The ARGO-YBJ experiment in Tibet

Aielli a, THE ARGO YBJ COLLABORATION G.; B,; Bacci c, C.; D,; Bartoli e, B.; F,; Bernardini g, P.; H,; Bi i, X. J.; Bleve g, C.; H,; Branchini d, P.; Budano d, A.; Bussino c, S.; D,; Calabrese Melcarne x, A. K.; Camarri a, P.; B,; Cao i, Z.; Cappa j, A.; K,; Cardarelli b, R.; Catalanotti f, S.; E,; Cattaneo l, C.; Celio c, P.; D,; Chen i, S. Z.; Chen i, Y.; Cheng i, N.; Creti h, P.; Cuim, S. W.; Dai o, B. Z.; D’Alí Staiti n, G.; P,; Danzengluobu, Q; Dattoli j, M.; K, R; De Mitri g, I.; H,; D’Ettorre Piazzoli f, B.; E,; De Vincenzi c, M.; D,; Di Girolamo f, T.; E,; Ding q, X. H.; Di Sciascio b, G.; Feng s, C. F.; Zhaoyang Feng, I; Zhenyong Feng, T; Galeazzi d, F.; Galeotti j, P.; R,; Gargana d, R.; Gou i, Q. B.; Guo i, Y. Q.; He i, H. H.; Huq, Haibing; Hui, Hongbo; Huang t, Q.; Iacovacci f, M.; E,; Iuppa a, R.; B,; James c, I.; D,; Jia t, H. Y.; Labaciren, Q; Li q, H. J.; Li s, J. Y.; Li i, X. X.; Liberti b, B.; Liguori l, G.; U,; Liu i, C.; Liu o, C. Q.; Lium, M. Y.; Liu o, J.; Lui, H.; Mai, X. H.; Mancarella g, G.; H,; Mari, Stefano Maria; C, D; Marsella h, G.; V,; Martello g, D.; H,; Mastroianni e, S.; Meng q, X. R.; Montini c, P.; D,; Ning q, C. C.; Pagliaro n, A.; W,; Panareo h, M.; V,; Perrone h, L.; V,; Pistilli c, P.; D,; Qu s, X. B.; Rossi e, E.; Ruggieri d, F.; Saggese f, L.; E,; Salvini l, P.; Santonico a, R.; B,; Shen i, P. R.; Sheng i, X. D.; Shi i, F.; Stanescu d, C.; Surdo h, A.; Tan i, Y. H.; Vallania j, P.; K,; Vernetto j, S.; K,; Vigorito j, C.; R,; Wangi, B.; Wang i, H.; Wui, C. Y.; Wui, H. R.; Xut, B.; Xues, L.; Yanm, Y. X.; Yang o, Q. Y.; Yang o, X. C.; Yuan q, A. F.; Zha i, M.; Zhang i, H. M.; JiLong Zhang, I; JianLi Zhang, I; Zhang o, L.; Zhang o, P.; Zhang s, X. Y.; Zhang i, Y.; Zhaxisangzhu, Q; Zhou t, X. X.; Zhu i, F. R.; Zhu i, Q. Q.; Zizzi g, G.

doi:10.1016/j.nima.2008.01.019

The setting up of the ARGO detector at the YangBaJing Cosmic Ray Laboratory (4300ma.s.l., Tibet, P.R. China) has been completed during the last spring (2007). It consists of a central carpet made of 130 identical sub-units of 12 RPCs each (a ‘‘cluster’’), covering a surface of about 5800m2 with 93% active area, and a guard ring of 24 further clusters of the same type surrounding the central carpet with a lower sampling density. Signals are picked up by external electrodes of small size, thus allowing the sampling of EAS with high space-time granularity. Shower events are detected at a trigger rate of about 4 kHz. Events with a few particles detected by a single cluster are counted in scaler mode on a time base of 500 ms. The intrinsic modularity of the ARGO detector allowed us to collect data even during the setting-up period, using only the central carpet (or even part of it). Some preliminary results from the analysis of events collected in a few months of data taking are presented.

THE ARGO YBJ COLLABORATION G., A.a., B, ., C., B.c., D, ., B., B.e., F, ., et al. (2008). The ARGO-YBJ experiment in Tibet. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 588, 7-13 [10.1016/j.nima.2008.01.019].