A desktop supersonic free-jet beam source for a scanning helium microscope (SHeM)

Barr, M.; O'Donnell, Kane; Fahy, A.; Allison, W.; Dastoor, P.

doi:10.1088/0957-0233/23/10/105901

Access Status

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Authors

Barr, M.

O'Donnell, Kane

Fahy, A.

Allison, W.

Dastoor, P.

Date

2012

Type

Journal Article

Metadata

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Citation

Barr, M. and O'Donnell, K. and Fahy, A. and Allison, W. and Dastoor, P. 2012. A desktop supersonic free-jet beam source for a scanning helium microscope (SHeM). Measurement Science and Technology. 23 (10): Article ID 105901.

Source Title

Measurement Science and Technology

DOI

10.1088/0957-0233/23/10/105901

ISSN

0957-0233

School

Department of Imaging and Applied Physics

URI

http://hdl.handle.net/20.500.11937/7979

Collection

Curtin Research Publications

Abstract

A simple design for an inexpensive, compact, desktop-sized helium free-jet beam source is described. The apparatus, which is Campargue-like in design and utilizes mostly off-the-shelf parts, is capable of producing a centreline intensity of 1.2 × 10^19 atoms per second per steradian. The beam performance was investigated using a conventional ion gauge and a stagnation detector, with the latter being used to produce beam flux profiles. The profile of the macroskimmed beam has been experimentally demonstrated to be strongly Gaussian.