Abstract

Experiments have been conducted in support of a program to develop ground to orbit laser propulsion.¹ Optical diagnostics provide temporally and spatially resolved measurements of temperature, opacity, and electron density in laser-induced plasmas for various candidate propellants. Plasma ignition thresholds are determined spectroscopically. Mass loss and impulse coupling measurements have been obtained for various propellants in irradiance regimes appropriate to double-pulse detonation wave rockets driven by a ground-based repetitively pulsed IR laser. Experiments have used two 10-J CO₂ TEA lasers. Plans for tests at up to 2 kJ/pulse are also discussed.

© 1988 Optical Society of America