ArcAdiA

Temperature effect on RPC performance in the ARGO-YBJ experiment

2009-08-31T22:00:00Z

Temperature effect on RPC performance in the ARGO-YBJ experiment Aielli, G.; Bacci, Cesare; Bartoli, B.; Bernardini, P.; Bi, X. J.; Bleve, C.; Branchini, Paolo; Budano, Antonio; Bussino, Severino; Calabrese Melcarne, A. K.; Camarri, P.; Cao, Z.; Cappa, A.; Cardarelli, R.; Catalanotti, S.; Cattaneo, C.; Celio, Paola; Chen, S. Z.; Chen, Y.; Cheng, N.; Creti, P.; Cui, S. W.; Dai, B. Z.; D'Ali Staiti, G.; Danzengluobu; Dattoli, M.; De Mitri, I.; D'Ettorre Piazzoli, B.; De Vincenzi, Mario; Di Girolamo, T.; Ding, X. H.; Di Sciascio, G.; Feng, C. F.; Feng, Zhaoyang; Feng, Zhenyong; Galeazzi, Fulvio; Galeotti, P.; Gargana, Riccardo; Gou, Q. B.; Guo, Y. Q.; He, H. H.; Hu, Haibing; Hu, Hongbo; Huang, Q.; Iacovacci, M.; Iuppa, R.; James, Irina; Jia, H. Y.; Labaciren; Li, H. J.; Li, J. Y.; Li, X. X.; Liberti, B.; Liguori, G.; Liu, C.; Liu, C. Q.; Liu, M. Y.; Liu, J.; Lu, H.; Ma, X. H.; Mancarella, G.; Mari, Stefano Maria; Marsella, G.; Martello, D.; Mastroianni, S.; Meng, X. R.; Montini, Paolo; Ning, C. C.; Pagliaro, A.; Panareo, M.; Perrone, L.; Pistilli, Pio; Qu, X. B.; Rossi, E.; Ruggieri, Federico; Saggese, L.; Salvini, P.; Santonico, R.; Shen, P. R.; Sheng, X. D.; Shi, F.; Stanescu, Cristian; Surdo, A.; Tan, Y. H.; Vallania, P.; Vernetto, S.; Vigorito, C.; Wang, B.; Wang, H.; Wu, C. Y.; Wu, H. R.; Xu, B.; Xue, L.; Yan, Y. X.; Yang, Q. Y.; Yang, X. C.; Yuan, A. F.; Zha, M.; Zhang, H. M.; Zhang, JiLong; Zhang, JianLi; Zhang, L.; Zhang, P.; Zhang, X. Y.; Zhang, Y.; Zhaxisangzhu; Zhou, X. X.; Zhu, F. R.; Zhu, Q. Q.; Zizzi, G. 2009-09 Nuclear Instruments & Methods in Physics Research. Section A 608 246-250 The ARGO-YBJ experiment has been taking data for nearly 2 years. In order to monitor continuously the performance of the Resistive Plate Chamber detectors and to study the daily temperature effects on the detector performance, a cosmic ray muon telescope was setup near the carpet detector array in the ARGO-YBJ laboratory. Based on the measurements performed using this telescope, it is found that, at the actual operating voltage of 7.2kV, the temperature effect on the RPC time resolution is about 0.04ns/degrees C and on the particle detection efficiency is about 0.03%/degrees C. Based on these figures we conclude that the environmental effects do not affect substantially the angular resolution of the ARGO-YBJ detector.

