Improved Software Production for the LHC Tunnel Cryogenics Control System

Fluder, C.; Wolak, Tomasz; Drozd, A.; Dudek, M. W.; Francesco, Frassinelli; Pezzetti, M.; Tovar-Gonzalez, A.; Zapolski, M.

doi:10.1016/j.phpro.2015.06.176

Cited by 2 publications

(3 citation statements)

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“…Over the years, CERN has continuously investigating innovative methods looking for improvements in code quality assurance and in manpower optimization for the control system production. Thus, CERN is using continuous integration practices, allowing a more reliable and versatile process control system [5].…”

Section: Code Implementationmentioning

confidence: 99%

Automatic LHC accelerator warm-up and cool-down experience during the Long Shutdown 2

Bradu¹,

Brodzinski²,

Ferlin³

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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During the so-called Long Shutdown 2 (LS2), the Large Hadron Collider (LHC) has been entirely warmed-up in 2019 and cooled-down in 2020/2021 after an important maintenance period. For the first time, these complex and delicate operations have been performed in an automatic way, using a new control logic implemented in the Process Logic Controllers (PLC). This new control logic is based on similar experiences that occurred in 2008, 2013 and 2014 where many manual operations were still needed to ensure all the constraints around the machine. After a short presentation of the general LHC warm-up and cool-down principles and constraints, this paper details the global control logic that has been chosen to fulfil all requirements. This new approach is using thermodynamic considerations to spread efficiently the available helium massflows and refrigeration capacity along a LHC sector of 3.3 km (the accelerator totalizing eight cryogenic sectors), optimizing the transient time and respecting the constraints. Finally, the warm-up and cool-down achieved on the eight LHC sectors between 2019 and 2021 are presented and discussed, validating this new approach.

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Section: Code Implementationmentioning

confidence: 99%

Automatic LHC accelerator warm-up and cool-down experience during the Long Shutdown 2

Bradu¹,

Brodzinski²,

Ferlin³

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…The CERN cryogenics control system architecture uses various CERN frameworks (including the UNIfied Industrial Control: UNICOS). An important step in improving the control system production has been the association of high-level continuous integration practice allowing for a more reliable and versatile process control system [2]. Recent improvements and applications of continuous integration practices for the development of cryogenics control systems will be showed by detailing the driving force in its approach for a high-level automation.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, the CI provides a feedback mechanism to inform the user about the result of the process. CERN has applied this method successfully to the LHC tunnel cryogenics control system since 2015 allowing for efficient and reliable development, updates, and redeployment of PLC-based industrial applications [2]. Other benefits that this method provides is a better code quality by creating stable builds more frequently, reducing the time for code review by automatically testing the new modifications, and increasing transparency and visibility by the creation of reports.…”

Section: Introductionmentioning

confidence: 99%

An innovative approach for the design of cryogenic electrical and process control systems at CERN: the cryogenic Continuous Integration project

Barbe

Pezzetti

Martin

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Designing, building, commissioning, operating and maintaining multiple complex cryogenics process control systems involves many challenges. For several years, CERN has developed various solutions to help with the whole lifecycle of a cryogenic process control system. This has allowed the production of quality and highly reliable cryogenic control and electrical systems. This paper will present the use of these innovative and automated tools and their evolution; focusing in the first part on continuous integration practices applied to the production of Programmable Logic Controller (PLC) software. The second part will develop the practical applications for software upgrades implemented for the cryogenics processes of non-LHC detectors and test facilities at CERN. Finally, a detailed description of the approach to a standardized generation of electrical drawing for cryogenic systems will be presented along with concrete solutions already successfully implemented in operation.

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Improved Software Production for the LHC Tunnel Cryogenics Control System

Cited by 2 publications

References 0 publications

Automatic LHC accelerator warm-up and cool-down experience during the Long Shutdown 2

Automatic LHC accelerator warm-up and cool-down experience during the Long Shutdown 2

An innovative approach for the design of cryogenic electrical and process control systems at CERN: the cryogenic Continuous Integration project

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