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Overview of the DUNE Experiment

March 14, 2017

Matthew Bass (right) 20170314_154910.jpgdescribed the DUNE experiment at Fermilab, where the near detector hall is 205 ft below ground. There are multiple designs being considered for this, like a liquid argon TPC, or a high-pressure gas argon TPC, or hybrid designs. The far detector is located at Sanford mine. It is a 40 kton liquid argon TPC, in four modules. The modules will be installed in stages, and the modules will not necessarily be identical.

The construction at the far site begins this year, and the installation will occur in 2021. Physics data will take place in 2024, with 20 kton mass. In 2026 the neutrino beam becomes available.

DUNE will focus on long-baseline oscillation, electron neutrino appearance. The large value of theta_13 allows for a significant appearance sample to be collectable by DUNE. One can measure matter effects together with theta_13, theta_23, and delta_CP in a single experiment. Matter effects increase the appearance probability in the normal mass hierarchy. At long baseline these effects are important and provide added sensitivity. The long baseline also breaks the degeneracy between CP effects and the matter effects.

They expect to collect of the order of 1000 electron-neutrino events in 7 years of running in neutrino and antineutrino mode. A simultaneous fit to four different neutrino flavour samples should allow precise measurements of the parameters.

Other interesting measurements will be on neutron-antineutron oscillations, and study of neutrinos from stellar core collapse.

 

 

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