US2227031A - Phototube with electron multiplier - Google Patents

Phototube with electron multiplier Download PDF

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Publication number
US2227031A
US2227031A US191451A US19145138A US2227031A US 2227031 A US2227031 A US 2227031A US 191451 A US191451 A US 191451A US 19145138 A US19145138 A US 19145138A US 2227031 A US2227031 A US 2227031A
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US
United States
Prior art keywords
cathode
nets
multiplier
electron multiplier
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US191451A
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English (en)
Inventor
Schlesinger Kurt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOEWE RADIO Inc
Original Assignee
LOEWE RADIO Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LOEWE RADIO Inc filed Critical LOEWE RADIO Inc
Application granted granted Critical
Publication of US2227031A publication Critical patent/US2227031A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/04—Electron multipliers
    • H01J43/06—Electrode arrangements
    • H01J43/18—Electrode arrangements using essentially more than one dynode
    • H01J43/22—Dynodes consisting of electron-permeable material, e.g. foil, grid, tube, venetian blind

Definitions

  • each stage is equal to the preceding one.
  • the linal collector electrode 5 Since the cross-section of the bundle of cathode rays does not converge in an arrangement of this character, the linal collector electrode 5 must have substantially the same large crosssection as the initial net 2
  • the large-surface collector net 5 has a rather large capacity, and the resistance 6 coupling the tube with the ampliiler grid must accordingly be so small that the adaptation to the tube is poor. If the collector 5 could be made considerably smaller, resistance 6 and consequently the useful potential could be considerably increased. 'I'his would be possible if it could be accomplished that the cross-section of the bundle of electrons contracts more and more upon traversing the net amplier.
  • the collecting electrode 8 may, according to Fig. 3, advantageously be replaced by ⁇ a fourpole cylindrical collector, performing in itself an additional multiplication by secondary emission as described in my application Ser. No. 190,003.
  • a collector of this kind consists of a semi-cylindrical net 8, an electrode 9 forming the other half of the cylinder, ⁇ a pin electrode I0 in the axis of the system and a cylindrical grid surrounding said pin.
  • the potentials of said 4 electrodes are 20 tapped at the potentiometer 4.
  • An electron multiplier comprising a large surface cathode, a series of plane surface secondary emissive nets mounted substantially parallel 25 with one another and perpendicular to the axis of said multiplier and adapted toV be provided with stagewise increasing positive potentials with respect to said cathode, a .collecting anode, and electron-optical means between said cathode and 30 said anode for gradually reducing the diameter of the electron stream along its path between said last mentioned electrodes, said nets having stagewise decreasing diameters in the direction from said cathode towards said anode.
  • An electron multiplier comprising a large surface cathode, a series of plane surface secondary emissive nets mounted substantially parallel with one another and perpendicular to the axis of said multiplier and adapted to be provided 40 with stagewise increasing positive potentials with respect to said cathode, a series of cylindrical electrodes each being disposed between two adjacent ones of said nets and connected to said cathode, and a collecting anode.
  • An electron multiplier comprising a large surface cathode, a series of plane surface secondary emissive nets mounted substantially parallel with one another and perpendicular to the axis of said multiplier and adapted to be provided with 50 stagewise increasing positive potentials with respect to said cathode, a collecting anode, and a cylindrical electrode surrounding said nets and connected to said cathode.
  • An electron multiplier comprising a large 55 surface cathode, a series of plane surface secondary emissive nets mounted substantially parallel with one another and perpendicular to the axis of said multiplier and adapted to be provided with stagewise increasing positive potentials with respect to said cathode, a series of cylindrical electrodes each being disposed between two adjacent ones of said net and connected to said cathode, and a collecting anode, said nets as well as said cylindrical electrodes having stage-Wise decreas-l ing diameters in the direction from said cathode towards said anode.
  • An electron multiplier comprising a large surface cathode, a series of plane surface secondary emissive nets mounted substantially parallel with one another and perpendicular to the axis of said multiplier and adapted to be provided-with stage-Wise increasing positive potentialsl with respect to said cathode, a collecting anode, and a funnel-shaped electrode surrounding said nets at about equal distances therefrom and being connected to said cathode, said nets having stage- Wise decreasing diameters in the direction from said cathode towards said anode.
  • An electron multiplier comprising a large surface cathode, a series of plane surface secondary emissive nets mounted substantially parallel with one another and perpendicular to the axis of said multiplier and adapted to be provided with stage-wise increasing positive potentials with respect to said cathode, a funnel-shaped electrode mounted inside said multiplier surrounding said nets and connected to said cathode, and a collecting system consisting of a further net-shaped electrode having the shape of one half of a cylinder, a further solid electrode forming the other half of said cylinder, a pin electrode forming the axis of said cylinder and being mounted perpendicular to the axis of said multiplier, and a gridlike output electrode mounted between said pin electrode and said cylinder.

Landscapes

  • Electron Tubes For Measurement (AREA)
US191451A 1937-02-24 1938-02-19 Phototube with electron multiplier Expired - Lifetime US2227031A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE426582X 1937-02-24

Publications (1)

Publication Number Publication Date
US2227031A true US2227031A (en) 1940-12-31

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ID=6547913

Family Applications (1)

Application Number Title Priority Date Filing Date
US191451A Expired - Lifetime US2227031A (en) 1937-02-24 1938-02-19 Phototube with electron multiplier

Country Status (5)

Country Link
US (1) US2227031A (enrdf_load_stackoverflow)
BE (1) BE426582A (enrdf_load_stackoverflow)
FR (1) FR834122A (enrdf_load_stackoverflow)
GB (1) GB511780A (enrdf_load_stackoverflow)
NL (1) NL52063C (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478163A (en) * 1944-12-30 1949-08-02 Gen Aniline & Film Corp Logarithmic photometer
US2585044A (en) * 1945-02-05 1952-02-12 Farnsworth Res Corp Gain control apparatus
US3130342A (en) * 1947-04-05 1964-04-21 George A Morton Photoelectric cell
US3234422A (en) * 1957-03-07 1966-02-08 Itt Collector for barrier grid storage tube

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478163A (en) * 1944-12-30 1949-08-02 Gen Aniline & Film Corp Logarithmic photometer
US2585044A (en) * 1945-02-05 1952-02-12 Farnsworth Res Corp Gain control apparatus
US3130342A (en) * 1947-04-05 1964-04-21 George A Morton Photoelectric cell
US3234422A (en) * 1957-03-07 1966-02-08 Itt Collector for barrier grid storage tube

Also Published As

Publication number Publication date
GB511780A (en) 1939-08-24
NL52063C (enrdf_load_stackoverflow) 1942-03-16
FR834122A (fr) 1938-11-14
BE426582A (enrdf_load_stackoverflow) 1938-03-31

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