  A search for hidden-photon (HP) dark matter using a multi-cathode counter is
reported. The technique based on counting of single electrons emitted from
outer cathode of the proportional counter by hidden-photons was used. The
apparatus and the calibration of the counter by ultraviolet lamp are described.
It is shown that this technique attains a maximum sensitivity in the energy
range of Vacuum Ultraviolet. From the results of measurements we set an upper
limit on the photon-HP mixing parameter \chi. A further progress of using a
multi-cathode technique is discussed.
