JPS5583210A - Magnetic unit pole piece - Google Patents

Magnetic unit pole piece

Info

Publication number
JPS5583210A
JPS5583210A JP15885978A JP15885978A JPS5583210A JP S5583210 A JPS5583210 A JP S5583210A JP 15885978 A JP15885978 A JP 15885978A JP 15885978 A JP15885978 A JP 15885978A JP S5583210 A JPS5583210 A JP S5583210A
Authority
JP
Japan
Prior art keywords
plane
angle
pole piece
magnetic field
faces
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.)
Granted
Application number
JP15885978A
Other languages
Japanese (ja)
Other versions
JPS5949681B2 (en
Inventor
Katsushige Tsuno
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.)
Jeol Ltd
Original Assignee
Jeol Ltd
Nihon Denshi KK
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 Jeol Ltd, Nihon Denshi KK filed Critical Jeol Ltd
Priority to JP53158859A priority Critical patent/JPS5949681B2/en
Publication of JPS5583210A publication Critical patent/JPS5583210A/en
Publication of JPS5949681B2 publication Critical patent/JPS5949681B2/en
Expired legal-status Critical Current

Links

Landscapes

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Abstract

PURPOSE: To greatly enhance magnetic field uniformity in pole pieces having a logarithmically curved surface by using a special angle θf between its plane and the point of contact.
CONSTITUTION: A pole piece 1 is on core 3 spaced by pure iron spacer 2. The leading edge plane 1a with diameter df faces the opposing pole piece. Outer periphery near the plane 1a is machined in the logarithmically curved surface 1b which is specially calculated, and the angle θf formed by two faces is set to about 2.5W4°. In machining, when the angle θf has reached a specified value, the curved face 1b is cut into either plane face, or conical plane 1c having an angle θf. This structure allows magnetic field distribution to have small and stabilized 2nd and 4th coefficients and each aberration to have minimum dependency on Z. The obtained magnetic field is easy to correct by a device such as a shim coil, thus resulting in an equipment with a highly uniform megnetic field.
COPYRIGHT: (C)1980,JPO&Japio
JP53158859A 1978-12-19 1978-12-19 Pole piece for magnet device Expired JPS5949681B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53158859A JPS5949681B2 (en) 1978-12-19 1978-12-19 Pole piece for magnet device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53158859A JPS5949681B2 (en) 1978-12-19 1978-12-19 Pole piece for magnet device

Publications (2)

Publication Number Publication Date
JPS5583210A true JPS5583210A (en) 1980-06-23
JPS5949681B2 JPS5949681B2 (en) 1984-12-04

Family

ID=15680953

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53158859A Expired JPS5949681B2 (en) 1978-12-19 1978-12-19 Pole piece for magnet device

Country Status (1)

Country Link
JP (1) JPS5949681B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5315279A (en) * 1990-02-27 1994-05-24 Tdk Corporation Coil device
US6211765B1 (en) 1990-02-27 2001-04-03 Tdk Corporation Coil device
KR100423775B1 (en) * 2002-02-27 2004-03-30 (주)에스시엠아이 Magnetic pole of electro magnet for forming equalized magnetic field

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5315279A (en) * 1990-02-27 1994-05-24 Tdk Corporation Coil device
US6211765B1 (en) 1990-02-27 2001-04-03 Tdk Corporation Coil device
KR100423775B1 (en) * 2002-02-27 2004-03-30 (주)에스시엠아이 Magnetic pole of electro magnet for forming equalized magnetic field

Also Published As

Publication number Publication date
JPS5949681B2 (en) 1984-12-04

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