Development and test of a BSCCO-2223 HTS high field insert magnet for NMR

Abstract

In this paper we describe the successful design, fabrication and test of a model high field insert magnet utilizing BSCCO-2223 tape conductors. This insert magnet is the first phase of a program to demonstrate the use of HTS conductors for the generation of the high magnetic fields required for NMR. The magnet, designed and fabricated at Intermagnetics, consists of five double pancake coil modules stacked in series to give overall dimensions of 48 mm outer diameter, 72 mm length and a 19 mm clear bore. The double pancake coil modules were prepared using a wind and react technique followed by encapsulation with low temperature resistant epoxy. The assembled magnet was then tested at both 77 K and 4.2 K in fields of up to 17 Tesla. The high field tests were conducted at the NHMFL. At 4.2 K, with a 17 Tesla applied field, an additional central field of 0.24 Tesla was developed before transition to the normal state. These results indicate the ability of these materials to be used in high field insert coils.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>