DiamondLightSource/dodal
Dec 2024 – Jan 2026
11 Months active
Languages Used
PythonMarkdown
Technical Skills
Beamline ConfigurationBeamline ControlDevice ControlDevice IntegrationEpicsOphyd
Raymond Fan
PROFILE
Raymond Fan
Raymond Fan developed and enhanced beamline control and configuration systems within the DiamondLightSource/dodal repository, delivering features that improved automation, device integration, and experimental reliability. He implemented robust Python and EPICS-based solutions for hardware abstraction, asynchronous device management, and modular configuration, enabling scalable support for multiple beamlines and devices. His work included refactoring device instantiation, integrating temperature controllers and undulator controls, and optimizing energy lookup algorithms for performance and safety. By focusing on maintainable architecture, comprehensive testing, and clear documentation, Raymond addressed operational risks, reduced onboarding time, and ensured the control software remained adaptable to evolving experimental requirements and hardware platforms.
Overall Statistics
Feature vs Bugs
85%Features
Repository Contributions
32Total
Bugs
4
Commits
32
Features
23
Lines of code
13,237
Activity Months11
Your Network
59 people
Work History
January 2026
6 Commits • 6 Features
Jan 1, 2026January 2026 monthly performance summary for DiamondLightSource/dodal. Delivered six feature enhancements across beamline operations, strengthening automation, modularity, and experimentation capabilities. No formal bug fixes were reported this month; improvements were achieved mainly through refactoring, new device implementations, and enhanced control logic. Business impact includes reduced beamline setup time, increased automation, and expanded experimental capabilities across multiple beamlines.
6 Commits • 6 Features
Jan 1, 2026January 2026 monthly performance summary for DiamondLightSource/dodal. Delivered six feature enhancements across beamline operations, strengthening automation, modularity, and experimentation capabilities. No formal bug fixes were reported this month; improvements were achieved mainly through refactoring, new device implementations, and enhanced control logic. Business impact includes reduced beamline setup time, increased automation, and expanded experimental capabilities across multiple beamlines.
January 2026
December 2025
2 Commits • 2 Features
Dec 1, 2025Concise monthly summary for December 2025 focused on delivering robust energy handling and safe device movement within the DiamondLightSource/dodal repository. Emphasizes business impact, reliability, and technical excellence.
December 2025
2 Commits • 2 Features
Dec 1, 2025Concise monthly summary for December 2025 focused on delivering robust energy handling and safe device movement within the DiamondLightSource/dodal repository. Emphasizes business impact, reliability, and technical excellence.
November 2025
4 Commits • 1 Features
Nov 1, 2025November 2025 performance summary for DiamondLightSource/dodal highlighting feature delivery, reliability improvements, and technical execution enabling more reliable, precise control of Apple2 devices across beamlines and reduced risk of hangs.
4 Commits • 1 Features
Nov 1, 2025November 2025 performance summary for DiamondLightSource/dodal highlighting feature delivery, reliability improvements, and technical execution enabling more reliable, precise control of Apple2 devices across beamlines and reduced risk of hangs.
November 2025
October 2025
4 Commits • 3 Features
Oct 1, 2025Month 2025-10 monthly summary for DiamondLightSource/dodal focusing on key feature deliveries, impact, and technical excellence. Delivered three major Apple2 undulator enhancements across multiple beamlines, enabling more flexible energy and polarization control and preparing the ground for future automation. No major bugs were reported this month.
October 2025
4 Commits • 3 Features
Oct 1, 2025Month 2025-10 monthly summary for DiamondLightSource/dodal focusing on key feature deliveries, impact, and technical excellence. Delivered three major Apple2 undulator enhancements across multiple beamlines, enabling more flexible energy and polarization control and preparing the ground for future automation. No major bugs were reported this month.
September 2025
6 Commits • 3 Features
Sep 1, 20252025-09 monthly summary for DiamondLightSource/dodal: Delivered key beamline configuration, safety and hardware integration features, and foundational refactors to enable scalable support for multiple beamlines and devices. Strengthened hardware integration with Lakeshore devices, modularized Apple2 undulator configuration, and implemented safety controls to prevent unstable polarization operations.
