Initial studies of a linear motor for generating quantum turbulence in He-II with a drawn grid
Initial studies of a linear motor for generating quantum turbulence in He-II with a drawn grid
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用于在 He-II 中产生量子湍流的直线电机绘制网格的初步研究
DOI:
10.1088/1742-6596/150/1/012014
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
Giltrow M
中科院分区:
文献类型:
--
作者:
Giltrow M
Studies of quantum turbulence (QT) require a means of generating well-characterised QT. For systems containing negligible normal fluid density this must be achieved without simultaneously introducing extraneous heating due, for example, to friction between mechanical components. Methods relying on oscillating objects produce negligible extraneous heating, but suffer from the disadvantages of both spatially and temporally nonuniform velocity. In addition, the vibrating grid goes back and forth through the QT it has itself created. Hence the characteristic length scale is subject to uncertainty. We are therefore developing a one-dimensional linear motor to draw a grid steadily, once, through He-II at mK temperatures. Frictionless magnetic bearings are used to levitate the moving elements in contrast to other designs, precluding mechanical dissipation. Details of the design and of the initial tests, and a quantitative comparison of theoretical and actual cryogenic performance, will be presented and discussed.
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DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
G. Ihas;G. Labbé;S. C. Liu;K. Thompson
通讯作者:
K. Thompson
DOI:
10.1103/physreve.74.036307
发表时间:
2006
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
D. Charalambous;L. Skrbek;P. C. Hendry;P. McClintock;W. Vinen
通讯作者:
W. Vinen
影响因子:
2
作者:
D. Charalambous;P. C. Hendry;M. Holmes;G. Ihas;P. McClintock;L. Skrbek
通讯作者:
L. Skrbek
影响因子:
2
作者:
Shu;G. Labbé;G. Ihas
通讯作者:
G. Ihas