[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

US3702412A - Apparatus for and method of producing an energetic electron curtain - Google Patents

Apparatus for and method of producing an energetic electron curtain Download PDF

Info

Publication number
US3702412A
US3702412A US153769A US3702412DA US3702412A US 3702412 A US3702412 A US 3702412A US 153769 A US153769 A US 153769A US 3702412D A US3702412D A US 3702412DA US 3702412 A US3702412 A US 3702412A
Authority
US
United States
Prior art keywords
electron
curtain
density
cathode
grid
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
US153769A
Inventor
Bertram S Quintal
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.)
Fleet National Bank
Original Assignee
Energy Sciences 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 Energy Sciences Inc filed Critical Energy Sciences Inc
Application granted granted Critical
Publication of US3702412A publication Critical patent/US3702412A/en
Assigned to FLEET NATIONAL BANK reassignment FLEET NATIONAL BANK ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ENERGY SCIENCES INC., A CORP. OF NY
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement or ion-optical arrangement
    • H01J37/06—Electron sources; Electron guns
    • H01J37/063—Geometrical arrangement of electrodes for beam-forming
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J33/00—Discharge tubes with provision for emergence of electrons or ions from the vessel; Lenard tubes

Definitions

  • ABSTRACT This disclosure deals with the shaping of a longitudinal space-charge-limited line of electrons into a substantially uniform electron density curtain, accelerating the same along field lines that expand the curtain, and
  • the present invention relates to apparatus for and methods of producing an energetic electron curtain, being more particularly, though not exclusively, directed to the electron irradiating of relatively long articles.
  • a further object of the invention is to provide a novel apparatus for and method of producing energetic electrons of more general utility, as well.
  • the invention contemplates, in one of its broad aspects, the shaping of a longitudinal space-charge-limited line of electrons into a substantially uniform electron density curtain, accelerating the same along field lines that expand the curtain, and then passing the expanded curtain through a longitudinal window for irradiation purposes and the like.
  • FIGURE is an isometric view of a preferred apparatus operating in accordance with the method of the invention, with regions partly broken away to illustrate details of construction.
  • a longitudinal cathode is shown at 1 in the form of a tungsten or other electronemitting line filament or indirectly heated strip or the the like, suspended from a gun structure or channel 3 provided with heat shielding walls 5, as of, for example, multifoil thermal barrier as made by Therrnoelectron Corporation, Waltham, Massachusetts, and described in their 1970 catalogue, Multi-Foil Thermal Insulation.”
  • the channel 3 is provided at the bottom with a control grid 7 extending longitudinally parallel to and coextensively with the cathode l and transversely thereof to the walls of the channel structure 3.
  • the electrons leaving the different-temperature portions of the cathode 1 become space-charge limited such that a substantially longitudinally uniform charge-density beam is emitted through the grid 7, but usually with a non-uniform transverse charge density of greater density centrally under the cathode 1 than transversely at the sides thereof near the walls 5 of the channel structure 3.
  • This beam is shaped by a preferably coaxially surrounding cylindrical electrostatic shield or Faraday cage structure 11 substantially axially containing the cathode 1 and having a further longitudinal grid structure l3 aligned with the cathode 1 and control grid 7.
  • This cage structure 11 is supported by a dielectric structure such as the vacuum feed through bushing. With an appropriate positive potential applied at 11 with respect to the control grid 7, the non-uniform transverse charge density become converted into a substantially uniform electron curtain.
