The region of interaction between a focused 1 GW ruby laser beam and a plane beryllium target has been observed end-on with a high resolution stigmatic grazing incidence spectrograph. The profile of the Lyα line of BeIV is made up of two components : a broad asymmetric one, spatially corresponding to the radiation emitted by the high density ablation region and a narrow one superimposed, emitted by the expanding plasma. A model that solves the radiative transfer equation for a moving plasma with adjustable parameters reproduces very well the observed features. It is then possible to determine a unique and realistic set of plasma parameters in good agreement with previous independent observations.
Parameters of a Laser-Produced Plasma from XUV Line Profiles
NICOLOSI, PIERGIORGIO;TONDELLO, GIUSEPPE
1982
Abstract
The region of interaction between a focused 1 GW ruby laser beam and a plane beryllium target has been observed end-on with a high resolution stigmatic grazing incidence spectrograph. The profile of the Lyα line of BeIV is made up of two components : a broad asymmetric one, spatially corresponding to the radiation emitted by the high density ablation region and a narrow one superimposed, emitted by the expanding plasma. A model that solves the radiative transfer equation for a moving plasma with adjustable parameters reproduces very well the observed features. It is then possible to determine a unique and realistic set of plasma parameters in good agreement with previous independent observations.Pubblicazioni consigliate
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