Physics – Optics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004natur.432.1005k&link_type=abstract
Nature, Volume 432, Issue 7020, pp. 1005-1008 (2004).
Physics
Optics
77
Scientific paper
The development of ultra-intense lasers has facilitated new studies in laboratory astrophysics and high-density nuclear science, including laser fusion. Such research relies on the efficient generation of enormous numbers of high-energy charged particles. For example, laser-matter interactions at petawatt (1015W) power levels can create pulses of MeV electrons with current densities as large as 1012Acm-2. However, the divergence of these particle beams usually reduces the current density to a few times 106Acm-2 at distances of the order of centimetres from the source. The invention of devices that can direct such intense, pulsed energetic beams will revolutionize their applications. Here we report high-conductivity devices consisting of transient plasmas that increase the energy density of MeV electrons generated in laser-matter interactions by more than one order of magnitude. A plasma fibre created on a hollow-cone target guides and collimates electrons in a manner akin to the control of light by an optical fibre and collimator. Such plasma devices hold promise for applications using high energy-density particles and should trigger growth in charged particle optics.
Chen Zi Li
Cowan T. E.
Freeman Richard R.
Fuchs J"urgen
Hatchett Stephen P.
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