A scan converter storage tube with traveling-wave deflection

The operation of an EBIC (Electron Bombardment Induced Conductivity) type scan converter tube is presented with special emphasis on the ability of these tubes to respond to very high frequency phenomena in the kilomega-cycle range. The frequency limitations of an electrostatic deflection system, using conventional deflection plates, due to transit time and plate resonant frequency is discussed and scan converter design using conventional deflection plates is described. Its characteristics, deflection sensitivity, writing speed, field size and resolution, are given. The increased frequency response of a traveling wave, helix type, deflection system is presented along with a scan converter tube design and typical tube data. Finally, the design of a new type of traveling wave deflection system printed on an insulating substrate, and its operating characteristics are presented along with an all electrostatic, miniaturized and ruggedized scan converter tube using this deflection system.