Original title: Cryostat for optical measurements in temperature range 80 - 300 K
Authors: Dupák, Jan ; Hanzelka, Pavel
Document type: Papers
Conference/Event: Cryogenics /6./, Praha (CZ), 2000-10-10 / 2000-10-13
Year: 2000
Language: eng
Abstract: A liquid nitrogen bath cryostat of classical concept was designed, manufactured and tested. A 0.4 litres vacuum-insulated inner vessel is suspended on a thin-wall neck. The specimen folder equipped with a temperature sensor and a heating winding is connected to the bottom of the inner vessel by means of a low-conductivity stainless steel tube. Copper foil strips of different cross-section areas are used to span this tube so that the entire thermal resistance between the vessel and the specimen holder can be adjusted in wide range. The rate of the specimen cooling can be changed this way. Using methods that consider both the non-linear dependence of thermal properties of materials and the influence of heat radiation, evaluations of the specimen cooling rate for different magnitudes of the thermal resistance have been made. Nitrogen consumption in various cryostat regimes was calculated too. These predicted values were compared with the experimental ones.
Project no.: CEZ:AV0Z2065902 (CEP), KSK1067601 (CEP)
Funding provider: GA AV ČR
Host item entry: Proceedings of the 6th Cryogenics 2000 IIR International Conference - Refrigeration Science and Technology, ISSN 0151-1637
Note: Související webová stránka: mailto:dupak@isibrno.cz

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/11104/0100884

Permalink: http://www.nusl.cz/ntk/nusl-29481


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Research > Institutes ASCR > Institute of Scientific Instruments
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