EP0195926A2 - Système à aimants supraconducteurs pour accélérateur de particules pour source de radiation synchrotron - Google Patents

Système à aimants supraconducteurs pour accélérateur de particules pour source de radiation synchrotron Download PDF

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Publication number
EP0195926A2
EP0195926A2 EP86102069A EP86102069A EP0195926A2 EP 0195926 A2 EP0195926 A2 EP 0195926A2 EP 86102069 A EP86102069 A EP 86102069A EP 86102069 A EP86102069 A EP 86102069A EP 0195926 A2 EP0195926 A2 EP 0195926A2
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EP
European Patent Office
Prior art keywords
magnet system
winding
superconducting
slot
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.)
Granted
Application number
EP86102069A
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German (de)
English (en)
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EP0195926B1 (fr
EP0195926A3 (en
Inventor
Cord-Henrich Dr. Dipl.-Phys. Dustmann
Hubert Dr.Dipl.-Phys. Keiber
Bernd Dr.Dipl.-Phys. Krevet
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Forschungszentrum Karlsruhe GmbH
Original Assignee
Kernforschungszentrum Karlsruhe GmbH
Brown Boveri und Cie AG Germany
Asea Brown Boveri AG Germany
BBC Brown Boveri AG Germany
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Application filed by Kernforschungszentrum Karlsruhe GmbH, Brown Boveri und Cie AG Germany, Asea Brown Boveri AG Germany, BBC Brown Boveri AG Germany filed Critical Kernforschungszentrum Karlsruhe GmbH
Priority to AT86102069T priority Critical patent/ATE49839T1/de
Publication of EP0195926A2 publication Critical patent/EP0195926A2/fr
Publication of EP0195926A3 publication Critical patent/EP0195926A3/de
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Publication of EP0195926B1 publication Critical patent/EP0195926B1/fr
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils

