Heating of the outer surfaces id done by three heating band, 200W each. These are kept in close contact with the surface by a clever(?) arrangement. The tube to the lower left leads to the vacuum pump.
Heating of the outer surfaces id done by three heating band, 200W each.
These are kept in close contact with the surface by a clever(?)
arrangement.
The tube to the lower left leads to the vacuum pump.
At the bottom, the device for heating the cold table is seen.
Air is blown into one of the two liquid Nitrogen filling tubes. The
air is heated by a 200W element just outside the inlet.
The vacuum pump can be seen in the background.
Insulation is put on top of the vessel, making outer surface temperatures
of at least 80C possible.
At the bottom are the controller boxes, from which pressure and four
temperature sensors are read and transmitted to a computer for logging.
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Last updated April 14, 1999 by norup@astro.ku.dk