  • An anode-cylinder l5 coaxially surrounds the cage 11, with the whole system vacuum-sealed at 2, and the anode cylinder contains a longitudinal electron-pervious window 17, as of aluminum, aligned with the control and further grid structures 7 and 13.
  • the anode structure 1517 is maintained at an accelerating potential above the cage 1 1, though grounded to avoid shock hazard.
  • the radial lines of the voltage gradient or field thus set up between the cylinders 11 and 15 (or other geometrical configurations, if used) will cause the electron curtain at the further grid 13 to expand in the gap or space between 11 and 15 along the radial lines of force, broadening the electron curtain so as uniformly and simultaneously to irradiate, through the window 17, all parts of cor responding longitudinal or long-dimension objects-tobe-treated (not shown), carried transversely past the window 17 by a conveyor or other mechanism 19, in the direction of the arrow.
  • the uniform current density of the expanded energetic electron curtain at the window 17 will be determined substantially by the electron distribution at the beam-shaping grid 13, and substantially independent of the accelerating potential, the large field of which only serves to expand and accelerate the electron curtain.
  • .amperes/cm. may be obtained with a control grid-to-cathode potential of about -20 volts, a beam-shaping grid potential of from about +800 to 1,000 volts, and an accelerating potential between the grounded anode and window structure 15-17 (about 8 inches in diameter) of about kilovolts.
  • a 6-inch long tungsten filament cathode 1 very long compared to the approximately 0.010 inch width thereof, a 6-inch long control grid 7 about onefourth inch wide, a 6-inch long beam-forming grid 13 about one-half inch wide, a 6-inch long wider window 17 (about l-inch in width) for receiving the expanded curtain, current density uniformity of i percent and better has been obtained over about a 6-inch beam width.
  • Apparatus for producing a curtain of energetic electrons having, in combination, a longitudinally extending electron-emitting cathode, a control grid structure positioned on one side of the cathode and extending longitudinally therealong and transversely thereacross, means for applying a space-charge limiting potential between the cathode and control grid to generate at the egress of the control grid a longitudinally extending electron beam substantially uniform in density longitudinally but non-uniform transversely with substantially greater density centrally than transversely to the sides, a Faraday cage structure surrounding the cathode and control grid and provided with a further grid substantially aligned with the cathode and control grid for shaping the non-uniform transverse electron beam density into a substantially uniform density curtain, an anode structure surrounding the Faraday cage structure and having an electron-pervious window substantially aligned with the control and further grids, and means for establishing an accelerating-voltage gradient field between the further grid and the window such that the substantially uniform density electron curtain may expand along
  • a method of energetic electron beam irradiation that comprises, simultaneously emitting electrons along space-charge limiting the emitted electrons to produce a longitudinally extending electron beam substantially uniform in density longitudinally, but non-uniform transversely, shaping the longitudinal electron beam to convert the non-uniform transverse beam density thereof into a substantially uniform density electron curtain, directing said curtain into an accelerating electric field to expand the electron curtain along the lines of said field, and ejecting t e x ded electron cu ain w'th a current densit d istrib n determined su stantially by the electro distribution just prior to expansion.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Particle Accelerators (AREA)

