JPH046799A - Adjustment of electromagnet for charged particle accelerator - Google Patents
Adjustment of electromagnet for charged particle acceleratorInfo
- Publication number
- JPH046799A JPH046799A JP10657490A JP10657490A JPH046799A JP H046799 A JPH046799 A JP H046799A JP 10657490 A JP10657490 A JP 10657490A JP 10657490 A JP10657490 A JP 10657490A JP H046799 A JPH046799 A JP H046799A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic field
- putty
- electromagnet
- charged particle
- 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.)
- Pending
Links
- 239000002245 particle Substances 0.000 title claims abstract description 9
- 239000000696 magnetic material Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 239000003292 glue Substances 0.000 abstract description 2
- 238000010422 painting Methods 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 11
- 238000010894 electron beam technology Methods 0.000 description 9
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Particle Accelerators (AREA)
- Electromagnets (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、荷電粒子加速装置用電磁石の調整方法に関
し、さらに詳しくいうと、高い磁界均一度を得るための
電磁石の調整方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for adjusting an electromagnet for a charged particle accelerator, and more specifically, to a method for adjusting an electromagnet to obtain high magnetic field uniformity. .
第２図は、例えば、ニス・オー・アール−リング レポ
ート（ＳＯＲ−ＲＩＮＧ ＲＥＰＯＲＴ） Ｎｏ、５
（昭５３・３月）（昭和４９年度文部省科学研究費総
合研究Ａ −８３４０２１）に示された偏向電磁石の側
面図である。ＳＯＲリングは電子ビームを円周状に周回
させ蓄積する装置である。ＳＯＲリンクには第２図に示
した偏向電磁石か６個用いられている。この偏向電磁石
は電子ビームを６０度偏向する。図で、鉄ヨーク（１）
にコイル（２）か巻回されており、鉄ヨーク（１）で形
成する磁極間に電子ヒームか通過する真空ダクト（３）
が配設されている。電子ビームが通る軌道（４）は真空
ダクト（３）の中心部を通っている。偏向電磁石は２！
ｆ１磁場（図の上から下方向への磁場）を発生する。真
空タクト〈３）の中を運動する電子ビームにはこの２極
磁場が加えられ、電子ビームは磁場によってローレンツ
力を受けて６０度偏向される。電子ビームは６個の電磁
石によって併せて３６０度偏向され、これを繰り返して
リング中を周回する。Figure 2 shows, for example, SOR-RING REPORT No. 5.
(March 1972) (March 1972) (Ministry of Education, Culture, Sports, Science and Technology Grant-in-Aid for Scientific Research Comprehensive Research A-834021). The SOR ring is a device that circulates and accumulates electron beams in a circumferential manner. The SOR link uses six bending electromagnets as shown in FIG. This deflection magnet deflects the electron beam by 60 degrees. In the figure, iron yoke (1)
A vacuum duct (3) where the electron beam passes between the magnetic poles formed by the iron yoke (1).
is installed. The trajectory (4) of the electron beam passes through the center of the vacuum duct (3). There are 2 bending magnets!
Generates f1 magnetic field (magnetic field from top to bottom in the figure). This dipole magnetic field is applied to the electron beam moving in the vacuum tact (3), and the electron beam is deflected by 60 degrees due to the Lorentz force caused by the magnetic field. The electron beam is deflected a total of 360 degrees by six electromagnets, and repeats this process to travel around the ring.
この偏向電磁石によって作られる磁界分布にはｌＸｌ０
−５程度の高い磁界均一度が要求されている。このため
に偏向電磁石には高い製作精度か要求される。もし、十
分均一な磁界分布が得られないと、電子ビームは予定し
た軌道（４）を描かず真空ダクト（３）に衝突して消滅
する。実際の偏向電磁石では製作誤差のために２ａ成分
以外の多極成分をなくすことが難しく、偏向電磁石本体
を削ったり、補正片を加えたりして調整している。ある
いは偏向電磁石に補正電磁石を付加してうまく電子ビー
ムを周回させる手段もとられている。The magnetic field distribution created by this bending electromagnet has lXl0
A high magnetic field uniformity of about -5 is required. For this reason, bending electromagnets require high manufacturing precision. If a sufficiently uniform magnetic field distribution is not obtained, the electron beam will not follow the planned trajectory (4) and will collide with the vacuum duct (3) and disappear. In actual bending electromagnets, it is difficult to eliminate multipolar components other than the 2a component due to manufacturing errors, and adjustments are made by cutting the bending electromagnet body or adding correction pieces. Alternatively, a correction electromagnet has been added to the deflection electromagnet to effectively circulate the electron beam.
従来の荷電粒子加速装置用の偏向電磁石は、多極成分を
打ち消し、高い磁界均一度を得るために細工することは
難しく、時間が掛かるという問題点があった。Conventional bending electromagnets for charged particle accelerators have the problem that it is difficult and time-consuming to modify them in order to cancel multipolar components and obtain high magnetic field uniformity.
