A quasiparticle detector for imaging quantum turbulence in superfluid 3He-B

Ahlstrom, Sean and Bradley, Ian and Fisher, Shaun and Guénault, Tony and Guise, Edward Ashley and Haley, Richard and Holt, Stephen and Kolosov, Oleg and McClintock, Peter V. E. and Pickett, George and Poole, Malcolm and Schanen, Roch and Tsepelin, Viktor and Woods, Andrew (2014) A quasiparticle detector for imaging quantum turbulence in superfluid 3He-B. Journal of Low Temperature Physics, 175 (5-6). pp. 725-738. ISSN 0022-2291

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Abstract

We describe the development of a two-dimensional quasiparticle detector for use in visualising quantum turbulence in superfluid 3He-B at ultra-low temperatures. The detector consists of a 5×5 matrix of pixels, each a 1mm diameter hole in a copper block containing aminiature quartz tuning fork. The damping on each fork provides a measure of the local quasiparticle flux. The detector is illuminated by a beam of ballistic quasiparticles generated from a nearby black-body radiator. A comparison of the damping on the different forks provides a measure of the cross-sectional profile of the beam. Further, we generate a tangle of vortices (quantum turbulence) in the path of the beam using a vibrating wire resonator. The vortices cast a shadow onto the face of the detector due to the Andreev reflection of quasiparticles in the beam. This allows us to image the vortices and to investigate their dynamics. Here we give details of the design and construction of the detector and show some preliminary results for one row of pixels which demonstrates its successful application tomeasuring quasiparticle beams and quantum turbulence.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Low Temperature Physics
Additional Information:
© The Author(s) 2014. This article is published with open access at Springerlink.com This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
69215
Deposited By:
Deposited On:
24 Apr 2014 15:03
Refereed?:
Yes
Published?:
Published
Last Modified:
12 Jul 2020 04:40