The Study of a Temperature Dependence of the Dark Rate of Single   Electrons Emitted from a Cathode of a Multi-Cathode Counter as a Method to   Search for Hidden Photons of CDM
  The dark rate of single electrons emitted from a metal cathode of the counter depends upon a temperature. At cryogenic temperatures the dark rate measured with bi-alkaline cathodes of PMT has been found to increase by lowering the temperature of the detector. One of the possible interpretations of this effect suggests the energy trapping mechanism from the conversion of Hidden Photons of CDM at the surface of a photocathode. The measurements are planned by using a Multi-Cathode Counter (MCC) with a copper and aluminum cathodes of 0.2 m2 at temperatures from 300 K down to 220 K to spot the increase of cryogenic dark rate from Hidden Photons of CDM. The physical motivation and the description of the experiment are presented. 
A.V.Kopylov, I.V.Orekhov and V.V.Petukhov
physics.ins-det hep-ex