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Piezospectroscopic measurement of high-frequency vibrations in a pulse-tube cryostat.
- Source :
- Review of Scientific Instruments; Mar2019, Vol. 90 Issue 3, pN.PAG-N.PAG, 9p, 1 Diagram, 1 Chart, 7 Graphs
- Publication Year :
- 2019
-
Abstract
- Vibrations in cryocoolers are a recurrent concern to the end user. They appear in different parts of the acoustic spectrum depending on the refrigerator type, Gifford McMahon or pulse-tube, and with a variable coupling strength to the physical system under interest. Here, we use the piezospectroscopic effect in rare-earth doped crystals at a low temperature as a high resolution, contact-less probe for the vibrations. With this optical spectroscopic technique, we obtain and analyze the vibration spectrum up to 700 kHz of a 2 kW pulse-tube cooler. We attempt an absolute calibration based on known experimental parameters to make our method partially quantitative and to provide a possible comparison with other well-established techniques. [ABSTRACT FROM AUTHOR]
- Subjects :
- CRYOSTATS
CRYSTALS
RANDOM vibration
LIQUID helium
MICROWAVE oscillators
Subjects
Details
- Language :
- English
- ISSN :
- 00346748
- Volume :
- 90
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Review of Scientific Instruments
- Publication Type :
- Academic Journal
- Accession number :
- 135642843
- Full Text :
- https://doi.org/10.1063/1.5080086