Shape of Pulses of Radio-frequency Radiation from the Sun

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DURING some 400 hours observations of solar radiation on 75 Mc./s., the variation of the second detector anode current was recorded with a portable vibration galvanometer tuned to resonance at about 45 c./s. and damped less than critically, but so that the spot became stationary after sudden deflexions in less than 0·25 sec. Records were taken on 35-mm. film moving 12·1 mm./min. The gain was adjusted so that the current due to noise generated in the receiver was about 15 per cent of the maximum allowable, to avoid distortion in all but exceptional cases.

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WILLIAMS, S. Shape of Pulses of Radio-frequency Radiation from the Sun. Nature 162, 108 (1948) doi:10.1038/162108a0

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