OPTICAL INVESTIGATIONS OF FILM DYNAMICS IN SUPERFLUID HE-3 USING A COOLED CHARGED COUPLED DEVICE

被引：9

作者：

RUUTU, JP ^{[1
]}

ALLES, H ^{[1
]}

BABKIN, AV ^{[1
]}

HAKONEN, PJ ^{[1
]}

SONIN, E ^{[1
]}

机构：

[1] AF IOFFE PHYS TECH INST,ST PETERSBURG 194021,RUSSIA

来源：

EUROPHYSICS LETTERS | 1994年 / 28卷 / 03期

关键词：

D O I：

10.1209/0295-5075/28/3/002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated optically the dynamics of 0.1 mm thick superfluid He-3 films at temperatures 0.66-1.0T(c), using a CCD sensor at 70 K inside the vacuum can of our nuclear-demagnetization cryostat. Relaxation of the free liquid surface, deflected 0.5mum from equilibrium by a 5 nJ heat pulse, was found to be overdamped with a time constant tau(s) almost-equal-to 1 s close to T(c). Using two-fluid hydrodynamics, the measured response curves were employed to determine the second-viscosity coefficient zeta3 in the range 0.86-0.99T(c). A good agreement with the theoretical results by Einzel was obtained.

引用

页码：163 / 168

页数：6

共 21 条

[1] COOLED VIDEO CAMERA FOR OPTICAL INVESTIGATIONS BELOW 1-MK [J].