EP0208163B1 - Dispositif à champ magnétique pour un appareil d'accélération et/ou de stockage de particules chargées - Google Patents

Dispositif à champ magnétique pour un appareil d'accélération et/ou de stockage de particules chargées Download PDF

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Publication number
EP0208163B1
EP0208163B1 EP86108071A EP86108071A EP0208163B1 EP 0208163 B1 EP0208163 B1 EP 0208163B1 EP 86108071 A EP86108071 A EP 86108071A EP 86108071 A EP86108071 A EP 86108071A EP 0208163 B1 EP0208163 B1 EP 0208163B1
Authority
EP
European Patent Office
Prior art keywords
dipole
windings
magnetic field
arrangement according
auxiliary winding
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
EP86108071A
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German (de)
English (en)
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EP0208163A1 (fr
Inventor
Andreas Dr. Jahnke
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Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0208163A1 publication Critical patent/EP0208163A1/fr
Application granted granted Critical
Publication of EP0208163B1 publication Critical patent/EP0208163B1/fr
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
    • H05H7/04—Magnet systems, e.g. undulators, wigglers; Energisation thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/879—Magnet or electromagnet

Definitions

  • the invention relates to a magnetic field device for a system for accelerating and / or storing electrically charged particles, in particular electrons, whose particle path has curved sections, in each of which a correspondingly curved dipole magnet is arranged, which contains superconducting windings and an additional winding and with which a magnetic guiding field is to be generated for the particle beam, which is weakly focused due to corresponding field gradients.
  • a magnetic field device for a system for accelerating and / or storing electrically charged particles, in particular electrons, whose particle path has curved sections, in each of which a correspondingly curved dipole magnet is arranged, which contains superconducting windings and an additional winding and with which a magnetic guiding field is to be generated for the particle beam, which is weakly focused due to corresponding field gradients.
  • microtrons can achieve particle energies of up to approximately 100 MeV. These systems can in particular also be implemented as so-called race track microtrons (English: “race track”).
  • race track microtrons English: “race track”
  • the particle trajectories of this type of accelerator systems are composed of two semicircles, each with a corresponding 180 ° deflection magnet, and of two straight trajectory sections (cf. "Nucl. Instr. And Meth.”, Vol. 177, 1980, pages 411 to 416, or Vol. 204, 1982, pages 1 to 20).
  • the magnetic field can be increased with unchanged dimensions.
  • Such magnetic fields can be generated in particular with superconducting magnets.
  • the electron storage ring system which can be gathered from the publication mentioned at the outset also has dipole magnets with superconducting windings in its curved sections. It is generally assumed that the guide field generated in the area of these magnets has a weakly focusing effect for the particle beam due to corresponding field gradients.
  • a measure of such a focus is the so-called field index n, which is generally defined as: where ro is the radius of the particle orbit, B z o is the component of magnetic induction running perpendicular to the particle orbit and aB / ar is the field gradient (see, for example, R. Kollath: "Particle Accelerator", Braunschweig 1955, page 23).
  • the field index is between approximately 0.3 and 0.7 and in particular approximately 0.5.
  • Such weak focusing in the curved path sections is generally achieved in known storage ring systems by special shaping of the pole shoes of an iron yoke of the dipole magnet enclosing the particle path and, if appropriate, by special additional windings.
  • the superconducting dipole magnets also have iron yokes in the storage ring system which can be gathered from the publication mentioned at the beginning. These yokes are broken through to the outside in the equatorial plane of the particle path in order to allow an outlet and thus a use of the synchrotron radiation occurring in the curved sections of the particle path.
  • the object of the present invention is therefore to improve the known magnetic field device in such a way that the field gradients required for weak focusing of the particle beam are to be formed in a relatively simple manner in the area of their curved dipole coils and the equipment expenditure required for this is limited without any restriction of the Magnitude of magnetic induction due to the saturation magnetization of iron.
  • each at least largely iron-free dipole magnet is assigned a superconducting additional winding, which is curved accordingly, which at least adjoins the area of the concave inner sides of the curved dipole windings with its convex outside and with which the required field gradients are essentially to be produced .
  • the additional winding of each dipole magnet thus has a curved shape that corresponds to that of the dipole windings.
  • the advantages associated with this can be seen in particular in the fact that the same manufacturing processes can be used for the additional winding as for the superconducting dipole windings.
  • Appropriate methods are e.g. proposed with DE patent applications P 3 444 983.3, P 3 504 211.7 or P 3 504 223.0.
  • the volume filled by a curved additional winding is relatively small, so that the energy to be stored in it is advantageously correspondingly low.
  • FIG. 1 shows a magnetic field device according to the invention as part of an electron accelerator or electrical device storage ring system is indicated.
  • Figure 2 shows schematically the superconducting windings of such a magnetic field device. Corresponding parts in the figures are provided with the same reference numerals.
  • FIG. 1 an oblique view of a curved dipole deflection magnet of an electron accelerator or storage ring system is shown schematically in a partially broken illustration.
  • the dipole magnet generally designated 2
  • the dipole magnet is also curved due to the curved particle path s and can in particular be curved in a semicircular shape (cf. e.g. the publication mentioned at the beginning). Since in particular end energies of the electrons e of several 100 MeV are aimed for, the windings 3 and 4 of the magnet are made with superconducting material because of the high field strengths required for this.
  • dipole windings 3 and 4 which are also referred to as main windings, are arranged on both sides of an electron beam tube 5 running along the particle path s and lie in parallel planes and, due to their curvature, each have a concave inner side 3i or 4i and a convex outer side 3a or 4a .
  • the additional winding 7, which is therefore also to be referred to as gradient winding, has a curved shape corresponding to the shape of the main windings 3 and 4.
  • the concave inner sides 3i and 4i of the dipole windings 3 and 4 and the convex outer side 7a of the additional winding 7 can also advantageously overlap in this region, ie these windings then have one in this region about the same radius of curvature r.
  • a correspondingly curved superconducting secondary winding 8 or 9 can be provided in each of the surfaces enclosed by the superconducting main windings 3 and 4. Since the conductors of the windings 3, 4, 7 to 9 consist of superconducting material, a common croystate or helium housing 11 is provided for these windings. The housing 11 and thus the windings located in it can be fastened to a tower-like holder 12 or other supporting device which, due to the curved shape of the additional winding 7, advantageously lies approximately at the center of the radii of curvature of the windings and thus outside of the windings 3, 4, 7 each enclosed area can be arranged.
  • a slot-like blasting chamber 13 is hereby formed, which extends between the convex outer sides 3a and 4a of the main windings up to the outer side 7a of the superconducting additional winding 7.
  • the synchronous tron radiation emerging tangentially from this blasting chamber is indicated in the figure by dashed lines 14.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Particle Accelerators (AREA)

