The AEIS experiment (Antimatter Experiment: Gravity, Interferometry, Spectroscopy (Drobychev et al., 2007)), aims at directly measuring the gravitational acceleration g on a beam of cold antihydrogen ( ). After production, the atoms will be driven to fly horizontally with a velocity of a few 100 m/s for a path length of about 1 meter. The small deflection, few tens of m, will be measured using two material gratings coupled to a position-sensitive detector working as a Moiré deflectometer similarly to what has been done with atoms (Oberthaler et al., Phys Rev A 54:3165, 1996). Details about the detection of the annihilation point at the end of the flight path with a position-sensitive microstrip detector and a silicon tracker system will be discussed.
Measuring the antihydrogen fall / G. Bonomi, A. S. Belov, I. Boscolo, N. Brambilla, R. S. Brusa, V. M. Byakov, L. Cabaret, C. Canali, C. Carraro, F. Castelli, S. Cialdi, M. de Combarieu, D. Comparat, G. Consolati, N. Djourelov, M. Doser, G. Drobychev, A. Dupasquier, D. Fabris, R. Ferragut, G. Ferrari, A. Fischer, A. Fontana, P. Forget, L. Formaro, M. G. Giammarchi, M. Lunardon, A. Gervasini, S. N. Gninenko, G. Gribakin, R. Heyne, A. Kellerbauer, D. Krasnicky, V. Lagomarsino, G. Manuzio, S. Mariazzi, V. A. Matveev, S. Moretto, C. Morhard, G. Nebbia, P. Nedelec, M. K. Oberthaler, P. Pari, V. Petracek, M. Prevedelli, I. Y. Al-Qaradawi, F. Quasso, O. Rohne, S. Pesente, A. Rotondi, S. Stapnes, D. Sillou, S. V. Stepanov, H. H. Stroke, G. Testera, G. M. Tino, A. Vairo, G. Viesti, F. Villa, H. Walters, U. Warring, S. Zavatarelli, A. Zenoni, D. S. Zvezhinskij. - In: HYPERFINE INTERACTIONS. - ISSN 0304-3843. - 193:1-3(2009 Sep), pp. 297-303.
Measuring the antihydrogen fall
I. Boscolo;F. Castelli;S. Cialdi;M. G. Giammarchi;A. Gervasini;F. Villa;
2009
Abstract
The AEIS experiment (Antimatter Experiment: Gravity, Interferometry, Spectroscopy (Drobychev et al., 2007)), aims at directly measuring the gravitational acceleration g on a beam of cold antihydrogen ( ). After production, the atoms will be driven to fly horizontally with a velocity of a few 100 m/s for a path length of about 1 meter. The small deflection, few tens of m, will be measured using two material gratings coupled to a position-sensitive detector working as a Moiré deflectometer similarly to what has been done with atoms (Oberthaler et al., Phys Rev A 54:3165, 1996). Details about the detection of the annihilation point at the end of the flight path with a position-sensitive microstrip detector and a silicon tracker system will be discussed.
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