Abstract
ABSTRACT The design, test and optimization of a picosecond CO2 pulse-forming system are presented. The system switches a semiconductor's optical characteristics at 10 1um under the control of a synchronized 1.06-jim Nd:YAG picosecond laser pulse. An energy-efficient version of such a systemusing collimated beams is described. A simple, semi-empirical approach is used to simulate theswitching process, specifically including the spatial distributions of the laser energy and phase,which are relevant for experiments in laser-driven electron acceleration. 1. INTRODUCTION Lasers have been proposed as a tool for electron acceleration since early in their develop- ment. But only with the advent of sufficiently high-power lasers has this idea become feasible, andresearch programs are under way in several laboratories. The Accelerator Test Facility (ATF)1at Brookhaven National Laboratory (BNL) is presently preparing to test three laser-acceleration schemes. In all cases, the laser will interact with a 50 MeV high-brightness e-beam producedby a conventional RF linear accelerator. One program investigates electron acceleration by the
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