We describe a novel scheme consisting of two deformable bimorph mirrors that can free ultrashort laser pulses from simultaneously present strong wave-front distortions and intensity-profile modulations. This scheme is applied to the Max-Planck-Institut für Quantenoptik 10-TW Advanced Titanium-Sapphire Laser (ATLAS) facility. We demonstrate that with this scheme the focusability of the ATLAS pulses can be improved from 10(18) to 2x10(19) W/cm(2) without any penalty in recompression fidelity.
A high-power Nd : glass laser beam was focused on freely falling deuterium ice pellets. It was demonstrated that this method allows reliable and reproducible production of an isolated deuterium plasma cloud suitable for filling a plasma machine. The plasma with a total ion number of (1–2) ×1017 expands quite uniformly at a velocity of (1–3) ×107 cm/s. However, the pellet is not completely ionized, which is in accordance with theoretical predictions. The greater portion of the pellet disintegrates after the laser shot and expands with a velocity of approximately 1×106 cm/s.
In this paper, we report on a new laser facility
called PALS (Prague Asterix Laser System), which is currently
under construction, and which will house the high-power
iodine laser Asterix IV. Upon its completion in late 1999,
the PALS facility will be capable of providing single-
or multiple-pulse irradiation with a variable pulse duration
ranging from 100 to 500 ps. Wavelengths available will
be 1.315 μm, 658 nm, and 438 nm. The system will provide
one main beam with energy up to 1200 J and two smaller
auxiliary beams with a combined energy of up to 100 J.
A wide variety of geometries and variable pulse timings
is available. We assess PALS' potential for investigating
the physics of laser plasmas in inertial confinement fusion,
the development and applications of X-ray lasers, X-ray
spectroscopy, and radiation transport, using multiple-pulse
and extended beam capability.
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