DE1614311A1 - Electron multiplier tubes - Google Patents

Description

Dr.-Injr. H = i: s-dietrid. lefi «

■ Patent attorney

Note: rN · V. Philips Gloeilampenfabrieken
Act Na ΈΜ- 2734
January 8, 1968

Electron multiplier tube

The invention relates to an electron multiplier tube, the V _{1 of which has} a stack of insulating rings and electrically conductive, ring-shaped disks, which disks carry dynodes which form coaxial bodies of revolution, at least one of which is an inner dynode which is partially within an outer dynode.

illegal tr onenvervi eleven acher tube, in which the dynode,

structure forms a coaxial rotation structure, usually have a large size Number of inner dynods that differ from outer dynods, whereby the Synods are supported together by insulating girders, with separate, electrically conductive wires passed through the wall Enable connection to an external voltage source. These electron multiplier tubes however, electrical connections of high capacitance and mechanical impacts are poorly resistant.

Ü3 an electron multiplier tube is known in which

di '; a coaxial rotation structure forming dynodes of electrically conductive electrodes, ring-shaped disks are worn, which form part of the ear and bilrion. The Köhrenwand contains a melted pile

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BATH ORIGINAL

of washers and insulating rings · The washers are not only used as dynode carriers but also form part of the electrical connections by which the dynodes are connected to a voltage source they form means for an expedient exchange of values · In this well-known Electron multiplier tubes are internal dynodes made up of cylindrical pieces of pipe connected with the disks, thereby increasing the number of dynodes and, the Geometry of the dynodes is restricted. The Hohrstficke form a night Shielding for the flow of electrons.

The aim of the invention is to provide an electron multiplier

tube to indicate »in the revolution dynodes of electrically conductive, ring-shaped Discs are fixed in the Höhrenwand, wherein the aforementioned disadvantages are eliminated.

In eixi3T electron multiplier tube , its 7 »and one

Stacking of insulating hangers and electrically conductive, ring-shaped disks, which disks carry coaxial non-rotation bodies forming dynodes, of which at least one is an inner dynode, which is partially within an Auseendynode, this inner dynode is according to the invention with the disc carrying this dynode by means of at least one The rod-shaped, electrically conductive carrier is connected at least essentially transversely to the axis of rotation of the dynodes. The outer electrode can be supported by a "ring" solid support, which rests on the disc carrying the "outer electrode". Such an annular carrier preferably has fastening tongues on the inside and on the sleeve side. The rod-shaped, electrically conductive carrier can rest on a ring-shaped carrier which lies on the disk carrying the inner electrode. The outer electrode is preferably provided with passages for the rod-shaped carrier.

The invention is illustrated by the accompanying drawing explained in the

Pig. 1 shows a section through the upper and lower toil of an execution foru a Llektronenvervielfacherrohro after

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_ ₃ _ PHN.2734.

Pig «2 shows a part of the Kinganga stage of the tube according to _{FIG. 1} ; FIG. 5 shows an amplifier stage of the itoiire according to FIG. Me input stage of the drilling according to I ¹ Ig. S forms the subject of patent application PHN. 2306 of the Aniaeldorin. This iJingangsstufe contains a Fhotokuthode 1 _t the let mounted on the Hückseite a front plate 2 aua Glue * the front panel 2 is fixed to a metal ring 3 ^ eschmolzen on which the further portion eats 4 RohronhÜlle fixed and as an electrical connection for the Ihotokathode 1 serves. A first focusing electrode F ₁ consists of a wire 5 which is attached to the photocathode 1 and a tube 6. A second focus control electrode F ₂ is made by damping aluminum on the ear sleeve obtain. The focusing electrode 1 'has the potential of the photocathode 1 and the focusing electrode ρ is connected through a lead-through 7' to a voltage source (not shown). A first acceleration _{electrode A 1} and a wide acceleration electrode A ₂ have the potential of the first dynode S. The shape of the photocathode and the position of the insulation electrodes make it possible, by means of a circular cross-section of light, to create a photoelectron bundle with a small cross-section, so that it is practically completely captured on the third dynode. The active surface of the photocathode is ring-shaped and has circles with a diameter of 9 ° or 3 cubic inches. In this case, 99.9% of the photoelectrons are captured in the iängangöstufö dor tube nafeft'figii 1 in Porfc an atizah! Equipotential lines 18 and 9 e * B »}. Fig. 2 shows more precise details of the Phoioelsktrons (10 above),. ,. The for the 3rfiÄ ^ uag essential part of the. Pipes to *

Flit · 1 is formed by the gain stages. These contain i'ishe Fig. 1 / Äuaseniynoden Mt uneven Grdnungssahlsa ^ _{1 f} λ ^> us «- * uni inner

.4- PHN.2734.

u * w. are carried by electrically conductive disks D., D ₂ , D ₅ , D., etc. * The disks are fused on the rings R located between them and serve as electrical feeds for the dynodes. In a known manner, feeds are associated with positively increasing voltages which are adapted to "achieve good linearity and speed"

View of a Veretfirkeretufe the RShre according to Fig. 1, which is partially

Broohen is shown · Biese Veretfirkeretufe contains an external dynod

S, and an inner dynod S., Die, Aueeendynode.S- is attached to an annular ? # 4 7

Mounted carrier 11, with a tongue 12 for attachment to the dynode S and ein.Zunge 13 for attachment to the Seheibe B- is provided «Die Gestalt of the TrSgera 11 results in excellent mechanical rigidity. the

Inner dynode S. is supported by two crossed metal wires I4 and 15, 4th

which is attached to a support 16 which rests on the disk D. · The dynode S- has passages 17 for wires I4 and 15 · Also attaching the Inner dynode gives good mechanical rigidity during the fastening means can hardly influence the electron flow

The output stage of the RShre according to Fig. 1 is the subject of Applicant's patent application FHK * 2309. According to FIG. 1, it contains a cylindrical one Anode 10 having a conical extension if? has that mechanically and electrically to inner lead 20 of an output coaxial conductor C. is connected, which is melted in the bottom of the tube * The outer pipe 21 of the coaxial output conductor C is connected to a conductive truncated cone 22, which gives the anode coaxially. At 23 and 24 there is one in the tube Integrated capacitance provided for decoupling the electrodes · I9 and 22 form a coaxial conductor with a wave resistance of 50 ohms, so that the output of the electron multiplier can be conveniently used with signal detection let connect.

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Claims (1)

-. - ' Electron multiplier tube' whose wall contains a 'stacking' of insulating rings and electrically conductive, ring-shaped disks, soft disks bear dynodes forming coaxial bodies of rotation, of which at least one is an inner dynode which is partially inside an Auesen · - -r _A "ν" ■■ - ■■ - ■ - ■■■ ■ ■ ■ - W dynode is »characterized * by the fact that this inner dynode coincides with that of the ·· dynode supporting Seheibe by means of at least one at least essentially quei to ■ · The axis of rotation of the dynodes is »steady» electrically conductive Tragers is connected. 2t electron multiplier according to claim ί characterized that the outer dynode is supported by an annular support, on the inside a tongue for attachment to the AuaSandynode and on the outside a tongue for attachment to the outer dynod bearing Disk has »· a ■ 5 · Electron multiplier tube according to claim 1 or 2j da * fP characterized in that the outer dynode with passages for the βtabfSriiigen Trager Yersehen is - BATH ORIGINAL 009819/1079 L e β r s β i t β