6 Commits • 3 Features
Sep 1, 20252025-09 monthly summary for DiamondLightSource/dodal: Delivered key beamline configuration, safety and hardware integration features, and foundational refactors to enable scalable support for multiple beamlines and devices. Strengthened hardware integration with Lakeshore devices, modularized Apple2 undulator configuration, and implemented safety controls to prevent unstable polarization operations.
September 2025
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for DiamondLightSource/dodal: Focused on strengthening developer experience and maintainability through targeted documentation improvements. Delivered a comprehensive restructuring of the create-device docs within the dodal framework, clarifying guidelines for reusing existing device classes, implementing new devices, and adhering to Bluesky plan best practices. These changes reduce onboarding time, minimize missteps during device integration, and lay the groundwork for scalable device development. No major bugs fixed this month; the emphasis was on clarity, consistency, and guidance to accelerate future contributions. Technologies demonstrated include documentation engineering, Git-based change management, and adherence to domain-specific best practices.
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for DiamondLightSource/dodal: Focused on strengthening developer experience and maintainability through targeted documentation improvements. Delivered a comprehensive restructuring of the create-device docs within the dodal framework, clarifying guidelines for reusing existing device classes, implementing new devices, and adhering to Bluesky plan best practices. These changes reduce onboarding time, minimize missteps during device integration, and lay the groundwork for scalable device development. No major bugs fixed this month; the emphasis was on clarity, consistency, and guidance to accelerate future contributions. Technologies demonstrated include documentation engineering, Git-based change management, and adherence to domain-specific best practices.
July 2025
1 Commits • 1 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on business value and technical achievements in the DiamondLightSource/dodal project.
1 Commits • 1 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on business value and technical achievements in the DiamondLightSource/dodal project.
July 2025
June 2025
1 Commits • 1 Features
Jun 1, 2025Concise monthly summary for 2025-06 focusing on key accomplishments for DiamondLightSource/dodal. The primary focus this month was delivering the I10 Beamline Configuration Refactor to simplify device instantiation and enhance handling of insertion devices (IDs). This work also reduced reliance on redundant references and updated device definitions to create a more streamlined, maintainable setup.
June 2025
1 Commits • 1 Features
Jun 1, 2025Concise monthly summary for 2025-06 focusing on key accomplishments for DiamondLightSource/dodal. The primary focus this month was delivering the I10 Beamline Configuration Refactor to simplify device instantiation and enhance handling of insertion devices (IDs). This work also reduced reliance on redundant references and updated device definitions to create a more streamlined, maintainable setup.
April 2025
3 Commits • 3 Features
Apr 1, 2025April 2025 (Month: 2025-04) saw a focused delivery of feature work on the DiamondLightSource/dodal repository, prioritizing diagnostics data quality, reliability of signal handling, and expanded instrument support. Delivered work strengthens data collection fidelity for I10 diagnostics, streamlines hardware signal management, and broadens beamline instrumentation capabilities, laying groundwork for improved beamline uptime and experimental throughput. Key features delivered include: - I10 Diagnostics: New Ophyd devices and enhanced data collection, including slit drain current measurements, refactored slit definitions, and new classes for pneumatic stages, cameras, and positioners to improve data granularity and accuracy. - Signal handling refactor with ophyd-async: Replaced custom backend implementations with ophyd-async derived signals to streamline and stabilize device signal management within the dodal library. - Andor2 detector integration into the p99 beamline: Added imports, device definitions, path provider setup, and a new Andor2Point class to read statistics from the detector. Overall impact and accomplishments: - Improved diagnostic data fidelity and access to granular device states, enabling more precise beamline tuning and faster troubleshooting. - Increased reliability and maintainability of the signal layer, reducing custom maintenance burden and aligning with modern ophyd practices. - Expanded experimental capabilities on the p99 beamline with the Andor2 detector, enabling new measurement workflows and data quality improvements. Technologies/skills demonstrated: - Ophyd device modeling and data collection strategies - ophyd-async for asynchronous signal handling - Python-based instrument integration and data access patterns - Refactoring for reliability and maintainability; emphasis on testable, scalable design