Software timing calibration of the ARGO-YBJ detector

2008-12-31T23:00:00Z

Software timing calibration of the ARGO-YBJ detector Aielli, G.; Bacci, Cesare; Bartoli, B.; Bernardini, P.; Bi, X. J.; Bleve, C.; Branchini, P.; Budano, A.; Bussino, Severino; Calabrese Melcarne, A. K.; Camarri, P.; Cao, Z.; Cappa, A.; Cardarelli, R.; Catalanotti, S.; Cattaneo, C.; Cavaliere, S.; Celio, Paola; Chen, S. Z.; Cheng, N.; Creti, P.; Cui, S. W.; Cusumano, G.; Dai, B. Z.; D'Ali Staiti, G.; Danzengluobu; Dattoli, M.; De Mitri, I.; D'Ettorre Piazzoli, B.; De Vincenzi, Mario; Di Girolamo, T.; Ding, X. H.; Di Sciascio, G.; Feng, C. F.; Feng, Zhaoyang; Feng, Zhenyong; Ferrigno, C.; Galeazzi, Fulvio; Galeotti, P.; Gao, X. Y.; Gargana, Riccardo; Gou, Q. B.; He, H. H.; Hu, Haibing; Hu, Hongbo; Huang, Q.; Iacovacci, M.; James, I.; Jia, H. Y.; Labaciren; Li, H. J.; Li, J. Y.; Liberti, B.; Liguori, G.; Liu, C. Q.; Liu, J.; Lu, H.; Mancarella, G.; Mari, Stefano Maria; Marsella, G.; Martello, D.; Mastroianni, Stefano; Meng, X. R.; Mu, J.; Nicastro, L.; Ning, C. C.; Palummo, L.; Panareo, M.; Perrone, L.; Pino, C.; Pistilli, Pio; Qu, X. B.; Rossi, E.; Ruggieri, Federico; Saggese, L.; Salvini, P.; Santonico, R.; Segreto, A.; Shen, P. R.; Sheng, X. D.; Shi, F.; Stanescu, Cristian; Surdo, A.; Tan, Y. H.; Vallania, P.; Vernetto, S.; Vigorito, C.; Wang, H.; Wang, Y. G.; Wu, C. Y.; Wu, H. R.; Xu, B.; Xue, L.; Yang, H. T.; Yang, Q. Y.; Yang, X. C.; Yu, G. C.; Yuan, A. F.; Zha, M.; Zhang, H. M.; Zhang, J. L.; Zhang, L.; Zhang, P.; Zhang, X. Y.; Zhang, Y.; Zhaxisangzhu; Zhou, X. X.; Zhu, F. R.; Zhu, Q. Q.; Zizzi, G. 2009-01 Astroparticle Physics 30 287-292 The ARGO-YBJ experiment is mainly devoted to search for astronomical gamma sources. The arrival direction of air showers is reconstructed thanks to the times measured by the pixels of the detector. Therefore, the timing calibration of the detector pixels is crucial in order to get the best angular resolution and pointing accuracy. Because of the large number of pixels a hardware timing calibration is practically impossible. Therefore an off-line software calibration has been adopted. Here, the details of the procedure and the results are presented.

Proton-air cross section measurement with the ARGO-YBJ cosmic ray experiment

2009-11-15T23:00:00Z

Proton-air cross section measurement with the ARGO-YBJ cosmic ray experiment Aielli, G.; Bacci, Cesare; Bartoli, B.; Bernardini, P.; Bi, X. J.; Bleve, C.; Branchini, Paolo; Budano, A.; Bussino, Severino; Calabrese Melcarne, A. K.; Camarri, P.; Cao, Z.; Cappa, A.; Cardarelli, R.; Catalanotti, S.; Cattaneo, C.; Celio, Paola; Chen, S. Z.; Chen, Y.; Cheng, N.; Creti, P.; Cui, S. W.; Dai, B. Z.; D'Ali Staiti, G.; Danzengluobu; Dattoli, M.; De Mitri, I.; D'Ettorre Piazzoli, B.; De Vincenzi, Mario; Di Girolamo, T.; Ding, X. H.; Di Sciascio, G.; Feng, C. F.; Feng, Zhaoyang; Feng, Zhenyong; Galeazzi, Fulvio; Galeotti, P.; Gargana, Riccardo; Gou, Q. B.; Guo, Y. Q.; He, H. H.; Hu, Haibing; Hu, Hongbo; Huang, Q.; Iacovacci, M.; Iuppa, R.; James, Irina; Jia, H. Y.; Labaciren; Li, H. J.; Li, J. Y.; Li, X. X.; Liberti, B.; Liguori, G.; Liu, C.; Liu, C. Q.; Liu, M. Y.; Liu, J.; Lu, H.; Ma, X. H.; Mancarella, G.; Mari, Stefano Maria; Marsella, G.; Martello, D.; Mastroianni, Stefano; Meng, X. R.; Montini, Paolo; Ning, C. C.; Pagliaro, A.; Panareo, M.; Perrone, L.; Pistilli, Pio; Qu, X. B.; Rossi, E.; Ruggieri, Federico; Saggese, L.; Salvini, P.; Santonico, R.; Shen, P. R.; Sheng, X. D.; Shi, F.; Stanescu, Cristian; Surdo, A.; Tan, Y. H.; Vallania, P.; Vernetto, S.; Vigorito, C.; Wang, B.; Wang, H.; Wu, C. Y.; Wu, H. R.; Xu, B.; Xue, L.; Yan, Y. X.; Yang, Q. Y.; Yang, X. C.; Yuan, A. F.; Zha, M.; Zhang, H. M.; Zhang, JiLong; Zhang, JianLi; Zhang, L.; Zhang, P.; Zhang, X. Y.; Zhang, Y.; Zhaxisangzhu; Zhou, X. X.; Zhu, F. R.; Zhu, Q. Q.; Zizzi, G. 2009-11-16 Physical Review D 80 092004 The proton-air cross section in the energy range 1-100 TeV has been measured by the ARGO-YBJ cosmic ray experiment. The analysis is based on the primary cosmic ray flux attenuation for different atmospheric depths (i.e. zenith angles) and exploits the detector capabilities of selecting the shower development stage by means of hit multiplicity, density and lateral profile measurements at ground. The effects of shower fluctuations, the contribution of heavier primaries and the uncertainties of the hadronic interaction models, have been taken into account. The results have been used to estimate the total proton-proton cross section at center-of-mass energies between 70 and 500 GeV, where no accelerator data are currently available.

