EP2599134B1 - Hochtemperatur-supraleiter-magnetsystem - Google Patents

Hochtemperatur-supraleiter-magnetsystem Download PDF

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Publication number
EP2599134B1
EP2599134B1 EP10743028.2A EP10743028A EP2599134B1 EP 2599134 B1 EP2599134 B1 EP 2599134B1 EP 10743028 A EP10743028 A EP 10743028A EP 2599134 B1 EP2599134 B1 EP 2599134B1
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EP
European Patent Office
Prior art keywords
hts
magnet system
poles
coil body
disposed
Prior art date
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Active
Application number
EP10743028.2A
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German (de)
English (en)
French (fr)
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EP2599134A1 (de
Inventor
Cristian Boffo
Thomas Gerhard
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Bilfinger Noell GmbH
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Babcock Noell GmbH
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/08—Deviation, concentration or focusing of the beam by electric or magnetic means
    • G21K1/093—Deviation, concentration or focusing of the beam by electric or magnetic means by magnetic means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G2/00—Apparatus or processes specially adapted for producing X-rays, not involving X-ray tubes, e.g. involving generation of a plasma
    • 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

Definitions

  • the invention relates to a high-temperature superconductor (HTS) magnet system, preferably for an insertion device for generating a high-intensity synchrotron radiation according to the features of the first claim.
  • HTS high-temperature superconductor
  • the device is not limited to this use, but can also be used for all other suitable applications.
  • insertion devices In synchrotron light sources, so-called insertion devices, undulators and wigglers are used to generate highly brilliant radiation that is used for many different types of experiments. These devices generate a periodically alternating magnetic field on the beam axis with the period length being well defined. As the electrons pass through the field, they are forced onto an oscillating trajectory by this field configuration and emit synchrotron radiation ( Fig.1 ). In the special case of an undulator, the period length of the magnetic field is exactly matched to the wavelength of the synchrotron radiation. This leads to stimulated emission, which generates coherent light in a very narrow bandwidth. Due to the periodic transverse oscillation of the particles, the resulting spontaneous emission is mainly coherent and of narrow spectral linewidth, as in " CS Hwang, Chang CH, NSRRC, Hsinchu, Taiwan, IPAC 2010 Proceedings is described.
  • Undulators and wigglers are made of permanent magnets and electromagnets.
  • a bobbin for an electromagnetic undulator is in DE 10 2007 010 414 A1 This document does not deal with the manner of producing an HTS-based magnet coil arrangement for generating the desired field. In this case, two yokes are aligned with each other so that they are symmetrical to the beam axis of the electron beam and produce the desired field.
  • the use of permanent magnets for undulators and wigglers goes back to the first prototypes.
  • the magnetic flux is directed through the poles, by energizing the adjacent coils in opposite directions ( Fig.2 ).
  • permanent-magnet undulators are the most common solution, but limited in their maximum field.
  • superconducting insertion devices achieve higher magnetic fields and thus allow a higher electron flow and / or higher photon energies than the permanent magnetic systems, which is desired for future experiments.
  • Several superconducting insertion devices have been built, but their coils are standard made from the low-temperature superconductor (LTS) niobium-titanium (NbTi).
  • LTS low-temperature superconductor
  • NbTi niobium-titanium
  • the coils are usually wound together from as possible a continuous conductor with only a few interruptions. Interruptions are therefore avoided because heat is often generated on them, which means additional thermal loads for the system. This means a lot of effort for the winding process, since the coils must also be wound in each case in different directions to produce the alternating magnetic field.
  • these LTS coils which are therefore also protected from the outside by cold shields, must be cooled to cryogenic temperatures of about 4 K, typically with cryocoolers. They form the so-called "cold mass" with everything that has the lowest temperature in the cryostat.
  • Cryo-coolers are refrigerators with a closed cooling circuit, by which the achievement of cryogenic temperatures is possible and by which a bath cooling with liquid helium can be bypassed, which greatly simplifies the use of the magnet.
  • Commercial systems produce up to 1.5 W of cooling power at a temperature of 4.5 K.
  • the cooling capacity depends strongly on the operating temperature of the application to be cooled. The higher the operating temperature, the higher the available cooling capacity.
  • a problem related to the solution for superconducting insertion devices is the handling of the heat input at cryogenic temperatures produced by the wave motion of the electron beam.
  • the total heat quantity of a beam of synchrotron radiation source according to the third generation can " TPS storage ring ", JC Jan, CS Hwang and PH Lin, NSRRC, Hsinchu, Taiwan” Proceedings EPAC 2008 " and " Casalbuoni, A. Gray, M. Hagelstein, R. Rossmanith, Anlagenstechnik Düsseldorf, Germany, F. Zimmermann, CERN, Geneva, Switzerland, B. Kostka, E. Mashkina, E. Steffens, University of Er Weg, Germany, A. Bernhard, D. Wollmann, T. Baumbach; University of Düsseldorf, Germany, Proceedings PAC 2007 over 10W.
  • the cooling system of the magnet which must be kept at a temperature of 4.2K at all times in order to operate, is typically disconnected from the jet pipe cooling system to minimize the number of cryocoolers.
  • This solution makes it possible to keep the jet pipe at a higher temperature compared to the magnet, so that the cooling coolers still have sufficient cooling power available to compensate for the heat input of the jet.
  • this has proved to be a viable solution, the technical difficulties and safety of the magnet system could be greatly improved if one could operate the magnet at the same temperature as the beam tube.
  • HTS high-temperature superconductor
  • the solution according to the invention provides a bobbin, the cylindrical, oval, rectangular, quadrangular, as a block consisting of plates u. a. m. can be executed.
