Progress With the Double Chooz Time Projection Chamber (DCTPC) Neutron Detector

DCTPC detects fast neutron events at the Double Chooz reactor-basedneutrino oscillation experiment in France. Understanding neutronbackground as a function of energy and depth is relevant for multiple experiments around the world, including those trying to measure dark matter, low energy neutrino, and neutrinoless double beta decay. DCTPC allows us to produce a three dimensional image of a neutron-inducednuclear recoil with calorimetric and directional information. I will discuss how DCTPC works, why DCTPC is useful, and moving DCTPC to Fermilab this summer. I will also present results from the DCTPC Double Chooz near and far hall physics runs.