Development of a PbWO4 Detector for Single-Shot Positron Annihilation Lifetime Spectroscopy at the GBAR Experiment

We have developed a PbWO4 (PWO) detector with a large dynamic range to measure the intensity of a positron beam and the absolute density of the ortho-positronium (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 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.

By the author/editor: Kim, B. H.; Choi, J. J.; Chung, M.; Clade, P.; Comini, P.; Crivelli, P.; show more...; Crepin, P.-P.; Dalkarov, O.; Debu, P.; Dodd, L.; Douillet, A.; Froehlich, P.; Guellati, S.; Heinrich, J.; Hervieux, P.-A.; Hilico, L.; Husson, A.; Indelicato, P.; Janka, G.; Jonsell, Svante; Karr, J.-P.; Kim, E.-S.; Kim, S. K.; Ko, Y.; Kosinski, T.; Kuroda, N.; Latacz, B.; Lee, H.; Lee, J.; Leite, A. M. M.; Lim, E.; Liszkay, L.; Louvradoux, T.; Lunney, D.; Leveque, K.; Manfredi, G.; Mansoulie, B.; Matusiak, M.; Mornacchi, G.; Nesvizhevsky, V. ...; Nez, F.; Niang, S.; Nishi, R.; Nourbaksh, S.; Lotrus, P.; Park, K. H.; Paul, N.; Perez, P.; Radics, B.; Regenfus, C.; Reynaud, S.; Rousse, J.-Y.; Rubbia, A.; Rzadkiewicz, J.; Sacquin, Y.; Schmidt-Kaler, F ...; Staszczak, M.; Tuchming, B.; Vallage, B.; van der Werf, D. ...; Voronin, A.; Welker, A.; Wolf, S.; Won, D.; Wronka, S.; Yamazaki, Y.; Yoo, K.-H.; show less...

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