Temperature effect on RPC performance in the ARGO-YBJ experiment

Aielli, G.; Bacci, C.; 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, Claudio; Celio, Paola; Chen, S.Z.; Chen, Y.; Cheng, Ning; Creti, P.; Cui, S. W.; Dai, B. Z.; Staiti, G. DʼAlí; Danzengluobu,; Dattoli, M.; Mitri, I. De; Piazzoli, B. D’Ettorre; Vincenzi, M. De; Girolamo, T. Di; Ding, X. H.; Sciascio, G. Di; Feng, C.; Feng, Z.; Feng, Z. Y.; Galeazzi, F.; Galeotti, P.; Gargana, R.; Gou, Q. B.; Guo, Y. Q.; He, H. H.; Hu, Haibing; Hu, Hongbo; Huang, Q.; Iacovacci, M.; Iuppa, R.; James, I.; 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.; Lü, H.; Ma, Xiaohua; Mancarella, G.; Mari, Stefano Maria; Marsella, G.; Martello, D.; Mastroianni, S.; Meng, X. R.; Montini, P.; Ning, C. C.; Pagliaro, A.; Panareo, M.; Perrone, L.; Pistilli, P.; Qu, X. B.; Rossi, E.; Ruggieri, F.; Saggese, L.; Salvini, P.; Santonico, R.; Shen, P. R.; Sheng, X. D.; Shi, Feng; Stănescu, C.; Surdo, A.; Tan, Y. H.; Vallania, P.; Vernetto, S.; Vigorito, C.; Wang, B.; Wang, H.; Wu, C. Y.; Wu, H. R.; Xu, Benda; 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.

doi:10.1016/j.nima.2009.07.020

Cited by 54 publications

(27 citation statements)

References 7 publications

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“…Each strip represents the space granularity of the detector. Signal from each pad is sent to a time-to-digital converter (TDC) and represents the time pixel with a time resolution of about 1.8 ns [22]. The number of fired pads in the central carpet greater than 20 pads in a time window of 420 ns implements the inclusive trigger that starts the DAQ.…”

Section: The Hybrid Experimentsmentioning

confidence: 99%

Knee of the cosmic hydrogen and helium spectrum below 1 PeV measured by ARGO-YBJ and a Cherenkov telescope of LHAASO

Bartoli¹,

Bernardini²,

Bi³

et al. 2015

Phys. Rev. D

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119

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The measurement of the cosmic ray energy spectrum, in particular for individual species of nuclei, is an important tool to investigate cosmic ray production and propagation mechanisms. The determination of the "knees" in the spectra of different species remains one of the main challenges in cosmic ray physics. In fact, experimental results are still conflicting. In this paper we report a measurement of the mixed proton and helium energy spectrum, obtained with the combined data of the ARGO-YBJ experiment and a wide field of view Cherenkov telescope, a prototype of the future LHAASO experiment. By means of a multiparameter technique, we have selected a high-purity proton plus helium sample. The reconstructed energy resolution is found to be about 25% throughout the investigated energy range from 100 TeV to 3 PeV, with a systematic uncertainty in the absolute energy scale of 9.7%. The found energy spectrum can be fitted with a broken power-law function, with a break at the energy E k ¼ 700 AE 230ðstatÞ AE 70ðsysÞ TeV, where the spectral * zhangss@ihep.ac.cn † caozh@ihep.ac.cn PHYSICAL REVIEW D 92, 092005 (2015) 1550-7998=2015=92(9)=092005 (12) 092005-1 © 2015 American Physical Society index changes from −2.56 AE 0.05 to −3.24 AE 0.36. The statistical significance of the observed spectral break is 4.2 standard deviations.

