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An electronic controller for an electromechanical shutter is described. The synchronization pulse output from a thyratron-triggered pulsed laser is used to keep the shutter open and to unblock the optical path followed by the laser beam for specific selected laser pulses. Effectively, ultralow repetition rates down to 0.001 Hz are obtained when the pulsed laser is operated at normal repetition rates between 0.5 and 2 Hz.
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Viswanathan et al. (1985) studied this question.
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