# Search for Hidden Photon Dark Matter Using a Multi-Cathode Counter

## TL;DR

This paper reports a novel experimental search for hidden-photon dark matter using a multi-cathode counter that detects single electrons emitted by hidden-photons, setting new upper limits on their mixing parameter.

## Contribution

It introduces a new detection technique using a multi-cathode counter for hidden-photon dark matter and provides initial experimental limits on the photon-HP mixing parameter.

## Key findings

- Set an upper limit on the photon-HP mixing parameter .
- Demonstrated sensitivity in the Vacuum Ultraviolet energy range.
- Proposed further development of the multi-cathode detection method.

## Abstract

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.

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Source: https://tomesphere.com/paper/1812.03658