Pulsed power supplies for laser flashlamps. Final report

Abstract

The University of Texas at Austin as an account of work sponsored by the Lawrence Livermore Laboratory (LLL) under subcontract No. 1823209. Neither LLL, members of LLL, The University of Texas, nor any persons acting on behalf of either: (a) makes any warranty or representation, express or implied, with respect to the accuracy, completeness, or usefulness of the information contained in this report, or that the use of any information, apparatus, method or process disclosed in this report may not infringe privately owned rights; or (b) assumes any liabilities with respect to the use of, or for damages resulting from the use of, any information, apparatus, method, or process disclosed in this report. ABSTRACT A preliminary engineering design of a compensated pulsed alternator for driving laser flashlanps is presented. The work performed by the Center for Electromechanics at The University of Texas at Austin also includes the optimization and revision of the prototype design for a compensated pulsed alternator power supply for the NOVA laser system at Lawrence Livermore Laboratory, BIRD UT-CEM LLL 11-30-78 96 15mm x M2cr

Simulation of the active compensated pulsed alternator with a laser flashlamp load based on simplified model

“…They are: (1) the initial streamer breakdown and arc growth to full bore and (2) the lamp current buildup and decay at full bore. The energy cost of phase(1) is less than 1% of that of phase(2) [3].That's to say that almost all of the energy supplied by ACPA is delivered in phase (2).In other words, the influence of phase(1) is slight.…”

“…However, as a special resistive load, the laser flashlamp requires that the source to deliver tens of kilo-joules of energy in hundreds of micro seconds (400 s  -600 s  ) [3]. In other words, the pulse width and amplitude of the CPA output current have to meet the requirement of the flashlamp load.…”

Simulation of Active Compensated Pulsed Alternator with a Laser Flashlamp Load Based on Simplified Model

“…They are: (1) the initial streamer breakdown and arc growth to full bore, and (2) the lamp current buildup and decay at full bore. The energy cost of phase (1) is less than 1% of that of phase (2) [3].That's to say that almost all of theenergy supplied by the ACPA is delivered in phase (2). In other words, the influence of phase(1) is slight.…”

“…However, as a special resistive load, the laser flashlamp requires that the source to deliver tens of kilojoules of energy in hundreds of microseconds (400 s  -600 s  ) [3]. In other words, the pulse width and amplitude of the CPA output current have to meet the requirements of the flashlamp load.…”