ARGO-YBJ constraints on very high energy emission from GRBs

2009-07-31T22:00:00Z

ARGO-YBJ constraints on very high energy emission from GRBs Aielli, G.; Bacci, Cesare; Bartoli, B.; Bernardini, P.; Bi, X. J.; Bleve, C.; Branchini, Paolo; Budano, Antonio; Bussino, Severino; Calabrese Melcarne, A. K.; Camarri, P.; Cao, Z.; Cappa, A.; Cardarelli, R.; Catalanotti, S.; Cattaneo, C.; Celio, Paola; Chen, S. Z.; Chen, Y.; Cheng, N.; Creti, P.; Cui, S. W.; Dai, B. Z.; D'Ali Staiti, G.; Danzengluobu; Dattoli, M.; De Mitri, I.; D'Ettorre Piazzoli, B.; De Vincenzi, Mario; Di Girolamo, T.; Ding, X. H.; Di Sciascio, G.; Feng, C. F.; Feng, Zhaoyang; Feng, Zhenyong; Galeazzi, Fulvio; Galeotti, P.; Gargana, Riccardo; Gou, Q. B.; Guo, Y. Q.; He, H. H.; Hu, Haibing; Hu, Hongbo; Huang, Q.; Iacovacci, M.; Iuppa, R.; James, Irina; Jia, H. Y.; Labaciren; Li, H. J.; Li, J. Y.; Li, X. X.; Liberti, B.; Liguori, G.; Liu, C.; Liu, C. Q.; Liu, M. Y.; Liu, J.; Lu, H.; Ma, X. H.; Mancarella, G.; Mari, Stefano Maria; Marsella, G.; Martello, D.; Mastroianni, S.; Meng, X. R.; Montini, Paolo; Ning, C. C.; Pagliaro, A.; Panareo, M.; Perrone, L.; Pistilli, Pio; Qu, X. B.; Rossi, E.; Ruggieri, Federico; Saggese, L.; Salvini, P.; Santonico, R.; Shen, P. R.; Sheng, X. D.; Shi, F.; Stanescu, Cristian; Surdo, A.; Tan, Y. H.; Vallania, P.; Vernetto, S.; Vigorito, C.; Wang, B.; Wang, H.; Wu, C. Y.; Wu, H. R.; Xu, B.; Xue, L.; Yan, Y. X.; Yang, Q. Y.; Yang, X. C.; Yuan, A. F.; Zha, M.; Zhang, H. M.; Zhang, JiLong; Zhang, JianLi; Zhang, L.; Zhang, P.; Zhang, X. Y.; Zhang, Y.; Zhaxisangzhu; Zhou, X. X.; Zhu, F. R.; Zhu, Q. Q.; Zizzi, G. 2009-08 Astroparticle Physics 32 47-52 The ARGO-YBJ (Astrophysical Radiation Ground-based Observatory at YangBajing) experiment is designed for very high energy gamma-astronomy and cosmic ray researches. Due to the full coverage of a large area(5600 m(2)) with resistive plate chambers at a very high altitude (4300m a.s.l.), the ARGO-YBJ detector is used to search for transient phenomena, such as Gamma-ray bursts (GRBs). Because the ARGO-YBJ detector has a large field of view (similar to 2 sr) and is operated with a high duty cycle (>90%), it is well suited for GRB surveying and can be operated in searches for high energy GRBs following alarms set by satellite-borne observations at lower energies. In this paper, the sensitivity of the ARGO-YBJ detector for GRB detection is estimated. Upper limits to fluence with 99% confidence level for 26 GRBs inside the field of view from June 2006 to January 2009 are set in the two energy ranges 10-100 GeV and 10 GeV-1 TeV.

