3-ps synchronized multiframe photographic diagnostic for target experiments with the iodine laser

Abstract

Atomic and molecular emissions of the laser-induced plasma during zinc and zinc oxide target ablation

Parametric amplification as a single-shot time-resolved off-harmonic probe for laser–matter interactions

“…Therefore, a large variety of multi-frame probing techniques has been investigated and reported in the literature. Most of them employ replicas of a single probe pulse with fundamental or harmonic frequencies which are separated spatially [5][6][7] , spectrally [8] , and/or by polarization states [9] in order to generate delay between several probe pulses. Nevertheless, these solutions can suffer from strong plasma self-emission at fundamental and harmonic frequencies and on-target laser scattering, which can be much stronger than the optical probe and saturate the detector thus covering the phase information accumulated by the probe beam.…”

“…Furthermore, although off-harmonic probes efficiently limit plasma self-emission, they do not directly provide a time-delayed sequence of images related to a single laser shot. Conventional beam splitting techniques (for example, using the approaches described in the literature [5][6][7]9] ) or advanced ultrafast imaging methods (using space, angle or spatial frequency division [16] ) need to be applied to these off-harmonic probes to capture the plasma dynamics within a single shot.…”

A four-channel TEA N2laser controlled by a multistage spark gap

“…The generation of time sequenced short N, laser pulses [l-51 provides a useful tool for the multiframe optical diagnostics of the fast dynamics in 2-pinch, plasma focus and laser produced plasmas. Although better temporal resolution and framing rate could be obtained by using optically delayed picosecond dye laser pulses [6], the relative simplicity in the construction and the cost effectiveness of a multichannel nanosecond TEA N, laser provides a good alternative for setting up a time sequenced multiframe imaging system [ 1-41, This article presents a four-channel TEA N, laser in which a single multistage spark gap is used to control the delays between the successive laser pulses from over 100 ns down to as low as 5 ns. One of the main advantages of this design is that the laser pulse jitters are unaffected by the jitter arising from the slow ignition pulse of the multistage spark gap.…”

Optical and X-Ray Shadowgraphy of Laser-Heated Cavities

“…The 6-frame optical set-up based on a 3 ps, h = O. *% pm dye laser pulse was described earlier [5]. X-ray shadowgrams were obtained using the lw radiation of the iodine laser both for the backlighter and the heating laser beam.…”