DE1103471B - Collecting electrode for run-time tubes - Google Patents

Description

The invention relates to time-of-flight tubes in which the electron beam from a coaxial to the beam axis arranged, rotationally symmetrical collecting electrode is collected with devices for Generation of a magnetic or electrical deflection field is provided, which the incoming Deflects the electron beam in a rotating manner perpendicular to its axis and is distributed at least approximately uniformly can impinge on the collecting electrode.

In this way - as is known - the electrons are prevented from always being in the same place Strike the collecting electrode, whereby a better heat dissipation is achieved.

There are known time tubes in which the electrons from the above-mentioned principle Electron beam reach successive areas of the collecting electrode. It becomes a cup-shaped Collecting electrode used, on the inside of which the electron beam rotates. Such a one Compared to the subject matter of the invention, the arrangement has a relatively unfavorable heat dissipation capability.

The aim of the invention is to create a collecting electrode for time-of-flight tubes, which according to the aforementioned Principle works and a relatively short one with very favorable heat dissipation capability having axial length.

According to the invention this object is achieved in that the collecting electrode consists of at least three Rotationally symmetrical ones that are coaxially one behind the other in the direction of the beam, isolated from one another in terms of direct current Parts consists, the inner diameter of which increases gradually from part to part in the direction of the beam and of which (seen in the direction of the beam) the first part is tubular, the last part is cup-shaped and the part (s) in between is (are) annular and these parts in relation to each other are arranged that the subsequent part slightly overlaps the preceding part, and that the strength of the deflection field and the equal potentials of the increasing from the first to the last part Parts are chosen so that the electron beam hits all parts at all times. The electrons will sorted according to their speed and "collected" accordingly. The invention will explained by the drawing.

The drawing shows a collecting electrode made up of a number of rotationally symmetrical partial electrodes 7 to 10 consists. A collecting electrode constructed in this way is known per se. The partial electrode 7 has Tubular shape, the partial electrodes 8 and 9 have a ring shape, while the partial electrode 10 is pot-shaped is. The partial electrodes are arranged coaxially and overlap, as can be seen. Preserved in operation Collecting electrode for time tubes

Applicant:

English Electric Valve Company Limited, London

Representative: Dr. W. Müller-Bore, patent attorney, Braunschweig, Am Bürgerpark 8

Claimed Priority: Great Britain January 29 and October 4, 1957

Richard Greville Roach, Great Baddow, Essex

(Great Britain), has been named as the inventor

the electrodes have different positive DC potentials that rise from electrode 7 to electrode 10, and the electron beam 3 is a rotating one extending substantially perpendicular to the beam axis Exposed to a magnetic field generated by a coil system 4 of any conventional type (e.g. a Pair of perpendicular coils, fed with alternating currents shifted by 90 ° Amplitude or similarly arranged coils fed by a three-phase system) and that the beam constantly deflects across (as indicated by the dashed lines) and across the interior surfaces the partial electrodes run rotating. The beam is therefore constantly deflected into a certain position and rotates through a series of such positions. Of course, instead of the magnetic Deflection with coils also uses a per se known electrical deflection with baffle plates will.

Claims (1)

Claim: Time-of-flight tube, in which the electron beam moves from a coaxial to the beam axis, rotationally symmetrical collecting electrode is collected with facilities for generating a magnetic or electrical deflection field is provided, which the incoming electron beam deflects rotating perpendicular to its axis and at least approximately uniformly can impinge distributed on the collecting electrode, characterized in that the collecting electrode of at least three coaxial in the direction of the beam 109 538/453 consists of rotationally symmetrical parts lying one behind the other, isolated from one another in terms of direct current, whose inner diameter in the direction of the beam of Part to part gradually increases and of which (seen in the direction of the beam) the first part is tubular, the last part is cup-shaped and the part (s) in between is formed in a ring shape is (are) and these parts in such a way to each other arranged are that each following part slightly overlaps the previous part, and that the strength of the deflection field as well the equal potentials of the parts increasing from the first to the last part are chosen so that the electron beam hits all parts at all times. Considered publications:
French patent specification No. 991 127. 1 sheet of drawings © 109 538/453 3.61