Last week Dr. Reinhard and his students detected ultracold rubidium atoms in a magneto-optical trap for the first time. The atoms, seen below with an infrared sensitive camera, have a temperature of about 100 micro Kelvin, or about a million times colder than room temperature. For reference, the surface of the sun is only about 20 times hotter than room temperature.
The MicroBooNE detector is now full of liquid argon!
Nine tanker trucks put 34,000 gallons of liquid argon into the detector, finishing July 9. The fill was carefully watched by everyone at Fermilab, with Dr. Tagg’s silly but useful webpage. (Warning: soundtrack.)
Interesting and inspiring article on the (history and) future of physics by Frank Wilczek.