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Title	Detection of low energy antiproton annihilations in a segmented silicon detector
Author(s)	Aghion, S (Milan Polytechnic ; INFN, Milan) ; Ahlen, O (CERN) ; Belov, A S (Moscow, INR) ; Bonomi, G (INFM, Brescia ; INFN, Pavia) ; Bräunig, P (Kirchhoff Inst. Phys.) ; Bremer, J (CERN) ; Brusa, R S (INFN, Trento ; Trento U.) ; Burghart, G (CERN) ; Cabaret, L (Paris, Lab. Kastler Brossel) ; Caccia, M (Insubria U., Como) ; Canali, C (Zurich U.) ; Caravita, R (Milan U.) ; Castelli, F (Milan U.) ; Cerchiari, G (Heidelberg, Max Planck Inst.) ; Cialdi, S (Milan U.) ; Comparat, D (Paris, Lab. Kastler Brossel) ; Consolati, G (Milan Polytechnic ; INFN, Milan) ; Derking, J H (CERN) ; Domizio, S Di (INFN, Genoa) ; Noto, L Di (INFN, Trento ; Trento U.) ; Doser, M (CERN) ; Dudarev, A (CERN) ; Ferragut, R (Milan Polytechnic ; INFN, Milan) ; Fontana, A (INFN, Pavia) ; Genova, P (INFN, Pavia) ; Giammarchi, M (INFN, Milan) ; Gligorova, A (Bergen U.) ; Gninenko, S N (Moscow, INR) ; Haider, S (CERN) ; Harasimowicz, J (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Huse, T (Oslo U.) ; Jordan, E (Heidelberg, Max Planck Inst.) ; Jørgensen, L V (CERN) ; Kaltenbacher, T (CERN) ; Kellerbauer, A (Heidelberg, Max Planck Inst.) ; Knecht, A (CERN) ; Krasnicky, D (Genoa U.) ; Lagomarsino, V (Genoa U.) ; Magnani, A (INFN, Pavia ; Pavia U.) ; Mariazzi, S (Stefan Meyer Inst. Subatomare Phys.) ; Matveev, V A (Moscow, INR ; Dubna, JINR) ; Moia, F (Milan Polytechnic ; INFN, Milan) ; Nebbia, G (INFN, Padua) ; Nedelec, P (Lyon, IPN) ; Pacifico, N (Bergen U.) ; Petracek, V (Prague, Tech. U.) ; Prelz, F (INFN, Milan) ; Prevedelli, M (Bologna U.) ; Regenfus, C (Zurich U.) ; Riccardi, C (Pavia U. ; INFN, Pavia) ; R\Ohne, O (Oslo U.) ; Rotondi, A (Pavia U. ; INFN, Pavia) ; Sandaker, H (Bergen U.) ; Sosa, A (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Vasquez, M A Subieta (INFM, Brescia ; INFN, Pavia) ; Spacek, M (Prague, Tech. U.) ; Testera, G (INFN, Genoa) ; Welsch, C P (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Zavatarelli, S (INFN, Genoa)
Publication	2014
In:	JINST 9 (2014) P06020
DOI	10.1088/1748-0221/9/06/P06020
Subject category	Detectors and Experimental Techniques
Abstract	The goal of the AEbar gIS experiment at the Antiproton Decelerator (AD) at CERN, is to measure directly the Earth's gravitational acceleration on antimatter by measuring the free fall of a pulsed, cold antihydrogen beam. The final position of the falling antihydrogen will be detected by a position sensitive detector. This detector will consist of an active silicon part, where the annihilations take place, followed by an emulsion part. Together, they allow to achieve 1% precision on the measurement of bar g with about 600 reconstructed and time tagged annihilations. We present here the prospects for the development of the AEbar gIS silicon position sentive detector and the results from the first beam tests on a monolithic silicon pixel sensor, along with a comparison to Monte Carlo simulations.
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