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CoGeNT Dark Matter Experiment

CoGeNT Dark Matter Experiment

The CoGeNT Dark Matter Experiment is a direct search for signals from interactions of dark matter particles in a low-background germanium detector located at Soudan Underground Laboratory in Soudan, MN.

ionization energy (KeVee)
Low energy spectrum from the CoGeNT experiment
Enlarged View

The CoGeNT Experiment uses a single, 440-gram, high-purity germanium crystal cooled to liquid nitrogen temperatures in its measurements. The CoGeNT detector has an advantage of an very low energy threshold (~0.5 keV) which allows it to search for nuclear recoil events due to dark matter particles of relatively low mass (> 5 GeV/c^2). In addition to a low-background configuration, the detector is capable of distinguishing and rejecting background events from the surface through measurement of the risetime of the detector's signals. The CoGeNT detector senses only ionization charge from nuclear recoils and places limits on the mass and interaction cross-section of dark matter particles by excluding any candidate mass and cross-section pair that would result in a signal above the background of the detector.

The CoGeNT detector began collecting data at the Soudan Underground Laboratory for dark matter searches in December 2009. The References section on this website provides links to the detailed scientific reports prepared by the CoGeNT Collaboration.

The CoGeNT detector continues to take data at Soudan and a next generation of the CoGeNT experiment intended to deploy four, larger mass detectors is under way.

Permission to use the banner background image provided by Virgo Consortium and the maker of these materials Prof. Volker Springel.

CoGeNT Dark Matter Experiment

Science Contacts

Juan I. Collar, University of Chicago