
Tom Willemsen developed and maintained core scientific control and data processing systems across the ISISComputingGroup, focusing on the ibex_bluesky_core and related repositories. He engineered robust automation pipelines, non-blocking device control, and advanced data reducers for reflectometry and muon analysis, integrating technologies like Python, Kafka, and Java. Tom refactored APIs for extensibility, improved CI/CD reliability, and enhanced documentation to streamline onboarding and support. His work included cross-platform compatibility, secure database connectivity, and efficient backup utilities, addressing both operational reliability and developer productivity. Through careful code quality practices and comprehensive testing, Tom delivered maintainable solutions that improved data integrity and system resilience.

February 2026: Delivered Deployment Documentation Clarification for Instrument Control PC in the ibex_developers_manual repo, correcting syntax and enhancing deployment clarity. No major bugs reported this month. Impact: clearer deployment instructions reduce onboarding time and support queries, enabling faster Instrument Control PC deployments. Skills demonstrated: precise technical writing, documentation standards, and version-controlled changes (Git).
February 2026: Delivered Deployment Documentation Clarification for Instrument Control PC in the ibex_developers_manual repo, correcting syntax and enhancing deployment clarity. No major bugs reported this month. Impact: clearer deployment instructions reduce onboarding time and support queries, enabling faster Instrument Control PC deployments. Skills demonstrated: precise technical writing, documentation standards, and version-controlled changes (Git).
January 2026 performance: Implemented non-blocking device control and improved data serialization, stabilized cross-platform operation, and enhanced documentation for operators and developers. Key outcomes include AsyncMovable refactor in ibex_bluesky_core, msgpack_numpy-based Kafka key encoding, targeted docs tooling updates with path corrections and Sphinx pinning, cross-platform guards in FastCS, and IP/Serial mode selection for Knauer K-6 Valve Drive in EPICS-ioc, plus updated Knauer Valve Unifier docs.
January 2026 performance: Implemented non-blocking device control and improved data serialization, stabilized cross-platform operation, and enhanced documentation for operators and developers. Key outcomes include AsyncMovable refactor in ibex_bluesky_core, msgpack_numpy-based Kafka key encoding, targeted docs tooling updates with path corrections and Sphinx pinning, cross-platform guards in FastCS, and IP/Serial mode selection for Knauer K-6 Valve Drive in EPICS-ioc, plus updated Knauer Valve Unifier docs.
December 2025 performance highlights across ISISComputingGroup repositories. Delivered robust feature enhancements, streaming improvements, security updates, and documentation consolidation. These initiatives uplift reliability, security, and maintainability while enabling richer data handling and smoother onboarding for new developers. Key features delivered include: - AngleMappingReducer enhancements with flood correction for pixel efficiencies and an added R-squared fit-quality metric, plus a refactor for type checking (commits 6c31600ad779f467b899ecd3aa1a441106227b74; b70ec4b8505861e0822f3d605629d23f4d8170f0). - Kafka-based Bluesky document streaming via MsgPack with a custom callback to stream documents to Kafka, replacing Bluesky-kafka for better reliability and integration (commit 526e43d4081c8379584ce842273ccf147f1678ba). - Removal of Christmas-themed UI changes to restore standard styling and behavior (commits 45d2e3109e7858ee1119656f29667b17556e23d4; fba62924d4d62c019303c9abcae0ec5ca367e7ef; 8307de123f3a442fe0dc489af4286db370134fe3). - Public key retrieval support for MySQL connections in ibex_gui, including a JDBC URL parameter to enable it, improving security and database compatibility (commits 76460168e0b06f94e86d45f87c1ea71fff74becb; 9a10d28aa90c55df057ec050fc9f6f7aa8d443e7). - User Character Waveform feature added to EPICS-ioc to extend waveform data handling (commit f62b429d3c6d1c558e056644826d4556670ad746). - Documentation consolidation and readability enhancements across ibex_bluesky_core and ibex_developers_manual, including sysadmin manual migration and improved long-string/documentation coverage (commits 417c4d31be109c8bb19ce2884bec56dc8e63dbc0; 1e620094b81e26499f57dd6458365046bf7905f1; 60f42c79d5b2781c948065d4fc14ce7c3caf851e; 697b006212ff452c9cc04ef1abae68dea1c3c144).
