| Popis: |
A new synchroscan streak tube PV250 is designed with a three-electrode focusing system and two low inductance electrostatic deflection systems having thick inputs (of approximately 4 mm in dia). Efforts were made to diminish the metal effect, especially on the photocathode side, for metal is gas producing which spoils infrared sensitivity. The accelerating electrode is a 0.1 mm width slit or fine mesh of 5 mm in diameter. The image-converter magnification is 1.5 and the working diameter of the phosphor screen is 25 mm. The scanning system is characterized with deflection sensitivity of 0.05 mm/V, capacitance of 4 pF, and resonance frequency of 450 Mcps. Results of dynamic tests are given and the tube's characteristics are compared with those of the Hamamatsu camera. |
