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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Nishimura, T. Low, F. Shivanandan, K. |
| Copyright Year | 1965 |
| Abstract | Two types of superconducting electromagnetic actuators-linear and angular-for precise control of Fabry-Perot spectrometer etalons at liquid helium temperature were manufactured and tested successfully. The linear displacement unit (45 Newtons/Amp) has maximum travel of ±44 um with off-axis deviation of less than 1.5 arcseconds for 15 um path. The angular unit has maximum tilt of ± 8 arcminutes and can maintain parallelism of Two etalons to better than 0.3 arcsecond of angle by compensating the differential contraction upon coaling and off-axis deviation of the linear displacement unit. These actuators are proving especially useful in low temperature infrared instrumentation where other choices, such as piezoelectric crystals, fail and where essentially zero power dissipation permits low infrared backgrounds to be maintained along with long cryogenic lifetimes. |
| Sponsorship | IEEE Magnetics Society |
| Starting Page | 451 |
| Ending Page | 454 |
| Page Count | 4 |
| File Size | 458027 |
| File Format | |
| ISSN | 00189464 |
| Volume Number | 21 |
| Issue Number | 2 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1985-03-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Fabry-Perot interferometers Superconducting photodetectors Temperature control Spectroscopy Manufacturing Testing Piezoelectric actuators Instruments Crystals |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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