Abstract

This disclosure deals with the shaping of a longitudinal spacecharge-limited line of electrons into a substantially uniform electron density curtain, accelerating the same along field lines that expand the curtain, and then passing the expanded curtain through a longitudinal window for irradiation purposes and the like.

Description

United States Patent Quintal [451 Nov. 7, 1972 [541 APPARATUS FOR AND METHOD OF PRODUCING AN ENERGETIC ELECTRON CURTAIN [72] Inventor: Bertram S. Quintal, Peabody, Mass.
[73] Assignee: Energy Sciences, Inc., Burlington,
Mass.
221 Filed: June 16, 1971 21 App1.No.: 153,769
521 u.s.c|. ..313/299,313/74,313/s3, 315/39, 328/233 [51] Int. Cl ..H01j 33/00, HOlj 33/04, HOlj 1/46 [58] Field of Search ..3l5/39; 313/82 NC, 83, 74, 313/299; 328/233 [56] References Cited UNITED STATES PATENTS 2,887,599 5/1959 Trump ..3l3/74 3,099,762 7/1963 Hertz ..3l3/74 Primary Examiner-David Schonberg Assistant ExaminerPaul A. Sacher Attorney-David Rines et a1.
[57] ABSTRACT This disclosure deals with the shaping of a longitudinal space-charge-limited line of electrons into a substantially uniform electron density curtain, accelerating the same along field lines that expand the curtain, and
then passing the expanded curtain through a longitudinal window for irradiation purposes and the like.
7 Claims, 1 Drawing Figure APPARATUS FOR AND METHOD OF PRODUCING AN ENERGETIC ELECTRON CURTAIN The present invention relates to apparatus for and methods of producing an energetic electron curtain, being more particularly, though not exclusively, directed to the electron irradiating of relatively long articles.
In order to enable the electron beam irradiation of articles of substantial dimensions, resort has been had to scanning a focused beam along such dimensions as described, for example, in The Industrial Electron Processing System, High Voltage Engineering Corporation Catalogue 5/69. Such techniques not only require scanning or deflection apparatus and driving circuits therefor, but require collimating or focusing structures, as well, to produce a defined beam that can be scanned. In addition, though scanning may be effected rapidly, all parts of the objects are not actually simultaneously irradiated, and difi'erences in electron density are produced in different positions of the scan in view of different path lengths of the beam. It has also been proposed, accordingly, to produce a strip or line of electrons to enable simultaneity of irradiation, as, for example, in US. Pat. No. 2,887,599 to Trump; but such proposals have not proven practical because of variation of electron emission at different points of the long cathode, in view of inherently different points of the long cathode, in view of inherently different tem-- peratures therealong, and in view of wide variation in current density along the line of electrons.
It is to the solution of the problem of providing a substantially uniform density, longitudinally extending, high energy electron curtain, not subject to the above disadvantages, that the present invention is accordingly primarily directed.
A further object of the invention is to provide a novel apparatus for and method of producing energetic electrons of more general utility, as well.
Other and further objects will be explained hereinafter and are more particularly delineated in the appended claims. In summary, the invention contemplates, in one of its broad aspects, the shaping of a longitudinal space-charge-limited line of electrons into a substantially uniform electron density curtain, accelerating the same along field lines that expand the curtain, and then passing the expanded curtain through a longitudinal window for irradiation purposes and the like.
The invention will now be described with reference to the accompanying drawing, the single FIGURE of which is an isometric view of a preferred apparatus operating in accordance with the method of the invention, with regions partly broken away to illustrate details of construction.
Referring to the drawing, a longitudinal cathode is shown at 1 in the form of a tungsten or other electronemitting line filament or indirectly heated strip or the the like, suspended from a gun structure or channel 3 provided with heat shielding walls 5, as of, for example, multifoil thermal barrier as made by Therrnoelectron Corporation, Waltham, Massachusetts, and described in their 1970 catalogue, Multi-Foil Thermal Insulation." The channel 3 is provided at the bottom with a control grid 7 extending longitudinally parallel to and coextensively with the cathode l and transversely thereof to the walls of the channel structure 3. By controlling the potential applied between the control grid 7 and the cathode 1, which can be achieved easily via low voltage control connections which pass within the high voltage connection tube 20, such that the former is negative with respect to the latter, the electrons leaving the different-temperature portions of the cathode 1 become space-charge limited such that a substantially longitudinally uniform charge-density beam is emitted through the grid 7, but usually with a non-uniform transverse charge density of greater density centrally under the cathode 1 than transversely at the sides thereof near the walls 5 of the channel structure 3.
