Study of Thin Double-Gap RPCs for the CMS Muon System

Lee, K. S.; Cho, S. W.; Choi, S.; Hong, B.; Kang, M.; Lim, J. H.; Y. M., Jo; Park, S. K.; Ryoo, K. R.; Aly, R.; Aly, S.; Assran, Y.; Mohamed, A.; Mahrous, A.; Constantini, S.; Abbrescia, M.; Gelmi, A.; Maggi, M.; Iaselli, G.; Pugliese, G.; Sharma, A.; Bhatnagar, V.; Gupta, R.; Kumari, P.; Manisha, M.; Singh, J.; Benussi, L.; Bianc, S.; Piccolo, D.; Primavera, F.; Fagot, A.; Gul, M.; Roskas, C.; Tytgat, M.; Zagandis, N.; Pant, L.; Buontempo, S.; Buonaura, A.; Di Crescenzo, A.; Fienga, F.; Galati, G.; Lista, L.; Meola, S.; Orso, A.; Paolucci, P.; Voevodina, E.; Hoorani, H.; Muhammad, S.; Shah, M.; Braghieri, A.; Montagna, P.; Riccardi, C.; Salvini, P.; Vitulo, P.; Ban, Y.; Qian, S.; Aleksandrov, A.; Hadjiiska, R.; Iaydjiev, P.; Rodozov, M.; Soultanov, G.; Vutiva, M.; Dimitrov, A.; Litov, L.; Petkov, P.; Dimitrov, A.; Pavlov, B.; Han, D.; Wang, Y.; Bernal, C.; Montoya, C. C.; Mora, A. C.; Gouzevitch, M.; Grenier, G.; Lagarde, F.; Laktineh, I.; Estrada, C. U.; Eysermans, J.; Pedraza, I.; Bagaturia, I.; Lomidze, D.; Lomidze, I.; Tsamalaidze, Z.; Toriashvili, T.; Moreno, S. C.; Valencia, F. V.; Goh, J.; Jeong, S.; Kim, T.; Yu, I.; Hwang, C.; Mohammadi, M.; Najafabadi,; Boghrati, B.; Castilla-Valdez, H.; Sanchez-Hernandez, A.; Crotty, I.

doi:10.3938/jkps.73.1080

High-sensitivity double-gap phenolic resistive plate chambers (RPCs) are studied for the Phase-2 upgrade of the Compact Muon Solenoid (CMS) muon system at high pseudorapidity η. Whereas the present CMS RPCs have a gas gap thickness of 2 mm, we propose to use thinner gas gaps, which will improve the performance of these RPCs. To validate this proposal, we constructed double-gap RPCs with two different gap thicknesses of 1.2 and 1.4 mm by using high-pressure laminated plates having a mean resistivity of about 5 ×1010 Ω-cm. This paper presents test results using cosmic muons and 137Cs gamma rays. The rate capabilities of these thin-gap RPCs measured with the gamma source exceed the maximum rate expected in the new high-ηendcap RPCs planned for future Phase-2 runs of the Large Hadron Collider (LHC).

Study of Thin Double-Gap RPCs for the CMS Muon System / Lee, K. S.; Cho, S. W.; Choi, S.; Hong, B.; Kang, M.; Lim, J. H.; Jo, Y. M.; Park, S. K.; Ryoo, K. R.; Aly, R.; Aly, S.; Assran, Y.; Mohamed, A.; Mahrous, A.; Constantini, S.; Abbrescia, M.; Gelmi, A.; Maggi, M.; Iaselli, G.; Pugliese, G.; Sharma, A.; Bhatnagar, V.; Gupta, R.; Kumari, P.; Manisha, M.; Singh, J.; Benussi, L.; Bianc, S.; Piccolo, D.; Primavera, F.; Fagot, A.; Gul, M.; Roskas, C.; Tytgat, M.; Zagandis, N.; Pant, L.; Buontempo, S.; Buonaura, A.; Di Crescenzo, A.; Fienga, F.; Galati, G.; Lista, L.; Meola, S.; Orso, A.; Paolucci, P.; Voevodina, E.; Hoorani, H.; Muhammad, S.; Shah, M.; Braghieri, A.; Montagna, P.; Riccardi, C.; Salvini, P.; Vitulo, P.; Ban, Y.; Qian, S.; Aleksandrov, A.; Hadjiiska, R.; Iaydjiev, P.; Rodozov, M.; Soultanov, G.; Vutiva, M.; Dimitrov, A.; Litov, L.; Petkov, P.; Dimitrov, A.; Pavlov, B.; Han, D.; Wang, Y.; Bernal, C.; Montoya, C. C.; Mora, A. C.; Gouzevitch, M.; Grenier, G.; Lagarde, F.; Laktineh, I.; Estrada, C. U.; Eysermans, J.; Pedraza, I.; Bagaturia, I.; Lomidze, D.; Lomidze, I.; Tsamalaidze, Z.; Toriashvili, T.; Moreno, S. C.; Valencia, F. V.; Goh, J.; Jeong, S.; Kim, T.; Yu, I.; Hwang, C.; Mohammadi, M.; Najafabadi, ; Boghrati, B.; Castilla-Valdez, H.; Sanchez-Hernandez, A.; Crotty, I.. - In: JOURNAL OF THE KOREAN PHYSICAL SOCIETY. - ISSN 0374-4884. - 73:8(2018). [10.3938/jkps.73.1080]