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单词 cryogenic pump
释义
cryogenic pump
Physics

  • A vacuum pump in which pressure is reduced by condensing gases on surfaces maintained at about 20 K by means of liquid hydrogen or at 4 K by means of liquid helium. Pressures down to 10−8 mmHg (10−6 Pa) can be maintained; if they are used in conjunction with a diffusion pump, pressures as low as 10−15 mmHg (10−13 Pa) can be reached.

Chemistry

  • A vacuum pump in which pressure is reduced by condensing gases on surfaces maintained at about 20 K by means of liquid hydrogen or at 4 K by means of liquid helium. Pressures down to 10−8 mmHg (10−6 Pa) can be maintained; if they are used in conjunction with a diffusion pump, pressures as low as 10−15 mmHg (10−13 Pa) can be reached.

Chemical Engineering

  • A vacuum pump used to produce very low pressures of 10−6 Pa by the condensation of gases onto the surface kept at low temperatures using liquid hydrogen or liquid helium. It is possible to reduce the pressure further to 10–13 Pa with the combined used of a diffusion pump.
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