Open-shutter photo of a laser plasma.
Schematics of the streak diagnostics setup (plant view). The probing beam is the green harmonic of the YAG laser. Key: , harmonic separator; , attenuator; , beam expander; , retroreflector.
Simplified setup for deflectometry using the interference filter.
Horizontal streak image (negative).
Probing beam deflection ( plot) as a function of time. (From a scan of the photo in Fig. 4.) is the plasma onset time. The deflection is measured from the center of the plasma.
Schematics and parameters of the beam deflection.
Calculation of the refractive index from Figs. 4 and 5.
Streak photography (negative) of the probe beam and the plasma. The IR beam is incident from the right.
plot from the photo in Fig. 8. is the plasma onset time. The deflection is measured from the focus.
Index of refraction as a function of time calculated from Figs. 8 and 9.
Streak of the plasma and five probing beams. The main IR beam is incident from the left while the five probes emerge from the page.
Deviation of the probing beams for the case when they are delayed respect to the IR beam. Left panel: plasma and probing beam streaks; right panel: streak of the probing beams alone.
Frames of the probing beam taken at (a) , (b) , and (c) difference between them.
Electric susceptibility (dashed line) and refractive index (solid line) as a function of time for two different focal lengths (5 and ) of the plasma-producing lens. corresponds to the time the plasma appears.
Representative results from streak experiments. The positions are relative to the focal point’s position. Key: , vertical; , horizontal.
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