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Measurement results on CdS ultrasonic amplifiers which were operated with continuous drift fields at room temperature are presented. A material gain of 26 dB was obtained for a 200-MHz transverse-wave signal. Comparisons are made with pulsed-field data obtained from the same samples. The presence of saturation-level ultrasonic flux significantly reduces the maximum gain obtainable under continuous operation.
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Charles Krischer (1969) studied this question.
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