SU113634A1 - Electron beam lamp with shaped anode - Google Patents

Description

Electron-beam lamps with a figured anode, used as electrovacuum devices with a variable characteristic, are known. Their disadvantage is the impossibility of changing the characteristics during operation and, moreover, with a high frequency.

The proposed electron-beam lamp with a shaped anode and additional correction electrodes does not have the indicated drawback. The presence of correction electrodes allows changing the characteristic of the lamp with a high frequency within wide limits according to a predetermined program, which is a valuable quality in simulating counting devices.

The drawing shows schematically the device of the proposed lamp.

In the drawing, the following notation is accepted: / - indirectly heated cathode, giving a uniform ribbon beam; 2-modulator; 9- first anode; 4 second anode; 5 and (5 - deflecting plates; 7 and 8 correcting electrodes, three electrodes on each side of the beam (terminals of the correcting electrodes are brought to the surface of the balloon); 9 10 - shaped anode plates lying in the same plane (the shape of the anode is made according to the law of a parabola ); 11 — lamp bulb; 12 — collector. The arrows indicate the direction of the beam: ab - due to the floor of the deflecting plates; cd - due to the floor of the corrective electrodes; h - the height of the beam.

The principle of operation is as follows.

The electron beam is localized at a certain temperature angle, directed to the plates of the shaped anode 9 and 10. The voltage on the deflection plates 5 and causes the electron beam to move along the plates of the figured anode 9 and 10. The anode current is a function of the voltage on the deflectors plate 5 and ff, and the nature of the functional dependence is determined by the geometry of the anode 9 and 10. At the moment when the spot diameter of the electron beam is equal to the width of the plates of the shaped anode 9 and 10, the lamp current is maximum. While decreasing

No. 113634- 2

plate widths of the figure anode 9 10 anode current; respectively decreases, and the excess electrons are perceived by the collector 12. The configuration of the figure anode 9 and 10 is different, you can get any characteristic of the lamp.

Along the plates of the shaped anode 9 VL 10, correction electrodes 7 and S are mounted, to which a negative potential is connected with respect to cathode 1.

Correction electrodes 7 and serve to correct the electron beam as it moves along the plates of the shaped anode 9 and 10. With the help of the correction electrodes 7 and 5, the characteristic of the lamp varies with a high frequency within certain limits.

To increase the steepness of the lamp, i.e., to increase the ratio: the anode current uses a special

voltage on deflection plates

cathode 1 with a slit diaphragm, which makes it possible to obtain a tape electron beam, whose height h is equal to the height of the f-play anode, and the width is approximately / 2 o the width of the plate of the figure anode 9 and 10.

The shape of the characteristics is well adapted to the shape of the shaped anode.

Subject invention

Electron-beam lamp with shaped anode, which allows to obtain characteristics (a) of any shape, characterized in that, in order to change the characteristics with high frequency during operation, correcting electrodes under the negative potential are installed in the lamp along the beam movement.