| Paper |
Title |
Page |
| MO4BCO02 |
Lessons from Using Python GraphQL Libraries to Develop an EPICS PV Server for Web UIs |
191 |
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- R.J. Auger-Williams
OSL, St Ives, Cambridgeshire, United Kingdom
- A.L. Alexander, T.M. Cobb, M.J. Gaughran, A.J. Rose, A.W.R. Wells, A.A. Wilson
DLS, Oxfordshire, United Kingdom
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Diamond Light Source is currently developing a web-based EPICS control system User Interface (UI). This will replace the use of EDM and the Eclipse-based CS-Studio at Diamond, and it will integrate with future Acquisition and Analysis software. For interoperability, it will use the Phoebus BOB file format. The architecture consists of a back-end application using EPICS Python libraries to obtain PV data and the query language GraphQL to serve these data to a React-based front end. A prototype was made in 2021, and we are now doing further development from the prototype to meet the first use cases. Our current work focuses on the back-end application, Coniql, and for the query interface we have selected the Strawberry GraphQL implementation from the many GraphQL libraries available. We discuss the reasons for this decision, highlight the issues that arose with GraphQL, and outline our solutions. We also demonstrate how well these libraries perform within the context of the EPICS web UI requirements using a set of performance metrics. Finally, we provide a summary of our development plans.
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Slides MO4BCO02 [4.243 MB]
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-ICALEPCS2023-MO4BCO02
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| About • |
Received ※ 29 September 2023 — Accepted ※ 13 October 2023 — Issued ※ 20 October 2023 |
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| Cite • |
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| TUPDP109 |
Tickit: An Event-Based Multi-Device Simulation Framework |
823 |
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- A. Emery, T.M. Cobb, C.A. Forrester, G. O’Donnell
DLS, Oxfordshire, United Kingdom
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Tickit is an event-based multi-device simulation framework providing configuration and orchestration of complex simulations. It was developed at Diamond Light Source in order to overcome limitations presented to us by some of our existing hardware simulations. With the Tickit framework, simulations can be addressed with a compositional approach. It allows devices to be simulated individually while still maintaining the interconnected behaviour exhibited by their hardware counterparts. This is achieved by modelling the interactions between devices, such as electronic signals. Devices can be collated into larger simulated systems providing a layer of simulated hardware against which to test the full stack of Data Acquisition and Controls tools. We aim to use this framework to extend the scope and improve the interoperability of our simulations; enabling us to further improve the testing of current systems and providing a preferential platform to assist in development of the new Acquisition and Controls tools.
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Poster TUPDP109 [0.703 MB]
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-ICALEPCS2023-TUPDP109
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| About • |
Received ※ 29 September 2023 — Revised ※ 21 October 2023 — Accepted ※ 04 December 2023 — Issued ※ 18 December 2023 |
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reference for this paper using
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| THMBCMO22 |
Towards Defining a Synchronization Standard Between Beamline Components and Synchrotron Accelerators |
1242 |
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- J.A. Avila-Abellan, X. Serra-Gallifa
ALBA-CELLS, Cerdanyola del Vallès, Spain
- T.M. Cobb
DLS, Oxfordshire, United Kingdom
- R. Hino
ESRF, Grenoble, France
- O.H. Seeck
DESY, Hamburg, Germany
- S. Zhang
SOLEIL, Gif-sur-Yvette, France
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Funding: LEAPS-INNOV project has received funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No 101004728
Standardization is a magic word in the electronics engineering jargon. Under its umbrella, it is generated the utopia of transparent integration with the rest of the parts with minimal extra effort for the software integration. But the experimental setup in a synchrotron beamline presents multiple challenges: it is highly dynamic and diverse. In the frame of LEAPS-INNOV project (*), the Task 3 of Work Package 5 aims to define a standard for synchronization in the beamline sample environment. Their partners (ALBA, DESY, DLS, ESRF and SOLEIL) have already reached a common vision of synchronization requirements. This paper first details the participants’ actual synchronization needs on their facilities. Next, the requirements foreseen for the future are outlined in terms of interfaces, time constraints and compatibility with timing systems. To conclude, we summarize the current state of the project: the hardware interfaces and the hardware platform definition. They both have been decided considering long-term availability, use of standard sub-components, and keeping the compromise between cost, development time, maintenance, reliability, flexibility and performance. This hardware architecture proposal meets the identified requirements. In the future, under the scope of LEAPS-INNOV, a demonstrator will be built, and we will work with the industry for its future commercialization.
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Slides THMBCMO22 [1.592 MB]
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Poster THMBCMO22 [0.760 MB]
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-ICALEPCS2023-THMBCMO22
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| About • |
Received ※ 06 October 2023 — Revised ※ 11 October 2023 — Accepted ※ 11 December 2023 — Issued ※ 19 December 2023 |
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reference for this paper using
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※ LaTeX,
※ Text/Word,
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