| EPSRC Reference: |
GR/N06571/01 |
| Title: |
THEORETICAL MODELLING AND FUNDAMENTAL MEASUREMENTS FOR IMPROVED PERFORMANCE OF PHOTOCATHODES |
| Principal Investigator: |
Townsend, Professor P |
| Other Investigators: |
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| Project Partners: |
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| Department: |
Sch of Engineering and Design |
| Organisation: |
University of Sussex |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 January 2000 |
Ends: |
31 December 2001 |
Value (£): |
101,889
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| EPSRC Research Topic Classifications: |
| Optoelect. Devices & Circuits |
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| EPSRC Industrial Sector Classifications: |
| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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Photomulitplier tubes display excellent features of high gain, wide wavelength response, good linearity and dynamic range and the ability to offer photon counting. Despite these benefits the quantum efficiency of the cathode material would profit from even higher performance in the UV/blue region, and at longer wavelengths (green, red, near IR) major improvements are essential. Higher cathode quantum efficiency should result by using non-planar structures that give intense optical absorption that couples the photon energy into the cathode layer. Such enhancements would allow the use of thinner layers, with consequent gains in electron extraction. The proposal will develop the theoretical modelling of various topographic structures for a variety of materials in order to optimise the cathode efficiency for both semitransparent and reflective cathodes. The theoretical aspects of the modelling need detailed data on the dielectric constants of real photocathodes across the spectral range. Experiments to provide these data will be made. Finally, in trial experiments an optical sensation method for long wave length performance has been found and experiments to optimise this will be made, as well as attempts to understand the mechanism.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.sussex.ac.uk |