DOUBLE PHOTOIONISATION OF HELIUM : THE TDCS AT 80 eV EXCESS ENERGY L. Avaldi2, G. Battera 2, R.Camilloni2, M. Coreno3, M.DeSimone1, K.C. Prince5, G. Turri3, M. Zitnik4 and G. Stefani1 1 INFM Unita' di Roma 3 and Dipartimento di Fisica"E. Amaldi". Univers ita' di Roma Tre, via della Vasca Navale 84, I-00146 Roma 2 CNR Istituto di Metodologie AvanzateInorganiche, Area della Ricerca di Roma ,CP -10, 00016 Monterortondo 3 INFM TASC, Padriciano 99, I-34012 Trieste 4 Jozef Stefan Institute,P.O.B. 3000, SI-1001 Ljubljana, Slovenia 5 Sincrotrone Trieste, I-34012Trieste The differential cross section (TDCS) of the direct doublephotionisation (DPI) of He has been measured up to an excess energy of 80eV above threshold, with equal sharing o fthe kinetic energy between the emitted electrons. The TDCS at 40 and 20eV have been measured as well. The experiments have been performed at the Gas Phase beam line at ELETTRA by a novel multicoincidence spectrometer that measures 20 angular conditions at the same time.