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Note: a helical velocity selector for continuous molecular beams

Note: a helical velocity selector for continuous molecular beams
Note: a helical velocity selector for continuous molecular beams
We report on a modern realization of the classic helical velocity selector for gas phase particle beams. The device operates stably under high vacuum conditions at rotational frequencies limited only by commercial dc motor capabilities. Tuning the rotational frequency allows selective scanning over a broad velocity band. The width of the selected velocity distributions at full-width-half-maximum is as narrow as a few percent of the selected mean velocity and independent of the rotational speed of the selector. The selector generates low vibrational noise amplitudes comparable to mechanically damped state-of-the-art turbo-molecular pumps and is therefore compatible with vibration sensitive experiments like molecule interferometry
0034-6748
106107-[3pp]
Szewc, Carola
2fcc2ded-e192-4f1b-8420-2677952ef666
Collier, James D
144c5e8f-553a-4bfc-a91e-2751ad661151
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Szewc, Carola
2fcc2ded-e192-4f1b-8420-2677952ef666
Collier, James D
144c5e8f-553a-4bfc-a91e-2751ad661151
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d

Szewc, Carola, Collier, James D and Ulbricht, Hendrik (2010) Note: a helical velocity selector for continuous molecular beams. Review of Scientific Instruments, 81 (10), 106107-[3pp]. (doi:10.1063/1.3499254). (PMID:21034135)

Record type: Article

Abstract

We report on a modern realization of the classic helical velocity selector for gas phase particle beams. The device operates stably under high vacuum conditions at rotational frequencies limited only by commercial dc motor capabilities. Tuning the rotational frequency allows selective scanning over a broad velocity band. The width of the selected velocity distributions at full-width-half-maximum is as narrow as a few percent of the selected mean velocity and independent of the rotational speed of the selector. The selector generates low vibrational noise amplitudes comparable to mechanically damped state-of-the-art turbo-molecular pumps and is therefore compatible with vibration sensitive experiments like molecule interferometry

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Published date: 19 October 2010

Identifiers

Local EPrints ID: 180595
URI: http://eprints.soton.ac.uk/id/eprint/180595
ISSN: 0034-6748
PURE UUID: 3ed3f90a-f374-4411-8535-9a8817eae717
ORCID for Hendrik Ulbricht: ORCID iD orcid.org/0000-0003-0356-0065

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Date deposited: 12 Apr 2011 13:29
Last modified: 14 Jul 2022 01:43

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Contributors

Author: Carola Szewc
Author: James D Collier

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