Cold high-intensity atomic hydrogen beam source
- 1 April 1987
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 58 (4), 547-556
- https://doi.org/10.1063/1.1139267
Abstract
A cold atomic hydrogen beamsource 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° beam flux of 9.4×101 8 H° sr− 1 s− 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.Keywords
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