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Review of Scientific Instruments / Volume 79 / Issue 3 / INVITED ARTICLE

Rev. Sci. Instrum. 79, 031301 (2008); http://dx.doi.org/10.1063/1.2897133 (11 pages)

Invited Article: Development of high-field superconducting Ioffe magnetic traps

L. Yang1, C. R. Brome1, J. S. Butterworth1, S. N. Dzhosyuk1, C. E. H. Mattoni1, D. N. McKinsey1, R. A. Michniak1, J. M. Doyle1, R. Golub2, E. Korobkina2, C. M. O’Shaughnessy2, G. R. Palmquist2, P.-N. Seo2, P. R. Huffman2, K. J. Coakley3, H. P. Mumm4, A. K. Thompson4, G. L. Yang4, and S. K. Lamoreaux5

1Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA
2Physics Department, North Carolina State University, Rayleigh, North Carolina 27695, USA
3National Institute of Standards and Technology, Boulder, Colorado 80305, USA
4National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
5Physics Department, Yale University, New Haven, Connecticut 06520, USA

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(Received 4 May 2007; accepted 17 December 2007; published online 25 March 2008)

We describe the design, construction, and performance of three generations of superconducting Ioffe magnetic traps. The first two are low current traps, built from four racetrack shaped quadrupole coils and two solenoid assemblies. Coils are wet wound with multifilament NbTi superconducting wires embedded in epoxy matrices. The magnet bore diameters are 51 and 105 mm with identical trap depths of 1.0 T at their operating currents and at 4.2 K. A third trap uses a high current accelerator-type quadrupole magnet and two low current solenoids. This trap has a bore diameter of 140 mm and tested trap depth of 2.8 T. Both low current traps show signs of excessive training. The high current hybrid trap, on the other hand, exhibits good training behavior and is amenable to quench protection.

© 2008 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. LOW CURRENT IOFFE TRAPS (MARKS I AND II)
    1. Magnet design
    2. Magnet construction
    3. Quench protection system
    4. Magnet training
    5. Discussion
  3. HIGH CURRENT IOFFE TRAP (MARK III)
    1. The KEK quadrupole magnet
    2. Solenoid design
    3. Solenoid form design
    4. Quench protection
    5. Magnet tests
    6. Discussion
  4. CONCLUSIONS AND FUTURE DIRECTIONS

EDITORIALLY RELATED

  1. Perspective: Magnetic traps for nearly untrappable particles: “Invited Article: Development of high field superconducting Ioffe magnetic traps” [Rev. Sci. Instrum. 79, 031301 (2008)]
    J. G. E. Harris
    Rev. Sci. Instrum. 79, 030901 (2008)RSINAK000079000003030901000001

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KEYWORDS and PACS

Keywords

magnetic field effects, superconducting magnets

PACS

  • 84.71.Ba

    Superconducting magnets; magnetic levitation devices

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2897133

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    A. L. Migdall, J. V. Prodan, W. D. Phillips, T. H. Bergeman, and H. J. Metcalf, Phys. Rev. Lett. 54, 2596 (1985).

    T. Bergeman, R. Erez, and H. J. Metcalf, Phys. Rev. A 35, 1535 (1987).

    S. Gov, S. Shtrikman, and H. Thomas, J. Appl. Phys. 87, 3989 (2000)JAPIAU000087000008003989000001.

    P. R. Roach, Rev. Sci. Instrum. 63, 3216 (1992)RSINAK000063000005003216000001.

    J. G. E. Harris, R. A. Michniak, S. V. Nguyen, W. C. Campbell, D. Egorov, S. E. Maxwell, L. D. van Burren, and J. M. Doyle, Rev. Sci. Instrum. 75, 17 (2004)RSINAK000075000001000017000001.


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