Modified helium dewar
โ Scribed by J.M. Goldschvartz
- Publisher
- Elsevier Science
- Year
- 1968
- Tongue
- English
- Weight
- 163 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0011-2275
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
A model has been developed to pred=ct the flow of He II between a source and a rece)vmg dewar The model uses a fimte d=fference approx=mat=on to integrate the descnbmg equat=ons The transfer path may conta)n porous plugs or mechamcal pumps, heater sect)ons, heat leaks, constr=ct=ons due to valves, a
It should be noted that the mesh regenerators used in Reference 1 achieved a minimum temperature not lower than 40 K and a net refrigeration power of ~ 3 W at 77 K. On the contrary, our experimental data have shown that the single stage regenerator, suitably hybridized, can attain minimum temperatur
meter-relay circuits for driving a solenoid operated valve which is situated in the liquid transfer tube. Commercial copper wire at present available is pure enough to obtain an almost linear change in resistance at temperatures down to 60 K with sufficient reproducibility. The resistance at 77 K w