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518 results on '"Panareo M"'

501. Simulation study of air shower particles near the core region

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.

Subjects
Physics, Nuclear and High Energy Physics, Shower array detector, Particle number, shower core, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Astrophysics::Instrumentation and Methods for Astrophysics, Cosmic ray, Signal, extensive air shower, Atomic and Molecular Physics, and Optics, Computational physics, Argo-Ybj, Core (optical fiber), Nuclear physics, detector array, Analog signal, Air shower, Energy (signal processing)
Abstract

The ARGO-YBJ experiment has two kinds of signals in the shower working mode which allows coverage of the energy region from TeV to PeV region. One is the digital strip pattern, another is so-called ‘big pad’ mode, which is the analog signal counting the pulse height on half of an RPC, proportional to the number of hitting particles. In this paper by using the Monte Carlo simulation method the ARGO-YBJ sensitivity to the cosmic ray composition is discussed, by using the ‘big pad’ signal for measuring the number of particles detected close to the shower core.

Published
2008

502. A CMOS high-speed front-end for cluster counting techniques in ionization detectors

Author

R. Perrino, F. Grancagnolo, M. De Matteis, Gabriele Chiodini, G. F. Tassielli, Andrea Baschirotto, M. Panareo, Stefano D'Amico, Baschirotto, A, D’Amico, S, DE MATTEIS, M, Grancagnolo, F, Panareo, M, Perrino, R, Chiodini, G, Tassielli, G, A., Baschirotto, D'Amico, Stefano, M., DE MATTEIS, F., Grancagnolo, Panareo, Marco, R., Perrino, G., Chiodini, and Tassielli, GIOVANNI FRANCESCO

Subjects
Ionization, Integrated circuit, Preamplifier, Digital to analog conversion, Inert gase, Chlorine compound, Analog-to-digital converter, Integrated circuit design, Speed, Helium, law.invention, Separation, Front and back ends, MOS capacitor, law, Electronic engineering, Networks (circuits), Electronics industry, Sensor, Physics, business.industry, Detector, Bandwidth (signal processing), Multicarrier modulation, Electrical engineering, CMOS, Telecommunication system, business, Ionization of gase
Abstract

The counting of the consecutive ionization clusters in a drift chamber is a very promising technique for particle identification purposes. Although this technique features a number of advantages, the bottleneck for its implementation is represented by the difficulties in realizing a low cost, high-speed electronic interface. In fact, typical time separation between each ionization act in a helium-based gas mixture is from a few ns to a few tens of ns. Thus the read-out interface has to be able to process such a high-speed signals. It will be demonstrated that a read-out channel composed of a fast, large bandwidth preamplifier and of a large conversion rate Analog-to-Digital converter fullfil all the requirements for cluster counting. The recent scaled CMOS integrated circuit technologies allows to realize such a low-cost high-speed front-end, opening the possibility of realizing efficient cluster-counter-based detectors. In this paper, a CMOS 0.13 μm integrated readout circuit, including a fast preamplifier (with a -3B bandwidth of 500MHz) and lGS/s-6bit ADC is designed for the central tracker of a future collider (ILC, super-B). The performance and the design issues associated to this architecture are discussed. © 2007 IEEE.

Published
2008

503. Characteristic Plane Method with Conical Correction

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi

Subjects
Physics, Nuclear and High Energy Physics, Timing Calibration, business.industry, Plane (geometry), Astrophysics::High Energy Astrophysical Phenomena, Detector, Monte Carlo method, Astrophysics::Instrumentation and Methods for Astrophysics, Extensive Air Shower, Conical surface, Cosmic Ray, Characteristic Plane Method, Atomic and Molecular Physics, and Optics, Argo-Ybj, Planar, Optics, Position (vector), Detector Array, Calibration, Angular resolution, business, Physics::Atmospheric and Oceanic Physics
Abstract

In ground-based cosmic ray experiments, the equalization of the transit time of signals coming from different parts of the apparatus is of crucial importance for the improvement of the angular resolution and accuracy. In the ARGO-YBJ experiment, this is achieved using the Characteristic Plane Method with conical correction, studied by both Monte Carlo simulation and real data and also checked with manual absolute calibration on a portion of the detector. By introducing conical correction in primary direction reconstruction, the systematics error existing in the off-line calibration with planar fit is successfully removed. Two subsequent construction phases of the detector have been considered: ARGO-42 and ARGO-104. During the calibration of ARGO-104, events with more than 1000 hits and with the core reconstructed inside the carpet were used in order to achieve a good reconstruction of the shower, that is the arrival direction and the core position. The results of the calibration concerning the two configurations, ARGO-42 and ARGO-104, are compared and discussed.

Published
2008

504. Status of ARGO-YBJ: an overview

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi

Subjects
Physics, Gamma ray Astronomy, Nuclear and High Energy Physics, Resistive touchscreen, Gamma Astronomy, Trigger rate, Detector, Cosmic ray, Extensive Air Shower, Gamma-ray astronomy, Atomic and Molecular Physics, and Optics, Argo-Ybj, Nuclear physics, Detector Array, Argo
Abstract

Within a Collaboration Agreement between INFN and CAS (Chinese Academy of Science), the ARGO-YBJ experiment is completely installed at the YangBaJing Cosmic Ray Laboratory (4300 m a.s.l., Tibet, P.R. China). ARGO-YBJ is a plane detector, with a total detection area of ∼ 6500 m 2 , made of Resistive Plate Chambers (RPCs) which provide a detailed space-time picture of the charged component of the extensive air showers. At present the detector is completely mounted and the central carpet of 5800 m 2 is operating under a multiplicity trigger N p a d ⩾ 20 , the trigger rate is about 3.5kHz and the data flow is 5MB/s. A 0.5 cm lead converter will be mounted on the detector in summer 2007.

Published
2008

505. Simulation of the ARGO-YBJ experiment operated in Scaler Mode

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.

Subjects
Physics, Nuclear and High Energy Physics, array detector, Photon, Proton, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Antenna aperture, Detector, chemistry.chemical_element, scaler mode, Cosmic ray, Atomic and Molecular Physics, and Optics, Spectral line, Computational physics, Argo-Ybj, gamma ray burst, Optics, chemistry, Extended air shower, business, Gamma-ray burst, Energy (signal processing), Helium
Abstract

The ARGO-YBJ experiment is a large area full coverage detector operating at high mountain altitude (4300 m a.s.l., Tibet, China, ∼6700 m2 active surface). In scaler mode, the particle rate is recorded at fixed time intervals (0.5 s), allowing the achievement of an energy threshold as low as E t h ∼ 1 GeV for the photons. This result, together with the estimate of the effective area as a function of the primary energy, has been obtained using the simulation code CORSIKA6201 for the shower development in the atmosphere and a dedicated and detailed detector simulation, ARGOG, based on GEANT3.21. With this simulation chain, and using the known primary proton and helium spectra, we obtained counting rates consistent with the measured ones, making us confident in the expectation of the detector performance as far as the photon shower detection is concerned, which is of crucial importance to determine the capability of the ARGO-YBJ experiment to detect gamma-ray bursts (GRBs).

