Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
69 (1991), S. 1231-1236
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Electron impact excitation in the edge region of the MT-1 tokamak was used to measure the velocity distribution of a sodium laser blow-off beam in a single shot. The different dependencies of the propagation velocity of the blow-off neutral beam on the laser fluence at different sodium layer thicknesses reveal different regimes of the blow-off process. In the case of thick targets laser ablation is the main accelerating mechanism giving a v∼I1/3 dependence. Thin targets, however, burn through during the laser pulse, and simple thermal heating process results in v∼I1/2 in good agreement with the experiments.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.347308
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