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Propagation of an ultrashort, high-intensity laser pulse in gas-target plasma.
- Source :
-
Journal of Plasma Physics . Aug2012, Vol. 78 Issue 4, p483-489. 7p. - Publication Year :
- 2012
-
Abstract
- For high-energy gain of electron acceleration by a laser wakefield, a stable or guiding propagation of an ultrashort, high-intensity laser pulse in a gas-target plasma is of fundamental importance. Preliminary experiments were carried out for the propagation of 30-fs, ~100-TW laser pulses of intensities ~1019W/cm2 in plasma of densities ~1019/cm3. Self-guiding length of nearly 1.4 mm was observed in a gas jet and 15 mm in a hydrogen-filled capillary. Fluid-dynamics simulations are used to characterize the two types of gas targets. Particle-in-cell simulations indicate that in the plasma, after the pulse's evolution of self-focusing and over-focusing, the high-intensity pulse could be stably guided with a beam radius close to the plasma wavelength. At lower plasma densities, a preformed plasma channel of a parabolic density profile matched to the laser spot size would be efficient for guiding the pulse. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00223778
- Volume :
- 78
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of Plasma Physics
- Publication Type :
- Academic Journal
- Accession number :
- 79388384
- Full Text :
- https://doi.org/10.1017/S0022377812000505