GB908483A - Improvements in and relating to electron beam furnaces - Google Patents

Improvements in and relating to electron beam furnaces

Info

Publication number
GB908483A
GB908483A GB1533158A GB1533158A GB908483A GB 908483 A GB908483 A GB 908483A GB 1533158 A GB1533158 A GB 1533158A GB 1533158 A GB1533158 A GB 1533158A GB 908483 A GB908483 A GB 908483A
Authority
GB
United Kingdom
Prior art keywords
cathode
hearth
aperture
electron beam
anode
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
GB1533158A
Inventor
Michael Crowle Crowley-Milling
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB1533158A priority Critical patent/GB908483A/en
Publication of GB908483A publication Critical patent/GB908483A/en
Expired legal-status Critical Current

Links

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
    • H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
    • H01J37/305—Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating or etching

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

908,483. Electron beam apparatus. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. May 12, 1959 [May 13, 1958], No. 15331/58. Class 39 (1). Deflecting means 18 are provided in an electron beam furnace to bend the beam EB<SP>1</SP> on its path from the cathode 9 to the hearth 1 and so prevent bombardment of the cathode by particles which are ejected or evaporated from the material being heated, e.g. niobium. The deflecting means 18 may be electric or magnetic and may be mounted inside or outside the chamber 2. The hearth 1, e.g. of copper, may be cooled and may be movable for scanning purposes, or scanning may be effected by varying the energization of the deflecting means or the position thereof. A beam-shaping electrode 13 and an apertured anode 14 are mounted in the cathode chamber 6, or the wall surrounding an aperture 15a connecting the chambers 6 and 2 may serve as an anode. The cathode 9 and aperture 15a may be elongated and may correspond in length to the width of the hearth 1. Diffusion pumps 3 and 7 are connected to a backing system by pipes 16 and 17. The cathode 9 and anode 14 are connected to terminals T1 and T2 respectively. The Provisional Specification describes a furnace (Fig. 1, not shown) in which the cathode 9, aperture 15a and hearth 1 are arranged in a straight line, bombardment of the cathode being reduced by the restricted size of the aperture.
GB1533158A 1958-05-13 1958-05-13 Improvements in and relating to electron beam furnaces Expired GB908483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1533158A GB908483A (en) 1958-05-13 1958-05-13 Improvements in and relating to electron beam furnaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1533158A GB908483A (en) 1958-05-13 1958-05-13 Improvements in and relating to electron beam furnaces

Publications (1)

Publication Number Publication Date
GB908483A true GB908483A (en) 1962-10-17

Family

ID=10057204

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1533158A Expired GB908483A (en) 1958-05-13 1958-05-13 Improvements in and relating to electron beam furnaces

Country Status (1)

Country Link
GB (1) GB908483A (en)

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