Claims (8)

1. Dispositif à champ magnétique pour une installation d'accélération et/ou de stockage de particules chargées électriquement, notamment d'électrons, dont l'orbite des particules (5) comporte des parties incurvées dans chacune desquelles est monté un aimant dipolaire (2) incurvé, qui comporte des enroulements supraconducteurs (3, 4) et un enroulement supplémentaire (7) et par lequel on peut produire un champ magnétique de guidage du faisceau de particules, qui est légèrement focalisé par des gradients de champ adéquats, caractérisé en ce qu'à chaque aimant dipolaire (2) au moins dans une grande mesure exempt de fer, est associé un enroulement supplémentaire (7) supraconducteur, qui est incurvé de manière correspondante à la courbure des enroulements dipolaires (3, 4), dont le côté extérieur convexe (7a) est adjacent au moins à la région des côtés intérieurs concaves (3i, 4i) des enroulements dipolaires (3 et 4) incurvés et par lequel on peut créer pour l'essentiel les gradients de champ qui sont nécessaires.
2. Dispositif à champ magnétique suivant la revendication 1, caractérisé en ce que l'enroulement supplémentaire (7) est monté dans un plan intermédiaire s'étendant entre les plans parallèles des enroulements dipolaires (3, 4).
3. Dispositif à champ magnétique suivant la revendication 1 ou 2, caractérisé en ce que les côtés extérieurs convexes (7a) de l'enroulement supplémentaire (7), ainsi que les côtés intérieurs concaves (3i, 4i) des enroulements dipolaires (3, 4) se chevauchent au moins partiellement.
4. Dispositif à champ magnétique suivant l'une des revendications 1 à 3, caractérisé en ce que l'enroulement supplémentaire (7) et les enroulements dipolaires (3, 4) se trouvent dans une enveloppe cryostatique (11) commune.
5. Dispositif à champ magnétique suivant la revendication 4, caractérisé en ce que l'enroulement supplémentaire (7) et les enroulements dipolaires (3, 4) sont fixés à une pièce de fixation (12) centrale en forme de tour, par l'intermédiaire de l'enveloppe cryostatique (11).
6. Dispositif à champ magnétique suivant la revendication 5, caractérisé en ce que la pièce de fixation (12) en forme de tour est disposée du côté intérieur des aimants dipolaires (2) à l'extérieur des surfaces délimitées par les enroulements (3, 4, 7).
7. Dispositif à champ magnétique suivant l'une des revendications 4 à 6, caractérisé en ce que, pour la sortie du faisceau du synchrontron, l'enveloppe cryostatique (11) est constituée, dans la région du plan médian défini par l'orbite ou par les orbites des particules, sur son côté extérieur, en une chambre de sortie du faisceau (13) de type à fente.
8. Dispositif à champ magnétique suivant l'une des revendications 1 à 7, caractérisé en ce que dans les surfaces entourées par les enroulements dipolaires (3, 4), sont montés respectivement des enroulements auxiliaires dipolaires (8 et 9) à conducteurs supraconducteurs.
EP86108071A 1985-06-24 1986-06-12 Dispositif à champ magnétique pour un appareil d'accélération et/ou de stockage de particules chargées Expired EP0208163B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3522528 1985-06-24
DE3522528 1985-06-24

