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First operational experience of the upgraded cryogenic infrastructure of the vertical magnet test facility in the SM18 hall, including HFM and cluster D test stations. / Benda, V (CERN) ; Lees, A (CERN) ; Pirotte, O (CERN) ; Craen, A Vande (CERN) ; Pezzetti, M (CERN) ; Lamboy, J P (CERN) ; Lefebvre, V (CERN) ; Bajko, M (CERN) ; Giloux, C (CERN)
As part of the R&D; program for HL-LHC, the future upgrade of the Large Hadron Collider (LHC), the vertical magnet test facility in the SM18 cryogenic test hall at CERN has seen significant development. Since the installation of HFM and Cluster D cryogenic test stations in 2017, the facility is comprised of five vertical test cryostats of various sizes operating at either 1.9 K or 4.2 K. [...]
IOP, 2019 - 6 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 502 (2019) 012126 Fulltext: ed5b7a2236d08af6573d0255c0581521 - PDF; 10.1088_1757-899X_502_1_012126 - PDF;
In : 27th International Cryogenic Engineering Conference - International Cryogenic Materials Conference 2018, Oxford, United Kingdom, 3 - 7 Sep 2018, pp.012126
State of the art and challenges in measurements and transducers for cryogenic monitoring / Arpaia, P (CERN ; Naples U.) ; De Vito, L (CERN ; Sannio U.) ; Pezzetti, M (CERN) ; Picariello, F (Sannio U.) ; Serio, L (CERN)
Mainstreams in research on measurement systems for cryogenic process monitoring are reviewed with the aim of defining key current trends and possible future evolutions. At this aim, research mainstreams are classified according to the measurand: liquid level, flow rate, and pressure. [...]
2018 - 14 p. - Published in : Measurement 124 (2018) 1-14
Fault detection on fluid machinery using Hidden Markov Models / Arpaia, P (Naples U.) ; Cesaro, U (Naples U. ; Picardie U.) ; Chadli, M (Picardie U.) ; Coppier, H (Picardie U.) ; De Vito, L (Sannio U.) ; Esposito, A (Polytech. Turin ; Unlisted, IT) ; Gargiulo, F (Naples U.) ; Pezzetti, M (CERN)
A fault detection method exploiting Hidden Markov Models (HMMs) is proposed for fluid machinery without adequate a priori information about faulty conditions. The method is trained only on data acquired during normal machine operation. [...]
2020 - 7 p. - Published in : Measurement 151 (2020) 107126
Sensor array calibration by a single reference in presence of measurand non-linear gradient / Arpaia, P (U. Naples (main)) ; Baccigalupi, C (CERN) ; Cesaro, U (U. Naples (main)) ; Chadli, M (Picardie U.) ; Coppier, H (Picardie U.) ; Pezzetti, M (CERN) ; Severino, G (U. Naples (main))
A calibration method exploiting a single external reference is proposed for sensors arrays in presence of a measurand non-linear gradient in the system under test. The calibration artifacts due to a non-uniform distribution of the measurand in the system under test, not detected by the single punctual reference sensor, are avoided. [...]
2018 - 4 p. - Published in : 10.1109/I2MTC.2018.8409713
In : IEEE International Instrumentation and Measurement Technology Conference, Houston, TX, USA, 14 - 17 May 2018, pp.8409713
M. Pezzetti / Pezzetti, Marco (speaker) (CERN)
State of the art of research on cryogenics monitoring
2018 - 1:20:00. Italo Gorini PhD Schools; Italo Gorini 2018 External links: Talk details; Event details In : Italo Gorini 2018
Outsourcing strategy and tendering methodology for the operation and maintenance of CERN’s cryogenic facilities / Serio, L (CERN) ; Bremer, J (CERN) ; Claudet, S (CERN) ; Delikaris, D (CERN) ; Ferlin, G (CERN) ; Ferrand, F (CERN) ; Pezzetti, M (CERN) ; Pirotte, O (CERN)
CERN operates and maintains the world largest cryogenic infrastructure ranging from ageing but well maintained installations feeding detectors, test facilities and general services, to the state-of-the-art cryogenic system serving the flagship LHC machine complex. A study was conducted and a methodology proposed to outsource to industry the operation and maintenance of the whole cryogenic infrastructure. [...]
2017 - 8 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 278 (2017) 012115 Fulltext: PDF;
In : 2017 Cryogenic Engineering Conference and International Cryogenic Materials Conference, Madison, WI, USA, 9 - 13 Jul 2017, pp.012115
Comparison of different cryogenic control strategies via simulation applied to a superconducting magnet test bench at CERN / Arpaia, P (CERN ; U. Naples (main)) ; Coppier, H (Amiens, ESIEE) ; De Paola, D (CERN) ; di Bernardo, M (U. Naples (main) ; U. Bristol (main)) ; Guarino, A (U. Naples (main)) ; Luz Pedemonte, B (Amiens, ESIEE) ; Pezzetti, M (CERN)
Industrial process controllers for cryogenic systems used in test facilities for superconducting magnets are typically PIDs, tuned by operational expertise according to users' requirements (covering cryogenic transients and associated thermo-mechanical constraints). In this paper, an alternative fully-automatic solution, equally based on PID controllers, is proposed. [...]
2017 - 8 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 278 (2017) 012080 Fulltext: PDF;
In : 2017 Cryogenic Engineering Conference and International Cryogenic Materials Conference, Madison, WI, USA, 9 - 13 Jul 2017, pp.012080
Overview of different control strategies for a typical cryogenic warm compressor station at CERN / Pezzetti, M (CERN) ; Garcia, C V M (Minas Gerais U.) ; Bradu, B (CERN) ; Rogez, E (CERN)
Helium cryogenic systems are extensively used at CERN under several configurations for accelerators and detectors. The Warm Compressor Station (WCS) is the primary component of the helium cryogenic systems. [...]
2017 - 8 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 278 (2017) 012079 Fulltext: PDF;
In : 2017 Cryogenic Engineering Conference and International Cryogenic Materials Conference, Madison, WI, USA, 9 - 13 Jul 2017, pp.012079
Automation of the software production process for multiple cryogenic control applications / Fluder, Czeslaw (CERN) ; Lefebvre, Victor (CERN) ; Pezzetti, Marco (CERN) ; Plutecki, Przemyslaw (AGH-UST, Cracow) ; Tovar-González, Antonio (CERN) ; Wolak, Tomasz (AGH-UST, Cracow)
The development of process control systems for the cryogenic infrastructure at CERN is based on an automatic software generation approach. The overall complexity of the systems, their frequent evolution as well as the extensive use of databases, repositories, commercial engineering software and CERN frameworks have led to further efforts towards improving the existing automation based software production methodology. [...]
2018 - 5 p. - Published in : 10.18429/JACoW-ICALEPCS2017-TUPHA006 Fulltext: PDF;
In : International Conference on Accelerator and Large Experimental Physics Control Systems, Barcelona, Spain, 8 - 13 Oct 2017, pp.TUPHA006
Book cover Cryogenic systems : advanced monitoring, fault diagnostics, and predictive maintenance / Arpaia, Pasquale
Cryogenics, the study and technology of materials and systems at very low temperature, is widely used for sensors and instruments requiring very highly precise measurements with low electrical resistance, especially for measurements of materials and energies at a very small scale [...]
New York, NY : Momentum Press, 2018. - 143 p.
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