Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Vortex nucleation in He II : an interesting distinction between the intrinsic and thermally activated nucleation mechanisms.
AU - Nancolas, G. G.
AU - Bowley, R. M.
AU - McClintock, Peter V. E.
PY - 1996/1/20
Y1 - 1996/1/20
N2 - The drift velocity of negative ions in He II, moving under the influence of electric fields large enough to quench the production of charged vortex rings, has been measured for a wide range of pressures and temperatures. It is found that, although the intrinsic (temperature-independent) vortex nucleation mechanism provides a major source of momentum loss, particularly at low pressures, the corresponding effect for the thermally activated (temperature-dependent) mechanism is immeasurably small. The underlying physical reasons for this interesting distinction remain unknown but some possible explanations are discussed.
AB - The drift velocity of negative ions in He II, moving under the influence of electric fields large enough to quench the production of charged vortex rings, has been measured for a wide range of pressures and temperatures. It is found that, although the intrinsic (temperature-independent) vortex nucleation mechanism provides a major source of momentum loss, particularly at low pressures, the corresponding effect for the thermally activated (temperature-dependent) mechanism is immeasurably small. The underlying physical reasons for this interesting distinction remain unknown but some possible explanations are discussed.
U2 - 10.1088/0022-3719/19/2/002
DO - 10.1088/0022-3719/19/2/002
M3 - Journal article
VL - 19
SP - L37-L41
JO - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
SN - 0953-8984
IS - 2
ER -