Definitions

  • the invention relates to a superconducting magnet system for particle accelerators of a synchrotron radiation source with a slot lying approximately in the plane of the particle path, tangentially or radially open for the exit of the synchrotron radiation and with a mechanical support device for the superconducting winding.
  • Such a magnet system is known from DE-OS 31 48 100 or from "Nuclear Instruments and Methods", Vol. 200, 1982, p. 475 to p. 479.
  • the coil configuration used in the known magnet system has a right-angled winding cross section and enables the tangential radiation exit.
  • the energy stored in the magnetic field is higher for such configurations than for a comparable shell arrangement.
  • This high stored energy must be quenched, i.e. in the event of an unwanted transition from the superconducting to the normally conducting phase, be decoupled from the coil in order to prevent destruction of the coil due to the strong heating and the associated mechanical stresses.
  • the coil configuration mentioned requires a comparatively large amount of conductor material in order to implement the required magnetic field.
  • Superconducting deflection magnets are also used in the construction of large ring accelerators (e.g. HERA).
  • HERA large ring accelerators
  • the coil configuration used here has a shell-shaped winding cross section and an essentially cos e-shaped current distribution. The current distribution is designed for generating a dipole field within the winding arrangement.
  • the key element of this configuration is a clip that biases the superconducting coil.
  • the basic idea of the pretensioning principle is to compress the coil package so far by clamp elements in the de-energized state that the superconducting winding is supported with the rigidity of the clamp element when the coil is fully excited. This is necessary to prevent a conductor movement and thus a quench.
  • a bowl-shaped coil configuration with clamp elements does not allow the synchrotron radiation to exit tangentially with respect to the particle path curvature, since the particle path is surrounded on all sides by a vacuum tube and the surrounding coil arrangement with clamp elements.
  • the invention is based on the object of specifying a superconducting magnet system of the type mentioned at the outset, which has a low magnetic energy content, requires little conductor material and, when it is designed, an unfavorable vacuum pressure impregnation with regard to the training behavior can be avoided.
  • the at least one clamp element can form a structural unit with at least one tensioning element, which supports the superconducting winding in the region of the slot.
  • the clamp elements and the clamping elements will be separate, non-positively connected components.
  • the superconducting winding has a shell structure in which the coil is made from several concentric cylindrical shells. Ig winding packages are accommodated between two azimuth angles within each shell.
  • the advantage of this configuration is the low magnetic energy compared to the rectangular winding configuration.
  • the superconducting winding is designed as a block structure.
  • a block structure which is suitable in principle is given in H. Brechna: “Superconducting Magnet Systems” Springer Verlag, Berlin, Heidelberg, New York (1973) page 40, Fig. 2.1.6a.
  • the tensioning element can advantageously be hook-shaped, wherein it supports the superconducting winding in the region of the slot with a first leg and is suspended in the bracket, which essentially comprises the entire winding arrangement, with a second leg.
  • tensioning element can be seen in the fact that its cross section is U-shaped.
  • the inside of the base leg supports the winding parts directed towards the slot, and the two free legs are braced with the clamp and apply the required pressure force.
  • Pull bolts can be attached to the free leg ends for tensioning.
  • U-shaped clamping element with a further leg, which partially supplements the U-profile to form a W-profile, but the third free leg is not, or only partially, realized.
  • the second free base leg engages under the winding part, which lies in the plane of the curved particle path and on the side of the path center of curvature.
  • the tensioning element is designed so that when the magnetic field is switched on it can absorb the attractive forces of the opposing coil halves directed towards the particle path level and at the same time transfers the required pretension to the winding parts in order to exclude conductor movements.
  • the tensioning elements can preferably be designed such that they are part of the helium container in which the superconducting coil is located, in addition to the transmission of the prestress. Material can be saved in this way, in particular in the area of the slot, which simplifies the structural design in the slot area.
  • the clamp elements and / or the clamping elements are preferably made of non-magnetic material, e.g. non-magnetic steel.
  • the magnet system can also be advantageous for the magnet system to design the clamp elements and / or the clamping elements as a magnetic yoke.
  • a laminated design of the clamp elements and / or clamping elements is preferable.
  • the clamp elements and the clamping elements can be designed as a solid yoke.
  • a structural unit of clamping elements and cryogenic container is particularly advantageous here.
  • the slot width and the arrangement of the windings are preferably matched to one another in such a way that, in addition to the dipole field, a quadrupole field, which has a focusing influence on the particle beam, is generated in the particle channel.
  • the slot can be enlarged by an optimization in this regard, so that more space is available for the clamping elements.
  • the superconducting winding is designed as a helium-transparent winding, i.e. that the insulation is designed in such a way that helium can penetrate into the winding between the conductors and cause intensive conductor cooling.
