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Abstract:
We have investigated photoemissive structures which can achieve the required display performance of digital mammography. A design utilizing a thin glass faceplate supported by a glass microcapillary array was evaluated. The original objectives of this project was to model the performance of emissive structures and evaluate designs with high performance. With respect to performance modeling we have; (1) developed software to describe the electric field and the trajectories of electrons and used it to study the effect of the focusing plate electrode, (2) used electron/photon transport computations to characterize the electron backscattering from phosphor layers, and (3) developed a simulation code to study the luminance spread function of emissive structures and reported results for conventional CRT structures and for thin structures. With respect to the evaluation of potential designs we have; (1) constructed a vacuum subsystem and experimental chamber into which a cathode and emissive structure can be mounted, (2) designed, built and tested a unique cone shaped luminance probe that will measure spread function tails on actual emissive structures. (3) Identified electron charge deposition processes that limit the utility of the originally proposed method using microcapillary designs.
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Description: |
Final rept. 3 Sep 96-2 Sep 98 |
| Pages: |
362 |
| Report Date: |
OCT 1998 |
| Contract Number: |
DAMD17-96-1-6283 |
| Report Number: |
A946583 |
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