Publications (2)

Publication Number Publication Date
EP0208163A1 EP0208163A1 (fr) 1987-01-14
EP0208163B1 true EP0208163B1 (fr) 1989-01-04

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EP86108071A Expired EP0208163B1 (fr) 1985-06-24 1986-06-12 Dispositif à champ magnétique pour un appareil d'accélération et/ou de stockage de particules chargées

Country Status (4)

Country Link
US (1) US4680565A (fr)
EP (1) EP0208163B1 (fr)
JP (1) JPS61294800A (fr)
DE (1) DE3661672D1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4000666A1 (de) * 1989-01-12 1990-07-19 Mitsubishi Electric Corp Elektromagnet fuer teilchenbeschleuniger
US7728311B2 (en) 2005-11-18 2010-06-01 Still River Systems Incorporated Charged particle radiation therapy
US8003964B2 (en) 2007-10-11 2011-08-23 Still River Systems Incorporated Applying a particle beam to a patient
US8581523B2 (en) 2007-11-30 2013-11-12 Mevion Medical Systems, Inc. Interrupted particle source
US8791656B1 (en) 2013-05-31 2014-07-29 Mevion Medical Systems, Inc. Active return system
US8927950B2 (en) 2012-09-28 2015-01-06 Mevion Medical Systems, Inc. Focusing a particle beam
US8933650B2 (en) 2007-11-30 2015-01-13 Mevion Medical Systems, Inc. Matching a resonant frequency of a resonant cavity to a frequency of an input voltage
US8952634B2 (en) 2004-07-21 2015-02-10 Mevion Medical Systems, Inc. Programmable radio frequency waveform generator for a synchrocyclotron
US9155186B2 (en) 2012-09-28 2015-10-06 Mevion Medical Systems, Inc. Focusing a particle beam using magnetic field flutter
US9185789B2 (en) 2012-09-28 2015-11-10 Mevion Medical Systems, Inc. Magnetic shims to alter magnetic fields
US9301384B2 (en) 2012-09-28 2016-03-29 Mevion Medical Systems, Inc. Adjusting energy of a particle beam
US9545528B2 (en) 2012-09-28 2017-01-17 Mevion Medical Systems, Inc. Controlling particle therapy
US9962560B2 (en) 2013-12-20 2018-05-08 Mevion Medical Systems, Inc. Collimator and energy degrader
US10258810B2 (en) 2013-09-27 2019-04-16 Mevion Medical Systems, Inc. Particle beam scanning

