Speaker
Description
The Deep Underground Neutrino Experiment (DUNE) aims to make precise
measurements of the neutrino oscillation parameters. In particular, the measurement of
CPV in neutrinos requires the systematic uncertainty be within few percent level. In
order to highly constrain the flux, cross section and detector systematics, DUNE near
detector is designed to be a robust system including various complementing sub-systems
utilizing different technologies.
The DUNE near detector is considered to be comprised of a liquid argon TPC system,
which employs the same nuclear target as the far detector, a high pressure gaseous argon
system, which can give us opportunity to look closer to the neutrino interaction with
lower detection threshold and charge separation, and a 3D projection scintillator tracker
spectrometer, which provides a different nuclear target to tune the A-dependent nuclear
model as well as neutron detection and beam monitoring in a magnetic field. In addition,
the DUNE near detector system is considered to be movable to a number of off-axis
positions. By doing so, reliance on the neutrino interaction models can be greatly
reduced.
In this talk, the reasoning and design of the DUNE near detector system will be
presented and various beam tests with different sub-systems will be shown.
