1. Supra-thermal electron beam stopping power and guiding in dense plasmas.
- Author
-
SANTOS, JOÃO JORGE, BATANI, D., BATON, S. D., BEG, F. N., CECCOTTI, T., DEBAYLE, A., DORCHIES, F., FEUGEAS, J.-L., FOURMENT, C., GREMILLET, L., HONRUBIA, J. J., HULIN, S., MORACE, A., NICOLAÏ, P., PÉREZ, F., SAWADA, H., SCHLENVOIGT, H.-P., TIKHONCHUK, V. T., VAISSEAU, X., and VAUZOUR, B.
- Subjects
THERMAL electrons ,ELECTRON beams ,DENSE plasmas ,PHYSICS experiments ,PLASTIC foams ,OPTICAL self-focusing ,CURRENT density (Electromagnetism) - 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]
- Published
- 2013
- Full Text
- View/download PDF