| 摘要 |
<p>An electron-beam converter comprises at least one of each of the following components; cathode, anode, accelerating and control electrodes, the anode having a surface orthogonal with respect to a diverging electron flow and being arranged with respect to the cathode so that the angle between normals to the surfaces of these electrodes is greater than zero but less than 180.degree. with the accelerating electrode being disposed in the opening of this angle and the control electrodes being arranged near the cathode on either size of the electron flow, a cathode-adjacent focusing electrode being arranged behind the control electrode which is on the cathode side opposite to the accelerating electrode, and an anode-adjacent focusing electrode being inserted between the anode and accelerating electrode; all said electrodes make up an electron-optical system shaping the electron flow into a beam so as to prevent electrons from impinging upon the accelerating electrode, the potentials across the electrodes being distributed so that applied to the accelerating electrode is a potential positive with respect to the cathode and having a magnitude sufficient for taking off the required amount of current, the anode potential is positive with respect to the cathode potential but substantially lower than the accelerating electrode potential, applied to the cathode and anode-adjacent focusing electrodes are potentials close or equal to the cathode or anode potentials, respectively, and the control electrode potentials are equal to the cathode potential, during the positive half-cycle, and negative with respect to the cathode, during the negative half-cycle.</p> |
