Specialists of ASTROHN Technology Ltd developed and manufactured an MCS cryoagent vacuum pumping and filling station

Specialists of ASTROHN Technology Ltd developed and manufactured an MCS cryoagent vacuum pumping and filling station

As a part of work on creating and launching a line for mass production of microcryogenic systems (MCS), ASTROHN Technology Ltd highly qualified specialists in microcryogenic and vacuum systems have designed and developed an MCS cryoagent (gaseous helium) vacuum pumping and filling station. Microcryogenic systems are designed for cooling far and medium IR photoreceiving modules (PRM) to cryostatting temperatures in the range of 60-150 K, based on the type of photoreceiver. Cooling is necessary to achieve the required PRM photovoltaic characteristics (sensitivity, detectivity, etc.).

The developed station operates as follows. Air is removed from the MCS operating volume by an oil-free spiral vacuum pump as a result of short-term pumping, thus creating a vacuum of up to 10-3 mmHg. Next, the evacuated volume is filled with extra-pure gaseous helium with a purity of 99.9999 until it reaches operating pressure. This method provides the least amount of impurities in the operating volume of the microcryogenic system, thereby increasing its service life.

The station has been developed in Russia for the first time and has no analogs. The station features high reliability, efficiency, and safety during operation, and has passed metrological examination.

Filling of MCS manufactured by ASTROHN Technology Ltd with inflating gas (helium) with preliminary evacuation of the internal cavity of microcryogenic systems is necessary for the Stirling cycle.