Requiring a barium ion at the location of an event eliminates all backgrounds. Tagging of a single ion of barium has been demonstrated and progress has been made on a method for extracting ions out of the liquid xenon. A freezing probe method has been demonstrated, and gaseous tagging is also being developed.
The presence of a barium ion at the location of an event eliminates background noise. The tagging of a single barium ion has been achieved, and progress is being made on extracting ions from liquid xenon using a freezing probe method. Gaseous tagging is also being developed.