Cold high-intensity atomic hydrogen beam source
A cold atomic hydrogen beam source has been built and tested at BNL. The flow channel of the source, consisting of a discharge tube, a constricting nozzle, a thermal transition section, and an accommodator, was designed to operate in the laminar flow range. A novel feature of this source is a 0.3-mm gap between the transition Teflon tube which guides the flow and an accommodator which cools the flowing gas; across this gap the wall temperature may step from 100 K in the Teflon to 3 K in the accommodator. A record pulsed H/sup 0/ beam flux of 9.4 x 10/sup 18/ H/sup 0/ sr/sup -1/ s/sup -1/ was obtained at an accommodator temperature of 5.8 K. The gas dynamic analysis of the system is in excellent agreement with the experimental results.
- Research Organization:
- AGS Department, Brookhaven National Laboratory, Associated Universities, Inc., Upton, New York 11973
- OSTI ID:
- 6836034
- Journal Information:
- Rev. Sci. Instrum.; (United States), Vol. 58:4
- Country of Publication:
- United States
- Language:
- English
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ION SOURCES
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DIAGNOSTIC TECHNIQUES
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