High Speed Imaging of Generation and Collapse of Multielectron Bubbles in Liquid Helium

Joseph, EM and Vadakkumbatt, V and Pal, A and Ghosh, A (2014) High Speed Imaging of Generation and Collapse of Multielectron Bubbles in Liquid Helium. In: JOURNAL OF LOW TEMPERATURE PHYSICS, 175 (1-2). pp. 78-84.

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Abstract

We present experimental results on the generation and collapse of multielectron bubbles in liquid helium. By applying voltage pulses to a tungsten tip above the surface of the liquid, millimetre sized deformations were formed. Using high speed photography, we have imaged the disintegration of these deformations into bubbles of sizes ranging from ten to few hundred microns. At temperatures less than 2 K, the bubbles split into smaller bubbles and then disappeared in a time scale of few milliseconds. Smaller bubbles were formed at temperatures around 3 K, but were visible for more than hundreds of milliseconds. Although we have not been able to measure their charge directly, some of these bubbles responded to electric fields, implying these were indeed multielectron bubbles. With the existing theoretical picture, it is not possible to understand the strong dependence of the lifetime of multielectron bubbles on temperature.

Item Type:	Journal Article
Publication:	JOURNAL OF LOW TEMPERATURE PHYSICS
Publisher:	SPRINGER/PLENUM PUBLISHERS
Additional Information:	copyright for this article belongs to SPRINGER/PLENUM PUBLISHERS, USA
Keywords:	Multielectron bubbles; Electrohydrodynamic instability; High speed imaging
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	24 Apr 2014 07:34
Last Modified:	24 Apr 2014 07:34
URI:	http://eprints.iisc.ac.in/id/eprint/48904

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