Improved RPC for CMS muon system upgrade for HL-LHC

During the Phase-2 of the LHC, known as the High Luminosity LHC (HL-LHC), the accelerator will increase its instantaneous luminosity to 5 $\times$ 10$^{34}$ cm$^{-2}$ s$^{-1}$, delivering an integrated luminosity of 3000~fb$^{-1}$ over 10 years of operation starting from 2027. In view of the HL-LHC,...

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Detalles Bibliográficos
Autores principales: Kumari, Priyanka, Gelmi, A., Shchablo, K., Samalan, A., Tytgat, M., Zaganidis, N., Alves, G.A., Marujo, F., Torres da Silva de Araujo, F., Da Costa, E.M., De Jesus Damiao, D., Nogima, H., Santoro, A., Fonseca De Souza, S., Aleksandrov, A., Hadjiiska, R., Iaydjiev, P., Rodozov, M., Shopova, M., Soultanov, G., Bonchev, M., Dimitrov, A., Litov, L., Pavlov, B., Petkov, P., Petrov, A., Qian, S.J., Cao, P., Kou, H., Liu, Z., Song, J., Zhao, J., Bernal, C., Cabrera, A., Fraga, J., Sarkar, A., Elsayed, S., Assran, Y., El Sawy, M., Mahmoud, M.A., Mohammed, Y., Chen, X., Combaret, C., Gouzevitch, M., Grenier, G., Laktineh, I., Mirabito, L., Bagaturia, I., Lomidze, D., Lomidze, I., Bhatnagar, V., Gupta, R., Kumari, P., Singh, J., Amoozegar, V., Boghrati, B., Ebraimi, M., Ghasemi, R., Mohammadi Najafabadi, M., Zareian, E., Abbrescia, M., Aly, R., Elmetenawee, W., De Filippis, N., Iaselli, G., Leszki, S., Loddo, F., Margjeka, I., Pugliese, G., Ramos, D., Benussi, L., Bianco, S., Piccolo, D., Buontempo, S., Di Crescenzo, A., Fienga, F., De Lellis, G., Lista, L., Meola, S., Paolucci, P., Braghieri, A., Salvini, P., Montagna, P., Riccardi, C., Vitulo, P., Francois, B., Kim, T.J., Park, J., Choi, S.Y., Hong, B., Lee, K.S., Goh, J., Lee, H., Eysermans, J., Estrada, C. Uribe, Pedraza, I., Castilla-Valdez, H., Sanchez-Hernandez, A., Mondragon Herrera, C.A., Perez Navarro, D.A., Sanchez, G.A. Ayala, Carrillo, S., Vazquez, E., Radi, A., Ahmad, A., Asghar, I., Hoorani, H., Muhammad, S., Shah, M.A., Crotty, I.
Lenguaje:eng
Publicado: 2020
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1088/1748-0221/15/11/C11012
http://cds.cern.ch/record/2792678
Descripción
Sumario:During the Phase-2 of the LHC, known as the High Luminosity LHC (HL-LHC), the accelerator will increase its instantaneous luminosity to 5 $\times$ 10$^{34}$ cm$^{-2}$ s$^{-1}$, delivering an integrated luminosity of 3000~fb$^{-1}$ over 10 years of operation starting from 2027. In view of the HL-LHC, the CMS muon system will be upgraded to sustain efficient muon triggering and reconstruction performance. Resistive Plate Chambers (RPCs) serve as dedicated detectors for muon triggering due to their excellent timing resolution, and will extend $\eta$ (pseudorapidity) up to a region of 2.4. Before Long Shutdown 3 (LS3), the RE3/1 and RE4/1 stations of the endcap will be equipped with new improved Resistive Plate Chambers (iRPCs) having different design and geometry than the present RPC system. The iRPC geometry configuration improves the detector's rate capability and its ability to survive the harsh background conditions of the HL-LHC. Also, new electronics equipped with excellent timing precision measurement with a resolution of $<$ 150 ps are developed to read out the RPC detectors from both sides of the strips to allow for good spatial resolution along them. The performance of the iRPC has been studied with gamma radiation at the Gamma Irradiation Facility (GIF++) at CERN. Ongoing longevity studies will help to certify the iRPCs for the HL-LHC running period. The main detector parameters such as the currents, rate and resistivity are regularly monitored as a function of the integrated charge. Preliminary results of the detector performance will be presented.

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