The C-4 Dark Matter Experiment
  We describe the experimental design of C-4, an expansion of the CoGeNT dark
matter search to four identical detectors each approximately three times the
mass of the p-type point contact germanium diode presently taking data at the
Soudan Underground Laboratory. Expected reductions of radioactive backgrounds
and energy threshold are discussed, including an estimate of the additional
sensitivity to low-mass dark matter candidates to be obtained with this search.
