A small gas thermometer for use at low temperatures
Abstract
This paper describes a 2-cm dia x 5-cm long gas thermometer that uses an extremely stable tunnel diode oscillator. When biased with a dc current of 114 micro A (15 micro W), it emits a frequency between 456 and 463 MHz, depending on the pressure of its 0.39 ml sample of permanently trapped He3 gas. Measurements of the dependence of its frequency on temperature and magnetic field are presented, as well as preliminary tests of its drift and noise.
- Publication:
-
ISA Transactions
- Pub Date:
- 1980
- Bibcode:
- 1980ISAT...19...15V
- Keywords:
-
- Gas Temperature;
- Helium Isotopes;
- Low Temperature;
- Temperature Measurement;
- Thermometers;
- Magnetic Fields;
- Oscillators;
- Temperature Dependence;
- Tunnel Diodes;
- Instrumentation and Photography