Physics

A miniature tunnel diode oscillator for condensed matter physics experiments

Document Type

Article

Abstract

We have developed a new design for a small tunnel diode oscillator circuit, which minimizes eddy current pickup in changing magnetic fields, minimizes parasitic reactance for achieving high frequency operation, and is small enough to fit in the confined spaces that are common in high magnetic field dilution refrigerator environments. The new design has been tested up to 1.5 GHz and at temperatures from room temperature down to 25 mK. We have also used the system to take measurements up to 60 T in a pulsed magnetic field. In this manuscript, we analyze the circuit and give guidance for using the circuits and the limits of operation. © 2025 Author(s).

Publication Title

Review of Scientific Instruments

Publication Date

2025

Volume

96

Issue

10

ISSN

0034-6748

DOI

10.1063/5.0284981

Keywords

Eddy current testing, electric network analysis, magnetic fields, oscillators (electronic), refrigerators, tunnels

Cross Post Location

Student Publications

Link to Full Text

Share

COinS