Fisher S N, Hale A J, Guénault A M, Pickett G R
Department of Physics, Lancaster University, Lancaster LA1 4YB, United Kingdom.
Phys Rev Lett. 2001 Jan 8;86(2):244-7. doi: 10.1103/PhysRevLett.86.244.
We describe the first direct observations of turbulence in superfluid 3He-B. The turbulence is generated by a vibrating-wire resonator driven at velocities exceeding the pair-breaking critical velocity. It is detected by the resulting decrease in the thermal damping on a neighboring "detector" vibrating-wire resonator. The superfluid flow field associated with the turbulence Andreev reflects thermal quasiparticle excitations, effectively screening the detector wire, resulting in a decrease in the thermal damping.
我们描述了对超流体3He-B中湍流的首次直接观测。湍流由以超过对破坏临界速度的速度驱动的振动丝谐振器产生。通过相邻“探测器”振动丝谐振器上热阻尼的减小来检测湍流。与湍流相关的超流体流场安德列夫反射热准粒子激发,有效地屏蔽了探测器丝,导致热阻尼减小。