GB1352733A - Electron multipliers - Google Patents

Electron multipliers

Info

Publication number
GB1352733A
GB1352733A GB3217171A GB1352733DA GB1352733A GB 1352733 A GB1352733 A GB 1352733A GB 3217171 A GB3217171 A GB 3217171A GB 1352733D A GB1352733D A GB 1352733DA GB 1352733 A GB1352733 A GB 1352733A
Authority
GB
United Kingdom
Prior art keywords
septum
channel
glass
channel plate
employed
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
Application number
GB3217171A
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.)
Philips Components Ltd
Original Assignee
Mullard Ltd
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 Mullard Ltd filed Critical Mullard Ltd
Publication of GB1352733A publication Critical patent/GB1352733A/en
Expired legal-status Critical Current

Links

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
    • H01J43/24—Dynodes having potential gradient along their surfaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C03B37/02745—Fibres having rotational spin around the central longitudinal axis, e.g. alternating +/- spin to reduce polarisation mode dispersion
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/10—Non-chemical treatment
    • C03B37/14—Re-forming fibres or filaments, i.e. changing their shape
    • C03B37/15—Re-forming fibres or filaments, i.e. changing their shape with heat application, e.g. for making optical fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/02—External structure or shape details
    • C03B2203/04—Polygonal outer cross-section, e.g. triangular, square
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C03B2203/14—Non-solid, i.e. hollow products, e.g. hollow clad or with core-clad interface
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C03B2203/18—Axial perturbations, e.g. in refractive index or composition
    • C03B2203/20—Axial perturbations, e.g. in refractive index or composition helical
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/06—Rotating the fibre fibre about its longitudinal axis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Electron Tubes For Measurement (AREA)

Abstract

1352733 Channel plate manufacture MULLARD Ltd 15 March 1972 [8 July 1971] 32171/71 Heading C1M [Also in Division H1] Ion feedback in the glass channel plate of an electron multiplier is suppressed by the provision in each channel of a longitudinal single or multiple glass septum which is twisted along the length of the channel so that, apart from the thickness of the septum, the crosssectional area of each channel is subdivided into two or more separate helical sub-channels. Either a single diametral septum may be employed (Figs. 1 and 2, not shown), or a radial multiple septum, as shown in Fig. 3, and the individual cylindrical channel tubes may be formed into an hexagonal packing arrangement, as shown in Fig. 4. The channel plate may be manufactured by drawing down a tube with a septum supported therein to a single fibre, twisting the fibre during the drawing process, forming a boule from such twisted fibres, and slicing the baule along parallel cutting planes spaced apart by a 360 degree angle of twist (Figs. 9 and 10, not shown). Temporary, readily etchable, hollow glass cores may be employed to support the septum during manufacture.
GB3217171A 1971-07-08 1971-07-08 Electron multipliers Expired GB1352733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3217171 1971-07-08

Publications (1)

Publication Number Publication Date
GB1352733A true GB1352733A (en) 1974-05-08

Family

ID=10334414

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3217171A Expired GB1352733A (en) 1971-07-08 1971-07-08 Electron multipliers

Country Status (2)

Country Link
US (1) US3902089A (en)
GB (1) GB1352733A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4649314A (en) * 1983-07-11 1987-03-10 U.S. Philips Corporation Electron multiplier element, electron multiplier device comprising said multiplying element, and the application to a photomultiplier tube

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3016705A1 (en) * 1980-04-30 1981-11-05 Siemens AG, 1000 Berlin und 8000 München GLASS FIBER FOR LIGHTWAVE GUIDE PURPOSES AND METHOD FOR THEIR PRODUCTION
EP0089498B1 (en) * 1980-04-30 1986-08-27 Siemens Aktiengesellschaft Method of making a multi-core optical fibre
FR2515632A1 (en) * 1981-11-03 1983-05-06 Thomson Csf METHOD FOR OBTAINING A CHIRAL-STRUCTURE OBJECT DERIVED FROM STRETCHING FROM A SOURCE OF RAMOLLIE MATERIAL, AND DEVICE USING SAID METHOD
US5086248A (en) * 1989-08-18 1992-02-04 Galileo Electro-Optics Corporation Microchannel electron multipliers
US6427491B1 (en) * 1999-08-20 2002-08-06 Corning Incorporated Method for making fibers having cores with non-circular cross-sections
US6422043B1 (en) * 1999-11-16 2002-07-23 Fitel Usa Corp. Method of making an improved multimode optical fiber and fiber made by method
US7062126B2 (en) * 2002-06-07 2006-06-13 Kersey Alan D Tunable optical filter having large diameter optical waveguide with bragg grating and being configured for reducing the bulk modulus of compressibility thereof
US7154086B2 (en) * 2003-03-19 2006-12-26 Burle Technologies, Inc. Conductive tube for use as a reflectron lens
US20060130528A1 (en) * 2004-12-22 2006-06-22 Nelson Brian K Method of making a hole assisted fiber device and fiber preform
US20080073516A1 (en) * 2006-03-10 2008-03-27 Laprade Bruce N Resistive glass structures used to shape electric fields in analytical instruments
RU2437129C1 (en) * 2010-03-24 2011-12-20 Закрытое акционерное общество "Профотек" Method of making birefringent microstructured optical fibre
US20110265520A1 (en) * 2010-04-28 2011-11-03 Xin Chen Methods For Determining The Rotational Characteristics Of An Optical Fiber
WO2018002972A1 (en) * 2016-07-01 2018-01-04 東芝三菱電機産業システム株式会社 Method for producing insulating structure, insulating structure, and rotating electrical machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275428A (en) * 1963-05-21 1966-09-27 American Optical Corp Method of making honeycomb structure
US3612946A (en) * 1967-08-01 1971-10-12 Murata Manufacturing Co Electron multiplier device using semiconductor ceramic
US3678328A (en) * 1968-11-01 1972-07-18 Bendix Corp Channel multiplier assembly and method of manufacture thereof
US3665497A (en) * 1969-12-18 1972-05-23 Bendix Corp Electron multiplier with preamplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4649314A (en) * 1983-07-11 1987-03-10 U.S. Philips Corporation Electron multiplier element, electron multiplier device comprising said multiplying element, and the application to a photomultiplier tube

Also Published As

Publication number Publication date
US3902089A (en) 1975-08-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee