3:30–4:45 pm MCP 201
Coherent CAPTAIN-Mills (CCM) experiment is a 10 ton Liquid Argon scintillation detector experiment located at the Los Alamos National Laboratory. The Los Alamos Neutron Science Center provides an 800 MeV proton beam on a tungsten target which is a copious source of neutrinos from stopped pions, as well as, possibly, new particles belonging to the Dark Sector of particle physics with masses in the range of keV to MeV. This Light Dark Matter (LDM) then undergoes elastic scattering off the Ar nuclei and produces scintillation light. In addition, we also look at the newly proposed inelastic scattering off Ar nuclei. The CCM detector is instrumented with photomultiplier tubes (PMTs) to capture the scintillation light. A prototype detector instrumented with 120 PMTs, CCM120 operated in 2019 demonstrating the potential of such a detector for the search of LDM. The upgraded CCM200 detector, with 200 PMTs and improved shielding is now taking beam data. In this talk the status of the experiment, as well as preliminary results from CCM200 with 2E21 POT for elastic and inelastic scattering of dark matter with LAr and expected sensitivity for the full 3-year run with 2.25E22 POT will be presented.