Cryogenic atomic hydrogen beam apparatus with velocity characterization.
Rev Sci Instrum
; 91(1): 013201, 2020 Jan 01.
Article
em En
| MEDLINE
| ID: mdl-32012573
ABSTRACT
Precision spectroscopy of hydrogen often relies on effusive thermal atomic beams, and the uncertainty in the velocity distribution of these beams can introduce systematic errors and complicate lineshape models. Here, we present an apparatus capable of high signal-to-noise studies of these velocity distributions at cryogenic temperatures for both ground state (1S) and metastable (2S) hydrogen using a simple time-of-flight technique. We also investigate how the cryogenic nozzle geometry affects these results.
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MEDLINE
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En
Ano de publicação:
2020
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Article