Learn More
Acknowledgements ii 1: Introduction 1 1.1: The funding landscape 1 1.2: The benefits of fusion as an energy source 1 2: What is fusion? The basic physics 3 2.1: Tokamaks: a technical explanation 4 3: The quest for fusion: a history 6 3.1: Achievements of the large tokamaks 6 3.2: The International Thermonuclear Experimental Reactor 7 4: Unconventional(More)
Experimental data [F. N. Beg, Phys. Plasmas 4, 447 (1997)10.1063/1.872103] indicate that for intense short-pulse laser-solid interactions at intensities up to 5 x 10(18) W cm(-2) the hot-electron temperature proportional, variant(Ilambda(2)) (1/3). A fully relativistic analytic model based on energy and momentum conservation laws for the laser interaction(More)
Huge magnetic fields are predicted to exist in the high-density region of plasmas produced during intense laser-matter interaction, near the critical-density surface where most laser absorption occurs, but until now these fields have never been measured. By using pulses focused to extreme intensities to investigate laser-plasma interactions, we have been(More)
We study the nonlinear evolution of the resistive tearing mode in slab geometry in two dimensions. We show that, in the strongly driven regime (large delta'), a collapse of the X point occurs once the island width exceeds a certain critical value approximately 1/delta'. A current sheet is formed and the reconnection is exponential in time with a growth rate(More)
We present measurements of a magnetic reconnection in a plasma created by two laser beams (1 ns pulse duration, 1 x 10(15) W cm(-2)) focused in close proximity on a planar solid target. Simultaneous optical probing and proton grid deflectometry reveal two high velocity, collimated outflowing jets and 0.7-1.3 MG magnetic fields at the focal spot edges.(More)
We report measurements of ultrahigh magnetic fields produced during intense ( approximately 10(20) Wcm(-2) micro m(2) ) laser interaction experiments with solids. We show that polarization measurements of high-order vuv laser harmonics generated during the interaction (up to the 15th order) suggest the existence of magnetic field strengths of 0.7+/-0.1 GG(More)
Acknowledgements ii 1: Introduction 1 1.1: The funding landscape 1 1.2: The benefits of fusion as an energy source 1 2: What is fusion? The basic physics 3 2.1: Tokamaks: a technical explanation 4 3: The quest for fusion: a history 6 3.1: Achievements of the large tokamaks 6 3.2: The International Thermonuclear Experimental Reactor 7 4: Unconventional(More)
We present first results of astrophysically relevant experiments where highly supersonic plasma jets are generated via conically convergent flows. The convergent flows are created by electrodynamic acceleration of plasma in a conical array of fine metallic wires (a modification of the wire array Z-pinch). Stagnation of plasma flow on the axis of symmetry(More)
Experiments where a laser-generated proton beam is used to probe the megagauss strength self-generated magnetic fields from a nanosecond laser interaction with an aluminum target are presented. At intensities of 10(15)   W  cm(-2) and under conditions of significant fast electron production and strong heat fluxes, the electron mean-free-path is long(More)
In circularly polarized light the spins of the photons are aligned. When a short intense pulse of circularly polarized laser light is absorbed by a plasma, a torque is delivered initially to the electron species, resulting primarily in an opposing torque from an induced azimuthal electric field. This electric field, in general, has a curl and leads to the(More)