To study the load plasma parameters and structure of the imploded loads, a set of crystal spectrographs with spatial resolution and high luminosity have been used, including a focusing spectrograph with spatial resolution (FSSR) with a spherical mica crystal and the extreme luminosity imaging conical spectrograph (ELICS) with a conical mica crystal.
SpectrographsThe main features and characteristics of the spectrographs used are described below.
|Flat||KAP||~100 µm slit||~0.5-1|
|Convex||Mica||100-200 µm slit||~0.3-1|
|ELICS, conical||Mica||50 µm||0.5|
Examples of spectra obtained with the FSSR for two different current pulses, one with 1 MA peak current and 100 ns rise time (0 to peak), and the other with 850 kA peak current and 150 ns rise time, are shown in this figure. The spectra show significant difference in the imploded array morphology,especially the bright spot structure.