The Superconducting Horizontal Bend Magnet for the Jefferson Lab´s 11 GeV/c Super High Momentum Spectrometer

Author

Chouhan, Shailendra ; DeKamp, Jon ; Zeller, Al ; Brindza, Paul ; Lassiter, Steve ; Fowler, Mike ; Sun, Eric

Author_Institution

Nat. Supercond. Cyclotron Lab., Michigan State Univ., East Lansing, MI, USA

Volume

20

Issue

3

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

226

Lastpage

229

Abstract

A collaboration between NSCL and Jlab has developed the reference design and coil winding for Jlab´s Super High Momentum Spectrometer (SHMS) horizontal bend magnet. A warm iron ??C?? type superferric dipole magnet will bend the 12 GeV/c particles horizontally by 3?? to allow the SHMS to reach angles as low as 5.5??. This requires an integral field strength of up to 2.1 T.m. The major challenges are the tight geometry, high and unbalanced forces and a required low fringe field in primary beam path. A coil design based on flattened SSC Rutherford cable that provides a large current margin and commercially available fiberglass prepreg epoxy tape has been developed. A complete test coil has been wound and will be cold tested. This paper present the modified magnet design includes coil forces, coil restraint system and fringe field. In addition, coil properties, quench calculations and the full mechanical details are also presented.

Keywords

accelerator magnets; electron accelerators; linear accelerators; superconducting coils; superconducting magnets; Jefferson Lab; Jlab SHMS; NSCL; coil forces; coil restraint system; coil winding; fiberglass prepreg epoxy tape; flattened SSC Rutherford cable; fringe field; integral field strength; superconducting horizontal bend magnet; superhigh momentum spectrometer; warm iron C type superferric dipole magnet; Cryostat; dipole magnet; superferric; warm iron;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2038715

Filename

5371980