Coolstar Coldheads

Oxford Cryosystems are delighted to announce that we have now taken over the worldwide manufacturing and distribution of the Ricor Coolstar^® coldheads.

These coldheads use the Gifford McMahon refrigeration cycle, and by adopting a simple pneumatic drive mechanism, the need for complex mechanical linkages is eliminated and the coldhead can be driven by a small, low vibration stepper motor. This design offers a unique approach to refrigeration control. Since motor speed can easily be regulated to vary the cycle rate, cooling power is controlled.
A standard application of this facility is fast cooldown, achieved by running the coldhead at boost speed. After reaching the desired temperature, the control system automatically switches to a lower speed for normal operation. If required, additional speed control can be achieved by the use of a simple dedicated user interface.