Published
2008

506. ARGO-YBJ experiment and the Tev gamma astronomy

Author

The Argo YBJ Collaboration: G. Aielli a, b, C. Bacci c, d, F. Barone e, f, B. Bartoli g, P. Bernardini h, i, X. J. Bi j, C. Bleve h, i, 1, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne h, P. Camarri a, Z. Cao j, A. Cappa k, l, R. Cardarelli b, S. Catalanotti g, C. Cattaneo m, S. Cavaliere g, P. Celio c, S. Z. Chen j, N. Cheng j, P. Creti i, S. W. Cui n, G. Cusumano o, p, B. Z. Dai q, G. D’Alí Staiti p, r, Danzengluobu s, M. Dattoli k, l, t, I. De Mitri h, R. De Rosa g, B. D’Ettorre Piazzoli g, M. De Vincenzi c, T. Di Girolamo g, X. H. Ding s, G. Di Sciascio f, C. F. Feng u, Zhaoyang Feng j, Zhenyong Feng v, C. Ferrigno o, F. Galeazzi d, P. Galeotti k, t, X. Y. Gao q. R. Gargana d, F. Garufi g, Q. B. Gou j, H. H. He j, Haibing Hu s, Hongbo Hu j, Q. Huang v, M. Iacovacci g, I. James m, w, H. Y. Jia v, Labaciren s, H. J. Li s, J. Y. Li u, B. Liberti b, G. Liguori m, C. Q. Liu q, J. Liu q, H. Lu j, G. Mancarella h, c, d, G. Marsella i, x, D. Martello h, S. Mastroianni c, X. R. Meng s, J. Mu q, L. Nicastro p, y, C. C. Ning s, L. Palummo a, M. Panareo i, L. Perrone i, P. Pistilli c, X. B. Qu u, E. Rossi f, F. Ruggieri d, L. Saggese g, P. Salvini m, R. Santonico a, A. Segreto o, P. R. Shen j, X. D. Sheng j, F. Shi j, C. Stanescu d, A. Surdo i, Y. H. Tan j, P. Vallania k, S. Vernetto k, C. Vigorito k, H. Wang j, Y. G. Wang j, C. Y. Wu j, H. R. Wu j, B. Xu v, L. Xue u, H. T. Yang q, Q. Y. Yang q, X. C. Yang q, G. C. Yu v, A. F. Yuan s, M. Zha j, H. M. Zhang j, J. L. Zhang j, L. Zhang q, P. Zhang q, X. Y. Zhang u, Y. Zhang j, Zhaxisangzhu s, X. X. Zhou v, F. R. Zhu j, Q. Q. Zhu j, G. Zizzi h, MARI, Stefano Maria, The Argo YBJ Collaboration: G., Aielli a, B, C., Bacci c, D, F., Barone e, F, B., Bartoli g, P., Bernardini h, I, X. J., Bi j, C., Bleve h, I, 1, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne h, P., Camarri a, Z., Cao j, A., Cappa k, L, R., Cardarelli b, S., Catalanotti g, C., Cattaneo m, S., Cavaliere g, P., Celio c, S. Z., Chen j, N., Cheng j, P., Creti i, S. W., Cui n, G., Cusumano o, P, B. Z., Dai q, G., D’Alí Staiti p, R, Danzengluobu, S, M., Dattoli k, L, T, I., De Mitri h, R., De Rosa g, B., D’Ettorre Piazzoli g, M., De Vincenzi c, T., Di Girolamo g, X. H., Ding, G., Di Sciascio f, C. F., Feng u, Zhaoyang Feng, J, Zhenyong Feng, V, C., Ferrigno o, F., Galeazzi d, P., Galeotti k, T, X. Y. Gao q. R., Gargana d, F., Garufi g, Q. B., Gou j, H. H., He j, Haibing Hu, S, Hongbo Hu, J, Q., Huang v, M., Iacovacci g, I., James m, W, H. Y., Jia v, Labaciren, S, H. J., Li, J. Y., Li u, B., Liberti b, G., Liguori m, C. Q., Liu q, J., Liu q, H., Lu j, G., Mancarella h, Mari, Stefano Maria, C, D, G., Marsella i, X, D., Martello h, S., Mastroianni c, X. R., Meng, J., Mu q, L., Nicastro p, Y, C. C., Ning, L., Palummo a, M., Panareo i, L., Perrone i, P., Pistilli c, X. B., Qu u, E., Rossi f, F., Ruggieri d, L., Saggese g, P., Salvini m, R., Santonico a, A., Segreto o, P. R., Shen j, X. D., Sheng j, F., Shi j, C., Stanescu d, A., Surdo i, Y. H., Tan j, P., Vallania k, S., Vernetto k, C., Vigorito k, H., Wang j, Y. G., Wang j, C. Y., Wu j, H. R., Wu j, B., Xu v, L., Xue u, H. T., Yang q, Q. Y., Yang q, X. C., Yang q, G. C., Yu v, A. F., Yuan, M., Zha j, H. M., Zhang j, J. L., Zhang j, L., Zhang q, P., Zhang q, X. Y., Zhang u, Y., Zhang j, Zhaxisangzhu, S, X. X., Zhou v, F. R., Zhu j, Q. Q., Zhu j, G., Zizzi h, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., and Bernardini, Paolo

Subjects
Physics, Gamma ray Astronomy, Nuclear and High Energy Physics, Range (particle radiation), Photon, Physics::Instrumentation and Detectors, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Gamma-ray astronomy, Astrophysics, Declination, Atomic and Molecular Physics, and Optics, Astronomia gamma, Argo-Ybj, Sciami estesi, Air shower, Raggi cosmici, Sky, Extensive Air shower, Ultra-high-energy cosmic ray, media_common
Abstract

The ARGO-YBJ detector is an extensive air shower array consisting of a carpet of Resistive Plate Chambers (RPCs). Very high energy (VHE) gamma ray astronomy is the main scientific goal of this Chinese-Italian experiment. High altitude and full coverage ensure a low energy threshold (few hundreds of GeV for primary photons), high duty-cycle and large field of view allow a continuous sky survey in the declination range from −10° to +70°. Also many features of the high energy cosmic rays are studied by ARGO-YBJ exploiting the unprecented shower reconstruction.

Published
2007

507. CRAB NEBULA: FIVE-YEAR OBSERVATION WITH ARGO-YBJ

Author

X. C. Yang, B. Bartoli, R. Cardarelli, X. Y. Zhang, G. Marsella, B. D'Ettorre Piazzoli, Minghui Liu, Zhenyong Feng, H. H. He, C. Y. Wu, L. Xue, Q. B. Gou, Q. Y. Yang, M. Iacovacci, M. Zha, G. Zizzi, P. Salvini, L. Perrone, X. D. Sheng, Paolo Bernardini, J. W. Zhao, H. R. Wu, Piero Vallania, P. Creti, H. Y. Jia, Paolo Camarri, I. De Mitri, Zihuang Cao, L. Zhang, T. L. Chen, Haifeng Li, Cunfeng Feng, M. Panareo, S. M. Mari, B. Z. Dai, Pengnian Shen, Lanqing Ma, Z. G. Yao, F. Ruggieri, Danzengluobu, S. Catalanotti, Hongbo Hu, A. Surdo, Yicheng Guo, A. Budano, Y. H. Tan, S. W. Cui, R. Santonico, X. J. Bi, Fudong Shi, Chang-Chun Ning, X. H. Ma, H. Lu, P. Branchini, Zhaoyang Feng, G. Liguori, S. Z. Chen, S. Mastroianni, G. Mancarella, Paolo Montini, F. R. Zhu, R. Iuppa, C. X. Liu, S. Vernetto, G. Di Sciascio, E. Striani, Q. Q. Zhu, H. W. Wang, A. D'Amone, J. K. K. Liu, Zhaxiciren, Labaciren, A. F. Yuan, P. Pistilli, H. M. Zhang, X. X. Zhou, Haibing Hu, Y. Zhang, D. Martello, Carlo Vigorito, T. Di Girolamo, Zhaxisangzhu, ITA, Bartoli, B., Bernardini, P., Bi, X. J., Branchini, P., Budano, A., Camarri, P., Cao, Z., Cardarelli, R., Catalanotti, S., Chen, S. Z., Chen, T. L., Creti, P., Cui, S. W., Dai, B. Z., D'Amone, A., Danzengluobu, De Mitri, I., D'Ettorre Piazzoli, B., Di Girolamo, T., Di Sciascio, G., Feng, C. F., Feng, Zhaoyang, Feng, Zhenyong, Gou, Q. B., Guo, Y. Q., He, H. H., Hu, Haibing, Hu, Hongbo, Iacovacci, M., Iuppa, R., Jia, H. Y., Labaciren, Li, H. J., Liguori, G., Liu, C., Liu, J., Liu, M. Y., Lu, H., Ma, L. L., Ma, X. H., Mancarella, G., Mari, S. M., Marsella, G., Martello, D., Mastroianni, S., Montini, P., Ning, C. C., Panareo, M., Perrone, L., Pistilli, P., Ruggieri, F., Salvini, P., Santonico, R., Shen, P. R., Sheng, X. D., Shi, F., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, H., Wu, C. Y., Wu, H. R., Xue, L., Yang, Q. Y., Yang, X. C., Yao, Z. G., Yuan, A. F., Zha, M., Zhang, H. M., Zhang, L., Zhang, X. Y., Zhang, Y., Zhao, J., Zhaxisangzhu, Zhaxiciren, Zhou, X. X., Zhu, F. R., Zhu, Q. Q., Zizzi, G., Striani, E., B., Bartoli, Bernardini, Paolo, X. J., Bi, P., Branchini, A., Budano, P., Camarri, Z., Cao, R., Cardarelli, S., Catalanotti, S. Z., Chen, T. L., Chen, P., Creti, S. W., Cui, B. Z., Dai, D'Amone, Antonio, DE MITRI, Ivan, B., D'Ettorre Piazzoli, T., Di Girolamo, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, M., Iacovacci, R., Iuppa, H. Y., Jia, H. J., Li, G., Liguori, C., Liu, J., Liu, M. Y., Liu, H., Lu, L. L., Ma, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, C. Y., Wu, H. R., Wu, L., Xue, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, L., Zhang, X. Y., Zhang, Y., Zhang, J., Zhao, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, E., Striani, Bartoli, Bruno, Catalanotti, Sergio, Danzengluobu, Null, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Iacovacci, Michele, Labaciren, Null, Zhaxiciren, Null, and Zhaxisangzhu, Null

