cold trap


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cold trap

[′kōld ‚trap]
(mechanical engineering)
A tube whose walls are cooled with liquid nitrogen or some other liquid to condense vapors passing through it; used with diffusion pumps and to keep vapors from entering a McLeod gage.
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References in periodicals archive ?
Part 8 public contract with a vacuum concentrator with a cold trap for proteomic work;
One of nitrogen's roles on Earth is to help form a low-temperature layer in the atmosphere that water can't get past, called a cold trap.
8226; Plans for polar cold trap craters, skylights, and peaks investigations
This allows operation without any cold trap, and thus reduces the total cost of ownership.
homogenizer, washers, vacuum concentrator with a cold trap for proteomic work and speedvac - a centrifugal vacuum concentrator trap
Polycold is a leading manufacturer of low- temperature refrigeration systems including water-vapor cryopumps, cryocoolers, cold trap chillers and gas chillers.
Assembling thousands of ions in a cold trap produces the equivalent of a one-component plasma -- a collection of charged particles, all with the same mass and charge, embedded in a uniform, oppositely charged background.
This combined data led the science team to conclude the water is not uniformly distributed within the shadowed cold traps, but rather is in pockets, which may also lie outside the shadowed regions.
Water ice deposits in such cold traps remain covered by a thin layer of lunar rock.
New is details of hot and cold traps, runners and trainers - plus other stats.
The sun never reaches these so-called cold traps, so the water is locked up as ice, explains Spudis.
We find that areas of the crater floors at the poles that are in permanent shadow from the Sun, which are potential cold traps for water or other volatiles, do not give rise to strong radar echoes like those associated with thick ice deposits in the polar craters on Mercury,' wrote the scientists.