期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.105003
关键词
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资金
- Department of Energy [DE-AC52-07NA27344, DE-FG03-92ER40727, DE-FG02-92ER40727, DE-FC02-07ER41500, DE-FG52-09NA29552]
- NSF [PHY-0936266, PHY-0904039]
- FCT, Portugal [SFRH/BD/35749/2007]
- Laboratory Directed Research and Development Program [08-LW-070]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/35749/2007] Funding Source: FCT
- Direct For Mathematical & Physical Scien [GRANTS:13904385] Funding Source: National Science Foundation
- Division Of Physics [GRANTS:13904385] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [0904039] Funding Source: National Science Foundation
The concepts of matched-beam, self-guided laser propagation and ionization-induced injection have been combined to accelerate electrons up to 1.45 GeV energy in a laser wakefield accelerator. From the spatial and spectral content of the laser light exiting the plasma, we infer that the 60 fs, 110 TW laser pulse is guided and excites a wake over the entire 1.3 cm length of the gas cell at densities below 1.5 x 10(18) cm(-3). High-energy electrons are observed only when small (3%) amounts of CO2 gas are added to the He gas. Computer simulations confirm that it is the K-shell electrons of oxygen that are ionized and injected into the wake and accelerated to beyond 1 GeV energy.
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