Subjects
Physics, Spectral index, Astrophysics::High Energy Astrophysical Phenomena, Settore FIS/01 - Fisica Sperimentale, individual (Crab Nebula) [pulsars], Flux, Astronomy and Astrophysics, Astrophysics, Light curve, Power law, star [gamma rays], Air shower, Crab Nebula, Pulsar, Space and Planetary Science, Cutoff, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena
Abstract

The ARGO-YBJ air shower detector monitored the Crab Nebula gamma ray emission from 2007 November to 2013 February. The integrated signal, consisting of $\sim$3.3 $\times$ 10$^5$ events,reached the statistical significance of 21.1 standard deviations. The obtained energy spectrum in the energy range 0.3-20 TeV can be described by a power law function dN/dE = I$_0$ (E / 2 TeV)$^{-\alpha}$, with a flux normalization I$_0$ = (5.2 $\pm$ 0.2) $\times$ 10$^{-12}$ photons cm$^{-2}$ s$^{-1}$ TeV$^{-1}$ and $\alpha$ = 2.63 $\pm$ 0.05, corresponding to an integrated flux above 1 TeV of 1.97 $\times$ 10$^{-11}$ photons cm$^{-2}$ s$^{-1}$. The systematic error is estimated to be less than 30$\%$ for the flux normalization and 0.06 for the spectral index. Assuming a power law spectrum with an exponential cutoff dN/dE = I$_0$ (E / 2 TeV)$^{-\alpha}$ $\exp$ (-E / E$_{cut}$), the lower limit of the cutoff energy E$_{cut}$ is 12 TeV, at 90$\%$ confidence level. Our extended dataset allows the study of the TeV emission over long timescales. Over five years, the light curve of the Crab Nebula in 200-day bins is compatible with a steady emission with a probability of 7.3 $\times$ 10$^{-2}$. A correlated analysis with Fermi-LAT data over $\sim$4.5 years using the light curves of the two experiments gives a Pearson correlation coefficient $r$ = 0.56 $\pm$ 0.22. Concerning flux variations on timescales of days, a "blind" search for flares with a duration of 1-15 days gives no excess with a significance higher than four standard deviations. The average rate measured by ARGO-YBJ during the three most powerful flares detected by Fermi-LAT is 205 $\pm$ 91 photons day$^{-1}$, consistent with the average value of 137 $\pm$ 10 day$^{-1}$., Comment: 12 pages, 10 figures

Published
2015

508. First results on the angular resolution of the ARGO-YBJ detector

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, C., Baccia, K. Z., Baob, F., Baronec, B., Bartolic, P., Bernardinid, S., Bussinoa, E., Callonic, B. Y., Caoe, R., Cardarellif, S., Catalanottic, S., Cavalierec, F., Cesaronid, P., Cretid, Danzengluobug, B., D’Ettorrepiazzolic, M., De Vincenzia, T., Di Girolamoc, G., Di Sciascioc, Z. Y., Fengh, Y., Fue, X. Y., Gaoi, Q. X., Gengi, H. W., Guog, H. H., Hej, M., Hee, Q., Huangh, M., Iacovaccic, N., Iuccia, H. Y., Jaih, C. L., Jingj, F. M., Konge, H. H., Kuangj, Labacireng, B., Lib, J. Y., Lie, Z. Q., Liui, H., Luj, X. H., Maj, G., Mancarellad, Mari, Stefano Maria, A, G., Marsellad, D., Martellod, X. R., Mengg, L., Milanoc, J., Mui, M., Panareod, Z. R., Pengj, P., Pistillia, L., Saggesec, R., Santonicof, P. R., Shenj, C., Stanescua, L. R., Sunb, S. C., Sunb, A., Surdod, Y. H., Tanj, S., Vernettok, C. R., Wange, H., Wangj, H. Y., Wangj, Y. N., Weib, H. T., Yangj, Q. K., Yaob, G. C., Yuh, X. D., Yueb, A. F., Yuang, M., Zhaj, H. M., Zhangj, J. L., Zhangj, N. J., Zhange, X. Y., Zhange, Zhaxisangzhug, Zhaxicireng, Q. Q., Zhuj, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, and Q. Q., Zhu

Subjects
History, Geography, Extended Air shower, Detector, Air shower array, Angular resolution, Cosmic Ray, Extensive Air Shower, Array Detector, Angular Resolution, Cartography, Argo, Computer Science Applications, Education, Remote sensing, Argo-Ybj
Abstract

We present the first results on the angular resolution of the ARGO-YBJ detector in data taking at the Yangbajing Laboratory (Tibet, People's Republic of China, 4300 m a.s.l.).