This beam is shaped by a preferably coaxially surrounding cylindrical electrostatic shield or Faraday cage structure 11 substantially axially containing the cathode 1 and having a further longitudinal grid structure l3 aligned with the cathode 1 and control grid 7. This cage structure 11 is supported by a dielectric structure such as the vacuum feed through bushing. With an appropriate positive potential applied at 11 with respect to the control grid 7, the non-uniform transverse charge density become converted into a substantially uniform electron curtain. An anode-cylinder l5 coaxially surrounds the cage 11, with the whole system vacuum-sealed at 2, and the anode cylinder contains a longitudinal electron-pervious window 17, as of aluminum, aligned with the control and further grid structures 7 and 13. The anode structure 1517 is maintained at an accelerating potential above the cage 1 1, though grounded to avoid shock hazard. The radial lines of the voltage gradient or field thus set up between the cylinders 11 and 15 (or other geometrical configurations, if used) will cause the electron curtain at the further grid 13 to expand in the gap or space between 11 and 15 along the radial lines of force, broadening the electron curtain so as uniformly and simultaneously to irradiate, through the window 17, all parts of cor responding longitudinal or long-dimension objects-tobe-treated (not shown), carried transversely past the window 17 by a conveyor or other mechanism 19, in the direction of the arrow. With this structure wherein the longitudinal dimension of the electron curtain is very large compared with the cathode-to-window separation, and with appropriate potentials, as later illustrated, the uniform current density of the expanded energetic electron curtain at the window 17 will be determined substantially by the electron distribution at the beam-shaping grid 13, and substantially independent of the accelerating potential, the large field of which only serves to expand and accelerate the electron curtain.
As an example of practical apparatus of this design, energetic electron curtains of uniform current density of from 200 to 2,000;|.amperes/cm. may be obtained with a control grid-to-cathode potential of about -20 volts, a beam-shaping grid potential of from about +800 to 1,000 volts, and an accelerating potential between the grounded anode and window structure 15-17 (about 8 inches in diameter) of about kilovolts. With a 6-inch long tungsten filament cathode 1, very long compared to the approximately 0.010 inch width thereof, a 6-inch long control grid 7 about onefourth inch wide, a 6-inch long beam-forming grid 13 about one-half inch wide, a 6-inch long wider window 17 (about l-inch in width) for receiving the expanded curtain, current density uniformity of i percent and better has been obtained over about a 6-inch beam width.
Further modifications will occur to those skilled in this art, and all such are considered to fall within the spirit and scope of the invention as defined in the appended claims.
What is claimed is:
1. Apparatus for producing a curtain of energetic electrons having, in combination, a longitudinally extending electron-emitting cathode, a control grid structure positioned on one side of the cathode and extending longitudinally therealong and transversely thereacross, means for applying a space-charge limiting potential between the cathode and control grid to generate at the egress of the control grid a longitudinally extending electron beam substantially uniform in density longitudinally but non-uniform transversely with substantially greater density centrally than transversely to the sides, a Faraday cage structure surrounding the cathode and control grid and provided with a further grid substantially aligned with the cathode and control grid for shaping the non-uniform transverse electron beam density into a substantially uniform density curtain, an anode structure surrounding the Faraday cage structure and having an electron-pervious window substantially aligned with the control and further grids, and means for establishing an accelerating-voltage gradient field between the further grid and the window such that the substantially uniform density electron curtain may expand along the lines of the field and pass through the window with a current density distribution at the window determined substantially by the electron distribution at the further grid.
2. Apparatus as claimed in claim 1 and in which the said potential applying means maintains the said cona longitudinal line,
trol grid negative with respect to the cathode and the said anode structure is grounded but at positive potential with respect to the said further grid.
3. Apparatus as claimed in claim 1 and in which the said Faraday cage structure and the surrounding anode structure are cylindrically substantially coaxially disposed.
4. Apparatus as claimed in claim 1 and in which means is provided for carrying objects with longitudinal dimensions corresponding to that of the window past the same in order to permit substantially uniform and simultaneous longitudinal energetic electron irradiation by the electron curtain.
5. Apparatus as claimed in claim 1 and in which the longitudinal dimension of said curtain is large compared with the distance between the control grid and anode structure.
6. A method of energetic electron beam irradiation, that comprises, simultaneously emitting electrons along space-charge limiting the emitted electrons to produce a longitudinally extending electron beam substantially uniform in density longitudinally, but non-uniform transversely, shaping the longitudinal electron beam to convert the non-uniform transverse beam density thereof into a substantially uniform density electron curtain, directing said curtain into an accelerating electric field to expand the electron curtain along the lines of said field, and ejecting t e x ded electron cu ain w'th a current densit d istrib n determined su stantially by the electro distribution just prior to expansion.
7. A method as claimed in claim 6 and in which said accelerating electric field lines are set up in the pattern of radial lines between cylindrical surfaces such that the electron curtain expands along said radial lines.

