The Liquid Xenon Gamma - Ray Imaging Telescope (LXeGRIT) is a balloon - borne experiment which uses
a liquid xenon time projection chamber (LXeTPC) to image gamma - ray emission from cosmic sources in the 0.15 -10 MeV energy band.
The XENON1T central detector, a so - called
Liquid Xenon Time Projection Chamber (LXeTPC), is not visible.
To shield the detector as much as possible from natural radioactivity in the cavern, the detector (a so - called
Liquid Xenon Time Projection Chamber) sits within a cryostat submersed in a tank of water.