CATHODE HOLDER FOR AN ELECTRON BEAM GENERATOR

摘要

The cathode holder 4 has two terminals 8, 9 which are rigidly connected to one another and together form a flange 20 which by means of a pressure bearing with spheres 27, 28 made of a ceramic material is supported in a carrier flange 3 connected to the control electrode 5. The spheres 27, 28 rest in rolling paths aligned in radial direction to the optical axis 14 and provide a centering of the cathode 7 with respect to the control electrode 6 which is independent of expansions.