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Contours of the plasma electron density at the peak of the laser pulse for planar (top) and spherical target (bottom) for (a) 150 and (b) laser spot size plasma. The contour lines correspond to values of (a) 19.4–17.6 and (b) 19.8–18.4 in 0.1 increments.
Simulations of the HVM (dashed lines) and metrology (solid lines) electron density (blue), electron temperature (black) and normalized laser absorption (red) along the laser axis at the peak of the laser pulse.
Normalized experimental time-resolved HVM laser pulse (solid black), HVM EUV emission (dashed black), metrology laser pulse (solid red), and metrology in-band EUV emission (dashed red).
Normalized time-integrated EUV emission images for a Sn LPP with spot size of (a) 150 and (b) . Also plotted are horizontal lines (black) corresponding to twice the width of the laser focal spot size.
CE and plasma scale lengths for difference focal spot size and target geometry combinations.
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