Published
2006

509. Layout and performance of RPC used in the Argo-YBJ experiment

Author

C. Y. Wu, Haibing Hu, S. Bricola, C. Bleve, B. D'Ettorre Piazzoli, H.T. Yang, L. Saggese, X. Y. Zhang, Q. Q. Zhu, C. Pinto, C.C. Ning, L. Perrone, P. Salvini, L. Xue, Zhengguo Cao, J. Y. Li, G. D'Alí Staiti, R. Santonico, P. Pistilli, X. X. Zhou, Hongbo Hu, C. F. Feng, K Fratini, A. F. Yuan, A. Surdo, Labaciren, P. Vallania, X. J. Bi, Yonggang Wang, Q. Huang, F. Shi, P. R. Shen, M. Zha, Zhaxisangzhu, X. R. Meng, I. De Mitri, Zhaoyang Feng, R. Assiro, Zhenyong Feng, T. Di Girolamo, H. M. Zhang, I. James, J. Mu, P. Celio, C. Pino, Haoqi Lu, N.J. Zhang, Y. H. Zhang, Luciano Nicastro, M. Iacovacci, G. Mancarella, F. R. Zhu, D. Martello, Yungang Wang, C. Liu, S. Vernetto, M. Cavalli Sforza, P. Zhang, S. M. Mari, B. D'Aquino, Sergio Cavaliere, D. Campana, A. Mangano, G. Pellizzoni, B. Liberti, B. Z. Dai, Huihai He, E. De Marinis, Cristian Stanescu, G. Aielli, H. J. Li, H. R. Wu, Severino Angelo Maria Bussino, Q. B. Gou, G. Di Sciascio, M. De Vincenzi, H. Y. Jia, C. Bacci, S. Mastroianni, F. Budano, Jianbing Zhang, H. W. Wang, B. Biondo, G.C. Yu, X. D. Sheng, X.F. Gao, A. K. Calabrese Melcarne, G. Marsella, L. Zhang, P. Bernardini, Xc Yang, Giancarlo Cusumano, G. Liguori, M. He, Q. Y. Yang, Paolo Camarri, Eva Reali, N. Cheng, Danzengluobu, X. H. Ding, Roberto Cardarelli, Y. H. Tan, P. Creti, J. K. K. Liu, S. Catalanotti, M. Panareo, E. Rossi, B. Bartoli, THE ARGO YBJ, Collaboration, G., Aielli, R., Assiro, C., Bacci, B., Bartoli, P., Bernardini, X. J., Bi, B., Biondo, C., Bleve, S., Bricola, F., Budano, Bussino, Severino Angelo Maria, A. K., CALABRESE MELCARNE, P., Camarri, D., Campana, Z., Cao, R., Cardarelli, S., Catalanotti, S., Cavaliere, P., Celio, N., Cheng, P., Creti, G., Cusumano, B. Z., Dai, G., DALI STAITI, Danzengluobu, B., Daquino, E., DE MARINIS, I., DE MITRI, B., DETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, K., Fratini, X. F., Gao, Q. B., Gou, H. H., He, M., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, G., Mancarella, A., Mangano, Mari, Stefano Maria, G., Marsella, D., Martello, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, M., Panareo, L., Perrone, C., Pino, C., Pinto, P., Pistilli, E., Rossi, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, H., Wang, Yonggang, Wang, Yungang, Wang, C. Y., Wu, H. R., Wu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, N. J., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhol, F. R., Zhu, Q. Q., Zhu, G., Aiellia, R., Assirob, C., Baccic, Bartoli, Bruno, P., Bernardinib, X. J., Bie, B., Biondof, C., Bleveb, S., Bricolag, F., Budanoc, S., Bussinoc, A. K., CALABRESE MELCARNEB, P., Camarria, D., Campanad, Z., Caoe, R., Cardarellia, Catalanotti, Sergio, Cavaliere, Sergio, M., CAVALLI SFORZAC, P., Celioc, N., Chenge, P., Cretib, G., Cusumanof, B. Z., Daih, G., DAL STAITII, Danzengluobuj, B., Daquinod, E., DE MARINISC, I., DE MITRIB, D'ETTORRE PIAZZOLI, Benedetto, M., DE VINCENZIC, DI GIROLAMO, Tristano, X. H., Dingj, G., DI SCIASCIOD, C. F., Fengk, Zhaoyang, Fenge, Zhenyong, Fengl, K., Fratinic, X. F., Gaoh, Q. B., Goue, H. H., Hee, M., Hek, Haibing, Huj, Hongbo, Hue, Q., Huangl, Iacovacci, Michele, I., Jamesg, H. Y., Jial, Labacirenj, H. J., Lij, J. Y., Lik, B., Libertia, G., Liguorig, C. Q., Liuh, J., Liuh, H., Lue, G., Mancarellab, A., Manganof, S. M., Maric, G., Marsellab, D., Martellob, Mastroianni, Stefano, X. R., Mengj, J., Muh, L., Nicastrof, C. C., Ningj, M., Panareob, G., Pellizzonic, L., Perroneb, C., Pinob, C., Pintob, P., Pistillic, E., Realia, Rossi, Elvira, Saggese, Luigi, P., Salvinig, R., Santonicoa, P. R., Shene, X. D., Shenge, F., Shie, C., Stanescuc, A., Surdob, Y. H., Tane, P., Vallaniam, S., Vernettom, H., Wange, Yonggang, Wangk, Yungang, Wange, C. Y., Wue, H. R., Wue, L., Xuek, H. T., Yangh, Q. Y., Yangh, X. C., Yangh, G. C., Yul, A. F., Yuanj, M., Zhae, H. M., Zhange, J. L., Zhange, L., Zhangh, N. J., Zhangk, P., Zhangh, X. Y., Zhangk, Y., Zhange, Zhaxisangzhuj, X. X., Zhoul, F. R., Zhue, Q. Q., Zhue, Aielli, G, Assiro, R, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Biondo, B, Bleve, C, Bricola, S, Budano, F, Melcarne, Akc, Camarri, P, Campana, D, Cao, Z, Cardarelli, R, Catalanotti, S, Cavaliere, S, Sforza, Mc, Celio, P, Cheng, N, Creti, P, Cusumano, G, Dai, Bz, Staiti, Gd, D'Aquino, B, De Marinis, E, De Mitri, I, Plazzoli, Bd, DE VINCENZI, Mario, Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng, Zy, Fratini, K, Gao, Xf, Gou, Qb, He, Hh, He, M, Hu, Hb, Huang, Q, Iacovacci, M, James, I, Jia, Hy, Li, Hj, Li, Jy, Liberti, B, Liguori, G, Liu, Cq, Liu, J, Lu, H, Mancarella, G, Mangano, A, Marsella, G, Martello, D, Mastrolanni, S, Meng, Xr, Mu, J, Nicastro, L, Ning, Cc, Panareo, M, Pellizzoni, G, Perrone, L, Pino, C, Pinto, C, Pistilli, P, Reali, E, Rossi, E, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Wang, H, Wang, Yg, Wu, Cy, Wu, Hr, Xue, L, Yang, Ht, Yang, Qy, Yang, Xc, Yu, Gc, Yuan, Af, Zha, M, Zhang, Hm, Zhang, Jl, Zhang, L, Zhang, Nj, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, Bernardini, Paolo, S., Bussino, A. K., Calabrese Melcarne, M., Cavalli Sforza, G., D’Alı' Staiti, B., D’Aquino, E., De Marini, DE MITRI, Ivan, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, G., Di Sciascio, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, Panareo, Marco, G., Pellizzoni, Perrone, Lorenzo, E., Reali, X. X., Zhou, R ASSIRO, C BACCI, B BARTOLI, P BERNARDINI, XJ BI, B BIONDO, C BLEVE, S BRICOLA, SBUDANO, S BUSSINO, AK CALABRESE MELCARNE, P CAMARRI, D CAMPANA, Z CAO, S CARDARELLI, S CATALANOTTI, S CAVALIERE, M CAVALLI SFORZA, P CELIO, N CHENG, P CRETI, G CUSUMANO, BZ DAI, D'ALI' STAITI G, DANZENGLUOBU, B DAQUINO, E DE MARINIS, I DE MITRI, B DETTORRE PIAZZOLI, M DE VINCENZI, T DI GIROLAMO, XH DING, G DI SCIASCIO, CFFENG, Z FENG, K FRATINI, XF GAO, QB GOU, HH HE, M HE, H HU, HHU, Q HUANG, M IACOVACCI, I JAMES, HY JIA, LABACIREN, HJ LI, JY LI, B LIBERTI, G LIGUORI, CQ LIU, J LIU, H LU, G MANCARELLA, A MANGANO, SM MARI, G MARSELLA, D MARTELLO, S MASTROIANNI, XR MENG, J MU, L NICASTRO, CC NING, M PANAREO, G PELLIZZONI, L PERRONE, C PINO, C PINTO, P PISTILLI, E REALI, E ROSSI, L SAGGESE, P SALVINI, R SANTONICO, PR SHEN, XD SHENG, F SHI, C STANESCU, A SURDO, XY TAN, P VALLANIA, S VERNETTO, H WANG, Y WANG, CY WU, HR WU, L XUE, HT YANG, QY YANG, XC YANG, GCYU, AF YUAN, M ZHA, HM ZHANG, JL ZHANG, L ZHANG, NJ ZHANG, P ZHANG, XYZHANG, Y ZHANG, ZHAXISANGZOU, XX ZHOU, FR ZHOU, and QQ ZHOU

Subjects
Physics, Nuclear and High Energy Physics, Rivelatori a ga, Physics::Instrumentation and Detectors, Cosmic rays detector, Astrophysics::High Energy Astrophysical Phenomena, Detector, Settore FIS/01 - Fisica Sperimentale, Resistive Plate Chambers, Cosmic Rays, Extended Air Showers, Camere a piani resistivi, Rivelatori di raggi cosmici, Settore AGR/03 - Arboricoltura Generale E Coltivazioni Arboree, Gas detector, Range (statistics), RPC, Granularity, Particle density, Instrumentation, Argo, Remote sensing
Abstract

The layout of the RPCs, used in the Argo-YBJ experiment to image with a high space-time granularity the atmospheric shower, is described in this paper. The detector has been assembled to provide both digital and analog informations in order to cover a wide particle density range with a time accuracy of 1 ns. The experimental results obtained operating the chambers in streamer mode at sea level with a standard gas mixture are presented. (c) 2006 Elsevier B.V. All rights reserved.