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DE3704442A1 (de) * 1986-02-12 1987-08-13 Mitsubishi Electric Corp Ladungstraegerstrahlvorrichtung
JPH0821478B2 (ja) * 1986-09-02 1996-03-04 三菱電機株式会社 荷電粒子装置
EP0277521B1 (fr) * 1987-01-28 1991-11-06 Siemens Aktiengesellschaft Source de radiation synchrotron avec fixation de ses bobines courbées
DE3705294A1 (de) * 1987-02-19 1988-09-01 Kernforschungsz Karlsruhe Magnetisches ablenksystem fuer geladene teilchen
GB2223350B (en) * 1988-08-26 1992-12-23 Mitsubishi Electric Corp Device for accelerating and storing charged particles
US4939493A (en) * 1988-09-27 1990-07-03 Boston University Magnetic field generator
DE4029477C2 (de) * 1989-09-29 1994-06-01 Siemens Ag Tesserale Gradientenspule für Kernspin-Tomographiegeräte
JPH03220500A (ja) * 1990-01-24 1991-09-27 Mitsubishi Electric Corp 荷電粒子偏向電磁石用コイル
JP2896188B2 (ja) * 1990-03-27 1999-05-31 三菱電機株式会社 荷電粒子装置用偏向電磁石
GB2272994B (en) * 1990-03-27 1994-08-31 Mitsubishi Electric Corp Deflection electromagnet for a charged particle device
EP0542737A1 (fr) * 1990-08-06 1993-05-26 Siemens Aktiengesellschaft Source de rayonnement synchrotron
EP0605480A1 (fr) * 1991-09-25 1994-07-13 Siemens Aktiengesellschaft Ensemble bobine avec extremites torsadees, constitue d'un conducteur en fils supraconducteurs
US5221554A (en) * 1991-12-24 1993-06-22 Aly Gamay Process for producing low-fat meat products
JP2944317B2 (ja) * 1992-07-28 1999-09-06 三菱電機株式会社 シンクロトロン放射光源装置
EP1764132A1 (fr) * 2005-09-16 2007-03-21 Siemens Aktiengesellschaft Procédé et dispositif pour la configuration d'une trajectoire de faisceau d'un système de thérapie par faisceau de particules
DE102006018635B4 (de) * 2006-04-21 2008-01-24 Siemens Ag Bestrahlungsanlage mit einem Gantry-System mit einem gekrümmten Strahlführungsmagneten
DE102006035101A1 (de) * 2006-07-28 2008-02-07 Siemens Ag Strahlführungsmagnet zur Ablenkung geladener Teilchen längs einer gekrümmten Bahn mit zugeordneter Kühlvorrichtung und Bestrahlungsanlage mit einem solchen Magneten
DE102007021033B3 (de) * 2007-05-04 2009-03-05 Siemens Ag Strahlführungsmagnet zur Ablenkung eines Strahls elektrisch geladener Teilchen längs einer gekrümmten Teilchenbahn und Bestrahlungsanlage mit einem solchen Magneten
JP6121546B2 (ja) 2012-09-28 2017-04-26 メビオン・メディカル・システムズ・インコーポレーテッド 粒子加速器用の制御システム
US9723705B2 (en) 2012-09-28 2017-08-01 Mevion Medical Systems, Inc. Controlling intensity of a particle beam
US9622335B2 (en) 2012-09-28 2017-04-11 Mevion Medical Systems, Inc. Magnetic field regenerator
US10254739B2 (en) 2012-09-28 2019-04-09 Mevion Medical Systems, Inc. Coil positioning system
US9730308B2 (en) 2013-06-12 2017-08-08 Mevion Medical Systems, Inc. Particle accelerator that produces charged particles having variable energies
JP6255549B2 (ja) * 2013-10-16 2018-01-10 学校法人早稲田大学 空芯型サイクロトロン
US10675487B2 (en) 2013-12-20 2020-06-09 Mevion Medical Systems, Inc. Energy degrader enabling high-speed energy switching
US9661736B2 (en) 2014-02-20 2017-05-23 Mevion Medical Systems, Inc. Scanning system for a particle therapy system
US9950194B2 (en) 2014-09-09 2018-04-24 Mevion Medical Systems, Inc. Patient positioning system
US10786689B2 (en) 2015-11-10 2020-09-29 Mevion Medical Systems, Inc. Adaptive aperture
US10925147B2 (en) 2016-07-08 2021-02-16 Mevion Medical Systems, Inc. Treatment planning
US11103730B2 (en) 2017-02-23 2021-08-31 Mevion Medical Systems, Inc. Automated treatment in particle therapy
US10984935B2 (en) * 2017-05-02 2021-04-20 Hefei Institutes Of Physical Science, Chinese Academy Of Sciences Superconducting dipole magnet structure for particle deflection
EP3645111A1 (fr) 2017-06-30 2020-05-06 Mevion Medical Systems, Inc. Collimateur configurable commandé au moyen de moteurs linéaires
US11291861B2 (en) 2019-03-08 2022-04-05 Mevion Medical Systems, Inc. Delivery of radiation by column and generating a treatment plan therefor

