A CF3I-based SDD prototype for spin-independent dark matter searches

Details A CF3I-based SDD prototype for spin-independent dark matter searches A CF3I-based SDD prototype for spin-independent dark matter searches

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aph....30..159s&link_type=abstract

Astroparticle Physics, Volume 30, Issue 3, p. 159-166.

Physics

4

Phase Transitions: General Studies, Radiation Detectors

Scientific paper

The application of superheated droplet detectors (SDDs) to dark matter searches has so far been confined to the light nuclei refrigerants C2ClF5 and C4F10 (SIMPLE and PICASSO, respectively), with a principle sensitivity to spin-dependent interactions. Given the competitive results of these devices, as a result of their intrinsic insensitivity to backgrounds, we have developed a prototype trifluoroiodomethane (CF3I)-loaded SDD with increased sensitivity to spin-independent interactions as well. A low (0.102 kgd) exposure test operation of two high concentration, 1 l devices is described, and the results compared with leading experiments in both spin-dependent and -independent sectors. Although competitive in both sectors when the difference in exposures is accounted for, a problem with fracturing of the detector gel must be addressed before significantly larger exposures can be envisioned.

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