Design and fabrication of end spacers for a 13 T Nb/sub 3/Sn dipole magnet

Author

Caspi, S. ; Dell´Orco, D. ; Ghiorso, W.B. ; Wandesforde, A.

Author_Institution

Lawrence Berkeley Lab., CA, USA

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

1004

Lastpage

1007

Abstract

A 13 Tesla R&D dipole magnet is being constructed using Nb/sub 3/Sn superconducting cable. The four-layer "cosine-theta" magnet uses a wide cable (/spl sim/15 mm) that will undergo a 650 C reaction after each layer is wound. About 75 bronze spacers at the magnet "ends" separate the winding blocks in such a way that the stored strain energy in the cable is minimized and the integrated field harmonics are reduced. Wax prototypes of the designed spacers were made on a 5-axis milling machine. This method of rapid prototyping required no tooling and enabled us to produce a large number of different end spacers that can be physically inspected and repeatedly modified before final prototypes are made. Spacers were originally machined from wax billets which were later cast in bronze.<>

Keywords

accelerator magnets; copper alloys; harmonics; magnetic fields; niobium alloys; superconducting cables; superconducting magnets; tin alloys; 13 T; 5-axis milling machine; 650 C; CuSn; Nb/sub 3/Sn; Nb/sub 3/Sn dipole magnet; accelerator magnets; bronze spacers; end spacers; fabrication; four-layer cosine-theta magnet; integrated field harmonics; stored strain energy; superconducting cable; superconducting magnets; wax billets; winding blocks separation; Fabrication; Magnetic field induced strain; Magnetic separation; Niobium; Prototypes; Research and development; Superconducting cables; Superconducting magnets; Tin; Wounds;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402720

Filename

402720