Claims (7)

1. Apparatus for producing a curtain of energetic electrons having, in combination, a longitudinally extending electronemitting cathode, a control grid structure positioned on one side of the cathode and extending longitudinally therealong and transversely thereacross, means for applying a space-charge limiting potential between the cathode and control grid to generate at the egress of the control grid a longitudinally extending electron beam substantially uniform in density longitudinally but non-uniform transversely with substantially greater density centrally than transversely to the sides, a Faraday cage structure surrounding the cathode and control grid and provided with a further grid substantially aligned with the cathode and control grid for shaping the non-uniform transverse electron beam density into a substantially uniform density curtain, an anode structure surrounding the Faraday cage structure and having an electron-pervious window substantially aligned with the control and further grids, and means for establishing an accelerating-voltage gradient field between the further grid and the window such that the substantially uniform density electron curtain may expand along the lines of the field and pass through the window with a current density distribution at the window determined substantially by the electron distribution at the further grid.
2. Apparatus as claimed in claim 1 and in which the said potential applying means maintains the said control grid negative with respect to the cathode and the said anode structure is grounded but at positive potential with respect to the said further grid.
3. Apparatus as claimed in claim 1 and in which the said Faraday cage structure and the surrounding anode structure are cylindrically substantially coaxially disposed.
4. Apparatus as claimed in claim 1 and in which means is provided for carrying objects with longitudinal dimensions corresponding to that of the window past the same in order to permit substantially uniform and simultaneous longitudinal energetic electron irradiation by the electron curtain.
5. Apparatus as claimed in claim 1 and in which the longitudinal dimension of said curtain is large compared with the distance between the control grid and anode structure.
6. A method of energetic electron beam irradiation, that comprises, simultaneously emitting electrons along a longitudinal line, space-charge limiting the emitted electrons to produce a longitudinally extending electron beam substantially uniform in density longitudinally, but non-uniform transversely, shaping the longitudinal electron beam to convert the non-uniform transverse beam density thereof into a substantially uniform density electron curtain, directing said curtain into an accelerating electric field to expand the electron curtain along the lines of said field, and ejecting the expanded electron curtain with a current density distribution determined substantially by the electron distribution just prior to expansion.
7. A method as claimed in claim 6 and in which said accelerating electric field lines are set up in the pattern of radial lines between cylindrical surfaces such that the electron curtain expands along said radial lines.
US153769A 1971-06-16 1971-06-16 Apparatus for and method of producing an energetic electron curtain Expired - Lifetime US3702412A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15376971A 1971-06-16 1971-06-16

Publications (1)

Publication Number Publication Date
US3702412A true US3702412A (en) 1972-11-07

Family

ID=22548668

Family Applications (1)

Application Number Title Priority Date Filing Date
US153769A Expired - Lifetime US3702412A (en) 1971-06-16 1971-06-16 Apparatus for and method of producing an energetic electron curtain

Country Status (5)