Published
2006

510. High Altitude test of RPCs for the ARGO-YBJ experiment

Author

THE ARGO YBJ COLLABORATION, G. AIELLI, R. ASSIRO, C. BACCI, B. BARTOLI, P. BERNARDINI, X. J. BI, B. BIONDO, C. BLEVE, S. BRICOLA, F. BUDANO, BUSSINO, Severino Angelo Maria, A. K. CALABRESE MELCARNE, P. CAMARRI, D. CAMPANA, Z. CAO, R. CARDARELLI, S. CATALANOTTI, S. CAVALIERE, P. CELIO, N. CHENG, P. CRETI, G. CUSUMANO, B. Z. DAI, G. DALI STAITI, DANZENGLUOBU, B. DAQUINO, E. DE MARINIS, I. DE MITRI, B. DETTORRE PIAZZOLI, M. DE VINCENZI, T. DI GIROLAMO, X. H. DING, G. DI SCIASCIO, C. F. FENG, ZHAOYANG FENG, ZHENYONG FENG, K. FRATINI, X. F. GAO, Q. B. GOU, H. H. HE, M. HE, HAIBING HU, HONGBO HU, Q. HUANG, M. IACOVACCI, I. JAMES, H. Y. JIA, LABACIREN, H. J. LI, J. Y. LI, B. LIBERTI, G. LIGUORI, C. Q. LIU, J. LIU, H. LU, G. MANCARELLA, A. MANGANO, G. MARSELLA, D. MARTELLO, S. MASTROIANNI, X. R. MENG, J. MU, L. NICASTRO, C. C. NING, M. PANAREO, L. PERRONE, C. PINO, C. PINTO, P. PISTILLI, E. ROSSI, L. SAGGESE, P. SALVINI, R. SANTONICO, P. R. SHEN, X. D. SHENG, F. SHI, C. STANESCU, A. SURDO, Y. H. TAN, P. VALLANIA, S. VERNETTO, H. WANG, YONGGANG WANG, YUNGANG WANG, C. Y. WU, H. R. WU, L. XUE, H. T. YANG, Q. Y. YANG, X. C. YANG, G. C. YU, A. F. YUAN, M. ZHA, H. M. ZHANG, J. L. ZHANG, L. ZHANG, N. J. ZHANG, P. ZHANG, X. Y. ZHANG, Y. ZHANG, ZHAXISANGZHU, X. X. ZHOL, F. R. ZHU, Q. Q. ZHU, MARI, Stefano Maria, Bacci, C., Bao, K. Z., Barone, F., Bartoli, B., Bernardini, Paolo, Buonomo, R., Bussino, S., Calloni, E., Cao, B. Y., Cardarelli, R., Catalanotti, S., Cavaliere, A., Cesaroni, F., Creti, P., Danzengluobu, D'ETTORRE PIAZZOLI, B., DE VINCENZI, M., DI GIROLAMO, T., DI SCIASCIO, G., Feng, Z. Y., Fu, Y., Gao, X. Y., Geng, Q. X., Guo, H. W., H. H., He, He, M., Huang, Q., Iacovacci, M., Iucci, N., Jai, H. Y., Kong, F. M., Kuang, H. H., Labaciren, Li, B., J. Y., Li, Liu, Z. Q., Lu, H., X. H., Ma, Mancarella, G., Mari, S. M., Marsella, Giovanni, Martello, Daniele, Mei, D. M., Meng, X. R., Milano, L., Morselli, A., Mu, J., Panareo, Marco, Parisi, M., Pellizzoni, G., Peng, Z. R., Pinto, C., Pistilli, P., Reali, E., Santonico, R., Severino, G., Shen, P. R., Stanescu, C., Su, J., Sun, L. R., Sun, S. C., Surdo, A., Tan, Y. H., Vernetto, S., Wang, C. R., Wang, H., Wang, H. Y., Wei, Y. N., Yang, H. T., Yao, Q. K., G. C., Yu, Yue, X. D., Yuan, A. F., Zhang, H. M., Zhang, J. L., Zhang, N. J., Zhang, T. J., Zhang, X. Y., Zhaxisangzhu, Zhaxiciren, Zhu, Q. Q., Bernardini, P., Calloni, Enrico, Cesaroni, CARLO FRANCESCO, Danzengluobu, M., D'Ettorre, Piazzoli, Benedetto, De Vincenzi, M., Girolamo, Di, DI GIROLAMO, Tristano, Di Sciascio, G., He, Chaojie, Huang, Weiping, Iacovacci, Michele, Marsella, G., Martello, D., Panareo, M., Zhaxisangzhu, Zhaxiciren, Q. Q. Zhu, THE ARGO YBJ, Collaboration, G., Aielli, R., Assiro, C., Bacci, B., Bartoli, P., Bernardini, X. J., Bi, B., Biondo, C., Bleve, S., Bricola, F., Budano, Bussino, Severino Angelo Maria, A. K., CALABRESE MELCARNE, P., Camarri, D., Campana, Z., Cao, R., Cardarelli, S., Catalanotti, S., Cavaliere, P., Celio, N., Cheng, P., Creti, G., Cusumano, B. Z., Dai, G., DALI STAITI, B., Daquino, E., DE MARINIS, I., DE MITRI, B., DETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, K., Fratini, X. F., Gao, Q. B., Gou, M., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, G., Mancarella, A., Mangano, Mari, Stefano Maria, G., Marsella, D., Martello, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, M., Panareo, L., Perrone, C., Pino, C., Pinto, P., Pistilli, E., Rossi, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, H., Wang, Yonggang, Wang, Yungang, Wang, C. Y., Wu, H. R., Wu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, N. J., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhol, F. R., Zhu, and Q. Q., Zhu

Subjects
Physics, Nuclear and High Energy Physics, ARGO-YBJ, Astronomy, Cosmic ray, Gamma-ray astronomy, Astrophysics, Extensive air-shower, Effects of high altitude on humans, Electrode impedance, gamma-ray astronomy, RPCs, High mountain, High Energy Physics - Experiment, Ionization chamber, Instrumentation, Argo
Abstract

A 50 m**2 RPC carpet was operated at the YangBaJing Cosmic Ray Laboratory (Tibet) located 4300 m a.s.l. The performance of RPCs in detecting Extensive Air Showers was studied. Efficiency and time resolution measurements at the pressure and temperature conditions typical of high mountain laboratories, are reported., Comment: 16 pages, 10 figures, submitted to Nucl. Instr. Meth

