Low Temperature Physics: 31, 998 (2005); https://doi.org/10.1063/1.2127893 (4 pages)
Fizika Nizkikh Temperatur: Volume 31, Number 11 (November 2005), p. 1312-1316    ( to contents , go back )

The ultralow temperature melting curve thermometer with a cold tunnel diod oscillator

V.A. Maidanov, M.I. Milchenko, N.P. Mikhin, A.S. Neoneta, A.V. Polev, V.N. Repin, S.P. Rubets, A.S. Rybalko, S.F. Semenov, Ye.V. Syrnikov, V.A. Shilin, and Ye.O. Vekhov

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: maidanov@ilt.kharkov.ua

Received April 26, 2005

Abstract

The existing methods of measuring pressure in the ultralow temperature melting curve thermometer are analyzed. It is shown that the sensitivity and accuracy of measurement can be improved by using the method of measuring resonance frequency of the LC tank involving the capacitence pressure gange. The low-temperature FET oscillator is describe which made it possible to improve more than by the order of magnitude the sensitivity and accuracy in the range 0.9 mK–1.0 K

PACS:
07.20.Mc - Cryogenics; refrigerators, low-temperature detectors, and other low-temperature equipment
07.07.Df - Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
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