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New Projects for Superstem

Published online by Cambridge University Press:  02 July 2020

L. M. Brown  and
A. L. Bleloch
L. M. Brown
Affiliation:
Cavendish Laboratory, Cambridge, EnglandCB4 3DG.
A. L. Bleloch
Affiliation:
Cavendish Laboratory, Cambridge, EnglandCB4 3DG.
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Extract

It is proposed to build two high-performance general-user instruments at Daresbury, Cheshire, where the present U.K. synchrotron facility is located. The instruments can be used on-site, where accommodation for visitors is already available. They can also be used remotely, via the internet. The features of the instruments are: aberration-corrected optics, voltage-stabilised electron spectrometer, and multi-specimen stages to facilitate rapid throughput of routine work. We anticipate that a sub-Angstrom probe size will be available for incoherent HAADF imaging, and PEELS with an energy resolution better than 0.3V for losses up to 2kV. The operating voltage will be l00kV.

The new instruments will allow better analysis of continuing problems. Anticipated developments are as follows:

1. Study of helium bubbles in reactor materials: Recently, accurate quantification of helium has been achieved and a quantitative explanation has been given for the ‘blue shift’, that is, the increasing threshold energy for the Is to 2p transition due to quantum confinement of the excited state with increasing gas pressure.

Type
The Theory and Practice of Scanning Transmission Electron Microscopy
Information
Microscopy and Microanalysis , Volume 6 , Issue S2: Proceedings: Microscopy & Microanalysis 2000, Microscopy Society of America 58th Annual Meeting, Microbeam Analysis Society 34th Annual Meeting, Microscopical Society of Canada/Societe de Microscopie de Canada 27th Annual Meeting, Philadelphia, Pennsylvania August 13-17, 2000 , August 2000 , pp. 98 - 99
Copyright
Copyright © Microscopy Society of America

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References

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