducing a pre-pulse boosts parametric instabilities to produce MeV electron energies and generates electron temperatures as large as 200 keV with the total charge being as high as 350 fC/shot/sr, even at a laser intensity of a few times 1016 Wcm−2. Corroborated by particle-in-cell simulations, these measurements reveal that two plasmon decay in the vicinity of the microparticle is the main contributor to hot electron generation.

Funder

DAE

Scheme for Promotion of Academic and Research Collaboration

DST-SRC-OI

Publisher

IOP Publishing

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