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Field emission and field ionization in liquid 3He above 0.25 K.

McClintock, Peter V. E. (1973) Field emission and field ionization in liquid 3He above 0.25 K. Journal of Low Temperature Physics, 11 (1/2). pp. 15-31. ISSN 0022-2291

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Abstract

We have investigated the field emission and field ionization in liquid 3He under low pressure between 0.25 and 2.0 K. Experimental data in the high-current regime are strongly affected by the buildup of temperature gradients, but this effect can be avoided by pulsing the emitter. Under pulsed conditions in the space-charge region the data are well described by a simple theory which does not require detailed knowledge of the generating mechanism. Data at low currents, which are completely different for positive and negative ions, are presented and discussed but are not understood in detail. Comparison is drawn between this work and earlier studies of 4He, and the advantages of this type of ion source for use in 3He at ultra-low temperatures are discussed.

Item Type: Article
Journal or Publication Title: Journal of Low Temperature Physics
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 32531
Deposited By: Professor P. V. E. McClintock
Deposited On: 12 Apr 2010 15:11
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 17:12
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/32531

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