Published
2000

511. Results from the analysis of data collected with a 50m(2) RPC carpet at YangBaJing

Author

THE ARGO YBJ COLLABORATION, G. AIELLI, R. ASSIRO, C. BACCI, B. BARTOLI, P. BERNARDINI, X. J. BI, B. BIONDO, C. BLEVE, S. BRICOLA, F. BUDANO, BUSSINO, Severino Angelo Maria, A. K. CALABRESE MELCARNE, P. CAMARRI, D. CAMPANA, Z. CAO, R. CARDARELLI, S. CATALANOTTI, S. CAVALIERE, P. CELIO, N. CHENG, P. CRETI, G. CUSUMANO, B. Z. DAI, G. DALI STAITI, DANZENGLUOBU, B. DAQUINO, E. DE MARINIS, I. DE MITRI, B. DETTORRE PIAZZOLI, M. DE VINCENZI, T. DI GIROLAMO, X. H. DING, G. DI SCIASCIO, C. F. FENG, ZHAOYANG FENG, ZHENYONG FENG, K. FRATINI, X. F. GAO, Q. B. GOU, H. H. HE, M. HE, HAIBING HU, HONGBO HU, Q. HUANG, M. IACOVACCI, I. JAMES, H. Y. JIA, LABACIREN, H. J. LI, J. Y. LI, B. LIBERTI, G. LIGUORI, C. Q. LIU, J. LIU, H. LU, G. MANCARELLA, A. MANGANO, G. MARSELLA, D. MARTELLO, S. MASTROIANNI, X. R. MENG, J. MU, L. NICASTRO, C. C. NING, M. PANAREO, L. PERRONE, C. PINO, C. PINTO, P. PISTILLI, E. ROSSI, L. SAGGESE, P. SALVINI, R. SANTONICO, P. R. SHEN, X. D. SHENG, F. SHI, C. STANESCU, A. SURDO, Y. H. TAN, P. VALLANIA, S. VERNETTO, H. WANG, YONGGANG WANG, YUNGANG WANG, C. Y. WU, H. R. WU, L. XUE, H. T. YANG, Q. Y. YANG, X. C. YANG, G. C. YU, A. F. YUAN, M. ZHA, H. M. ZHANG, J. L. ZHANG, L. ZHANG, N. J. ZHANG, P. ZHANG, X. Y. ZHANG, Y. ZHANG, ZHAXISANGZHU, X. X. ZHOL, F. R. ZHU, Q. Q. ZHU, MARI, Stefano Maria, Bacci, C., Bao, K. Z., Barone, F., Bartoli, B., Bernardini, P., Bussino, S., Calloni, E., Cao, B. Y., Cardarelli, R., Catalanotti, S., Cavaliere, A., Cavaliere, S., Cesaroni, F., Creti, P., Danzengluobu, D'ETTORRE PIAZZOLI, B., DE VINCENZI, M., DI GIROLAMO, T., DI SCIASCIO, G., Feng, Z. Y., Fu, Y., Gao, X. Y., Geng, Q. X., Guo, H. W., H. H., He, He, M., Huang, Q., Iacovacci, M., Iucci, N., Jai, H. Y., Kong, F. M., Kuang, H. H., Labaciren, Li, B., J. Y., Li, Liu, Z. Q., Lu, H., X. H., Ma, Mancarella, G., Mari, S. M., Marsella, Giovanni, Martello, Daniele, Mei, D. M., Meng, X. R., Milano, L., Mu, J., Panareo, Marco, Pellizzoni, G., Peng, Z. R., Pinto, C., Pistilli, P., Reali, E., Santonico, R., Sbarra, C., Shen, P. R., Stanescu, C., Su, J., Sun, L. R., Sun, S. C., Surdo, A., Tan, Y. H., Vernetto, S., Wang, C. R., Wang, H., Wang, H. Y., Wei, Y. N., Yang, H. T., Yao, Q. K., G. C., Yu, Yue, X. D., Yuan, A. F., Zhang, H. M., Zhang, J. L., Zhang, N. J., Zhang, T. J., Zhang, X. Y., Zhaxisangzhu, Zhaxiciren, Zhu, Q. Q., C., Bacci, K. Z., Bao, F., Barone, Bartoli, Bruno, P., Bernardini, S., Bussino, Calloni, Enrico, B. Y., Cao, R., Cardarelli, Catalanotti, Sergio, A., Cavaliere, S., Cavaliere, F., Cesaroni, P., Creti, D'ETTORRE PIAZZOLI, Benedetto, M. D., Vincenzi, DI GIROLAMO, Tristano, G. D., Sciascio, Z. Y., Feng, Y., Fu, X. Y., Gao, Q. X., Geng, H. W., Guo, M., He, Q., Huang, Iacovacci, Michele, N., Iucci, H. Y., Jai, F. M., Kong, H. H., Kuang, B., Li, Z. Q., Liu, H., Lu, G., Mancarella, S. M., Mari, G., Marsella, D., Martello, D. M., Mei, X. R., Meng, L., Milano, J., Mu, M., Panareo, C., Pellizzoni, Z. R., Peng, C., Pinto, P., Pistilli, E., Reali, R., Santonico, C., Sbarra, P. R., Shen, C., Stanescu, J., Su, L. R., Sun, S. C., Sun, A., Surdo, Y. H., Tan, S., Vernetto, C. R., Wang, H., Wang, H. Y., Wang, Y. N., Wei, H. T., Yang, Q. K., Yao, X. D., Yue, A. F., Yuan, H. M., Zhang, J. L., Zhang, N. J., Zhang, T. J., Zhang, X. Y., Zhang, Q. Q., Zhu, Piazzoli, B. D., Vincenzi, M. D., Girolamo, T. D., Sciascio, G. D., Mancarella, Giovanni, Pellizzoni, C., THE ARGO YBJ, Collaboration, G., Aielli, R., Assiro, B., Bartoli, X. J., Bi, B., Biondo, C., Bleve, S., Bricola, F., Budano, Bussino, Severino Angelo Maria, A. K., CALABRESE MELCARNE, P., Camarri, D., Campana, Z., Cao, S., Catalanotti, P., Celio, N., Cheng, G., Cusumano, B. Z., Dai, G., DALI STAITI, B., Daquino, E., DE MARINIS, I., DE MITRI, B., DETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, K., Fratini, X. F., Gao, Q. B., Gou, Haibing, Hu, Hongbo, Hu, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, A., Mangano, Mari, Stefano Maria, S., Mastroianni, L., Nicastro, C. C., Ning, L., Perrone, C., Pino, E., Rossi, L., Saggese, P., Salvini, X. D., Sheng, F., Shi, P., Vallania, Yonggang, Wang, Yungang, Wang, C. Y., Wu, H. R., Wu, L., Xue, Q. Y., Yang, X. C., Yang, M., Zha, L., Zhang, P., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhol, F. R., Zhu, Bacci, C, Bao, Kz, Barone, F, Bartoli, B, Bernardini, P, Calloni, E, Cao, By, Cardarelli, R, Catalanotti, S, Cavaliere, A, Cavaliere, S, Cesaroni, F, Creti, P, Piazzoli, Bd, De Vincenzi, M, Di Girolamo, T, Di Sciascio, G, Feng, Zy, Fu, Y, Gao, Xy, Geng, Qx, Guo, Hw, He, Hh, He, M, Huang, Q, Iacovacci, M, Iucci, N, Jai, Hy, Kong, Fm, Kuang, Hh, Li, B, Li, Jy, Liu, Zq, Lu, H, Ma, Xh, Mancarella, G, Marsella, G, Martello, D, Mei, Dm, Meng, Xr, Milano, L, Mu, J, Panareo, M, Pellizzoni, C, Peng, Zr, Pinto, C, Pistilli, P, Reali, E, Santonico, R, Sbarra, C, Shen, Pr, Stanescu, C, Su, J, Sun, Lr, Sun, Sc, Surdo, A, Tan, Yh, Vernetto, S, Wang, Cr, Wang, H, Wang, Hy, Wei, Yn, Yang, Ht, Yao, Qk, Yu, Gc, Yue, Xd, Yuan, Af, Zhang, Hm, Zhang, Jl, Zhang, Nj, Zhang, Tj, Zhang, Xy, and Zhu, Qq

Subjects
Physics, gamma ray detector, Nuclear and High Energy Physics, Shower, Air shower, Altitude, Meteorology, Data analysis, Gamma Ray Bursts, Effects of high altitude on humans, Instrumentation
Abstract

An RPC carpet covering similar to 10(4) m(2) (ARGO-YBJ experiment) will be installed in the YangBaJing Laboratory (Tibet, People's Republic of China) at an altitude of 4300 m a.s.l. A test-module of similar to 50 m(2) has been put in operation in this laboratory and about 10(6) air shower events have been collected. The RPC performance at high altitude and the carpet capability of reconstructing the shower features are presented. (C) 2000 Elsevier Science B.V. All rights reserved.