  • the superconducting winding 12 is made from several concentric cylindrical shells 13. Within each shell 13 there are accommodated winding packages between two azimuth angles e. There is non-magnetic filling material 14 between the winding packages, which consist of individual conductors running perpendicular to the plane of the representation.
  • This winding configuration results in an essentially cos ⁇ -shaped current distribution and is suitable for generating a dipole field. It has the advantage of lower magnetic energy compared to a rectangular winding configuration.
  • Electrons that move along the particle channel 11, which runs perpendicular to the plane of the illustration, are deflected as a result of the Lorentz force and forced onto a circular path 19. They emit synchrotron radiation tangentially to the outside (to the left in FIG. 1). The synchrotron radiation can emerge laterally from the particle channel 11 through a slot 15 and stands for physical experiments or technical ones. Applications available.
  • the clamp elements 16 consist of punched magnetic sheets which are stacked to form a magnetic yoke.
  • the magnetic yoke has a circular shape composed of two halves curved cylinder, which forms a 90 0 arc.
  • sheets of different dimensions are required, between which there are spaces 17 which are filled with the cooling medium helium.
  • wedge-shaped stamped sheets can also be used, but these are considerably more expensive to produce than sheets made of the same material, as shown.
  • the sheets are welded together to form a unit.
  • the two yoke halves are connected to one another by tie rods 18. Due to the tension force of the tie rods 18, which can be applied with the aid of hydraulic pressing devices, the pressure required to pretension the superconducting winding 12 is generated.
  • the superconducting winding 12 is supported by tensioning elements 20.
  • the tensioning elements 20 are also laminated and complement the yoke effect of the clamp elements 16.
  • the tensioning elements 20 are essentially U-shaped.
  • One free leg 21 engages under the free part 22 of the winding 12 facing the slot 15 with a shell-shaped winding cross section 13.
  • the other free leg 23 engages behind a step-shaped recess 24 in the clamp element 16.
  • the tensioning elements 30 are prestressed. In doing so, they fulfill their task of transferring the forces of the coil to the yoke.
  • the superconducting winding 12, the clamp elements 16 and the tensioning elements 20 are surrounded by a container wall 25, within which there is liquid helium det.
  • the particle channel 11, the slot 15 and the area outside the container wall 25 are evacuated.
  • the external cold shields and the outer vacuum jacket were not shown in FIG. 1.
  • the legs 21 of the clamping elements 20 facing the slot 15 are welded to the container wall 25. They thus serve to stiffen the container wall 25 in the area of the slot 15.
  • An insulation layer 26 is arranged between the winding 12 and the clamp elements 16, the thickness of which is selected on the basis of magnetic field calculations so that the field homogeneity in the particle channel 11 is not impaired by saturation phenomena in the material of the clamp elements 16 or the clamping elements 20.
  • the insulation layer 26 is a non-magnetic intermediate material, for example made of filled plastic.
  • FIG. 3 shows a further embodiment of the invention, the same or corresponding parts being given the same reference numbers as those from FIGS. 1 and 2.
  • the superconducting winding 12 is comparable to that shown in FIG. 1. It encloses a particle channel 11.
  • the individual winding packets 12 are separated from one another by non-magnetic filler pieces 14.
  • the winding 12 is surrounded by an insulation layer 26, the design of which is subject to the same requirements as were explained in the description of FIGS. 1 and 2.
  • the winding with the shell structure 13 is surrounded by a two-part clamp element 30 made of non-magnetic material, the two parts of which are closed by tension ker 31 are interconnected.
  • the outer shape of the clamp element 30 essentially resembles a circular ring section with a rectangular cross section. This can be, for example, a 1/4 circle, as shown in FIG. 2, or a semicircle of the ring.
  • tensioning elements 33 made of non-magnetic material with an essentially W-shaped cross section, arranged symmetrically to the slot 32.
  • the clamping elements 33 are turned parts, the axis of rotation of which coincides with the center of curvature of the particle track 19.
  • Draw studs 37 are welded to the outer free leg 34 and the middle free leg 35 of the W profile, by means of which the tensioning element 33 is connected and clamped to the clamp element 30.
  • the base leg 36 lying between the free legs 34 and 35 is pressed against the winding parts 38 directed towards the slot 32, so that the required pretension is transferred to the superconducting winding 12.
  • the cross section of the tensioning element 33 has a further free leg 39, by means of which the tensioning element cross section is approximately supplemented to a W-shape, the third free leg 39, which is located with respect to the particle path 19, not being formed symmetrically to the outer free leg 34 is, but engages under the part 40 of the winding 12 pointing towards the center of curvature of the particle path 19.
  • the magnet system is surrounded by a container wall 41, in the interior of which the cooling medium is turned on is closed.
  • the container wall 41 is welded to the clamping elements 33, so that the clamping elements also serve as part of the cryogenic jacket here. 3, external cold shields and the vacuum jacket are also not shown.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Particle Accelerators (AREA)
EP86102069A 1985-03-28 1986-02-18 Système à aimants supraconducteurs pour accélérateur de particules pour source de radiation synchrotron Expired - Lifetime EP0195926B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86102069T ATE49839T1 (de) 1985-03-28 1986-02-18 Supraleitendes magnetsystem fuer teilchenbeschleuniger einer synchrotonstrahlungsquelle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3511282A DE3511282C1 (de) 1985-03-28 1985-03-28 Supraleitendes Magnetsystem fuer Teilchenbeschleuniger einer Synchrotron-Strahlungsquelle
DE3511282 1985-03-28

