Introduction

Large sub-millimeter direct detection mapping projects like the AtlasGal survey can only be performed with a good telescope at an excellent side and a large, sensitive camera working close to the background noise. The APEX telescope with its current instrumentation offers already the capability for such large surveys. But new technologies now make possible cameras with an even larger field-of-view, much larger pixel counts and therefore much higher mapping Atlasgal / APEXspeeds.

A-MKID is a camera based on latest available technologies. It operates two frequency bands simulta­neously, in the atmospheric windows around 850µm and 350µm, and offers in total about 25000 pixels to the user.

The camera uses so-called microwave kinetic inductance detectors (MKIDs) as sensing elements. Their design allows for efficient frequency multiplexing and therefore high pixel counts for the overall camera system. At the same time the detectors show highest sensitivity and their production on large wavers with high yield has been demonstrated.

The camera design has been completed, integration of the cryostat is currently on-going and commis­sioning at the APEX is foreseen for autumn this year.