| EPSRC Reference: |
GR/M67582/01 |
| Title: |
A HIGH EFFICIENCY GALLIUM ARSENIDE X-RAY IMAGING SENSOR WITH INTEGRATED HEMT READOUT CIRCUITRY |
| Principal Investigator: |
Sellin, Professor PJ |
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| Department: |
Physics |
| Organisation: |
University of Surrey |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
19 May 1999 |
Ends: |
18 May 2001 |
Value (£): |
37,056
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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A high efficiency digital X-ray imaging sensor is proposed fabricated from gallium arsenide (GaAs) for applications in synchrotron and medical X-ray imaging. GaAs provides a high X-ray detection efficiency in this range of X-ray energies (10-60 keV) whereas that of silicon sensors is negligible. The proposed sensor has a monolithic design, with an integrated charge readout circuit fabricated directly onto the GaAs sensor using a matrix of High Electron Mobility Transistors (HEMTs) fabricated from epitaxial A1-GaAs Hetero-structures.Consequently the sensor avoids the need for a flip-chip bonded external readout circuit, maximising fabrication yields, and simplifying scale-up to a large scale-up to a large area-imaging device.The programme concentrates initially on the modelling and optimisation of A1-GaAs HEMT structures for sensor charge-switching applications, using fabrication facilities at the Sheffield III-V Facility. A 16 by 16 pixel prototype sensor will then be fabricated and characterised in realistic X-ray beams.
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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.surrey.ac.uk |