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Supra-thermal electron beam stopping power and guiding in dense plasmas.
- Source :
-
Journal of Plasma Physics . Aug2013, Vol. 79 Issue 4, p429-435. 7p. - Publication Year :
- 2013
-
Abstract
- Fast-electron beam stopping mechanisms in media ranging from solid to warm dense matter have been investigated experimentally and numerically. Laser-driven fast electrons have been transported through solid Al targets and shock-compressed Al and plastic foam targets. Their propagation has been diagnosed via rear-side optical self-emission and Kα X-rays from tracer layers. Comparison between measurements and simulations shows that the transition from collision-dominated to resistive field-dominated energy loss occurs for a fast-electron current density ~5 × 1011 A cm−2. The respective increases in the stopping power with target density and resistivity have been detected in each regime. Self-guided propagation over 200μm has been observed in radially compressed targets due to ~1kT magnetic fields generated by resistivity gradients at the converging shock front. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00223778
- Volume :
- 79
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of Plasma Physics
- Publication Type :
- Academic Journal
- Accession number :
- 89410757
- Full Text :
- https://doi.org/10.1017/S0022377813000305