Semiautomatic bridge for high-precision dc resistance measurements on pure metals at low temperatures.
A self-balancing bridge system with a dc current comparator and a superconducting flux-gated galvanometer is described. The bridge is capable of measuring small resistances (10(-4)-10(-7) Omega) at liquid helium temperatures with an accuracy of 1 ppm.
van Kempen
H
H
Physics Laboratory and Research Institute for Materials, University of Nijmegen, Toernooiveld, Nijmegen, The Netherlands.
Neyenhuisen
H W
HW
Ribot
J H
JH