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James A. Van Allen journal, October 1955-March 1958
Page 24
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sample of water (about one quart) polarized initially at ~400 gauss). Demonstrated validity by (a) with and without water (b) Turning coil transverse (parallel?) to earth's field (c) bringing up a small magnet. Expected frequency ~2500 c.p.s. Roughly confirmed but not measured yet. Amplifier noise level ~0.5 µv equivalent input. ------------------ Next move try to reduce noise level, rig up a recording scheme (probably just a high speed camera ~ 60 inches/second) and make a telemetered balloon flight.
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sample of water (about one quart) polarized initially at ~400 gauss). Demonstrated validity by (a) with and without water (b) Turning coil transverse (parallel?) to earth's field (c) bringing up a small magnet. Expected frequency ~2500 c.p.s. Roughly confirmed but not measured yet. Amplifier noise level ~0.5 µv equivalent input. ------------------ Next move try to reduce noise level, rig up a recording scheme (probably just a high speed camera ~ 60 inches/second) and make a telemetered balloon flight.
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