Xenon double phase TPCs have shown the best sensitivities for dark matter direct searches over a large parameter space.
However difficulties in the construction large scale TPC have already arisen in the current detectors and will be even more challenging
in the next generation one. Of critical importance are the construction of meter scale electrodes with negligible sagging and high optical transparency
but also the control of instrumental background such as single electron emission. Xelab is a system equipped with a small double phase xenon TPC
cooled with liquid nitrogen and a xenon recuperation module primarily designed for the test of innovative concept of floating electrodes
but will also serve as a platform for instrumental development for xenon based TPC.
We present the design and realisation of XeLab and the baseline of electrodes that we plan to test.