TY - JOUR
T1 - The energizing of a nmr superconducting coil by a superconducting rectifier
AU - Sikkenga, J.
AU - Knoben, J.
AU - Spoorenberg, C. J.G.
AU - Kraaij, G. J.
AU - Klundert, L. J.M.v.d.
AU - Ten Kate, H. H.J.
PY - 1985/3
Y1 - 1985/3
N2 - NMR magnets require a good homogeneity within a certain volume and an excellent field stability. The homogeneity can be met using a superconducting shim coil system. The field stability requires a constant current, although in many cases the current decay time constant is too low, due to imperfections in the superconducting wire and joints. This can be overcome using a rectifier. The rectifier can also be used to load the coil. The combination and interaction of the superconducting NMR coil (2.0 Tesla and 0.35 m cold bore) and the rectifier (20 W / 1 kA) is tested. The safety of the system is discussed. The shim coil system can compensate the strayfield of the rectifier. The field decay compensation will be discussed.
AB - NMR magnets require a good homogeneity within a certain volume and an excellent field stability. The homogeneity can be met using a superconducting shim coil system. The field stability requires a constant current, although in many cases the current decay time constant is too low, due to imperfections in the superconducting wire and joints. This can be overcome using a rectifier. The rectifier can also be used to load the coil. The combination and interaction of the superconducting NMR coil (2.0 Tesla and 0.35 m cold bore) and the rectifier (20 W / 1 kA) is tested. The safety of the system is discussed. The shim coil system can compensate the strayfield of the rectifier. The field decay compensation will be discussed.
UR - http://www.scopus.com/inward/record.url?scp=84939376125&partnerID=8YFLogxK
U2 - 10.1109/TMAG.1985.1063857
DO - 10.1109/TMAG.1985.1063857
M3 - Article
AN - SCOPUS:84939376125
SN - 0018-9464
VL - 21
SP - 440
EP - 443
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 2
ER -