A high flux metastable atomic discharge source with three-dimensional translation

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Title A high flux metastable atomic discharge source with three-dimensional translation
Author Baker, Mark Adam; Palmer, Adam James; Sang, Robert
Journal Name Measurement Science and Technology
Year Published 2003
Place of publication UK
Publisher Institute of Physics Publishing
Abstract We present a new apparatus for the generation of a high flux metastable atomic beam. This source has provided a high flux of metastable helium and argon atoms via a cold cathode discharge with fluxes for metastable helium of up to 9 × 1014 sr-1 s-1. This new source can be translated in three dimensions whilst under vacuum and cooled to 77 K. Experimental results demonstrate that the distance of the source nozzle from the skimmer is important in obtaining the optimum flux. Under typical operating conditions, this optimal distance is 9–10 mm using He. Time-of-flight spectra show that for Ar the average thermal velocity of the beam is 540 m s-1 and can be reduced to 330 m s-1 by cooling the source with liquid nitrogen.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.iop.org/EJ/journal/MST
Alternative URI http://dx.doi.org/10.1088/0957-0233/14/4/401
Volume 14
Page from N5
Page to N8
ISSN 0957-0233
Date Accessioned 2004-03-30
Date Available 2009-09-14T07:15:05Z
Language en_AU
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science
Subject PRE2009-Atomic and Molecular Physics
URI http://hdl.handle.net/10072/6331
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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