Hades magnet 17/18 Oct. 1998
At about 15:00 the pressure reduction valve was adjusted to
a new operating point by knocking on it.
The temperature of the liquid Nitrogen follows the pressure variation.
The liquid He level varies due to the variation of the temperature of the heat exchanger.
Its temperature varies due to the fact that it is cooled most of the time by instreaming
Nitrogen gas. Once all gas is removed from the supply line, it gets liquid. This process
happens in cycles which also cause the input pressure to vary in cycles.
last update 18.10.98
by Wolfgang Koenig