  • a bobbin poles On the lateral surface of the bobbin poles are arranged with windings therebetween, wherein the windings constitute an HTS guide band.
  • the above problem is basically solved by replacing the low-temperature superconducting wire (LTS) used in standard superconducting insertion device magnet systems with an HTS guide band.
  • the HTS conduction band becomes superconducting even at the temperature of liquid nitrogen (77 K), and when operating at lower temperatures, the performance parameters of the conductor can increase significantly.
  • first magnets made of HTS conductors are manufactured and used, such as a sextupol at the National Synchrotron Lightsource Source in the USA (" Insertion Devices R & D for NSLS-II ", T. Tanabe, DA Harder, G. Rakowsky, T. Shaftan and J. Skaritka, National Synchrotron Light Source-II, Brookhaven National Laboratory, Upton, New York, USA, Proceedings PAC 2007 ). This magnet is responsible for focusing the particle beam in an accelerator.
  • poles which are not coaxial with the yoke are applied to the inwardly directed lateral surface on a self-contained yoke which forms a kind of circle.
  • the poles of the bobbins of the present invention are coaxially disposed thereon.
  • the pole is used as a wound body and the coils wound around same. The coils are wound as so-called double pancakes, so that both electrical contacts lie on the outer radius of the coil.
  • HTS-Leitb several, preferably two, HTS-Leitb sections are connected to each other by means of a connecting part so that in the connected coils an opposite current flow ( Fig.2 ), ( Figure 4 ) to produce the desired magnetic field configuration.
  • the conductive band preferably has a rectangular or similar cross-section.
  • the proposed solution requires two findings: A new winding scheme to generate the required magnetic field configuration using HTS guide band for the magnet system, such as undulators, wigglers and insertion devices of application-relevant length.
  • FIG. 1 and 2 show the basic principle of working according to the prior art known undulators.
  • FIG. 3 shows a superconducting insertion device that is state of the art.
  • the FIG. 1 shows the basic principle of an undulator with an electron 1 on the radiation axis 2, wherein above and below the radiation axis 2 north and south poles 4 of the magnetic field are arranged.
  • the device shown as a cut-out, generates a periodically alternating magnetic field on the radiation axis 2, the period length being precisely defined.
  • the electrons 1 pass through the field, they are forced onto an oscillating trajectory 3 by this field configuration and thus emit synchrotron radiation 5 of the electron 1.
  • FIG. 2 shows the section of two winding bodies 6 of a magnet system with the principle of an insertion device with counter-energized magnetic coils 9,11 whose magnetic flux 10,12 amplified in the poles.
  • the winding body 6 with magnetic coils 9, 11 are arranged opposite, wherein the radiation axis 2 passes between the winding body 6 with poles.
  • the magnetic flux 10, 12 generated by the magnetic coils 9,11 generates a magnetic field for which the largest magnetic field vector 7 between the winding bodies 6 has been drawn.
  • FIG. 3 shows the schematic representation of a superconducting insertion device with the cryocooler 8 at the beam tube 14 through which the radiation axis 2 leads.
  • Cryostat 15, the undulator magnet 17, consisting of the upper and the lower yoke, as well as the cold mass 18 are also shown in the figure. The disadvantages and the mode of operation of this device have already been described.
  • FIG. 4 shows a schematic representation of the partial section AA of the bobbin 6 of FIG. 5 with elevations, wherein HTS winding packages 13 in individual layers 23, 24, consisting of HTS guide strip 23 and insulating film 24, are arranged one above the other. These layers represent the field-generating magnetic coils with different energization, in which the direction 19 of the current flow through the coils was drawn.
  • the connecting piece 16, 20 is arranged between the coils above and below, so that a current flow can take place.
  • FIG. 5 shows the winding body 6 for the solution according to the invention in view with several continuous poles 22 with the section AA. Between the continuous poles 22, the connecting piece 20 can be seen at the beginning of the winding in a recess on the pole 21, wherein the connecting piece 20 connects two HTS conductor strips 23 to one another under which an insulation film pair 24 is located. Between the respective pairs 23, 24, a pole 21 is arranged with a recess.
  • FIG. 4 shown and described new winding scheme allows to wind all the coils in the same direction as that in FIG. 5 you can see.
  • the alternating magnetic field structure typical of an undulator or winding is created by properly connecting the coils to each other to control the current flow as in FIG. 4 is shown that an opposite current flow is produced.
  • the bare HTS conductive strip 23 is wound simultaneously with an insulating tape 24 parallel to the winding body 6.
  • two Leitb sections 23 are soldered to a HTS plate 20 so as to connect them electrically.
  • the wafer is glued to the winding core 6 so as to be able to build up tension during the winding process.
  • the two conductors 23 are simultaneously wound parallel to each other and with the insulating films 24.
  • the leader tape is fixed and cut to wind two new spools.
  • the Polerhöhungen 21 of the bobbin 6 have recesses where one of the lower connecting pieces 20 must be, and continuous Polerhöhungen 22, where the winding segments 25 are electrically connected to each other via a top-mounted connector.
  • FIG. 6 Fig. 2 shows how the two coils are connected to the two previous ones to measure the electrical flux as in FIG. 4 shown to produce. This procedure greatly simplifies the winding process and, if necessary, individual coil pairs can be replaced by the modular arrangement.
  • the scheme can be applied to any possible configuration of an HTS magnet system of an insertion device and is therefore also suitable for use in so-called free electron lasers and other particle accelerator based light sources.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Particle Accelerators (AREA)
EP10743028.2A 2010-07-30 2010-07-30 Hochtemperatur-supraleiter-magnetsystem Active EP2599134B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/004656 WO2012013205A1 (de) 2010-07-30 2010-07-30 Hochtemperatur-supraleiter-magnetsystem

