COSINE-100 is a dark matter experiment currently running at the Yangyang Underground Laboratory (Y2L) in South Korea. The first phase of the experiment deployed 106 kg of NaI(Tl) crystals and we have started taking data in Fall 2016, with an aim to unambiguously test DAMA Collaboration’s claim that they have made a direct detection of dark matter with their NaI (Tl) detectors.
Dark Matter Search at the South Pole (DM-Ice)DM-Ice is searching for dark matter in the southern hemisphere. The goal is to perform a search for dark matter using the time variation resulting from the motion of the detector relative to the dark matter halo as a signature. Currently we have 17 kg of NaI detector in operation in the South Pole ice just below the IceCube Neutrino Observatory, and 37 kg prototype detectors at the Boulby Underground Laboratory in the UK.
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Haloscope At Yale Sensitive To Axion CDM (HAYSTAC)
Haloscope At Yale Sensitive To Axion CDM (HAYSTAC) is searching for dark-matter axions by their resonant conversion to photons in a high-Q microwave cavity embedded in a strong magnetic fiel.; HAYSTAC is designed to be both a pathfinder for first data in the 4-10 GHz (20-100 microelectronvolt) range, and an innovation test-bed for new concepts with promise to dramatically increase the sensitivity, mass range and scanning rate. Consisting of a 9T superconducting magnet, a dilution refrigerator and a quantum-limited receiver based on Josephson Parametric Amplifiers (JPA), HAYSTAC is projected to achieve sensitivity within the axion model band. HAYSTAC is now being commissioned at Yale. HAYSTAC is a collaboration of Yale, JILA/Colorado, UC Berkeley and LLNL, and by agreement will create a unified data set with HAYSTAC. (click on image to enlarge)
Yale Microwave Cavity Experiment
Several proposed models of the cold dark matter in the universe include light neutral bosons with sub-eV m asses. In many cases their detection hinges on their infrequent interactions with Standard Model photons at sub-eV energies. This effect could manifest as narrow deviations from the broadband thermal noise power at microwave energies (GHz). The Yale Microwave Cavity Experiment is designed to search for abnormalities in the spectrum of 34 GHz noise power associated with a 5 K copper resonant cavity sitting in a 7 T magnetic field. The experiment is sensitive to axion-like particles with couplings to two photons as well as to hidden photons that oscillate with standard model photons by kinetic mixing. (click on image to enlarge)
Search for new Interactions with a Microsphere Precision Levitation Experiment (SIMPLE)
SIMPLE is using optically levitated micron-sized spheres as precision sensors to search for tiny forces that could arise from new physics in a dark sector. Current experiments include sensitive searches for the presence of “millicharged” dark matter particles bound in the spheres or new forces mediated by dark photons. We have also recently performed a search for deviations from the Newtonian inverse square law at distances <100 μm predicted in certain screened scalar dark energy models.