Published 12 issues per year
ISSN Print: 0040-2508
ISSN Online: 1943-6009
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CONTROL AND STABILIZATION OF TEMPERATURE (0.8÷300 K) IN THE CRYODIELECTROMETER OF A GIGAHERTZ FREQUENCY BAND
ABSTRACT
A problem of accurate temperature stabilization and measurement arises during the development of low-temperature radiospectrometers designed for material dielectric parameter measurement in the millimeter waveband and in the wide temperature range. Thermometers used for measurement of low and ultra-low temperatures are usually based on the temperature dependence of particular material properties. Electric resistance thermometers are the most suitable for designing the circuits for temperature measurement and stabilization under the above-mentioned conditions. The temperature controller-stabilizer, being a precise automated block, designed for measurement and stabilization of temperature of the disk dielectric resonator in the 0.8 K÷300 K temperature range is used in the cryodielectrometer of a gigahertz band. The four-wire circuit with alternating-current supply to the thermal sensors is applied. The specialized resistive sensors with different-sign temperature resistance coefficients are tested. The accuracy of resistance detection of about 0.05% is provided. The accuracy of temperature stabilization is higher than ±0.01 K. Results of test experiments on the measurement of low-loss dielectric material parameters at low temperatures are presented.
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Golovashchenko R. V., Zaetz N. K., Ostryzhnyi Ye. M., Plevako A. S., Derkach V. N., Precision temperature measurement unit for the low temperature dielectrometer, 2016 9th International Kharkiv Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW), 2016. Crossref
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Derkach V., Alekseev E., Golovashchenko R., Ostryzhnyi Y., Meshcheryakov A., Tarapov S., A low temperature study of electromagnetic energy loss in low-loss materials in the 110…140 MHz frequency range, RADIOFIZIKA I ELEKTRONIKA, 25, 3, 2020. Crossref