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Title	Development of a PbWO$_4$ Detector for Single-Shot Positron Annihilation Lifetime Spectroscopy at the GBAR Experiment
Author(s)	Kim, B H (Seoul Natl. U.) ; Choi, J J (Seoul Natl. U.) ; Chung, M (UNIST, Ulsan) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (IRFU, Saclay) ; Crivelli, P (Zurich, ETH) ; Crépin, P-P (Paris, Lab. Kastler Brossel) ; Dalkarov, O (Lebedev Inst.) ; Debu, P (IRFU, Saclay) ; Dodd, L (Swansea U.) ; Douillet, A (Paris, Lab. Kastler Brossel ; U. Evry) ; Froehlich, P (Stockholm U.) ; Guellati, S (Paris, Lab. Kastler Brossel) ; Heinrich, J (Paris, Lab. Kastler Brossel) ; Hervieux, P A (IPCMS, Strasbourg) ; Hilico, L (Paris, Lab. Kastler Brossel ; U. Evry) ; Husson, A (CSNSM, Orsay) ; Indelicato, P (Paris, Lab. Kastler Brossel) ; Janka, G (Zurich, ETH) ; Jonsell, S (Stockholm U.) ; Karr, J P (Paris, Lab. Kastler Brossel ; U. Evry) ; Kim, E S (Sejong U.) ; Kim, S K (Seoul Natl. U.) ; Ko, Y (IBS, Daejeon) ; Kosinski, T (NCBJ, Swierk) ; Kuroda, N (Tokyo U.) ; Latacz, B (IRFU, Saclay) ; Lee, H (Seoul Natl. U.) ; Lee, J (IBS, Daejeon) ; Leite, A M M (IRFU, Saclay) ; Lim, E (Sejong U.) ; Liszkay, L (IRFU, Saclay) ; Louvradoux, T (Paris, Lab. Kastler Brossel) ; Lunney, D (CSNSM, Orsay) ; Lévêque, K (IPCMS, Strasbourg) ; Manfredi, G (IPCMS, Strasbourg) ; Mansoulié, B (IRFU, Saclay) ; Matusiak, M (NCBJ, Swierk) ; Mornacchi, G (CERN) ; Nesvizhevsky, V V (Laue-Langevin Inst.) ; Nez, F (Paris, Lab. Kastler Brossel) ; Niang, S (IRFU, Saclay) ; Nishi, R (Tokyo U.) ; Nourbaksh, S (CERN) ; Lotrus, P (IRFU, Saclay) ; Park, K H (Seoul Natl. U.) ; Paul, N (Paris, Lab. Kastler Brossel) ; Pérez, P (IRFU, Saclay) ; Radics, B (Zurich, ETH) ; Regenfus, C (Zurich, ETH) ; Reynaud, S (Paris, Lab. Kastler Brossel) ; Roussé, J Y (IRFU, Saclay) ; Rubbia, A (Zurich, ETH) ; Rzadkiewicz, J (NCBJ, Swierk) ; Sacquin, Y (IRFU, Saclay) ; Schmidt-Kaler, F (Mainz U., Inst. Phys.) ; Staszczak, M (NCBJ, Swierk) ; Tuchming, B (IRFU, Saclay) ; Vallage, B (IRFU, Saclay) ; van der Werf, D P (Swansea U.) ; Voronin, A (Lebedev Inst.) ; Welker, A (CERN) ; Wolf, S (Mainz U., Inst. Phys.) ; Won, D (Seoul Natl. U.) ; Wronka, S (NCBJ, Swierk) ; Yamazaki, Y (Wako, RIKEN) ; Yoo, K H (UNIST, Ulsan)
Publication	2020
Number of pages	4
In:	Acta Phys. Pol. A 137 (2020) 122-125
In:	15th International Workshop on Slow Positron Beam Techniques and Applications, Prague, Czechia, 2-6 Sep 2019, pp.122-125
DOI	10.12693/APhysPolA.137.122
Subject category	Physics in General ; Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN AD ; GBAR AD-7
Abstract	We have developed a PbWO$_{4}$ (PWO) detector with a large dynamic range to measure the intensity of a positron beam and the absolute density of the ortho-positronium ($\mathrm{o-Ps}$) cloud it creates. A simulation study shows that a setup based on such detectors may be used to determine the angular distribution of the emission and reflection of $\mathrm{o-Ps}$ to reduce part of the uncertainties of the measurement. These will allow to improve the precision in the measurement of the cross-section for the (anti)hydrogen formation by (anti)proton–positronium charge exchange and to optimize the yield of antihydrogen ion which is an essential parameter in the GBAR experiment.
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