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Stable laser-plasma accelerators at low densities.
- Source :
- Journal of Applied Physics; 2014, Vol. 116 Issue 4, p043109-1-043109-8, 8p, 10 Graphs
- Publication Year :
- 2014
-
Abstract
- We report stable laser wakefield acceleration using 17-50 TW laser pulses interacting with 4mmlong helium gas jet. The initial laser spot size was relatively large (28 lm) and the plasma densities were 0.48-2.0×10<subscript>19</subscript>cm<superscript>-3</superscript>. High-quality 100-MeV electron beams were generated at the plasma density of 7.5×10<superscript>18</superscript>cm<superscript>-3</superscript>, at which the beam parameters (pointing angle, energy spectrum, charge, and divergence angle) were measured and stabilized. At higher densities, filamentation instability of the laser-plasma interaction was observed and it has led to multiple wakefield accelerated electron beams. The experimental results are supported by 2D particle-in-cell simulations. The achievement presented here is an important step toward the use of laser-driven accelerators in real applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 116
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 97312125
- Full Text :
- https://doi.org/10.1063/1.4891987