Abstract

When operating with linear low-pressure flashlamps (0.1–20 Torr) two different linear zones of the Eout/Ein characteristics are described: high-energy density zone corresponds with a wall-ablation regime having a strong influence from the material extracted from the walls; low-energy density zone corresponds with an isolated normal discharge regime. Spectroscopic measurements also demonstrate this behavior. The input energy density needed for the regime transition is constant when varying tube geometry. Pyrex and quartz tubes with 10-μsec pulses; the value of Etransition was ∼38 J/cm3 at 5-Torr air pressure.

© 1985 Optical Society of America

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