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US3283276A (en) * 1963-07-25 1966-11-01 Avco Corp Twisted superconductive winding assembly
DE3148100A1 (de) * 1981-12-04 1983-06-09 Uwe Hanno Dr. 8050 Freising Trinks "synchrotron-roentgenstrahlungsquelle"
SE436962B (sv) * 1983-06-17 1985-01-28 Scanditronix Instr Race-track mikrotron for lagring av en energirik elektronstrale
DE3504211A1 (de) * 1985-02-07 1986-08-07 Siemens AG, 1000 Berlin und 8000 München Verfahren zur herstellung einer gekruemmten magnetspule und vorrichtung zur durchfuehrung dieses verfahrens
DE3504223A1 (de) * 1985-02-07 1986-08-07 Siemens AG, 1000 Berlin und 8000 München Verfahren zur herstellung einer scheibenfoermigen, gekruemmten magnetspule und vorrichtung zur durchfuehrung des verfahrens

Cited By (21)

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Publication number Priority date Publication date Assignee Title
DE4000666A1 (de) * 1989-01-12 1990-07-19 Mitsubishi Electric Corp Elektromagnet fuer teilchenbeschleuniger
US8952634B2 (en) 2004-07-21 2015-02-10 Mevion Medical Systems, Inc. Programmable radio frequency waveform generator for a synchrocyclotron
US8907311B2 (en) 2005-11-18 2014-12-09 Mevion Medical Systems, Inc. Charged particle radiation therapy
US8344340B2 (en) 2005-11-18 2013-01-01 Mevion Medical Systems, Inc. Inner gantry
US8916843B2 (en) 2005-11-18 2014-12-23 Mevion Medical Systems, Inc. Inner gantry
US9452301B2 (en) 2005-11-18 2016-09-27 Mevion Medical Systems, Inc. Inner gantry
US7728311B2 (en) 2005-11-18 2010-06-01 Still River Systems Incorporated Charged particle radiation therapy
US8003964B2 (en) 2007-10-11 2011-08-23 Still River Systems Incorporated Applying a particle beam to a patient
US8941083B2 (en) 2007-10-11 2015-01-27 Mevion Medical Systems, Inc. Applying a particle beam to a patient
US8581523B2 (en) 2007-11-30 2013-11-12 Mevion Medical Systems, Inc. Interrupted particle source
USRE48317E1 (en) 2007-11-30 2020-11-17 Mevion Medical Systems, Inc. Interrupted particle source
US8933650B2 (en) 2007-11-30 2015-01-13 Mevion Medical Systems, Inc. Matching a resonant frequency of a resonant cavity to a frequency of an input voltage
US8970137B2 (en) 2007-11-30 2015-03-03 Mevion Medical Systems, Inc. Interrupted particle source
US9301384B2 (en) 2012-09-28 2016-03-29 Mevion Medical Systems, Inc. Adjusting energy of a particle beam
US9185789B2 (en) 2012-09-28 2015-11-10 Mevion Medical Systems, Inc. Magnetic shims to alter magnetic fields
US9155186B2 (en) 2012-09-28 2015-10-06 Mevion Medical Systems, Inc. Focusing a particle beam using magnetic field flutter
US8927950B2 (en) 2012-09-28 2015-01-06 Mevion Medical Systems, Inc. Focusing a particle beam
US9545528B2 (en) 2012-09-28 2017-01-17 Mevion Medical Systems, Inc. Controlling particle therapy
US8791656B1 (en) 2013-05-31 2014-07-29 Mevion Medical Systems, Inc. Active return system
US10258810B2 (en) 2013-09-27 2019-04-16 Mevion Medical Systems, Inc. Particle beam scanning
US9962560B2 (en) 2013-12-20 2018-05-08 Mevion Medical Systems, Inc. Collimator and energy degrader

Also Published As

Publication number Publication date
US4680565A (en) 1987-07-14
JPS61294800A (ja) 1986-12-25
DE3661672D1 (en) 1989-02-09
EP0208163A1 (fr) 1987-01-14

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