この発明は上記の問題点を解決するためになされたもの
で、電磁石の高い磁界均一度を容易に達成できる荷電粒
子加速装置用電磁石の調整方法を得ることを目的とする
。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method for adjusting an electromagnet for a charged particle accelerator, which can easily achieve high magnetic field uniformity of the electromagnet.
この発明に係る荷電粒子加速装置用電磁石の調整方法は
、パテ状の磁性体を電磁石の磁極面に塗って高い磁界均
一度を得るものである。The method for adjusting an electromagnet for a charged particle accelerator according to the present invention is to apply a putty-like magnetic material to the magnetic pole surface of the electromagnet to obtain high magnetic field uniformity.
この発明においては、磁極に塗着された磁性体によって
磁界分布が調整される。In this invention, the magnetic field distribution is adjusted by the magnetic material coated on the magnetic poles.
以下、この発明の一実施例について第１図を参照して説
明する。まず、磁性体を粉状にし、これをのりと混ぜて
パテ状にする。このパテ状の磁性体（５）を鉄ヨーク（
１）の磁極（１ａ）面に適宜に塗布する。磁性体はパテ
状であるので簡単に磁極（１ａ）に塗って磁界均一度を
調整することかでき、簡単に磁界均一度の高い偏向電磁
石を得ることができる。An embodiment of the present invention will be described below with reference to FIG. First, the magnetic material is powdered and mixed with glue to form a putty. This putty-like magnetic material (5) is attached to the iron yoke (
Appropriately coat the magnetic pole (1a) surface of 1). Since the magnetic material is putty-like, it can be easily applied to the magnetic pole (1a) to adjust the magnetic field uniformity, and a bending electromagnet with high magnetic field uniformity can be easily obtained.
なお、上記実施例では偏向電磁石を用いて説明したが、
偏向電磁石以外の収束、発散電磁石などでもよい。In addition, although the above embodiment was explained using a bending electromagnet,
Convergence and divergence electromagnets other than bending electromagnets may also be used.
以上のように、この発明によれば、パテ状の磁性体を磁
極面に塗着するという簡単な手段で、高い磁界均一度を
得ることがてきる。As described above, according to the present invention, high magnetic field uniformity can be obtained by simply applying a putty-like magnetic material to the magnetic pole surface.
第１図はこの発明の一実施例を説明するための偏向電磁
石の要部側断面図、第２図は従来の荷電粒子加速装置用
電磁石の側断面図である。
（１）・ 鉄ヨーク、（１ａ）・ 磁極、（２）・・コ
イル、（３）・・真空ダクト、（５） パテ状の磁
性体。
なお、各図中、同一符号は同−又は相当部分を示す。
貼１図FIG. 1 is a sectional side view of a main part of a bending electromagnet for explaining an embodiment of the present invention, and FIG. 2 is a side sectional view of a conventional electromagnet for a charged particle accelerator. (1) Iron yoke, (1a) Magnetic pole, (2) Coil, (3) Vacuum duct, (5) Putty-like magnetic material. In each figure, the same reference numerals indicate the same or corresponding parts. Figure 1
Claims (1)
磁極に、パテ状の磁性体を塗着して磁界均一度を調整す
る荷電粒子加速装置用電磁石の調整方法。A method for adjusting electromagnets for charged particle accelerators, in which the uniformity of the magnetic field is adjusted by applying putty-like magnetic material to magnetic poles facing each other across a vacuum duct in which charged particles circulate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10657490A JPH046799A (en) | 1990-04-24 | 1990-04-24 | Adjustment of electromagnet for charged particle accelerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10657490A JPH046799A (en) | 1990-04-24 | 1990-04-24 | Adjustment of electromagnet for charged particle accelerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH046799A true JPH046799A (en) | 1992-01-10 |
Family
ID=14437010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10657490A Pending JPH046799A (en) | 1990-04-24 | 1990-04-24 | Adjustment of electromagnet for charged particle accelerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH046799A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI565370B (en) * | 2015-09-11 | 2017-01-01 | 三菱電機股份有限公司 | Electromagnet rack, electromagnet device and particle beam treatment device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59208812A (en) * | 1983-05-13 | 1984-11-27 | Mitsubishi Electric Corp | Highly uniform magnetic field generator |
-
1990
- 1990-04-24 JP JP10657490A patent/JPH046799A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59208812A (en) * | 1983-05-13 | 1984-11-27 | Mitsubishi Electric Corp | Highly uniform magnetic field generator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI565370B (en) * | 2015-09-11 | 2017-01-01 | 三菱電機股份有限公司 | Electromagnet rack, electromagnet device and particle beam treatment device |
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