Development of a PbWO$_4$ Detector for Single-Shot Positron Annihilation Lifetime Spectroscopy at the GBAR Experiment

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 angula...

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Detalles Bibliográficos
Autores principales: Kim, B H, Choi, J J, Chung, M, Cladé, P, Comini, P, Crivelli, P, Crépin, 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, S, 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, Lévêque, K, Manfredi, G, Mansoulié, B, Matusiak, M, Mornacchi, G, Nesvizhevsky, V V, Nez, F, Niang, S, Nishi, R, Nourbaksh, S, Lotrus, P, Park, K H, Paul, N, Pérez, P, Radics, B, Regenfus, C, Reynaud, S, Roussé, J Y, Rubbia, A, Rzadkiewicz, J, Sacquin, Y, Schmidt-Kaler, F, Staszczak, M, Tuchming, B, Vallage, B, van der Werf, D P, Voronin, A, Welker, A, Wolf, S, Won, D, Wronka, S, Yamazaki, Y, Yoo, K H
Lenguaje:eng
Publicado: 2020
Materias:
Physics in General
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.12693/APhysPolA.137.122
http://cds.cern.ch/record/2745862
Descripción
Sumario: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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