Home > Conference materials > Papers > Effect of thermal radiation on low temperature measurement for various types of temperature sensor installations
Original title:
Effect of thermal radiation on low temperature measurement for various types of temperature sensor installations
Authors:
Urban, Pavel ; Hanzelka, Pavel ; Králík, Tomáš ; Vlček, Ivan ; Srnka, Aleš Document type: Papers Conference/Event: Cryogenics 2017 /14./. IIR International Conference, Dresden (DE), 20170515
Year:
2017
Language:
eng Abstract:
We investigated an effect of thermal radiation (300 K) on precision of low temperature measurement of a sample holder (or sample) in an UHV SEM/SPM microscope working at range down to 20 K for various ways of temperature sensor mounting. We designed a special copper casing for installation of Lake Shore\ntemperature sensors (CernoxTM and Si diodes) encapsulated in SD packages. The sensor body is attached direct to the casing using indium solder. The current leads pertaining to the sensor are thermally anchored but electrically insulated from the casing. Quality of sensors installation in the casing was tested for various ways of mounting on a cooled plate. Insufficient thermal anchoring of electrical wires and thermal shielding were imitated. Comparative measurement was also performed with sensors in SD package mounted without\ncasing. The experiments proved that our special design of temperature sensors casing is adequate for intended application of temperature measurement of sample holder in UHV SEM/SPM microscope. In contrary, measurement precision of unprotected sensors was absolutely unsuitable.
Keywords:
low temperature; temperature sensor; thermal radiation Project no.: LO1212 (CEP), TE01020233 (CEP) Funding provider: GA MŠk, GA TA ČR Host item entry: 14th Cryogenics 2017. IIR International Conference. Proceedings, ISBN 978-2-36215-022-7, ISSN 0151-1637
Institution: Institute of Scientific Instruments AS ČR
(web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences. Original record: http://hdl.handle.net/11104/0274398