Magnetic Amplifier for Use at 4.2°K
- 1 June 1967
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 38 (6), 731-733
- https://doi.org/10.1063/1.1720877
Abstract
A magnetic amplifier used at 4.2°K to measure small dc voltages is described. A sensitivity of 5×10−3 μV was obtained without any precaution other than second harmonic detection for eliminating ac noise. Suggestions for increased sensitivity and comparisons with other techniques are given.Keywords
This publication has 6 references indexed in Scilit:
- High sensitivity d.c. amplifier with superconducting modulatorCryogenics, 1965
- Input stage for a meter for small E.M.F.S with low impedance sourcesCryogenics, 1964
- Thermo-electricity at low temperatures. VI. A redetermination of the absolute scale of thermo-electric power of leadProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1958
- A sensitive superconducting “chopper” amplifierPhysica, 1957
- A superconducting modulatorJournal of Scientific Instruments, 1955
- A superconducting reversing switchJournal of Scientific Instruments, 1955