Imperial College London
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DrPaulBruce

Faculty of Engineering, Department of Aeronautics

Reader in High-Speed Aerodynamics
 
 
 
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Contact

 

+44 (0)20 7594 5048p.bruce

 
 
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Location

 

333City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Kahk:2015:10.1016/j.elspec.2015.08.005,
author = {Kahk, JM and Villar-Garcia, IJ and Grechy, L and Bruce, PJK and Vincent, PE and Eriksson, SK and Rensmo, H and Hahlin, M and Ahlund, J and Edwards, MOM and Payne, DJ},
doi = {10.1016/j.elspec.2015.08.005},
journal = {Journal of Electron Spectroscopy and Related Phenomena},
pages = {57--65},
title = {A study of the pressure profiles near the first pumping aperture in a high pressure photoelectron spectrometer},
url = {http://dx.doi.org/10.1016/j.elspec.2015.08.005},
volume = {205},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In a high-pressure photoelectron spectrometer, the sample is positioned close to a differential pumping aperture, behind which the pressure is several orders of magnitude lower than the pressure in the analysis chamber. To find the optimal sample position, where the path length of the photoelectrons through the high pressure region is minimized as far as possible without compromising knowledge of the actual pressure at the sample surface, an understanding of the pressure variations near the sample and the aperture is required. A computational fluid dynamics study has been carried out to examine the pressure profiles, and the results are compared against experimental spectra whose intensities are analyzed using the Beer–Lambert law. The resultant pressure profiles are broadly similar to the one previously derived from a simplistic molecular flow model, but indicate that as the pressure in the analysis chamber is raised, the region over which the pressure drop occurs becomes progressively narrower.
AU  - Kahk,JM
AU  - Villar-Garcia,IJ
AU  - Grechy,L
AU  - Bruce,PJK
AU  - Vincent,PE
AU  - Eriksson,SK
AU  - Rensmo,H
AU  - Hahlin,M
AU  - Ahlund,J
AU  - Edwards,MOM
AU  - Payne,DJ
DO  - 10.1016/j.elspec.2015.08.005
EP  - 65
PY  - 2015///
SN  - 1873-2526
SP  - 57
TI  - A study of the pressure profiles near the first pumping aperture in a high pressure photoelectron spectrometer
T2  - Journal of Electron Spectroscopy and Related Phenomena
UR  - http://dx.doi.org/10.1016/j.elspec.2015.08.005
UR  - http://hdl.handle.net/10044/1/29233
VL  - 205
ER  -
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