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Gas Dynamics of Pulsed Low Energy Helium Beams

Abstract We report data on pulsed atomic helium beams for use in an experiment on atomic reemission of atoms incident on a superfluid helium four sample. We used a gas dynamics code to model these pulsed low energy helium beams and found a good fit with the experimental results at low source power.... Full description

Contributors: Lidke, K. A.
Williams, M. C.
Wynveen, A.
Halley, J. W.
Sekundärausgabe Online edition, Springer Online Journal Archives 1860-2002 ; 041039-1
Contained in: Journal of low temperature physics Vol. 121 (2000), p. 351-356
Journal Title: Journal of low temperature physics
Fulltext access: Fulltext access (direct link*) 10.1023/A:1017537310600
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Links: Additional Link (dx.doi.org)
ISSN: 1573-7357
DOI: 10.1023/A:1017537310600
Language: English
Notes: Copyright: Copyright 2000 Plenum Publishing Corporation
Physical Description: Online-Ressource
PPN (Catalogue-ID): NLEJ19771742X
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520 |a Abstract We report data on pulsed atomic helium beams for use in an experiment on atomic reemission of atoms incident on a superfluid helium four sample. We used a gas dynamics code to model these pulsed low energy helium beams and found a good fit with the experimental results at low source power. The fit implies that significant collisional effects occur in these beams. Using the model for the incident pulsed beam which we obtained, we produced simulated signals from the reemitted atoms which we expect to see in the experiment in which we monitor reemission from the sample when these atomic pulses are fired at it. We find that the present experiment could detect the proposed condensate mediated transmission process but that a larger superfluid sample would give a more definitive result. 
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