Country Link
US (1) US3702412A (en)
JP (1) JPS5710542B1 (en)
CA (1) CA963182A (en)
DE (1) DE2229825C3 (en)
GB (1) GB1356861A (en)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048534A (en) * 1976-03-25 1977-09-13 Hughes Aircraft Company Radial flow electron gun
DE2823205A1 (en) * 1978-05-25 1979-11-29 Energy Sciences Inc Appts. generating longitudinal strips of energetic electron beams - has slotted conductive cylinders concentrically mounted around cathode for electrostatic shielding and aperture lens focusing
FR2428913A1 (en) * 1978-06-15 1980-01-11 Energy Sciences Inc Appts. generating longitudinal strips of energetic electron beams - has slotted conductive cylinders concentrically mounted around cathode for electrostatic shielding and aperture lens focusing
EP0011414A1 (en) * 1978-11-03 1980-05-28 Tetra Laval Holdings & Finance SA Process and apparatus for electron beam irradiation of surfaces
US4246297A (en) * 1978-09-06 1981-01-20 Energy Sciences Inc. Process and apparatus for the curing of coatings on sensitive substrates by electron irradiation
FR2471043A1 (en) * 1979-11-28 1981-06-12 Inst Elektrofizicheskoi Appa Electron irradiation device for webs - protected by curved housing covering drum opposite electron beam window
US4273831A (en) * 1978-09-01 1981-06-16 Kemtec, Inc. Powdered polymer compositions produced by electron beam polymerization of polymerizable compositions
EP0056179A1 (en) * 1981-01-12 1982-07-21 Sony Corporation Process and apparatus for converged fine line electron beam treatment of objects
US4367412A (en) * 1978-11-03 1983-01-04 Tetra Pak Developpement Sa Process of and apparatus for cold-cathode electron-beam generation for sterilization of surfaces and similar applications
US4410263A (en) * 1982-03-01 1983-10-18 Eastman Kodak Company Sheet handling device for image transfer in an electrographic copier
US4439686A (en) * 1980-09-16 1984-03-27 Tetra Pak Developpement Ltd. Electron beam-irradiating apparatus with conical bushing seal-support
US4490409A (en) * 1982-09-07 1984-12-25 Energy Sciences, Inc. Process and apparatus for decorating the surfaces of electron irradiation cured coatings on radiation-sensitive substrates
US4559102A (en) * 1983-05-09 1985-12-17 Sony Corporation Method for recrystallizing a polycrystalline, amorphous or small grain material
US4591756A (en) * 1985-02-25 1986-05-27 Energy Sciences, Inc. High power window and support structure for electron beam processors
US4592799A (en) * 1983-05-09 1986-06-03 Sony Corporation Method of recrystallizing a polycrystalline, amorphous or small grain material
US4642244A (en) * 1986-03-03 1987-02-10 Energy Sciences Inc. Method of and apparatus for electron beam curing coated, porous and other web structures
US4652763A (en) * 1985-03-29 1987-03-24 Energy Sciences, Inc. Electron-beam irradiation sterilization process
US4703256A (en) * 1983-05-09 1987-10-27 Sony Corporation Faraday cups
WO1990009030A1 (en) * 1989-02-02 1990-08-09 Oy Tampella Ab A method of producing high-energy electtron curtains with high performance
US4983849A (en) * 1989-06-05 1991-01-08 Radiation Dynamics, Inc. Apparatus and method for promoting uniform dosage of ionizing radiation in targets
US5120972A (en) * 1990-12-11 1992-06-09 Energy Sciences, Inc. Method of and apparatus for improved nitrogen inerting of surfaces to be electron beam irradiated
US5126633A (en) * 1991-07-29 1992-06-30 Energy Sciences Inc. Method of and apparatus for generating uniform elongated electron beam with the aid of multiple filaments
US5194742A (en) * 1992-01-21 1993-03-16 Energy Sciences Inc. Method of and apparatus for shielding electron and other particle beam accelerators
EP0549113A1 (en) * 1991-11-22 1993-06-30 Energy Sciences Inc. Parallel filament electron gun
US5236159A (en) * 1991-12-30 1993-08-17 Energy Sciences Inc. Filament clip support
EP0584443A1 (en) * 1992-08-22 1994-03-02 Leybold Aktiengesellschaft Process and apparatus for continuous vacuum coating of non-conductive sheets
US6210516B1 (en) 1994-02-18 2001-04-03 Ronald Sinclair Nohr Process of enhanced chemical bonding by electron seam radiation
US20030161969A1 (en) * 2002-02-26 2003-08-28 Hilliard Donald Bennett Electron-assisted deposition process and apparatus
US20090156079A1 (en) * 2007-12-14 2009-06-18 Kimberly-Clark Worldwide, Inc. Antistatic breathable nonwoven laminate having improved barrier properties
US20100159195A1 (en) * 2008-12-24 2010-06-24 Quincy Iii Roger B High repellency materials via nanotopography and post treatment
CN102196655A (en) * 2010-03-11 2011-09-21 嘉兴兆泓科技有限公司 Multi-filament wide-beam electronic curtain
EP0950256B2 (en) † 1997-01-02 2014-07-23 Hitachi Zosen Corporation Electron beam accelerator
US9076633B2 (en) 2011-07-04 2015-07-07 Tetra Laval Holdings & Finance S.A. Electron-beam device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI70346C (en) * 1983-05-03 1986-09-15 Enso Gutzeit Oy ANORDNING FOER AOSTADKOMMANDE AV EN ELEKTRONRIDAO
GB2251631B (en) * 1990-12-19 1994-10-12 Mitsubishi Electric Corp Thin-film forming apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887599A (en) * 1957-06-17 1959-05-19 High Voltage Engineering Corp Electron acceleration tube
US3099762A (en) * 1962-01-15 1963-07-30 Hertz Michael Cathode ray tube using replaceable cathode

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887599A (en) * 1957-06-17 1959-05-19 High Voltage Engineering Corp Electron acceleration tube
US3099762A (en) * 1962-01-15 1963-07-30 Hertz Michael Cathode ray tube using replaceable cathode