Publications (3)

Publication Number Publication Date
EP0195926A2 true EP0195926A2 (fr) 1986-10-01
EP0195926A3 EP0195926A3 (en) 1987-12-16
EP0195926B1 EP0195926B1 (fr) 1990-01-24

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ID=6266590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102069A Expired - Lifetime EP0195926B1 (fr) 1985-03-28 1986-02-18 Système à aimants supraconducteurs pour accélérateur de particules pour source de radiation synchrotron

Country Status (5)

Country Link
US (1) US4745367A (fr)
EP (1) EP0195926B1 (fr)
JP (1) JPS61227400A (fr)
AT (1) ATE49839T1 (fr)
DE (2) DE3511282C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0276360A2 (fr) * 1987-01-28 1988-08-03 Siemens Aktiengesellschaft Dispositif magnétique à bobines courbées
EP0277521A2 (fr) * 1987-01-28 1988-08-10 Siemens Aktiengesellschaft Source de radiation synchrotron avec fixation de ses bobines courbées

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DE3704442A1 (de) * 1986-02-12 1987-08-13 Mitsubishi Electric Corp Ladungstraegerstrahlvorrichtung
DE3842792A1 (de) * 1988-12-20 1990-06-28 Kernforschungsz Karlsruhe Teilchenfuehrungsmagnet zur fuehrung elektrisch geladener teilchen
JPH0782933B2 (ja) * 1989-01-19 1995-09-06 新技術事業団 超電導マグネット
WO1993002537A1 (fr) * 1991-07-16 1993-02-04 Sergei Nikolaevich Lapitsky Electro-aimant supraconducteur pour accellerateur de particules porteuses de charge
US5374913A (en) * 1991-12-13 1994-12-20 Houston Advanced Research Center Twin-bore flux pipe dipole magnet
US5463291A (en) * 1993-12-23 1995-10-31 Carroll; Lewis Cyclotron and associated magnet coil and coil fabricating process
US6664666B2 (en) * 1998-12-23 2003-12-16 Engineering Matters, Inc. Motor assembly allowing output in multiple degrees of freedom
ES2558978T3 (es) * 2004-07-21 2016-02-09 Mevion Medical Systems, Inc. Generador de formas de ondas de radiofrecuencia programable para un sincrociclotrón
EP2389978B1 (fr) * 2005-11-18 2019-03-13 Mevion Medical Systems, Inc. Radiothérapie à particules chargées
JP5481070B2 (ja) * 2006-01-19 2014-04-23 マサチューセッツ インスティテュート オブ テクノロジー 粒子加速のための磁場生成方法、磁石構造体及びその製造方法
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
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
JP5524494B2 (ja) * 2009-03-09 2014-06-18 学校法人早稲田大学 磁場形成装置及びこれを用いた粒子加速器
US8927950B2 (en) 2012-09-28 2015-01-06 Mevion Medical Systems, Inc. Focusing a particle beam
EP3342462B1 (fr) 2012-09-28 2019-05-01 Mevion Medical Systems, Inc. Réglage de l'énergie d'un faisceau de particules
EP2901820B1 (fr) 2012-09-28 2021-02-17 Mevion Medical Systems, Inc. Focalisation d'un faisceau de particules à l'aide d'une variation de champ magnétique
CN104813750B (zh) 2012-09-28 2018-01-12 梅维昂医疗系统股份有限公司 调整主线圈位置的磁垫片
EP2900324A1 (fr) 2012-09-28 2015-08-05 Mevion Medical Systems, Inc. Système de commande pour un accélérateur de particules
EP2901821B1 (fr) 2012-09-28 2020-07-08 Mevion Medical Systems, Inc. Régénérateur de champ magnétique
WO2014052709A2 (fr) 2012-09-28 2014-04-03 Mevion Medical Systems, Inc. Contrôle de l'intensité d'un faisceau de particules
US10254739B2 (en) 2012-09-28 2019-04-09 Mevion Medical Systems, Inc. Coil positioning system
WO2014052734A1 (fr) 2012-09-28 2014-04-03 Mevion Medical Systems, Inc. Commande de thérapie par particules
US8791656B1 (en) 2013-05-31 2014-07-29 Mevion Medical Systems, Inc. Active return system
US9730308B2 (en) 2013-06-12 2017-08-08 Mevion Medical Systems, Inc. Particle accelerator that produces charged particles having variable energies
WO2015048468A1 (fr) 2013-09-27 2015-04-02 Mevion Medical Systems, Inc. Balayage par un faisceau de particules
US10675487B2 (en) 2013-12-20 2020-06-09 Mevion Medical Systems, Inc. Energy degrader enabling high-speed energy switching
US9962560B2 (en) 2013-12-20 2018-05-08 Mevion Medical Systems, Inc. Collimator and energy degrader
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
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US11103730B2 (en) 2017-02-23 2021-08-31 Mevion Medical Systems, Inc. Automated treatment in particle therapy
CN111093767B (zh) 2017-06-30 2022-08-23 美国迈胜医疗系统有限公司 使用线性电动机而被控制的可配置准直仪
TW202041245A (zh) 2019-03-08 2020-11-16 美商美威高能離子醫療系統公司 用於粒子治療系統之準直儀及降能器