Search for gamma ray bursts with the argo-ybj detector in scaler mode

2009-06-30T22:00:00Z

Search for gamma ray bursts with the argo-ybj detector in scaler mode Aielli, G.; Bacci, Cesare; Barone, F.; Bartoli, B.; Bernardini, P.; Bi, X. J.; Bleve, C.; Branchini, P.; Budano, A.; Bussino, S.; Melcarne, A. K. Calabrese; Camarri, P.; Cao, Z.; Cappa, A.; Cardarelli, R.; Catalanotti, S.; Cattaneo, C.; Cavaliere, S.; Celio, Paola; Chen, S. Z.; Cheng, N.; Creti, P.; Cui, S. W.; Dai, B. Z.; Staiti, G. D'Ali; Danzengluobu; Dattoli, M.; De Mitri, I.; De Rosa, R.; Piazzoli, B. D'Ettorre; De Vincenzi, Mario; Di Girolamo, T.; Ding, X. H.; Di Sciascio, G.; Feng, C. F.; Feng, Zhaoyang; Feng, Zhenyong; Galeazzi, F.; Galeotti, P.; Gao, X. Y.; Gargana, R.; Garufi, F.; Gou, Q. B.; Guo, Y. Q.; He, H. H.; Hu, Haibing; Hu, Hongbo; Huang, Q.; Iacovacci, M.; Iuppa, R.; James, Irina; Jia, H. Y.; Labaciren; Li, H. J.; Li, J. Y.; Liberti, B.; Liguori, G.; Liu, C. Q.; Liu, J.; Lu, H.; Mancarella, G.; Mari, Stefano Maria; Marsella, G.; Martello, D.; Mastroianni, S.; Meng, X. R.; Mu, J.; Ning, C. C.; Palummo, L.; Panareo, M.; Perrone, L.; Pistilli, Pio; Qu, X. B.; Rossi, E.; Ruggieri, F.; Saggese, L.; Salvini, P.; Santonico, R.; Segreto, A.; Shen, P. R.; Sheng, X. D.; Shi, F.; Stanescu, C.; Surdo, A.; Tan, Y. H.; Vallania, P.; Vernetto, S.; Vigorito, C.; Wang, H.; Wang, Y. G.; Wu, C. Y.; Wu, H. R.; Xu, B.; Xue, L.; Yang, H. T.; Yang, Q. Y.; Yang, X. C.; Yu, G. C.; Yuan, A. F.; Zha, M.; Zhang, H. M.; Zhang, J. L.; Zhang, L.; Zhang, P.; Zhang, X. Y.; Zhang, Y.; Zhaxisangzhu; Zhou, X. X.; Zhu, F. R.; Zhu, Q. Q.; Zizzi, G. 2009-07 Astrophysical journal 699 1281-1287 We report on the search for gamma ray bursts (GRBs) in the energy range1-100 GeV in coincidence with the prompt emission detected bysatellites using the Astrophysical Radiation with Ground-basedObservatory at YangBaJing (ARGO-YBJ) air shower detector. Thanks to itsmountain location (Yangbajing, Tibet, People's Republic of China, 4300m above sea level), active surface (similar to 6700 m(2) of ResistivePlate Chambers), and large field of view (similar to 2 sr, limited onlyby the atmospheric absorption), the ARGO-YBJ air shower detector isparticularly suitable for the detection of unpredictable and shortduration events such as GRBs. The search is carried out using the"single particle technique," i.e., counting all the particles hittingthe detector without measurement of the energy and arrival direction ofthe primary gamma rays. Between 2004 December 17 and 2009 April 7, 81GRBs detected by satellites occurred within the field of view ofARGO-YBJ (zenith angle theta <= 45 degrees). It was possible to examine62 of these for > 1 GeV counterpart in the ARGO-YBJ data finding nostatistically significant emission. With a lack of detected spectra inthis energy range fluence upper limits are profitable, especially whenthe redshift is known and the correction for the extragalacticabsorption can be considered. The obtained fluence upper limits reachvalues as low as 10(-5) erg cm(-2) in the 1-100 GeV energy region.Besides this individual search for a higher energy counterpart, astatistical study of the stack of all the GRBs both in time and inphase was made, looking for a common feature in the GRB high-energyemission. No significant signal has been detected.