Speaker
Description
The NEWS-G collaboration is searching for light dark matter candidates using a novel gaseous detector concept, the spherical proportional counter. Access to the mass range from 0.05 to 10 GeV is enabled by the combination of low energy threshold, light gaseous targets (H, He, Ne), and highly radio-pure detector construction. Initial NEWS-G results obtained with SEDINE, a 60 cm in diameter spherical proportional counter operating at LSM (France), excluded for the first time WIMP-like dark matter candidates down to masses of 0.5 GeV. First physics results using the commissioning data of a 140 cm in diameter spherical proportional counter, S140, constructed at LSM using 4N copper with 500 um electroplated inner layer will be presented, along with the new developments in read-out sensor technologies using resistive materials and multi-anode read-out that enables its operation. The first physics campaign in SNOLAB (Canada) with the detector was recently completed. To suppress background and so enhance the sensitivity of future detectors, NEWS-G are developing novel electroforming techniques. The potential to achieve sensitivity reaching the neutrino floor in light Dark Matter searches with a next generation detector, DarkSPHERE, will also be presented.
| Collaboration / Activity | NEWS-G |
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