Cryostream Compact

Whether 700 series, Plus or Compact, all Cryostream systems have the same unique mode of operation, allowing the systems to offer faster cool-down, higher stability, lower LN2 comsumption and superior laminar flow than most other commercially available systems.

Liquid nitrogen is drawn up by the action of the diaphragm pump from an unpressurised supply vessel, through a flexible vacuum insulated transfer line, into the Cryostream coldhead.

The liquid nitrogen, once inside the Cryostream coldhead, passes through a heater, which evaporates most of the liquid into vapour at the boiling point of liquid nitrogen. This vapour then flows outward along one path of the heat exchanger, through the temperature controller, to arrive at the inlet of the diaphragm pump at approximately 10 K below room temperature. The nitrogen gas from the pump is then dried with a line drier unit to ensure there is no moisture in the gas flow.

The flow rate of the gas from the pump is then regulated by a variable flow controller. This gas flows back into the Cryostream coldhead where it is recooled along the second path of the heat exchanger. After returning to the cold end of the heat exchanger, the gas temperature is regulated by a heater and sensor before entering the nozzle of the Cryostream. The gas then flows along the isothermal nozzle and out over the sample. The temperature indicated on the Controller is a mapped temperature for the crystal position.