RESEARCH AND DEVELOPMENT OF TWO-COLOR DIRECT VIEW STORAGE TUBE WITH SELECTIVE ERASURE.
Interim development rept. for 1 Oct 64-1 Jan 65,
HUGHES AIRCRAFT CO OCEANSIDE CALIF
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Design and performance data on four ten-inch, twocolor storage tubes which were built during this report period are presented. The phosphor pattern in these tubes consisted of a continuous thin layer of green phosphor overlaid with red europium activated yttrium vanadate phosphor dots. The phosphor dots are registered with the storage mesh holes. Two of the four tubes were gassy and could not be evaluated. The other two were evaluated in the moving target application and performed well. Storage times which considerably exceeded the objective requirements and satisfied the more stringent needs of the moving target application were demonstrated. Color uniformity of the last tube is excellent. This tube, 502X01, has demonstrated the best overall performance of any tube to date. It has better green saturation and longer storage time than tube 435X05 which was produced during the previous quarter. Brightness has been limited because of an arc which occurred between the backing electrode and view screen. Two tubes are being fabricated similar to the last tube, except that the view screen-to-backing electrode spacing has been increased slightly.