Journal
OPTICS LETTERS
Volume 43, Issue 5, Pages 1131-1134Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.43.001131
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Funding
- Air Force Office of Scientific Research (AFOSR) [FA95501610121, FA95501610284]
- U.S. Department of Energy (DOE) [DESC0015516]
- National Science Foundation (NSF) [PHY1619582]
- U.S. Department of Homeland Security (DHS) [2016DN077ARI104]
- National Nuclear Security Administration (NNSA) [DE-NA0002135]
- Austrian Science Fund (FWF) [P27491, P26658]
- U.S. Department of Defense (DOD) [FA95501610284, FA95501610121] Funding Source: U.S. Department of Defense (DOD)
- Direct For Mathematical & Physical Scien
- Division Of Physics [1619582] Funding Source: National Science Foundation
- Austrian Science Fund (FWF) [P26658] Funding Source: Austrian Science Fund (FWF)
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We report on, to the best of our knowledge, the first results of laser plasma wakefield acceleration driven by ultrashort mid-infrared (IR) laser pulses (lambda = 3.9 mu m, 100 fs, 0.25 TW), which enable near-and above-critical density interactions with moderate-density gas jets. Relativistic electron acceleration up to similar to 12 MeV occurs when the jet width exceeds the threshold scale length for relativistic self-focusing. We present scaling trends in the accelerated beam profiles, charge, and spectra, which are supported by particle-in-cell simulations and time-resolved images of the interaction. For similarly scaled conditions, we observe significant increases in the accelerated charge, compared to previous experiments with near-infrared (lambda = 800 nm) pulses. (c) 2018 Optical Society of America
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