Conditions Extrêmes et Matériaux : Haute Température et Irradiation
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2008

ACLN

P.Perez, L.Liszkay, M.F.Barthe, J.P.Boilot, M.Carry, C.Corbel,P.Crivelli, A.Curtoni, O.Delferrierre, P.Desgardin, M.Etienne, U.Gendotti, M.Hassan, A.Mohri, T.Ohdaira, J.M.Rey, A.Rubbia, H.Saitoh, Y.Sauce, R.Suzuki, A.Walcarius, Y.Yamazaki, 'Scheme to produce the antihydrogen ion H+ for gravity measurements', American Institute of Physics 1037 35-42 (2008)

We propose to use the charge exchange reaction of antiprotons with positronium atoms in order to produce antihydrogen atoms, H , and H+ ions. The ions can be cooled down to mu K temperatures and then ionized to recover an ultra slow neutral H atom. Its acceleration is then measured by time of flight. Results on the conversion of slow positrons into positronium are presented. This is a first step towards the creation of a dense cloud of positronium atoms to be used as a target for the antiprotons. The source of positrons is based on a 6 MeV industrial electron linac with 0.2 mA average current to be installed in CEA-Saclay. Equipped with a tungsten target and a moderator, it is aimed at producing rates of order 10/sup 8/ s/sup -1/ slow positrons.