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048534A (en) * 1976-03-25 1977-09-13 Hughes Aircraft Company Radial flow electron gun
DE2823205A1 (en) * 1978-05-25 1979-11-29 Energy Sciences Inc Appts. generating longitudinal strips of energetic electron beams - has slotted conductive cylinders concentrically mounted around cathode for electrostatic shielding and aperture lens focusing
FR2428913A1 (en) * 1978-06-15 1980-01-11 Energy Sciences Inc Appts. generating longitudinal strips of energetic electron beams - has slotted conductive cylinders concentrically mounted around cathode for electrostatic shielding and aperture lens focusing
US4273831A (en) * 1978-09-01 1981-06-16 Kemtec, Inc. Powdered polymer compositions produced by electron beam polymerization of polymerizable compositions
US4246297A (en) * 1978-09-06 1981-01-20 Energy Sciences Inc. Process and apparatus for the curing of coatings on sensitive substrates by electron irradiation
EP0011414A1 (en) * 1978-11-03 1980-05-28 Tetra Laval Holdings & Finance SA Process and apparatus for electron beam irradiation of surfaces
EP0054016A2 (en) 1978-11-03 1982-06-16 Tetra Laval Holdings & Finance SA Apparatus for electron-beam irradiation of surfaces
US4367412A (en) * 1978-11-03 1983-01-04 Tetra Pak Developpement Sa Process of and apparatus for cold-cathode electron-beam generation for sterilization of surfaces and similar applications
FR2471043A1 (en) * 1979-11-28 1981-06-12 Inst Elektrofizicheskoi Appa Electron irradiation device for webs - protected by curved housing covering drum opposite electron beam window
US4439686A (en) * 1980-09-16 1984-03-27 Tetra Pak Developpement Ltd. Electron beam-irradiating apparatus with conical bushing seal-support
EP0056179A1 (en) * 1981-01-12 1982-07-21 Sony Corporation Process and apparatus for converged fine line electron beam treatment of objects
US4410263A (en) * 1982-03-01 1983-10-18 Eastman Kodak Company Sheet handling device for image transfer in an electrographic copier
US4490409A (en) * 1982-09-07 1984-12-25 Energy Sciences, Inc. Process and apparatus for decorating the surfaces of electron irradiation cured coatings on radiation-sensitive substrates
US4844764A (en) * 1982-09-07 1989-07-04 Energy Sciences Inc. Process of in-line coating and decorative-layer lamination with panel board material employing electron beam irradiation
US4559102A (en) * 1983-05-09 1985-12-17 Sony Corporation Method for recrystallizing a polycrystalline, amorphous or small grain material
US4592799A (en) * 1983-05-09 1986-06-03 Sony Corporation Method of recrystallizing a polycrystalline, amorphous or small grain material
US4703256A (en) * 1983-05-09 1987-10-27 Sony Corporation Faraday cups
US4591756A (en) * 1985-02-25 1986-05-27 Energy Sciences, Inc. High power window and support structure for electron beam processors
US4652763A (en) * 1985-03-29 1987-03-24 Energy Sciences, Inc. Electron-beam irradiation sterilization process
US4642244A (en) * 1986-03-03 1987-02-10 Energy Sciences Inc. Method of and apparatus for electron beam curing coated, porous and other web structures
WO1990009030A1 (en) * 1989-02-02 1990-08-09 Oy Tampella Ab A method of producing high-energy electtron curtains with high performance
US5175436A (en) * 1989-02-02 1992-12-29 Oy Tampella Ab Method of producing high-energy electron curtains with high performance
US4983849A (en) * 1989-06-05 1991-01-08 Radiation Dynamics, Inc. Apparatus and method for promoting uniform dosage of ionizing radiation in targets
US5120972A (en) * 1990-12-11 1992-06-09 Energy Sciences, Inc. Method of and apparatus for improved nitrogen inerting of surfaces to be electron beam irradiated
US5126633A (en) * 1991-07-29 1992-06-30 Energy Sciences Inc. Method of and apparatus for generating uniform elongated electron beam with the aid of multiple filaments
EP0549113A1 (en) * 1991-11-22 1993-06-30 Energy Sciences Inc. Parallel filament electron gun
US5254911A (en) * 1991-11-22 1993-10-19 Energy Sciences Inc. Parallel filament electron gun
US5236159A (en) * 1991-12-30 1993-08-17 Energy Sciences Inc. Filament clip support
US5194742A (en) * 1992-01-21 1993-03-16 Energy Sciences Inc. Method of and apparatus for shielding electron and other particle beam accelerators
EP0584443A1 (en) * 1992-08-22 1994-03-02 Leybold Aktiengesellschaft Process and apparatus for continuous vacuum coating of non-conductive sheets
US6210516B1 (en) 1994-02-18 2001-04-03 Ronald Sinclair Nohr Process of enhanced chemical bonding by electron seam radiation
EP0950256B2 (en) † 1997-01-02 2014-07-23 Hitachi Zosen Corporation Electron beam accelerator
US20030161969A1 (en) * 2002-02-26 2003-08-28 Hilliard Donald Bennett Electron-assisted deposition process and apparatus
US7931787B2 (en) 2002-02-26 2011-04-26 Donald Bennett Hilliard Electron-assisted deposition process and apparatus
US20090156079A1 (en) * 2007-12-14 2009-06-18 Kimberly-Clark Worldwide, Inc. Antistatic breathable nonwoven laminate having improved barrier properties
WO2009077889A1 (en) 2007-12-14 2009-06-25 Kimberly-Clark Worldwide, Inc. Antistatic breathable nonwoven laminate having improved barrier properties
US20100159195A1 (en) * 2008-12-24 2010-06-24 Quincy Iii Roger B High repellency materials via nanotopography and post treatment
CN102196655A (en) * 2010-03-11 2011-09-21 嘉兴兆泓科技有限公司 Multi-filament wide-beam electronic curtain
CN102196655B (en) * 2010-03-11 2013-05-01 嘉兴兆泓科技有限公司 Multi-filament wide-beam electronic curtain
US9076633B2 (en) 2011-07-04 2015-07-07 Tetra Laval Holdings & Finance S.A. Electron-beam device

