Measurements taken of film flow rates at high resolution and repetion rate in the oscillatory regime have revealed some startling new features previously masked by a lack of experimental resolutlon. The oscillations which have alwaye appeared to be ginusokfal are clearly revealed aa periodic but non
Distribution of4He film flow rates
โ Scribed by R.F. Harris-Lowe; R.R. Turkington
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 127 KB
- Volume
- 194-196
- Category
- Article
- ISSN
- 0921-4526
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๐ SIMILAR VOLUMES
Measurements of 4He film flow rates taken with high resolution and rapatltlon rates have revealed a reproducible structure highly correlated wlth the llquld level meniscus posltlon. The details of this structure have been previously masked by a lack of experimental resolution.
Superfluid 3He film flow out of a copper4 beaker was measured without and then with a 'He coating on the copper surface. The effect zf the He was to convert the substrate from a purely diffuse to a purely specular surface for the He quasiparticles.
The design and construction of a still for a dilution refrigerator is described. This device yielded an He3-He 4 ratio of almost 30~2 In addition to its use in a dilution refrigerator the still has been used for He 3 purification, where it proved capable of extracting a high proportion of He 3 from