SE314448B - - Google Patents

Info

Publication number
SE314448B
SE314448B SE894363A SE894363A SE314448B SE 314448 B SE314448 B SE 314448B SE 894363 A SE894363 A SE 894363A SE 894363 A SE894363 A SE 894363A SE 314448 B SE314448 B SE 314448B
Authority
SE
Sweden
Prior art keywords
aperture
layer
aug
narrowing
lead
Prior art date
Application number
SE894363A
Inventor
R Wideroe
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Publication of SE314448B publication Critical patent/SE314448B/xx

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators

Abstract

1,011,172. Electron beam apparatus; electrode materials. BROWN, BOVERI & CO. Ltd. Aug. 15, 1963 [Aug. 17, 1962], No. 32289/63. Heading H1D. In an arrangement for producing a confined electron beam 3 including a collimator comprising an apertuted layer 1 of a metal of low atomic number and an apertured layer 2 of a metal having a high atomic number, the aperture-defining surface at the beam entrance side is located further from the beam axis 4 than the aperture-defining surface at the beam emergence side. Layer 1 may be of aluminium and layer 2 of lead, tungsten, or lead with a tungsten insert. As alternatives to the stepped arrangement of two widening apertures shown, the aperture-defining surfaces may be continuous so as to define an aperture narrowing in the direction of the beam, or a stepped arrangement of a narrowing and a widening aperture may be employed (Figs. 2 to 4, not shown).
SE894363A 1962-08-17 1963-08-15 SE314448B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH986862A CH394411A (en) 1962-08-17 1962-08-17 Collimator for beams of fast electrons

Publications (1)

Publication Number Publication Date
SE314448B true SE314448B (en) 1969-09-08

Family

ID=4356551

Family Applications (1)

Application Number Title Priority Date Filing Date
SE894363A SE314448B (en) 1962-08-17 1963-08-15

Country Status (3)

Country Link
CH (1) CH394411A (en)
GB (1) GB1011172A (en)
SE (1) SE314448B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325335B (en) * 1997-05-16 2001-07-11 Leica Lithography Systems Ltd Electron beam aperture element

Also Published As

Publication number Publication date
CH394411A (en) 1965-06-30
GB1011172A (en) 1965-11-24

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