Superfluidity and Superconductivity |
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Page 89
... superleaks by de Bruyn Ouboter et al ( 1967 ) . One form of the apparatus is shown in figure 3.4 : the superleak is made by drilling a hole through a brass block and packing it with jeweller's rouge , a fine powder with grain size of ...
... superleaks by de Bruyn Ouboter et al ( 1967 ) . One form of the apparatus is shown in figure 3.4 : the superleak is made by drilling a hole through a brass block and packing it with jeweller's rouge , a fine powder with grain size of ...
Page 92
... superleak , where a critical flow rate is reached which is independent of the pressure head . In order to extend the use of equation ( 3.60 ) into the regime where the superfluid flows at or above the critical rate , it is conventional ...
... superleak , where a critical flow rate is reached which is independent of the pressure head . In order to extend the use of equation ( 3.60 ) into the regime where the superfluid flows at or above the critical rate , it is conventional ...
Page 190
... superleak were investigated by Kojima et al ( 1971 , 1972 ) . The superleak consisted of a toroidal channel , packed with fine powder ( figure 6.15 ( a ) ) , which could be rotated at variable speed . The normal fluid was clamped by its ...
... superleak were investigated by Kojima et al ( 1971 , 1972 ) . The superleak consisted of a toroidal channel , packed with fine powder ( figure 6.15 ( a ) ) , which could be rotated at variable speed . The normal fluid was clamped by its ...
Common terms and phrases
angular velocity applied field atoms axis BCS theory behaviour calculation Chapter chemical potential circulation condensate constant Cooper pair critical field critical temperature critical velocity curl decreases density derived difference discussion dissipation electrons energy gap entropy equation equilibrium excitations experiments Fermi surface film fluctuation flux creep flux lines free energy frequency given gives gradient helium increases interaction Josephson effect lattice Lett liquid ³He magnetic field magnetisation curve measured metal microscopic theory microwave minimise momentum motion neutron normal fluid order parameter oscillations phase transition phonon Phys pressure quantisation quantum quasiparticle radius region rotation roton scattering shown in figure shows Solid specific heat specimen spectrum spin spin triplet supercurrent superflow superfluid superfluid flow superfluid velocity superleak T₁ temperature dependence thermal thermodynamic tunnelling type II superconductor v₁ variation vector viscosity voltage vortex core vortex lines vortices wave function zero