1.
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Unified Monitoring Architecture for IT and grid services
/ Aimar, A (CERN) ; Aguado Corman, A (CERN) ; Andrade, P (CERN) ; Belov, S (Dubna, JINR) ; Delgado Fernandez, J (CERN) ; Garrido Bear, B (CERN) ; Georgiou, M (CERN) ; Karavakis, E (CERN) ; Magnoni, L (CERN) ; Rama Ballesteros, R (CERN) et al.
This paper provides a detailed overview of the Unified Monitoring Architecture (UMA) that aims at merging the monitoring of the CERN IT data centres and the WLCG monitoring using common and widely-adopted open source technologies such as Flume, Elasticsearch, Hadoop, Spark, Kibana, Grafana and Zeppelin. It provides insights and details on the lessons learned, explaining the work performed in order to monitor the CERN IT data centres and the WLCG computing activities such as the job processing, data access and transfers, and the status of sites and services..
2017 - 7 p.
- Published in : J. Phys.: Conf. Ser. 898 (2017) 092033
Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.092033
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2.
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The AEgIS Experiment
/ Knecht, A (CERN) ; Aghion, S (Milan Polytechnic) ; Ahlen, O (CERN) ; Amsler, C (Bern U., LHEP) ; Ariga, A (Bern U., LHEP) ; Ariga, T (Bern U., LHEP) ; Belov, A S (Moscow, INR) ; Bonomi, G (INFM, Brescia ; INFN, Pavia) ; Bräunig, P (Kirchhoff Inst. Phys.) ; Bremer, J (CERN) et al.
The AEgIS experiment aims at performing the first test of the Weak Equivalence Principle of General Relativity in the antimatter sector by measuring the gravitational acceleration acting on a beam of cold antihydrogen to a precision of 1%. The installation of the apparatus is making good progress and large parts were taken into operation. [...]
2014 - 11 p.
- Published in : Hyperfine Interact. 228 (2014) 121-131
In : 11th International Conference on Low Energy Antiproton Physics, Uppsala, Sweden, 10 - 15 Jun 2013, pp.121-131
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3.
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Measuring the gravitational free-fall of antihydrogen
/ Storey, J (Bern U., LHEP) ; Aghion, S (Milan Polytechnic ; INFN, Milan) ; Ahlen, O (CERN) ; Amsler, C (Bern U., LHEP) ; Ariga, A (Bern U., LHEP) ; Ariga, T (Bern U., LHEP) ; Belov, A S (Moscow, INR) ; Bonomi, G (INFM, Brescia ; INFN, Pavia) ; Bräunig, P (Kirchhoff Inst. Phys.) ; Bremer, J (CERN) et al.
Antihydrogen holds the promise to test, for the first time, the universality of free-fall with a system composed entirely of antiparticles. The AEgIS experiment at CERN’s antiproton decelerator aims to measure the gravitational interaction between matter and antimatter by measuring the deflection of a beam of antihydrogen in the Earths gravitational field ( ¯¯¯g ). [...]
2014 - 7 p.
- Published in : Hyperfine Interact. 228 (2014) 151-157
In : 11th International Conference on Low Energy Antiproton Physics, Uppsala, Sweden, 10 - 15 Jun 2013, pp.151-157
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4.
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Positron bunching and electrostatic transport system for the production and emission of dense positronium clouds into vacuum
/ Aghion, S (INFN, Milan ; Milan Polytechnic) ; Amsler, C (Bern U., LHEP ; U. Bern, AEC) ; Ariga, A (Bern U., LHEP ; U. Bern, AEC) ; Ariga, T (Bern U., LHEP ; U. Bern, AEC) ; Belov, A S (Moscow, INR) ; Bonomi, G (INFN, Pavia ; U. Brescia) ; Bräunig, P (Kirchhoff Inst. Phys.) ; Bremer, J (CERN) ; Brusa, R S (TIFPA-INFN, Trento ; Trento U.) ; Cabaret, L (Orsay ; Cachan, Ecole Normale Superieure ; U. Paris-Saclay, Orsay) et al.
/AEgIS
We describe a system designed to re-bunch positron pulses delivered by an accumulator supplied by a positron source and a Surko-trap. Positron pulses from the accumulator are magnetically guided in a 0.085 T field and are injected into a region free of magnetic fields through a μ -metal field terminator. [...]
2015 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 362 (2015) 86-92
Elsevier Open Access article: PDF;
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5.
