- Title
- A desktop supersonic free-jet beam source for a scanning helium microscope (SHeM)
- Creator
- Barr, M.; O'Donnell, K. M.; Fahy, A.; Allison, W.; Dastoor, P. C.
- Relation
- ARC.DP08831308
- Relation
- Measurement Science and Technology Vol. 23, Issue 10, p. 1-7
- Publisher Link
- http://dx.doi.org/10.1088/0957-0233/23/10/105901
- Publisher
- Institute of Physics Publishing
- Resource Type
- journal article
- Date
- 2012
- Description
- 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 × 1019 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.
- Subject
- Campargue; helium atom microscopy; helium atom scattering; helium beam source; SHeM
- Identifier
- http://hdl.handle.net/1959.13/1307863
- Identifier
- uon:21548
- Identifier
- ISSN:0957-0233
- Language
- eng
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