Journal
PHYSICAL REVIEW LETTERS
Volume 114, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.215001
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Funding
- U.S. DOE by LLNL [DE-AC52-07NA27344]
- LDRD program [12-ERD-062]
- LLNL Lawrence Fellowship
- DOE, through the SLAC LDRD project [DE-AC02-76SF00515]
- [DE-AC02-06CH11357]
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We report new experimental results obtained on three different laser facilities that show directed laser-driven relativistic electron-positron jets with up to 30 times larger yields than previously obtained and a quadratic (similar to E-L(2)) dependence of the positron yield on the laser energy. This favorable scaling stems from a combination of higher energy electrons due to increased laser intensity and the recirculation of MeV electrons in the mm-thick target. Based on this scaling, first principles simulations predict the possibility of using such electron-positron jets, produced at upcoming high-energy laser facilities, to probe the physics of relativistic collisionless shocks in the laboratory.
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