Quadrupole magnets for the SSC

Abstract

At LBL, we have designed, constructed, and tested four short (lm) models and six full-size (5m) models of the Superconducting Super Collider (SSC) main-ring 5 meter focusing quadrupole magnet (21 1 Teskdmeter). The results of this program are herein summarized.

SSC Quadrupole Magnet Performance at LBL

“…The low ramprate sensitive magnets had either been collared more than once (QSC40I, QCC405) or used a new conductor surface treatment (QCC406). These magnets also exhibited higher maximum MIlTs [6] «9 MIlTs, unprotected). Figure 3 shows the 4.3K, 16A1s training behavior of these magnets.…”

“…The test procedures are discussed in detail elsewhere [6]. Magnets were tested in a horizontal boiling helium (iAtm) cryostat.…”

“…The magnetic, strain-gage and training responses to two thermal cycles were measured. The quadrupole gradient, and relative multipole purity were determined from Fourier analysis of the rotating coil signals [4,6]. Magnetic and strain-gage measurements were taken on-the-fly.…”

“…The early short (1m) magnets were also trained at 1.8K (lOkA) to help identify potential weak areas. The MIlTs [6] were calculated to compare various magnet protection methods.…”

“…Coil construction and magnet assembly details can be found elsewhere[I, 2,6]. In summary, all coils were wound under tension with 30-strand NbTi cable, and insulated with Kapton and epoxy-impregnated fiber-glass cloth.…”