Method of Search for Hidden Photons of Cold Dark Matter Using a Multi-Cathode Counter

Abstract

We propose a method of search for cold dark matter, which presumably consists of hidden photons, by detecting single electrons emitted from the surface of the metal cathode of a counter as a result of the conversion of hidden photons. To detect single electrons, a special multi-cathode counter has been designed. The counter allows one to discriminate the background by subtracting from the effect the dark count rate measured in a configuration with a blocking potential that prevents the drift of the cathode-emitted electrons to the central counter. The measurement results are presented and significant progress in the development of the methodology is demonstrated. Further steps to improve the method are discussed.