期刊
PHYSICAL REVIEW LETTERS
卷 112, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.125001
关键词
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资金
- Office of Science, Office of High Energy Physics, of the U.S. Department of Energy [DE-AC02-05CH11231]
- National Science Foundation [PHY-0935197]
- National Basic Research Program of China [2013CBA01504]
- DOE SCIDAC program COMPASS
A method is proposed to generate femtosecond, ultralow emittance (similar to 10(-8) m rad), electron beams in a laser-plasma accelerator using two lasers of different colors. A long-wavelength pump pulse, with a large ponderomotive force and small peak electric field, excites a wake without fully ionizing a high-Z gas. A short-wavelength injection pulse, with a small ponderomotive force and large peak electric field, copropagating and delayed with respect to the pump laser, ionizes a fraction of the remaining bound electrons at a trapping wake phase, generating an electron beam that is accelerated in the wake.
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