Purity monitor and TPC design for Xenoscope

The Xenoscope detector has the main goal of achieving electron drift over a 2.6 m distance, which is scale future multi-ton dual-phase liquid xenon (LXe) TPCs for dark matter and rare event searches. DARWIN experiment aims to have 40 tons LXe as its active volume, reaching neutrino floor background. will serve facility photosensors technologies testing, in order develop next generation detectors. Metre-scale lengths require precise monitoring purity. In this context, we designed an integrated purity monitor TPC, with fabrication former nearly complete. We characterised electronics charge readout, well different photocathode materials optimise yield thus increase precision measurement.