ANGULAR DEPENDENCE OF MUTUAL FRICTION IN ROTATING HELIUM II
ANGULAR DEPENDENCE OF MUTUAL FRICTION IN ROTATING HELIUM II
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旋转氦气 II 中相互摩擦力的角度依赖性
DOI：
10.1103/physrev.150.110
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发表时间：
1966
期刊：
影响因子：
--
通讯作者：
Z. Putney
中科院分区：
文献类型：
--
作者：
H. Snyder;Z. Putney
测量了矩形旋转谐振腔中二次声的衰减。谐振器可以围绕其对称轴线中的一个倾斜，使得第二声音以相对于旋转轴线的各种角度α传播。衰减作为一个函数的氦是在良好的协议与霍尔和Vinen的运动方程的氦II的预测。然而，相互摩擦参数B的绝对值比先前报道的值低约20%。在实验过程中，人们发现，在由多孔材料制成的谐振器中的第二声衰减强烈地取决于谐振器是否被与谐振器一起旋转的屏蔽件包围，或者谐振器是否在氦浴中晃动。在后一种情况下，它示出，各向同性超流湍流的谐振器内产生。
Measurements have been made of the attenuation of second sound in a rectangular rotating resonant cavity. The resonator can be tilted about one of its symmetry axes so that second sound is propagated at various angles ϑ to the rotational axis. The attenuation as a function of ϑ is in good agreement with the predictions of Hall and Vinen's equations of motion for helium II. However, the absolute values of the mutual-friction parameter B are about 20% below previously reported values. In the course of the experiments it was found that second-sound attenuation in a resonator made of porous material depends strongly upon whether the resonator is surrounded with a shield rotating with the resonator or is sloshing in the helium bath. In the latter case it is shown that isotropic superfluid turbulence is produced inside the resonator.