Helium Recovery Heater

The helium recovery heater is a 2000 W heating element that is built into a KF-40 tube. It is to be connected right after the last overpressure valve of the cryostat. The heater is operated with the help of a separate box that contains a PID controller.  The target temperature of the heating element is typically set for 30 degrees. In this way, the helium flowing from the cryostat towards the recovery line is brought to temperatures above 0 degrees within the 13 cm of the heated tube, so that the recovery line does not freeze anymore. The system will set off an alarm if the temperature is out of the desired range.

Created by Peter Märki and Beat Bräm from the Nanophysics group of Prof. Ensslin at ETH Zurich.