Design and testing of the 1.5 T superconducting solenoid for the BaBar detector at PEP-II in SLAC

Author

O´Connor, T.G. ; Shen, S. ; Fabbricatore, P. ; Farinon, S. ; Musenich, R. ; Priano, C. ; Bell, R.A. ; Berndt, M. ; Burgess, W. ; Craddock, W. ; Keller, L. ; Dormicchi, O. ; Moreschi, P. ; Penco, R. ; Valente, P. ; Valle, N.

Author_Institution

Lawrence Livermore Nat. Lab., CA, USA

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

847

Lastpage

851

Abstract

The 1.5 T superconducting solenoid is part of the BaBar detector located in the PEP-II B-Factory machine at the Stanford Linear Accelerator Center. The solenoid has a 2.8 m bore and is 3.7 m long. The two layer solenoid is wound with an aluminum stabilized conductor which is graded axially to produce a +/3% field uniformity in the tracking region. The 24 month fabrication, 3 month installation and 1 month commissioning of the solenoid were completed on time and budget. This paper summarizes the culmination of a 3 year design, fabrication and testing program of the BaBar superconducting solenoid. Critical current measurements of the superconducting strand, cable and conductor, cool-down, operation with the thermosyphon cooling, fast and slow discharges, and magnetic forces are discussed in detail.

Keywords

accelerator magnets; critical current density (superconductivity); linear accelerators; magnetic fields; solenoids; superconducting magnets; 1.5 T; 2.8 m; 3.7 m; BaBar detector; PEP-II B-Factory machine; Stanford Linear Accelerator Center; aluminum stabilized conductor; critical current measurements; design; fabrication; magnetic field uniformity; superconducting solenoid; testing program; tracking region; two layer solenoid; Boring; Conductors; Detectors; Fabrication; Linear accelerators; Solenoids; Superconducting cables; Superconducting epitaxial layers; Testing; Wounds;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783429

Filename

783429