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Development of nuclear emulsions operating in vacuum for the AEgIS experiment
/ Scampoli, P (Bern U., LHEP ; Naples U.) ; Aghion, S (Milan Polytechnic ; INFN, Milan) ; Ahlen, O (CERN) ; Amsler, C (Bern U., LHEP) ; Ariga, A (Bern U., LHEP) ; Ariga, T (Bern U., LHEP) ; Belov, A S (Moscow, INR) ; Berggren, K (CERN) ; Bonomi, G (INFM, Brescia ; INFN, Pavia) ; Bräunig, P (Kirchhoff Inst. Phys.) et al.
/AEgIS
For the first time the AEgIS (Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy) experiment will measure the Earth's local gravitational acceleration g on antimatter through the evaluation of the vertical displacement of an antihydrogen horizontal beam. This will be a model independent test of the Weak Equivalence Principle at the base of the general relativity. [...]
2014
- Published in : JINST 9 (2014) C01061
Fulltext: PDF;
In : 13th Topical Seminar on Innovative Particle and Radiation Detectors, Sienna, Italy, 7 - 10 Oct 2013, pp.C01061
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6.
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Comparison of Planar and 3D Silicon Pixel Sensors Used for Detection of Low Energy Antiprotons
/ Gligorova, A (Bergen U.) ; Aghion, S (Milan Polytechnic ; INFN, Milan) ; Belov, A S (Moscow, INR) ; Bonomi, G (Brescia U. ; INFN, Pavia) ; Bräunig, P (Kirchhoff Inst. Phys.) ; Bremer, Jorg (CERN) ; Brusa, R S (TIFPA-INFN, Trento ; Trento U.) ; Cabaret, L (Orsay) ; Caccia, M (Insubria U., Como) ; Caravita, R (INFN, Milan ; Milan U.) et al.
The principal aim of the AEgIS experiment at CERN is to measure the acceleration of antihydrogen due to Earth's gravitational field. This would be a test of the Weak Equivalence Principle, which states that all bodies fall with the same acceleration independently of their mass and composition. [...]
2014 - 7 p.
- Published in : IEEE Trans. Nucl. Sci. 61 (2014) 3747-3753
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7.
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Processing of the WLCG monitoring data using NoSQL
/ Andreeva, J (CERN) ; Beche, A (CERN) ; Belov, S ; Dzhunov, I ; Kadochnikov, I ; Karavakis, E (CERN) ; Saiz, P (CERN) ; Schovancova, J ; Tuckett, D (CERN)
The Worldwide LHC Computing Grid (WLCG) today includes more than 150 computing centres where more than 2 million jobs are being executed daily and petabytes of data are transferred between sites. Monitoring the computing activities of the LHC experiments, over such a huge heterogeneous infrastructure, is extremely demanding in terms of computation, performance and reliability. [...]
2014 - 7 p.
- Published in : J. Phys.: Conf. Ser. 513 (2014) 032048
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.032048
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8.
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WLCG Transfers Dashboard: a Unified Monitoring Tool for Heterogeneous Data Transfers
/ Andreeva, J (CERN) ; Beche, A (CERN) ; Belov, S ; Kadochnikov, I ; Saiz, P (CERN) ; Tuckett, D (CERN)
The Worldwide LHC Computing Grid provides resources for the four main virtual organizations. Along with data processing, data distribution is the key computing activity on the WLCG infrastructure. [...]
2014 - 5 p.
- Published in : J. Phys.: Conf. Ser. 513 (2014) 032005
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.032005
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9.
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Monitoring of large-scale federated data storage: XRootD and beyond
/ Andreeva, J (CERN) ; Beche, A (CERN) ; Belov, S ; Arias, D Diguez (CERN) ; Giordano, D (CERN) ; Oleynik, D ; Petrosyan, A ; Saiz, P (CERN) ; Tadel, M ; Tuckett, D (CERN) et al.
The computing models of the LHC experiments are gradually moving from hierarchical data models with centrally managed data pre-placement towards federated storage which provides seamless access to data files independently of their location and dramatically improve recovery due to fail-over mechanisms. Construction of the data federations and understanding the impact of the new approach to data management on user analysis requires complete and detailed monitoring. [...]
2014 - 5 p.
- Published in : J. Phys.: Conf. Ser. 513 (2014) 032004
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.032004
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10.
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Measuring GBAR with emulsion detector
/ Ariga, T (Milan Polytechnic) ; Aghion, S (Milan Polytechnic) ; Ahlen, O (CERN) ; Amsler, C (Bern U., LHEP) ; Ariga, A (Bern U., LHEP) ; Belov, A S (Moscow, INR) ; Berggren, K (CERN) ; Bonomi, G (INFM, Brescia) ; Bräunig, P (Kirchhoff Inst. Phys.) ; Bremer, J (CERN) et al.
2014 - 8 p.
- Published in : Int. J. Mod. Phys.: Conf. Ser. 30 (2014) 1460268
External links: Fulltext; Fulltext
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