학술논문
Real-time antiproton annihilation vertexing with sub-micron resolution
Document Type
Working Paper
Author
Berghold, M.; Orsucci, D.; Guatieri, F.; Alfaro, S.; Auzins, M.; Bergmann, B.; Burian, P.; Brusa, R. S.; Camper, A.; Caravita, R.; Castelli, F.; Cerchiari, G.; Ciuryło, R.; Chehaimi, A.; Consolati, G.; Doser, M.; Eliaszuk, K.; Ferguson, R.; Germann, M.; Giszczak, A.; Glöggler, L. T.; Graczykowski, Ł.; Grosbart, M.; Gusakova, N.; Gustafsson, F.; Haider, S.; Huck, S.; Hugenschmidt, C.; Janik, M. A.; Januszek, T.; Kasprowicz, G.; Kempny, K.; Khatri, G.; Kłosowski, Ł.; Kornakov, G.; Krumins, V.; Lappo, L.; Linek, A.; Mariazzi, S.; Moskal, P.; Nowicka, D.; Pandey, P.; Pęcak, D.; Penasa, L.; Petracek, V.; Piwiński, M.; Pospisil, S.; Povolo, L.; Prelz, F.; Rangwala, S. A.; Rauschendorfer, T.; Rawat, B. S.; Rienäcker, B.; Rodin, V.; Røhne, O. M.; Sandaker, H.; Sharma, S.; Smolyanskiy, P.; Sowiński, T.; Tefelski, D.; Vafeiadis, T.; Volponi, M.; Welsch, C. P.; Zawada, M.; Zielinski, J.; Zurlo, N.
Source
Subject
Language
Abstract
The primary goal of the AEgIS experiment is to precisely measure the free fall of antihydrogen within Earth's gravitational field. To this end, a cold ~50K antihydrogen beam has to pass through two grids forming a moir\'e deflectometer before annihilating onto a position-sensitive detector, which shall determine the vertical position of the annihilation vertex relative to the grids with micrometric accuracy. Here we introduce a vertexing detector based on a modified mobile camera sensor and experimentally demonstrate that it can measure the position of antiproton annihilations with an accuracy of $0.62^{+0.40}_{-0.22}\mu m$, which represents a 35-fold improvement over the previous state-of-the-art for real-time antiproton vertexing. Importantly, these antiproton detection methods are directly applicable to antihydrogen. Moreover, the sensitivity to light of the sensor enables the in-situ calibration of the moir\'e deflectometer, significantly reducing systematic errors. This sensor emerges as a breakthrough technology for achieving the \aegis scientific goals and has been selected as the basis for the development of a large-area detector for conducting antihydrogen gravity measurements.
Comment: 21 pages, 4 figures, 2 tables
Comment: 21 pages, 4 figures, 2 tables