Abstract: The pulsed gas supply consists of a cylindrical gas reservoir which conta a multiplicity of small release ports in a helical pattern and an inner cylindrical rotary valve which also contains a multiplicity of small release ports in the same helical pattern. The reservoir and valve constitute an integral unit which has the advantage of totally balanced forces on a single moving part. This allows for motion free of friction caused by the high pressures of the gas supply.

Abstract: A laser effects simulator having inner and outer cylinders which serve as parate plenums for two gases--a fuel and an oxidizer. Each plenum contains a multiplicity of small release ports or holes. An inner cylinder serves as a combustion chamber. The inner cylinder contains two sets of small release ports or holes arranged to simultaneously match or line up with the multiplicity of ports in the two plenums. Thus, allowing both fuel and oxidizer to be admitted to the combustion chamber and become mixed. On one end of the inner cylinder is an igniter that starts the combustion process. The reaction creates a high temperature mixture which expands to a low density hot gas that simulates the results that are produced when a high energy laser beam interacts with a solid surface.

Abstract: Apparatus for accurately sampling and measuring beam power of a high energy aser beam without blocking or unduly perturbing the beam for phenomenological effects purposes and including a unitary sampling wheel which reflects a portion of the laser beam energy to a primary collecting and focusing mirror which re-reflects the laser beam onto a low level energy detector and a low level power detector for providing accurate and reliable samples through a wide range of frequencies and low amplitude without affecting beam characteristics and further use.

Abstract: Apparatus for accurately sampling and measuring the beam power of a high energy laser beam without blocking or unduly perturbing the beam for phenomenological effects purposes. The beam is accurately and reliably sampled at an acceptable frequency and low amplitude without effecting the beam characteristics for further experimental use.