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DE3148100A1 (de) * 1981-12-04 1983-06-09 Uwe Hanno Dr. 8050 Freising Trinks "synchrotron-roentgenstrahlungsquelle"
GB8421867D0 (en) * 1984-08-29 1984-10-03 Oxford Instr Ltd Devices for accelerating electrons
US4641057A (en) * 1985-01-23 1987-02-03 Board Of Trustees Operating Michigan State University Superconducting synchrocyclotron

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DE2045978A1 (de) * 1969-09-18 1971-03-25 Science Res Council Elektrische Spule zur Erzeugung eines Magnetfeldes
US4038622A (en) * 1976-04-13 1977-07-26 The United States Of America As Represented By The United States Energy Research And Development Administration Superconducting dipole electromagnet

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IEEE TRANSACTIONS ON MAGNETICS, Band 15, Nr. 1, Januar 1979, Seiten 131-133, IEEE, New York, US; G. BIALLAS et al.: "The support and cryostat system for doubler magnets" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0276360A2 (fr) * 1987-01-28 1988-08-03 Siemens Aktiengesellschaft Dispositif magnétique à bobines courbées
EP0277521A2 (fr) * 1987-01-28 1988-08-10 Siemens Aktiengesellschaft Source de radiation synchrotron avec fixation de ses bobines courbées
EP0277521A3 (en) * 1987-01-28 1989-04-26 Siemens Aktiengesellschaft Berlin Und Munchen Synchrotron radiation source with fixation of its curved coils
EP0276360A3 (en) * 1987-01-28 1989-07-26 Siemens Aktiengesellschaft Berlin Und Munchen Magnet device with curved coil windings

Also Published As

Publication number Publication date
JPS61227400A (ja) 1986-10-09
EP0195926B1 (fr) 1990-01-24
EP0195926A3 (en) 1987-12-16
ATE49839T1 (de) 1990-02-15
DE3511282C1 (de) 1986-08-21
DE3668525D1 (de) 1990-03-01
US4745367A (en) 1988-05-17

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