Abstract
A superconducting quantum interference device (SQUID)-based displacement sensor with resolution up to 3*10/sup -15/ m/ square root Hz in the frequency band of 20 Hz-15 kHz is reported. The sensor monitors the Doppler modulation of gamma radiation in a gravitational red-shift experiment using the 93-keV Mossbauer resonance of /sup 67/Zn. Test results for the SQUID and the PZT transducer used in the experiment are presented. The relative statistical uncertainty in the determination of the gravitational red shift is about 3% for a one-week experiment. Preliminary results obtained with the displacement sensor show that the systematic uncertainties that are related to the Doppler motion generated by the velocity drive are negligible compared to the statistical uncertainty.
Original language | English |
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Title of host publication | CPEM'90 Digest |
Subtitle of host publication | Conference on Precision Electromagnetic Measurements |
Editors | Gary R. Hanes |
Place of Publication | New York |
Publisher | IEEE Institute of Electrical and Electronic Engineers |
Pages | 204-205 |
DOIs | |
Publication status | Published - 1990 |
MoE publication type | A4 Article in a conference publication |
Event | CPEM'90: Conference on Precision Electromagnetic Measurements - Ottawa, Canada Duration: 11 Jul 1990 → 14 Jul 1990 |
Conference
Conference | CPEM'90 |
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Country/Territory | Canada |
City | Ottawa |
Period | 11/07/90 → 14/07/90 |