Title
Thermionic emission and a novel electron collector in a liquid helium environment
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
The review of scientific instruments. - New York, N.Y.
Volume/pages
80(2009) :4 , p. 043901,1-043901,8
ISSN
0034-6748
ISI
000266597100026
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We study two techniques to create electrons in a liquid helium environment. One is thermionic emission of tungsten filaments in a low temperature cell in the vapor phase with a superfluid helium film covering all surfaces; the other is operating a glowing filament immersed in bulk liquid helium. We present both the steady state and rapid sweep I-V curves and the electron current yield. These curves, having a negative dynamic resistance region, differ remarkably from those of a vacuum tube filament. A novel low temperature vapor-phase electron collector for which the insulating helium film on the collector surface can be removed is used to measure emission current. We also discuss our achievement of producing multielectron bubbles in liquid helium by a new method.
E-info
http://link.aip.org/link/?RSINAK/80/043901/1
https://repository.uantwerpen.be/docman/iruaauth/68a645/6533329.pdf
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