US3388279A - Electron-beam gun - Google Patents

Electron-beam gun Download PDF

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Publication number
US3388279A
US3388279A US493154A US49315465A US3388279A US 3388279 A US3388279 A US 3388279A US 493154 A US493154 A US 493154A US 49315465 A US49315465 A US 49315465A US 3388279 A US3388279 A US 3388279A
Authority
US
United States
Prior art keywords
electron
emitter
gun
beam gun
guns
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
US493154A
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English (en)
Inventor
Charles R Kelly
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.)
United States Steel Corp
Original Assignee
United States Steel Corp
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 United States Steel Corp filed Critical United States Steel Corp
Priority to US493154A priority Critical patent/US3388279A/en
Priority to NL6613334A priority patent/NL6613334A/xx
Priority to GB42285/66A priority patent/GB1137527A/en
Priority to BE687591D priority patent/BE687591A/xx
Priority to FR78267A priority patent/FR1495326A/fr
Priority to DE19661565896 priority patent/DE1565896A1/de
Application granted granted Critical
Publication of US3388279A publication Critical patent/US3388279A/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
    • 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
    • H01J37/065—Construction of guns or parts thereof
    • 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

Definitions

  • An electron-beam gun including a thermionic emitter is provided 'with a trough-shaped bathe confining electron emission to a limited arc outwardly from the emitter.
  • the bafe is of hour--glass shape longitudinally, i.e., has its mid-portion drawn. in to a width less than that of the end portionsc This tends to correct non-uniform emission along the length of the emitter by reducing emission in the region where it would be greatest, without the use of the invention,
  • This invention relates to electron-beam guns and, in. particular, to an elongated g-un having provision for achieving a more uniform bombardment of the mass to be heated, along the length of the gun, than has been obtainable hereto-fore,
  • Electron-beam guns are now extensively used, prin-l cipally for heating material in vacuum processes.
  • industrial operations .now contemplated require the heatn ing of material. over a width. of several. feet, i.e. metal strip or the surface of a mass of molten metal to be vaporized
  • This necessitates elongated guns and, indeed, the end-to-end assembly of a plurality of guns.
  • An elongated gun 'with a straight tungsten wire as the thermionic electron emitter has the shortcoming that the density of elecrons emitted increases from both ends toward the center because of the cooling effect of the support means and current-supply connections As a result, the density of the electron-beam.
  • a high-voltage (negative) platform 14 is mounted on insulators 15 upstanding on base 10. Insulators 16 are mounted in pairs on platform 14 adjacent the ends thereof. Cross bars 17 of conducting metal join the insulators of each pair. Terminal clips 18 are secured, in alined the electron emitter, extends between them Current-2,
  • Angle brackets 20 secured to platform 14 support a trough-shaped open-ended backing electrode or shield 21 partially enclosing emitter 19.
  • the side walls of the shield are pinched. in or necked-down at the lmid-portion as indicated at 22.
  • the effect of this shape is to restrict somewhat the outflow of electrons from the emitter at its midportion, compared with the outow adjacent the ends thereof.
  • the shape of opening 13 approximates that of shield 21, being slightly larger than the latter overall
  • the necked-in mid-portion 22 of shield 21 narrows the exit for electrons passing from.
  • an electron-beam gun comprising a support, t/ern minals mounted thereon in spaced, relation, an electron emitter wire extending between terminals, and. a trough; shaped backing electrode mounted on the support between it and the wire, the sides of said electrode being pinched :in toward each. other adjacent the mid-portion of the wirec 2e
  • said support being a platform, a base having insulators thereon carying said platform, side walls extending upn Wardly from said base, and an accelerating anode sheet extending between said side. walls,

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electron Sources, Ion Sources (AREA)
US493154A 1965-10-05 1965-10-05 Electron-beam gun Expired - Lifetime US3388279A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US493154A US3388279A (en) 1965-10-05 1965-10-05 Electron-beam gun
NL6613334A NL6613334A (enrdf_load_html_response) 1965-10-05 1966-09-21
GB42285/66A GB1137527A (en) 1965-10-05 1966-09-22 Electron beam gun
BE687591D BE687591A (enrdf_load_html_response) 1965-10-05 1966-09-29
FR78267A FR1495326A (fr) 1965-10-05 1966-09-30 Canon à faisceau d'électrons
DE19661565896 DE1565896A1 (de) 1965-10-05 1966-10-04 Elektronenstrahlkanone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US493154A US3388279A (en) 1965-10-05 1965-10-05 Electron-beam gun

Publications (1)

Publication Number Publication Date
US3388279A true US3388279A (en) 1968-06-11

Family

ID=23959127

Family Applications (1)

Application Number Title Priority Date Filing Date
US493154A Expired - Lifetime US3388279A (en) 1965-10-05 1965-10-05 Electron-beam gun

Country Status (5)

Country Link
US (1) US3388279A (enrdf_load_html_response)
BE (1) BE687591A (enrdf_load_html_response)
DE (1) DE1565896A1 (enrdf_load_html_response)
GB (1) GB1137527A (enrdf_load_html_response)
NL (1) NL6613334A (enrdf_load_html_response)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473072A (en) * 1967-03-01 1969-10-14 Nikolai Dmitrievich Ivano Mount for electric vacuum devices

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532956A (en) * 1946-12-31 1950-12-05 Jr John A Simpson Air proportional counter
US3286117A (en) * 1963-01-07 1966-11-15 Stauffer Chemical Co Linearly expandable filament for electron gun structure
US3300676A (en) * 1963-01-07 1967-01-24 Stauffer Chemical Co Filament tensioning device for electron gun structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532956A (en) * 1946-12-31 1950-12-05 Jr John A Simpson Air proportional counter
US3286117A (en) * 1963-01-07 1966-11-15 Stauffer Chemical Co Linearly expandable filament for electron gun structure
US3300676A (en) * 1963-01-07 1967-01-24 Stauffer Chemical Co Filament tensioning device for electron gun structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473072A (en) * 1967-03-01 1969-10-14 Nikolai Dmitrievich Ivano Mount for electric vacuum devices

Also Published As

Publication number Publication date
BE687591A (enrdf_load_html_response) 1967-03-29
NL6613334A (enrdf_load_html_response) 1967-04-06
DE1565896A1 (de) 1970-05-14
GB1137527A (en) 1968-12-27

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