Self-generated magnetic fields produced by laser bombardment of a solid target
Davis, Larry Joe
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To investigate the phenomena associated with the production of dense plasmas through solid target bombardment by focused laser radiation, procedures relevant to assembly and operation of a high-power plant pulse laser system, laser monitoring techniques, and the experimental arrangement for investigating the properties of a freely expanding plasma were developed. Using magnetic coil probes in the vicinity of the expanding laser-created plasma, signals were detected which indicated the presence of azimuthal magnetic fields. The magnitudes of the observed magnetic fields were as high as 35 Gauss. The dependencies of the self-generated magnetic fields (SGMF) upon background gas pressure, probe position, and applied external fields were investigated. A discussion of possible generation mechanisms in light of the experimental evidence is included.
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