University of Wisconsin-Madison Physical Sciences Lab

Archive for May, 2013

Daya Bay: Job Done

Monday, May 20th, 2013

A shipping container and a large tank were returned from the Daya Bay project.  The container had a large amount of equipment, including the vessel filling system.  The large tank was used in the detector filling process and held doped gadolinium scintillator that was pumped into the inner-most vessel.  The equipment was returned to the U.S. because the filling hall is going to be repurposed for another experiment.

The Daya Bay project found the mixing angle of neutrinos, which was named by Science magazine as a “Breakthrough of the Year” for 2012.

From a Galaxy Far, Far Away?

Friday, May 10th, 2013

The IceCube neutrino telescope detected two high power neutrinos that researchers believe are from further out in our galaxy, or are from another galaxy.  Most neutrinos IceCube detects come from our Sun, however these two events had higher energy than the more local neutrinos.  The two events had an energy of 1.04 ± 0.16 (August 2011) and 1.14 ± 0.17 (January 2012) PeV.  This is hundreds of times more than the energy of a proton at the Large Hadron Collider.