The basic requirements for the detection and the recording of faint optical images are discussed and the performance of various types of faint image detectors are considered. die superiority of the vacuum device employing photoemissive surfaces as the primary photon detector is indicated. Some photoelectronic devices are reviewed and the advantages of using cascade image intensifier are pointed out. The basic design of the standard cascade image intensifier tube is described and its theoretical performance is estimated. A short description of the technique employed in the construction is given and then the methods of preparation of the phosphor screens and the photo-cathodes are described. A novel design of cascade tube for use in spectroscopy is described. A detailed description of the techniques used in the manufacture of such tubes, together with their practical development is given. Their experimental performance is studied and important operating characteristics are measured. It is concluded that the new tube design is very satisfactory from different points of view and should be a useful device in spectroscopic work.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:623154 |
| Date | January 1968 |
| Creators | Varma, Birenda Prasad |
| Publisher | Imperial College London |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://hdl.handle.net/10044/1/16134 |
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