Andrew Yee (or somebody else of the same name) wrote thusly in message
:

The XRS is structured to cool down its X-ray micro-calorimeter (or the
detector) through freezing to the absolute temperature of 60
milli-degrees (or minus 273.09 degrees Celsius) for its operations. The
freezer is further wrapped by liquid helium and solid neon. In the early
stage, the cooling equipment was smoothly prepared for the operation,
and the detector successfully reached 60 milli-degrees, which is a world
record for a low temperature, and X-ray spectrum performance was
verified as being scheduled. However, on August 8, we found that all
loaded liquid helium had evaporated. As a result of this anomaly, the
detector cannot be cooled down; therefore, the scheduled observations
will be very difficult to carry out. The cause of the anomaly is
currently under investigation.

Why is this being called an "anomaly"? Surely "fault" or "cockup" would be a
better description? Or would that imply that somebody is to blame?

--
A couple of questions. How do I stop the wires short-circuiting, and what's
this nylon washer for?

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