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An optical heterodyne interferometer has been combined with a helium flow cryostat to measure the linear thermal expansion coefficient of solids at cryogenic temperatures. The absolute accuracy in length measurement is within a few nanometres. Measurement results in the temperature range 6-273 K are presented and compared with some literature data.
Details
- Original title: Laser interferometric dilatometer at low temperatures: application to fused silica SRM 739.
- Record ID : 1996-3220
- Languages: English
- Source: Cryogenics - vol. 35 - n. 12
- Publication date: 1995/12
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CRYOSTAT FOR MECHANICAL TESTING OF MATERIALS AT...
- Author(s) : VALSAKUMAR M. C., KANNAN N., RADHAKRISHNAN T. S.
- Date : 1982
- Languages : English
- Source: Indian J. Cryog. - vol. 7 - n. 4
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DENSITY AND POLARIZABILITY OF LIQUID HELIUM 4.
- Author(s) : KEMPIN'SKI V.
- Date : 1988
- Languages : Russian
- Source: Fiz. nizk. Temp. - vol. 14 - n. 5
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- Author(s) : DAS S. R., DUTTA P. K.
- Date : 1991/02
- Languages : English
- Source: Indian J. pure appl. Phys. - vol. 29 - n. 2
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- Author(s) : SCHMIDT C.
- Date : 1988
- Languages : English
- Source: Cryogenics - vol. 28 - n. 9
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- Author(s) : JUHAS M. C., DUNCAN D. B., STREIT R. D.
- Date : 1983
- Languages : English
- Source: Cryogenics - vol. 23 - n. 11
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