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Section: The Hybrid Experimentsmentioning

confidence: 99%

Knee of the cosmic hydrogen and helium spectrum below 1 PeV measured by ARGO-YBJ and a Cherenkov telescope of LHAASO

Bartoli¹,

Bernardini²,

Bi³

et al. 2015

Phys. Rev. D

Self Cite

119

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“…More details about the detector and the RPC performance can be found in Ref. [43]. Because of the small pixel size, the detector is able to record events with a particle density exceeding 0.02 particles/m 2 keeping good linearity up to a density of about 15 particles/m 2 .…”

Section: The Experimental Set-upmentioning

confidence: 99%

Detection of thermal neutrons with the PRISMA-YBJ array in extensive air showers selected by the ARGO-YBJ experiment

Bartoli

Bernardini

et al. 2016

Astroparticle Physics

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We report on a measurement of thermal neutrons, generated by the hadronic component of extensive air showers (EAS), by means of a small array of EN-detectors developed for the PRISMA project (PRImary Spectrum Measurement Array), novel devices based on a compound alloy of ZnS(Ag) and 6 LiF. This array has been operated within the ARGO-YBJ experiment at the high altitude Cosmic Ray Observatory in Yangbajing (Tibet, 4300 m a.s.l.). Due to the tight correlation between the air shower hadrons and thermal neutrons, this technique can be envisaged as a simple way to estimate the number of high energy hadrons in EAS. Coincident events generated by primary cosmic rays of energies greater than 100 TeV have been selected and analyzed. The EN-detectors have been used to record simultaneously thermal neutrons and the air shower electromagnetic component. The density distributions of both components and the total number of thermal neutrons have been measured. The correlation of these data with the measurements carried out by ARGO-YBJ confirms the excellent performance of the EN-detector.2

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“…The RPCs are operated in streamer mode by using a gas mixture (Ar 15%, Isobutane 10%, TetraFluoroEthane 75%) for high-altitude operation [38]. The high voltage settled at 7.2 kV ensures an overall efficiency of about 96% [39]. The central carpet contains 130 clusters (hereafter ARGO-130), and the full detector is composed of 153 clusters for a total active surface of $6700 m 2 .…”

Section: Argo-ybj Experimentsmentioning

confidence: 99%

Medium scale anisotropy in the TeV cosmic ray flux observed by ARGO-YBJ

Bartoli¹,

Bernardini²,

Bi³

et al. 2013

Phys. Rev. D

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Measuring the anisotropy of the arrival direction distribution of cosmic rays provides important information on the propagation mechanisms and the identification of their sources. In fact, the flux of cosmic rays is thought to be dependent on the arrival direction only due to the presence of nearby cosmic ray sources or particular magnetic-field structures. Recently, the observation of unexpected excesses at TeV energy down to an angular scale as narrow as raised the possibility that the problem of the origin of Galactic cosmic rays may be addressed by studying the anisotropy. The ARGO-YBJ experiment is a full-coverage extensive air showers array, sensitive to cosmic rays with the energy threshold of a few hundred GeV. Searching for small-size deviations from the isotropy, the ARGO-YBJ Collaboration explored the declination region , making use of about events collected from November 2007 to May 2012. In this paper, the detection of different significant (up to 13 standard deviations) medium-scale anisotropy regions in the arrival directions of cosmic rays is reported. The observation was performed with unprecedented detail. The relative excess intensity with respect to the isotropic flux extends up to . The maximum excess occurs for proton energies of 10–20 TeV, suggesting the presence of unknown features of the magnetic fields the charged cosmic rays propagate through, or some contribution of nearby sources never considered so far. The observation of new weaker few-degree excesses throughout the sky region is reported for the first time

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Temperature effect on RPC performance in the ARGO-YBJ experiment

Cited by 54 publications

References 7 publications

Knee of the cosmic hydrogen and helium spectrum below 1 PeV measured by ARGO-YBJ and a Cherenkov telescope of LHAASO

Knee of the cosmic hydrogen and helium spectrum below 1 PeV measured by ARGO-YBJ and a Cherenkov telescope of LHAASO

Detection of thermal neutrons with the PRISMA-YBJ array in extensive air showers selected by the ARGO-YBJ experiment

Medium scale anisotropy in the TeV cosmic ray flux observed by ARGO-YBJ

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