An Intense Microsecond Flash Lamp

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Abstract
A flash lamp system for flash photolysis is described which produces an intense flash of short duration and little afterglow. The discharge takes place in the space formed by placing a solid quartz rod on the axis of a cylindrical quartz tube. When the system dissipates 600 J of electrical energy, it produces a flash in xenon, at 25 Torr, which has a width of 0.9 μsec at half‐height and the afterglow decays to less than 1% of its maximum value within 4.4 μsec from the start of the flash. By surrounding the lamps with a filter solution, noise generated by standing waves in the cell can be eliminated. Methods for eliminating other types of noise are presented.

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