HIGH-PRESSURE XE+CF4 TPC IN A LOW RADIOACTIVITY ACRYLIC STRUCTURE

A prototype time projection chamber, constructed in acrylic in order t o be used as a low radioactivity, low energy detector, is described. A similar detector, of larger size, can be used in an experiment to sea rch for rare events such as neutrinoless double beta decay. The behavi our of the chamber, filled with 280 g of Xe + CF4 (5 %) at 5 bar, is d iscussed together with the results obtained on the electron drift leng th and on the energy resolution. The measurements on the scintillation light of the gas are also presented.