Abstract
This paper presents a high-sensitivity camera tube for Hi-Vision, formed by combining a new 2/3-inch MS system with the HARP (High-gain Avalanche Rushing amorphous Photoconductor) target. Numerical analysis of electron trajectories and experimental results leads to the following new fundamental design concepts. (1) Making the anode surface opposite the cathode in convex form reduces the power dissipation at the anode. (2) By applying a twist to the DEFLECTRON on the target side from its mid-point and by using a ring electrode of suitable length, the beam landing characteristics and the resolution in the picture corners can be improved. These concepts were successfully implemented in a new tube ten times as sensitive as Saticon tubes. The amplitude response is 29 % at 800 TV lines in the ITE AR chart. Resolution is uniform over the entire picture area, with no sacrifice in lag or shading.
