The viscometer used for low viscosity dilute 3He in 4He liquid samples consisted of a 0,84 mm diameter epoxy rod glued to the center of a 36.7 μm diameter manganin wire. The overall height was 8 mm with a distance of 6 mm between the two legs. This design was sufficiently large that the wire interacts hydrodynamically with the quasiparticle gas down to 1 mK.
Images & Sample Data
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Akimoto, H., et al, New Evidence for Zero-Temperature Relaxation in Spin-Polarized Fermi Liquid, Phys. Rev. Lett., 90, 105301-105304 (2003)
Akimoto, H., et al, Giant viscosity enhancement in a spin-polarized Fermi liquid, Phys. Rev. Lett., 99, 095301 (2007)
Akimoto, H., et al, Spin Transport in Very Dilute 3He -4He at Very High B/T, J. Low Temp. Phys., 126, 109 (2002)