Patent ID: 6692209
Filing Date: 2004-02-17
Classification: H01J,Y10S

Abstract:
A system, comprising:a housing having a first end and a second end, the first end coupled to a vacuum chamber; a drive support disposed within the housing; a shaft disposed within the housing the shaft adapted to extend into the vacuum chamber; a ladder coupled to the shaft, the ladder comprising at least one rung operable to retain a photocathode; a drive system supported by the drive support within the housing, the drive system coupled to the shaft and operable to translate the shaft relative to the housing to position the rung of the ladder at a predetermined location within the vacuum chamber; wherein the drive support comprises: a bearing housing; a plurality of linear bushings coupled to the bearing housing and operable to support translation of the shaft relative to the housing; a gear operable to engage corresponding teeth formed on the shaft; a rotary drive mechanism operable to provide rotation of the gear relative to the shaft; and wherein the drive support further comprises a mounting support coupled to the bearing housing, the mounting support operable to adjust an angular position of the gear relative to the shaft.