Published
2000

512. The extreme energy events experiment

Author

G. Serri, A. Scribano, L. Fabbri, Eugenio Scapparone, L. Votano, C. Ripoli, Rosario Nania, A. Zichichi, C. Avanzini, L. Galante, R. Paoletti, M. Selvi, E. Bossini, P. Galeotti, Giancarlo C. Righini, F. Coccetti, G. Piragino, R. Baldini Ferroli, C. Pinto, I. Gnesi, Corrado Cicalo, Francesco Noferini, A. Mulliri, M. Garbini, M. Battaglieri, Giuseppe Mandaglio, Francesco Riggi, Antonio Trifiro, A. Corvaglia, G. Gemme, G. Maron, C. Pellegrino, F. Carnesecchi, M. Panareo, E. Coccia, F. Nozzoli, S. Pisano, L. G. Batignani, M. C. Vistoli, G. Sartorelli, D. Hatzifotiadou, M. P. Panetta, Z. Liu, S. Grazzi, M. C. S. Williams, Luca Baldini, P. La Rocca, Marcello Abbrescia, D. De Gruttola, Mn Mazziotta, M. Rizzi, Luisa Cifarelli, M. Trimarchi, S. Boi, F. Palmonari, G. Terreni, S. De Pasquale, R. Zuyeuski, M. Taiuti, Marco Schioppa, S. Squarcia, L. Perasso, Cicalo, Corrado, Abbrescia, M., Avanzini, C., Baldini, L., Baldini Ferroli, R, G Batignani, L., Battaglieri, M., Boi, S., Bossini, E., Carnesecchi, F., Cifarelli, L., Coccetti, F., Coccia, E., Corvaglia, A., De Gruttola, D, De Pasquale, S, Fabbri, L., Galante, L., Galeotti, P., Garbini, M., Gemme, G., Gnesi, I., Grazzi, S., Hatzifotiadou, D., La Rocca, P, Liu, Z., Mandaglio, G., Maron, G., N Mazziotta, M., Mulliri, A., Nania, R., Noferini, F., Nozzoli, F., Palmonari, F., Panareo, M., P Panetta, M., Paoletti, R., Pellegrino, C., Perasso, L., Pinto, C., Piragino, G., Pisano, S., Riggi, F., C Righini, G., Ripoli, C., Rizzi, M., Sartorelli, G., Scapparone, E., Schioppa, M., Scribano, A., Selvi, M., Serri, G., Squarcia, S., Taiuti, M., Terreni, G., Trifir, A., Trimarchi, M., C Vistoli, M., Votano, L., C S Williams, M., Zichichi, A., and Zuyeuski, R.

Subjects
Physics, Cosmic ray, Extreme Energy Events, Air Showers, EAS, Muon, business.industry, Detector, Aerospace engineering, Tracking (particle physics), business, Image resolution, Stability (probability), Energy (signal processing), Fermi Gamma-ray Space Telescope, Term (time)
Abstract

The Extreme Energy Events experiment (EEE), a strategic project of Centro Fermi, aims to study Extensive Air Showers (EAS) with a network of Multigap Resistive Plate Chamber (MRPC) detectors, mainly installed in Italian high schools. The network presently counts 59 muon telescopes, each composed by three planes of MRPC. The total covered area is more than 3 x 10^5 km^2. Thanks to the tracking capabilities of these detectors, their time synchronization and the localization in town clusters, it is possible to study Air Showers and to investigate long distance correlations between them. Up to now 5 long data taking of several months each have been performed, starting in 2015 and simoultaneously involving from 30 to 50 telescopes. The study of EAS requires excellent performance in terms of time and spatial resolution, efficiency, tracking capability and long term stability. In this work, we report a description of the system, its performances and some of the main physics results obtained so far.

513. Eee project - students from all parts of peninsula collaborate to study cosmic rays

Author

A. Scribano, M. Panareo, L. Votano, C. Ripoli, W. Park, F. Coccetti, M. Taiuti, E. Bossini, Rosario Nania, G. Sartorelli, C. Avanzini, M. Selvi, M. C. Vistoli, M. Trimarchi, S. Serci, A. Chiavassa, M. C. S. Williams, S. Grazzi, S. Squarcia, Antonio Trifiro, Francesco Noferini, S. Miozzi, G. Maron, G. Batignani, G. Piragino, Antonino Zichichi, S. Pisano, S. De Pasquale, O. Maragoto Rodriguez, S. Boi, R. Baldini Ferroli, P. La Rocca, R. Paoletti, G. Terreni, M. P. Panetta, M. Garbini, I. Gnesi, D. De Gruttola, M. Battaglieri, A. Corvaglia, Eugenio Scapparone, G. Gemme, R. Zuyeuski, P. Galeotti, M. N. Mazziotta, M. Schioppa, Fabrizio Giulio Luca Pilo, L. Perasso, C. Gustavino, Francesco Riggi, F. Carnesecchi, E. Coccia, L. Zheng, C. Cicalo, Giancarlo C. Righini, F. L. Fabbri, Giuseppe Mandaglio, Frolov, F. Nozzoli, Luca Baldini, Marcello Abbrescia, M. Rizzi, Luisa Cifarelli, D. Hatzifotiadou, F. Palmonari, Grazzi, Stefano, Abbrescia, M., Avanzini, C., Baldini, L., Ferroli, R. Baldini, Batignani, G., Battaglieri, M., Boi, S., Bossini, E., Carnesecchi, F., Chiavassa, A., Cicalo, C., Cifarelli, L., Coccetti, F., Coccia, E., Corvaglia, A., Gruttola, D. De, Pasquale, S. De, L. Fabbri, F., Frolov, V., Galeotti, P., Garbini, M., Gemme, G., Gnesi, I., Gustavino, C., Hatzifotiadou, D., Rocca, P. La, Mandaglio, G., Rodriguez, O. Maragoto, Maron, G., Mazziottai, Mario Nicola, Miozzi, S., Nania, R., Noferini, F., Nozzoli, F., Palmonari, F., Panareo, M., Panetta, M. P., Paoletti, R., Park, W., Perasso, L., Pilo, F., Piragino, G., Pisano, S., Riggi, F., Righini, G. C., Ripoli, C., Rizzi, M., Sartorelli, G., Scapparone, E., Schioppa, Marco, Scribano, A., Selvi, M., Serci, S., Squarcia, S., Taiuti, M., Terreni, G., Trifirò, A., Trimarchi, M., C. Vistoli, M., Votano, L., Williams, M. C. S., Zheng, L., Zichichi, A., and Zuyeuski, R.

Subjects
High energy, geography, Astrophysics and Astronomy, geography.geographical_feature_category, Multidisciplinary, biology, media_common.quotation_subject, Library science, biology.organism_classification, Newspaper, Cosmic rays, MRPC, Presentation, Peninsula, Christian ministry, Lampedusa, Citizenship, media_common
Abstract

Project Extreme Energy Events (EEE) – “La scienza nelle scuole” is an experiment dedicated to the study of high energy cosmic radiation, using detectors distributed over an area of more than half a million km2, from Geneva to Lampedusa. Data are taken simultaneously from about 50 telescopes. More than 50 billion particles have been registered up to now. Project was born in 2004 from an idea of Professor Antonino Zichichi, funded and operated by the Fermi Center in Rome in collaboration with CERN, INFN, and the Ministry of Education, with the aim to involve high school students in a real physics experiment. The Initiative has reached the goal of 100 participating educational institutes, with a support of 10-30 students per school. Half of these already hosts a detector, the others, waiting for a telescope, are involved in data taking and analysis together with twinned schools. The participation of students starts with the construction of the detectors at CERN, working with local researchers. After installation into school, they manage and monitor the operation of the telescope during the data taking, and intervene in case of failure. Students deepen their knowledge both about particle physics through targeted lessons and in specific areas of data analysis with dedicated "Masterclasses". Periodically they attend seminars, open also to the citizens and sometime highlighted in newspapers, and to annual meetings between all schools involved and the Centro Fermi researchers coordinating the project. Since November 2016, there are monthly videoconferences opened to schools; more than 50 schools are connected simultaneously! In these meetings, students are updated on the latest news of the project and present their activities to the entire collaboration. In my presentation, I will examine the different ways of involvement of young people in the project and its impact on education and citizenship.

514. The measuring systems of the wire tension for the MEG II Drift Chamber by means of the resonant frequency technique

Author

A.M. Baldini, H. Benmansour, G. Cavoto, F. Cei, M. Chiappini, G. Chiarello, C. Chiri, G. Cocciolo, A. Corvaglia, F. Cuna, M. Francesconi, L. Galli, F. Grancagnolo, M. Grassi, M. Meucci, A. Miccoli, D. Nicoló, M. Panareo, A. Papa, C. Pinto, F. Raffaelli, F. Renga, G. Signorelli, G.F. Tassielli, A. Venturini, B. Vitali, C. Voena, Baldini, A. M., Benmansour, H., Cavoto, G., Cei, F., Chiappini, M., Chiarello, G., Chiri, C., Cocciolo, G., Corvaglia, A., Cuna, F., Francesconi, M., Galli, L., Grancagnolo, F., Grassi, M., Meucci, M., Miccoli, A., Nicoló, D., Panareo, M., Papa, A., Pinto, C., Raffaelli, F., Renga, F., Signorelli, G., Tassielli, G. F., Venturini, A., Vitali, B., and Voena, C.