3 Commits • 3 Features
Apr 1, 2025April 2025 (Month: 2025-04) saw a focused delivery of feature work on the DiamondLightSource/dodal repository, prioritizing diagnostics data quality, reliability of signal handling, and expanded instrument support. Delivered work strengthens data collection fidelity for I10 diagnostics, streamlines hardware signal management, and broadens beamline instrumentation capabilities, laying groundwork for improved beamline uptime and experimental throughput. Key features delivered include: - I10 Diagnostics: New Ophyd devices and enhanced data collection, including slit drain current measurements, refactored slit definitions, and new classes for pneumatic stages, cameras, and positioners to improve data granularity and accuracy. - Signal handling refactor with ophyd-async: Replaced custom backend implementations with ophyd-async derived signals to streamline and stabilize device signal management within the dodal library. - Andor2 detector integration into the p99 beamline: Added imports, device definitions, path provider setup, and a new Andor2Point class to read statistics from the detector. Overall impact and accomplishments: - Improved diagnostic data fidelity and access to granular device states, enabling more precise beamline tuning and faster troubleshooting. - Increased reliability and maintainability of the signal layer, reducing custom maintenance burden and aligning with modern ophyd practices. - Expanded experimental capabilities on the p99 beamline with the Andor2 detector, enabling new measurement workflows and data quality improvements. Technologies/skills demonstrated: - Ophyd device modeling and data collection strategies - ophyd-async for asynchronous signal handling - Python-based instrument integration and data access patterns - Refactoring for reliability and maintainability; emphasis on testable, scalable design
April 2025
February 2025
2 Commits
Feb 1, 2025February 2025 monthly summary for DiamondLightSource/dodal. Key features delivered: corrected RasorScalerCard1 PV suffix handling to access proper hardware channels. Major bugs fixed: updated timeout handling tests to mock get_timeout instead of _cal_timeout, aligning tests with actual device behavior. Overall impact: improved hardware access reliability and more stable test suite, reducing misconfiguration risk and CI flakiness. Technologies/skills demonstrated: EPICS PV suffix management, hardware integration, test-driven development, and test mocking strategies.
February 2025
2 Commits
Feb 1, 2025February 2025 monthly summary for DiamondLightSource/dodal. Key features delivered: corrected RasorScalerCard1 PV suffix handling to access proper hardware channels. Major bugs fixed: updated timeout handling tests to mock get_timeout instead of _cal_timeout, aligning tests with actual device behavior. Overall impact: improved hardware access reliability and more stable test suite, reducing misconfiguration risk and CI flakiness. Technologies/skills demonstrated: EPICS PV suffix management, hardware integration, test-driven development, and test mocking strategies.
December 2024
2 Commits • 2 Features
Dec 1, 2024December 2024 performance summary for DiamondLightSource/dodal: Delivered two high-impact beamline features that expand instrument capability and improve hardware integration reliability. Implemented i10 beamline device support with new PiezoMirror and I10Slits definitions and config instantiation, and added RASOR beamline ophyd devices for current amplifiers, detectors, and motion components, along with tests. These efforts enhance operability, enable faster beamline readiness, and support high-quality data collection. Demonstrated strong Python/Ophyd modeling, test coverage, and maintainable configuration patterns.
2 Commits • 2 Features
Dec 1, 2024December 2024 performance summary for DiamondLightSource/dodal: Delivered two high-impact beamline features that expand instrument capability and improve hardware integration reliability. Implemented i10 beamline device support with new PiezoMirror and I10Slits definitions and config instantiation, and added RASOR beamline ophyd devices for current amplifiers, detectors, and motion components, along with tests. These efforts enhance operability, enable faster beamline readiness, and support high-quality data collection. Demonstrated strong Python/Ophyd modeling, test coverage, and maintainable configuration patterns.
December 2024
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Quality Metrics
Correctness90.6%
Maintainability85.4%
Architecture88.4%
Performance82.6%
AI Usage25.0%
Skills & Technologies
Programming Languages
MarkdownPython
Technical Skills
API developmentAPI integrationAsyncIOAsynchronous ProgrammingBackend DevelopmentBeamline ConfigurationBeamline ControlBeamline Control SystemsBeamline SetupConfiguration ManagementControl SystemsDevice ConfigurationDevice ControlDevice IntegrationDocumentation
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