“cryostat”的概念、定义、翻译、参考文献-科学参考

cryostat

Physics

A vessel enabling a sample to be maintained at a very low temperature. The Dewar flask is generally used for controlling heat leaking in by radiation, conduction, or convection. Cryostats usually consist of two or more Dewar flasks nesting in each other.

Astronomy

A device designed to maintain an infrared detector or the low-noise amplifier of a radio telescope at a very low temperature in order to reduce thermal noise. In infrared telescopes, cryostats can be evacuated vessels known as dewars cooled by liquid nitrogen (down to 77 K) or liquid helium (down to 4 K), and usually contain optical components, filters, and a preamplifier as well as the detector. In radio astronomy they are usually evacuated chambers cooled to about 12 K by helium-gas refrigerators.

Chemistry

A vessel enabling a sample to be maintained at a very low temperature. The Dewar flask is the most satisfactory vessel for controlling heat leaking in by radiation, conduction, or convection. Cryostats usually consist of two or more Dewar flasks nesting in each other. For example, a liquid nitrogen bath is often used to cool a Dewar flask containing a liquid helium bath.

单词	cryostat
释义	cryostat Physics A vessel enabling a sample to be maintained at a very low temperature. The Dewar flask is generally used for controlling heat leaking in by radiation, conduction, or convection. Cryostats usually consist of two or more Dewar flasks nesting in each other. Astronomy A device designed to maintain an infrared detector or the low-noise amplifier of a radio telescope at a very low temperature in order to reduce thermal noise. In infrared telescopes, cryostats can be evacuated vessels known as dewars cooled by liquid nitrogen (down to 77 K) or liquid helium (down to 4 K), and usually contain optical components, filters, and a preamplifier as well as the detector. In radio astronomy they are usually evacuated chambers cooled to about 12 K by helium-gas refrigerators. Chemistry A vessel enabling a sample to be maintained at a very low temperature. The Dewar flask is the most satisfactory vessel for controlling heat leaking in by radiation, conduction, or convection. Cryostats usually consist of two or more Dewar flasks nesting in each other. For example, a liquid nitrogen bath is often used to cool a Dewar flask containing a liquid helium bath.
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