Description and commissioning of NEXT-MM prototype: first results from operation in a Xenon-Trimethylamine gas mixture

Álvarez Puerta, Vicente
Aznar, F.
Borges, Filipa I.G.M.
Calvet, D.
Cárcel García, Sara
Castel, J.
Cebrián, Susana
Cervera Villanueva, Anselmo
Conde, Carlos A.N
Dafni, Theopisti
Dias, T.H.V.T
Díaz Medina, José
Druillole, F.
Egorov, M.
Freitas, Elisabete D.C.
Gehman, Victor M.
Gil Ortiz, Alejandro
Giomataris, I.
Goldschmidt, Azriel
Gómez, H.
Gómez Cadenas, Juan
González-Díaz, Diego
Gutiérrez, Rafael María
Hauptman, John M.
Hernando Morata, J.A.
Herrera, D.C.
Iguaz, F.J.
Irastorza, Igor Garcia
Jinete, M.A.
Labarga, Luis A.
Laing, Andrew
Le Coguie, A.
Liubarsky, Igor
Lopes, J.A.M.
Lorca Galindo, David
Losada, Marta
Luzón, Gloria
Marí, A.
Martín-Albo Simón, Justo
Martínez Pérez, Alberto
Martínez Lema, Gonzalo
Miller, Tom P.
Moiseenko, A.
Mols, J.P.
Monrabal Capilla, Francesc
Monteiro, Cristina M.B.
Mora, Francisco José
Moutinho, L.M.
Muñoz Vidal, J.
Natal da Luz, H.
Navarro, G.
Nebot Guinot, Miquel
Nygren, David R.
Oliveira, Carlos A.B.
Palma, R.
Pérez, Javier Martin
Pérez Aparicio, J.L.
Renner, Joshua
Rodríguez, Ángel Y.
Santos, Filomena P.
dos Santos, Joaquim M.F.
Seguí, Laura
Serra Díaz-Cano, Luis
Shuman, Derek B.
Simón Estévez, Ander
Sofka, C.
Sorel, Michel
Toledo, J.F.
Tomás, A.
Torrent Collell, Jordi
Tsamalaidze, Zviadi
Veloso, João F.C.A.
Villar, José Ángel
Webb, R.C.
White, James T.
Yahlali Haddou, Nadia
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A technical description of NEXT-MM and its commissioning and first performance is reported. Having an active volume of ~ 35 cm drift × 28 cm diameter, it constitutes the largest Micromegas-read TPC operated in Xenon ever constructed, made by a sectorial arrangement of the 4 largest single wafers manufactured with the Microbulk technique to date. It is equipped with a suitably pixelized readout and with a sufficiently large sensitive volume ( ~ 23 l) so as to contain long ( ~ 20 cm) electron tracks. First results obtained at 1 bar for Xenon and Trymethylamine (Xe-(2%)TMA) mixture are presented. The TPC can accurately reconstruct extended background tracks. An encouraging full-width half-maximum of 11.6 % was obtained for ~ 29 keV gammas without resorting to any data post-processing ​
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