Also Published As

Publication number Publication date
DE2229825B2 (en) 1975-12-04
JPS5710542B1 (en) 1982-02-26
CA963182A (en) 1975-02-18
DE2229825A1 (en) 1972-12-21
GB1356861A (en) 1974-06-19
DE2229825C3 (en) 1980-11-06

Similar Documents

Publication Publication Date Title
US3702412A (en) Apparatus for and method of producing an energetic electron curtain
US3769600A (en) Method of and apparatus for producing energetic charged particle extended dimension beam curtains and pulse producing structures therefor
US3749967A (en) Electron beam discharge device
US2363359A (en) Electron microscope
US3780334A (en) Vacuum tube for generating a wide beam of fast electrons
US3138729A (en) Ultra-soft X-ray source
US3381157A (en) Annular hollow cathode discharge apparatus
US2816243A (en) Negative ion source
SE8700017D0 (en) ION PLASMA ELECTRON GUN
DE3833604A1 (en) Pulsed particle source on the basis of rapidly repolarisable ferroelectrics
US3783325A (en) Field effect electron gun having at least a million emitting fibers per square centimeter
JP2724464B2 (en) Ion source device
Yang et al. Time evolution of the two-dimensional expansion velocity distributions of the cathode plasma in pulsed high-power diodes
US3514664A (en) Electron guns
US3353107A (en) High voltage particle accelerators using charge transfer processes
US3182175A (en) Electron beam heating device
US3621327A (en) Method of controlling the intensity of an electron beam
GB1166051A (en) Improvements in or relating to Flash X-Ray Generation Methods and Apparatus
Bayless Plasma‐cathode electron gun
US3292041A (en) Multistage type high voltage electron gun with controllable electrode spacing
US3731089A (en) Mass spectrometer ion source having means for rapidly expelling ions from the source and method of operation
US2931903A (en) Acceleration and application of high intensity electron beams for radiation processing
US3795837A (en) Electron guns
US2697788A (en) Ion source
US3327148A (en) Mirror-type electron gun

Legal Events

Date Code Title Description
AS Assignment

Owner name: FLEET NATIONAL BANK,RHODE ISLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ENERGY SCIENCES INC., A CORP. OF NY;REEL/FRAME:004760/0330

Effective date: 19870423

Owner name: FLEET NATIONAL BANK, 111 WESTMINSTER ST., PROVIDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ENERGY SCIENCES INC., A CORP. OF NY;REEL/FRAME:004760/0330

Effective date: 19870423

STCF Information on status: patent grant

Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)