Turns out a jigsaw and a thick aluminium can are a nightmarish combination (although not as nightmarish as the title might suggest).
|The void that is now visible was the liquid |
|The aperture visible directly below the liquid nitrogen |
port allowed nitrogen gas to vent during weekly fills.
Liquid nitrogen was fed into the reservoir through a
similar aperture on the other side.
After our quick progress yesterday through the outer stainless steel layer, it was a real struggle to cut a window into the liquid nitrogen vessel. This vessel is constructed from a sheet of aluminium ca. 4-5mm thick, and getting through it with the jigsaw was hard going!
We have now arrived at a point that differs somewhat from the records we have available and it's not entirely clear how best to proceed. But fortune favours the bold, so forward we go...