The SBC Dark Matter Experiment and Calibration Plan

The Scintillating Bubble Chamber (SBC) collaboration is constructing two 10 kg LAr bubble chambers for the direct detection of GeV-scale dark matter and coherent elastic neutrino-nucleus scattering (CEvNS). Calibration of the chamber will occur at Fermilab with the SBC-LAr10 detector, where detector performance and recoil sensitivity will be assessed with a campaign of nuclear recoil sources. The low-background dark matter search will take place at SNOLAB, with a second functionally identical chamber, SBC-SNOLAB. Scintillating bubble chambers combine the electron-recoil insensitivity of bubble chambers with scintillation discrimination and have the ability to achieve low nuclear recoil thresholds. With a target nuclear recoil threshold of 100 eV, SBC aims to probe unexplored WIMP dark matter parameter space, with sensitivity to a dark matter-nucleon cross section of 2×10^-42 cm² at 1 GeV/c². With potential for neutrino detection via the CEvNS channel, future plans may consist of deploying a bubble chamber at a reactor site. An overview of the SBC experiment will be given, with a focus on SBC-LAr10 calibration plans. Calibration sources include Thomson scattering gammas, thermal neutron capture, and photoneutrons. Source specifications will be outlined along with their designs. Efforts in simulations and calibration fitting methodology will be summarized.