RADIATION DAMAGE TO BSCCO-2223 FROM 50 MEV PROTONS Page: 1 of 7
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RADIATION DAMAGE TO BSCCO-2223 FROM 50
A. F. Zeller', R. M. Ronningen', A. Godeke2, L. H. Heilbronn2, p.
McMahan-Norris2, and R. Gupta3
National Superconducting Cyclotron Lab
Michigan State University, E. Lansing, MI 48824 USA
2Lawrence Berkeley National Lab
1 Cyclotron Rd., Berkeley, CA 94720 USA
3Brookhaven National Lab
Upton, NY 11973 USA
The use of HTS materials in high radiation environments requires that the
superconducting properties remain constant up to a radiation high dose. BSCCO-2223
samples from two manufacturers were irradiated with 50 MeV protons at fluences of up to
5 x 10" protons/cm2. The samples lost approximately 75% of their pre-irradiation Ic. This
compares with Nb3Sn, which loses about 50% at the same displacements per atom.
KEYWORDS: BSCCO-2223. Radiation damage.
The magnets in the vicinity of the production target in a heavy ion fragment separator
are subjected to very high doses of neutrons and other nuclear radiation. To maximize
efficiency in capturing the rare isotopes coming from the production target the separator
quadrupoles need high gradients and large apertures. These requirements necessitate using
superconducting magnets. This leads to two problems: The short-term one is removing the
nuclear heating so the magnets stay superconducting. The long-term one is having all
components be resistant to damage. One solution  is to use a High Temperature
Superconductor (HTS) in a superferric quadrupole. This addresses both problems because
the coil can operate at 20 - 30 K, with higher thermodynamic efficiency, and the electrical
insulation can be stainless steel. Normally, the insulation is the most radiation sensitive of
the materials used in a superconducting coil, but the use of stainless steel alleviates this.
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Zeller, A.F.; Ronningen, R.M.; Godeke, Arno; Heibronn, L.H; McMahan-Norris, P. & Gupta, R. RADIATION DAMAGE TO BSCCO-2223 FROM 50 MEV PROTONS, article, November 1, 2007; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc893522/m1/1/: accessed April 18, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.