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, muon, drift chamber, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), charged lepton flavour violation, gas detector, Instrumentation, Drift Chambers, Drift Chambers, Resonance, Measurement of mechanical tension
Abstract

The ultra-low mass cylindrical drift chamber designed for the MEG II experiment is a challenging apparatus made of 1728 phi = 20 micron gold plated tungsten sense wires, 7680 phi = 40 micron and 2496 phi = 50 micron silver plated aluminum field wires. Because of electrostatic stability requirements all the wires have to be stretched at mechanical tensions of about 25, 19 and 29 g respectively which must be controlled at a level better than 0.5 g. This chamber is presently in acquisition, but during its construction about 100 field wires broke, because of chemical corrosion induced by the atmospheric humidity. On the basis of the experience gained with this chamber we decided to build a new one, equipped with a different type of wires less sensitive to corrosion. The choice of the new wire required a deep inspection of its characteristics and one of the main tools for doing this is a system for measuring the wire tension by means of the resonant frequency technique, which is described in this paper. The system forces the wires to oscillate by applying a sinusoidal signal at a known frequency, and then measures the variation of the capacitance between a wire and a common ground plane as a function of the external signal frequency. We present the details of the measuring system and the results obtained by scanning the mechanical tensions of two samples of MEG II cylindrical drift chamber wires and discuss the possible improvements of the experimental apparatus and of the measuring technique., Comment: Nineteen pages, thirteen figures, published on Nuclear Instruments and Methods A

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515. Observation of Rayleigh-Lamb waves generated by the 2022 Hunga-Tonga volcanic eruption with the POLA detectors at Ny-Ålesund.

Author

Abbrescia M, Avanzini C, Baldini L, Ferroli RB, Batignani G, Battaglieri M, Boi S, Bossini E, Carnesecchi F, Casula M, Cavazza D, Cicalò C, Cifarelli L, Coccetti F, Coccia E, Corvaglia A, Gruttola D, Pasquale S, Galante L, Garbini M, Gemme G, Gnesi I, Gramstad E, Grazzi S, Haland ES, Hatzifotiadou D, Rocca P, Liu Z, Lombardo L, Mandaglio G, Margotti A, Maron G, Mazziotta MN, Mazzola M, Mulliri A, Nania R, Noferini F, Nozzoli F, Ould-Saada F, Palmonari F, Panareo M, Panetta MP, Paoletti R, Parvis M, Pellegrino C, Perasso L, Pinazza O, Pinto C, Pisano S, Riggi F, Righini G, Ripoli C, Rizzi M, Sartorelli G, Scapparone E, Schioppa M, Scioli G, Scribano A, Selvi M, Taiuti M, Terreni G, Trifirò A, Trimarchi M, Viola AP, Vistoli C, Votano L, Williams MCS, Zichichi A, and Zuyeuski R

Abstract

The eruption of the Hunga-Tonga volcano in the South Pacific Ocean on January 15, 2022, at about 4:15 UTC, generated a violent explosion, which created atmospheric pressure disturbances in the form of Rayleigh-Lamb waves detected all over the globe. Here we discuss the observation of the Hunga-Tonga shock-wave performed at the Ny-Ålesund Research Station on the Spitsbergen island, by the detectors of the PolarquEEEst experiment and their ancillary sensors. Online pressure data as well as the results of dedicated offline analysis are presented and discussed in details. Results include wave arrival times, wave amplitude measurements and wave velocity calculation. We observed five passages of the shock wave with a significance larger than 3 [Formula: see text] and an amplitude up to 1 hPa. The average propagation velocity resulted to be (308 ± 0.6) m/s. Possible effects of the atmospheric pressure variation associated with the shock-wave multiple passages on the cosmic-ray rate at ground level are also investigated. We did not find any significant evidence of this effect., (© 2022. The Author(s).)

Published
2022
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516. New constraint on the existence of the μ+ → e+ γ decay.

Author

Adam J, Bai X, Baldini AM, Baracchini E, Bemporad C, Boca G, Cattaneo PW, Cavoto G, Cei F, Cerri C, de Bari A, De Gerone M, Doke T, Dussoni S, Egger J, Fujii Y, Galli L, Gatti F, Golden B, Grassi M, Graziosi A, Grigoriev DN, Haruyama T, Hildebrandt M, Hisamatsu Y, Ignatov F, Iwamoto T, Kaneko D, Kettle PR, Khazin BI, Khomotov N, Kiselev O, Korenchenko A, Kravchuk N, Lim G, Maki A, Mihara S, Molzon W, Mori T, Mzavia D, Nardò R, Natori H, Nicolò D, Nishiguchi H, Nishimura Y, Ootani W, Panareo M, Papa A, Piredda G, Popov A, Renga F, Ripiccini E, Ritt S, Rossella M, Sawada R, Sergiampietri F, Signorelli G, Suzuki S, Tenchini F, Topchyan C, Uchiyama Y, Voena C, Xiao F, Yamada S, Yamamoto A, Yamashita S, You Z, Yudin YV, and Zanello D

Abstract

The analysis of a combined data set, totaling 3.6 × 10(14) stopped muons on target, in the search for the lepton flavor violating decay μ(+) → e(+)γ is presented. The data collected by the MEG experiment at the Paul Scherrer Institut show no excess of events compared to background expectations and yield a new upper limit on the branching ratio of this decay of 5.7 × 10(-13) (90% confidence level). This represents a four times more stringent limit than the previous world best limit set by MEG.

Published
2013
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517. New limit on the lepton-flavor-violating decay μ+→e+γ.

Author

Adam J, Bai X, Baldini AM, Baracchini E, Bemporad C, Boca G, Cattaneo PW, Cavoto G, Cei F, Cerri C, de Bari A, De Gerone M, Doke T, Dussoni S, Egger J, Fratini K, Fujii Y, Galli L, Gallucci G, Gatti F, Golden B, Grassi M, Grigoriev DN, Haruyama T, Hildebrandt M, Hisamatsu Y, Ignatov F, Iwamoto T, Kettle PR, Khazin BI, Kiselev O, Korenchenko A, Kravchuk N, Maki A, Mihara S, Molzon W, Mori T, Mzavia D, Natori H, Nicolò D, Nishiguchi H, Nishimura Y, Ootani W, Panareo M, Papa A, Pazzi R, Piredda G, Popov A, Renga F, Ritt S, Rossella M, Sawada R, Sergiampietri F, Signorelli G, Suzuki S, Tenchini F, Topchyan C, Uchiyama Y, Valle R, Voena C, Xiao F, Yamada S, Yamamoto A, Yamashita S, Yudin YV, and Zanello D

Abstract

We present a new result based on an analysis of the data collected by the MEG detector at the Paul Scherrer Institut in 2009 and 2010, in search of the lepton-flavor-violating decay μ(+)e(+)γ. The likelihood analysis of the combined data sample, which corresponds to a total of 1.8×10(14) muon decays, gives a 90% C.L. upper limit of 2.4×10(-12) on the branching ratio of the μ(+)→e(+)γ decay, constituting the most stringent limit on the existence of this decay to date., (© 2011 American Physical Society)

Published
2011
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518. Search for the Flavor Changing Neutral Current Decay D0--> micro+ micro- in 800 GeV Proton-Silicon Interactions.

Author

Alexopoulos T, Antoniazzi L, Arenton M, Ballagh HC, Bingham H, Blankman A, Block M, Boden A, Bonomi G, Borodin SV, Budagov J, Cao ZL, Cataldi G, Chen TY, Clark K, Cline D, Conetti S, Cooper M, Corti G, Cox B, Creti P, Dukes EC, Durandet C, Elia V V, Erwin AR, Evangelista E, Fortney L, Golovatyuk V V, Gorini E, Grancagnolo F, Hagan-Ingram K, Haire M, Hanlet P, He M, Introzzi G, Jenkins M, Jennings J, Judd D, Kononenko W, Kowald W, Lau K, Lawry T, Ledovskoy A, Liguori G, Lys J, Mazur PO, McManus A, Misawa S, Mo G, Murphy CT, Nelson K, Panareo M, Pogosian V V, Ramachandran S, Recagni M, Rhoades J, Segal J, Selove W, Smith RP, Spiegel L, Sun JG, Tokar S, Torre P, and Trischuk J

Published
1996
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