Low Level Tracking Marginal Oscillator for in situ Magnetic Field Measurements at Low Temperatures
- 1 August 1972
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 43 (8), 1129-1133
- https://doi.org/10.1063/1.1685862
Abstract
A low level NMR spectrometer which operates satisfactorily over the frequency range between 1 and 100 MHz has been developed using standard integrated circuits and field effect transistors. The high gain automatic level control allows rf levels of less than 1 mV to be achieved without adjustment; the system has been used to make in situ magnetic field measurements in superconducting magnet systems with the narrow 1G NMR spectra observed in doped alkali halide specimens at 4.2 K. In conjunction with the marginal oscillator, an automatic tracking system which utilizes capacitor switching is described.Keywords
This publication has 8 references indexed in Scilit:
- Nuclear Resonance Spectrometers Using Field Effect TransistorsReview of Scientific Instruments, 1971
- An automatic self-locking n.m.r. gaussmeterJournal of Physics E: Scientific Instruments, 1971
- de Haas-van Alphen Effect in Dilute Alloys of Bismuth in LeadPhysical Review B, 1970
- Absolute de Haas-van Alphen Frequency Measurements in PotassiumPhysical Review B, 1968
- Nuclear Magnetic Resonance Probe for Calibrating Superconducting SolenoidsReview of Scientific Instruments, 1966
- Self-locking nuclear resonance magnetic field strength meter for 11-65 Mc/sJournal of Scientific Instruments, 1965
- Direct Quartz Crystal Control of a Low-Level Pound-Knight-Watkins Spin MagnetometerReview of Scientific Instruments, 1958
- A Radiofrequency Spectrograph and Simple Magnetic-Field MeterReview of Scientific Instruments, 1950