GB964066A - Improvements in or relating to magnetic lens systems - Google Patents

Improvements in or relating to magnetic lens systems

Info

Publication number
GB964066A
GB964066A GB43826/62A GB4382662A GB964066A GB 964066 A GB964066 A GB 964066A GB 43826/62 A GB43826/62 A GB 43826/62A GB 4382662 A GB4382662 A GB 4382662A GB 964066 A GB964066 A GB 964066A
Authority
GB
United Kingdom
Prior art keywords
coils
pole
lens
nov
slots
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
GB43826/62A
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.)
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
Original Assignee
Brown Boveri und Cie AG Switzerland
BBC Brown Boveri France SA
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 Brown Boveri und Cie AG Switzerland, BBC Brown Boveri France SA filed Critical Brown Boveri und Cie AG Switzerland
Publication of GB964066A publication Critical patent/GB964066A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/14—Arrangements for focusing or reflecting ray or beam
    • H01J3/20—Magnetic lenses
    • H01J3/22—Magnetic lenses using electromagnetic means only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/64—Magnetic lenses
    • H01J29/66—Magnetic lenses using electromagnetic means only

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electron Beam Exposure (AREA)
  • Particle Accelerators (AREA)

Abstract

964,066. Charged-particle beam focusing apparatus. BROWN, BOVERI & CO. Ltd. Nov. 20, 1962 [Nov. 25, 1961], No. 43826/62. Heading H1D. A multi-pole magnetic lens, with hyperbolic field lines between adjacent opposing magnetic poles, for focusing beams of charged particles, comprises a slotted annular core 5, and a winding distributed among the slots and consisting of coils concentric with each polar axis. As shown, a four-pole lens includes a core formed by a stack of internally-slotted laminations, and four sets of coils. The coils a i to f i (i equals 1, 2, 3 or 4) of each set are connected in series or in parallel and form the winding of one pole. The number of conductors in the coils a i to f i may be 99, 92, 79, 61, 38, 13, respectively. Any slight departure from the required hyperbolic field may be corrected by connecting resistances across the individual coils or across groups of coils. The magnetic field may be rotated along the axis of the lens by arranging the slots in oblique or helical fashion.
GB43826/62A 1961-11-25 1962-11-30 Improvements in or relating to magnetic lens systems Expired GB964066A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB64927A DE1212234B (en) 1961-11-25 1961-11-25 Multipole electromagnetic lens, especially quadrupole lens

Publications (1)

Publication Number Publication Date
GB964066A true GB964066A (en) 1964-07-15

Family

ID=6974572

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43826/62A Expired GB964066A (en) 1961-11-25 1962-11-30 Improvements in or relating to magnetic lens systems

Country Status (5)

Country Link
CH (1) CH403102A (en)
DE (1) DE1212234B (en)
FR (1) FR1339925A (en)
GB (1) GB964066A (en)
NL (1) NL285903A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2241821A (en) * 1990-01-09 1991-09-11 Perkin Elmer Corp Quadrupole mass filter for charged particles.
US5489824A (en) * 1990-07-19 1996-02-06 Rca Thomson Licensing Corporation Deflection system with a controlled beam spot
USRE35548E (en) * 1989-10-02 1997-07-01 U.S. Philips Corporation Color display tube system with reduced spot growth

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3321117A1 (en) * 1983-06-10 1984-12-13 Siemens AG, 1000 Berlin und 8000 München MAGNETIC MULTIPOLE N-TERM ORDER
DE3938628C2 (en) * 1988-11-24 1999-02-18 Mitsubishi Electric Corp Device for storing charged particles
DE4422440A1 (en) * 1994-06-29 1996-01-04 Osaulenko Nikolaj Fedorowitsc Electron beam recording device for HF signals

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE35548E (en) * 1989-10-02 1997-07-01 U.S. Philips Corporation Color display tube system with reduced spot growth
GB2241821A (en) * 1990-01-09 1991-09-11 Perkin Elmer Corp Quadrupole mass filter for charged particles.
GB2241821B (en) * 1990-01-09 1994-03-23 Perkin Elmer Corp Quadrupole mass filter for charged particles
US5489824A (en) * 1990-07-19 1996-02-06 Rca Thomson Licensing Corporation Deflection system with a controlled beam spot

Also Published As

Publication number Publication date
FR1339925A (en) 1963-10-11
CH403102A (en) 1965-11-30
NL285903A (en)
DE1212234B (en) 1966-03-10

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