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The design and performance of an effusive gas source of conical geometry for photoionization studies

Lookup NU author(s): Dr Dominic Paul Seccombe, Stephen Collins, Dr Timothy Reddish


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The design, construction, and performance of an effusive gas source of conical geometry is reported. This gas jet enables experiments that require the gas and photon beams to be essentially collinear and has a focusing multicapillary array with the central portion left free for the photon beam. In total, the source comprises 90 "tubes" in three layers and has been designed by modeling free molecular gas flow and optimizing for highest gas density ∼2-3 mm from the jet's exit plane. The nature of the gas flow through the source and its focusing properties are investigated theoretically and experimentally. © 2001 American Institute of Physics.

Publication metadata

Author(s): Seccombe DP, Collins SA, Reddish TJ

Publication type: Article

Publication status: Published

Journal: Review of Scientific Instruments

Year: 2001

Volume: 72

Issue: 6

Pages: 2550-2557

ISSN (print): 0034-6748

ISSN (electronic): 1089-7623

Publisher: American Institute of Physics


DOI: 10.1063/1.1373667


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