The Avantgarde CCV-TRAP Closed Circuit Cryogenic Cold Trap can be used in conjunction with existing laboratory gas separation test equipment for the separation and analytical testing of adsorbed noble gases including helium, neon, argon, krypton and xenon. Cryogenic cold traps are useful for extracting such gases from geologic materials collected in volcanic hot springs to gain insight into the planetary evolution of the Earth. They are also used to adsorb various oxygen isotopes from meteorites and polar ice caps, as well as marine island peridotites.

How cold traps work:

When the inert gas mixture enters the cryogenic cold trap, for example, the inert gases are composed of four gases, A, B, C and D, of which the liquefaction point of gas A is 18 K, the liquefaction point of gas B is 25 K, the liquefaction point of gas C is 38 K, and the liquefaction point of gas D is 46 K. In order to realize the separation of the four gases, the cryogenic cold trap starts to cool down to the lowest temperature of about 10 K, at which time the four gases are completely liquefied, and after liquefaction, the system is operated by the system. After liquefaction, the system temperature is controlled and raised to 40 K. At this time, gas D remains in liquid state, and gases A, B, and C become gases again, and the gas mixture in the system is pumped away, leaving only gas D in the system. Raise the temperature of the system again to about 50K or higher, so that the D gas gas gasification again, the gasification of the gas extraction, that is, the D gas from the mixture of gases is separated. Repeating such steps, relying on the principle of different liquefaction points of various gases, the system achieves gas separation by controlling to achieve different temperatures.

System characteristics:

- Cold trap type: bipolar (dual sample tube) cold trap, only a single target sample area temperature is monitored and controlled
- Temperature range: 10K ~ 325K, continuously adjustable and controllable
- Temperature stability: ±100mK @ full temperature range
- Re-liquefaction prevention: Dual heat sink connection between the top end of the radiation screen and the gas-tight tube, with pre-installed heaters and sensors.
- Anti-icing design: the vacuum connection where the gas-tight tube is located is equipped with independent temperature monitoring and control to solve the problem of icing and frosting.
- Low-temperature activated carbon design: low-temperature activated carbon is installed in the primary cold head part, which is used to cool the activated carbon with its own low temperature to form a carbon adsorption pump and maintain its own vacuum after the external pump stops working.
- The airtight tube and vacuum cover are sealed directly by VCR connector.
- Temperature control system with temperature acquisition program