Publications (2)

Publication Number Publication Date
EP2599134A1 EP2599134A1 (de) 2013-06-05
EP2599134B1 true EP2599134B1 (de) 2015-01-21

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EP10743028.2A Active EP2599134B1 (de) 2010-07-30 2010-07-30 Hochtemperatur-supraleiter-magnetsystem

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US (1) US8849364B2 (da)
EP (1) EP2599134B1 (da)
DK (1) DK2599134T3 (da)
ES (1) ES2533225T3 (da)
WO (1) WO2012013205A1 (da)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201217782D0 (en) * 2012-10-04 2012-11-14 Tesla Engineering Ltd Magnet apparatus
GB201515978D0 (en) 2015-09-09 2015-10-21 Tokamak Energy Ltd HTS magnet sections
DE102015223991A1 (de) * 2015-12-02 2017-06-08 Bruker Biospin Ag Magnetspulenanordnung mit anisotropem Supraleiter und Verfahren zu deren Auslegung
US10249420B2 (en) 2015-12-08 2019-04-02 Uchicago Argonne, Llc Continuous winding magnets using thin film conductors without resistive joints
US10646723B2 (en) * 2016-08-04 2020-05-12 The Johns Hopkins University Device for magnetic stimulation of the vestibular system
US10062486B1 (en) * 2017-02-08 2018-08-28 U.S. Department Of Energy High performance superconducting undulator
US10485089B2 (en) * 2017-09-07 2019-11-19 National Synchrotron Radiation Research Center Helical permanent magnet structure and undulator using the same
HUE061469T2 (hu) * 2018-10-15 2023-07-28 Tokamak Energy Ltd Magas hõmérsékletû szupravezetõ mágnes
US11600416B1 (en) 2021-08-16 2023-03-07 National Synchrotron Radiation Research Center Cryogen-free high-temperature superconductor undulator structure and method for manufacturing the same

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Publication number Priority date Publication date Assignee Title
DE102007010414A1 (de) 2007-03-01 2008-09-04 Babcock Noell Gmbh Wickelkörper für elektromagnetische Undulatoren

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Publication number Publication date
DK2599134T3 (da) 2015-04-13
EP2599134A1 (de) 2013-06-05
ES2533225T3 (es) 2015-04-08
WO2012013205A1 (de) 2012-02-02
US20130130914A1 (en) 2013-05-23
US8849364B2 (en) 2014-09-30

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