December 2025 performance highlights across ISISComputingGroup repositories. Delivered robust feature enhancements, streaming improvements, security updates, and documentation consolidation. These initiatives uplift reliability, security, and maintainability while enabling richer data handling and smoother onboarding for new developers. Key features delivered include: - AngleMappingReducer enhancements with flood correction for pixel efficiencies and an added R-squared fit-quality metric, plus a refactor for type checking (commits 6c31600ad779f467b899ecd3aa1a441106227b74; b70ec4b8505861e0822f3d605629d23f4d8170f0). - Kafka-based Bluesky document streaming via MsgPack with a custom callback to stream documents to Kafka, replacing Bluesky-kafka for better reliability and integration (commit 526e43d4081c8379584ce842273ccf147f1678ba). - Removal of Christmas-themed UI changes to restore standard styling and behavior (commits 45d2e3109e7858ee1119656f29667b17556e23d4; fba62924d4d62c019303c9abcae0ec5ca367e7ef; 8307de123f3a442fe0dc489af4286db370134fe3). - Public key retrieval support for MySQL connections in ibex_gui, including a JDBC URL parameter to enable it, improving security and database compatibility (commits 76460168e0b06f94e86d45f87c1ea71fff74becb; 9a10d28aa90c55df057ec050fc9f6f7aa8d443e7). - User Character Waveform feature added to EPICS-ioc to extend waveform data handling (commit f62b429d3c6d1c558e056644826d4556670ad746). - Documentation consolidation and readability enhancements across ibex_bluesky_core and ibex_developers_manual, including sysadmin manual migration and improved long-string/documentation coverage (commits 417c4d31be109c8bb19ce2884bec56dc8e63dbc0; 1e620094b81e26499f57dd6458365046bf7905f1; 60f42c79d5b2781c948065d4fc14ce7c3caf851e; 697b006212ff452c9cc04ef1abae68dea1c3c144).
November 2025 delivered a major architectural refresh across core Ibex components, redefining API behavior and laying groundwork for extensibility and development-mode workflows. Key features introduced include Autoalign for improved fitting automation, and normalization in PeriodSpecIntegralsReducer to stabilize numerical results. DAE support was expanded with basic operations and utilities, enhancing device automation capabilities. CI, tooling and documentation hygiene were improved to accelerate development cycles and ensure higher documentation quality, with readiness for Python 3.13 and upgraded dependencies (Matplotlib 3.10.7). Supporting fixes addressed math use and x-refs, and Java ecosystem alignment was pursued to maintain compatibility while keeping delivery stable.
November 2025 delivered a major architectural refresh across core Ibex components, redefining API behavior and laying groundwork for extensibility and development-mode workflows. Key features introduced include Autoalign for improved fitting automation, and normalization in PeriodSpecIntegralsReducer to stabilize numerical results. DAE support was expanded with basic operations and utilities, enhancing device automation capabilities. CI, tooling and documentation hygiene were improved to accelerate development cycles and ensure higher documentation quality, with readiness for Python 3.13 and upgraded dependencies (Matplotlib 3.10.7). Supporting fixes addressed math use and x-refs, and Java ecosystem alignment was pursued to maintain compatibility while keeping delivery stable.
October 2025 monthly summary focusing on delivering business value through storage/performance optimizations, data consistency improvements, and developer productivity across multiple repositories. The team shipped targeted features, fixed critical issues, and strengthened the foundation for future development.
October 2025 monthly summary focusing on delivering business value through storage/performance optimizations, data consistency improvements, and developer productivity across multiple repositories. The team shipped targeted features, fixed critical issues, and strengthened the foundation for future development.
September 2025 performance summary: Delivered a focused set of documentation improvements, tooling enhancements, and system optimizations that directly improve developer productivity, operator reliability, and data throughput. Work spanned five repositories, with a strong emphasis on onboarding, control-system clarity, environment provisioning, automated dependency workflows, and EPICS/ioc efficiency.
September 2025 performance summary: Delivered a focused set of documentation improvements, tooling enhancements, and system optimizations that directly improve developer productivity, operator reliability, and data throughput. Work spanned five repositories, with a strong emphasis on onboarding, control-system clarity, environment provisioning, automated dependency workflows, and EPICS/ioc efficiency.
August 2025 performance summary: Reliability, security, and developer-experience improvements were delivered across the IBEX ecosystem. Notable work spanned ibex_utils (robust return-code handling, explicit Python launcher usage for upgrade scripts, logging hardening and privacy improvements, and Rust toolchain provisioning), ibex_developers_manual (local EPICS documentation inventory fallback, enhanced SSH key management guidance, and GUI deployment validation for CSS compatibility), Bluesky/IBEX contributions (type-hint standardization and event-model dependency upgrade, plus on-demand future-dependency testing in the bluesky_core workflow), and targeted UI/documentation updates (CSS GUI dependency upgrade; Alarms tooltip release notes correction; certifi note in requirements). These efforts reduce upgrade failures, strengthen security and compliance, improve CI/CD reliability, and streamline developer onboarding.
August 2025 performance summary: Reliability, security, and developer-experience improvements were delivered across the IBEX ecosystem. Notable work spanned ibex_utils (robust return-code handling, explicit Python launcher usage for upgrade scripts, logging hardening and privacy improvements, and Rust toolchain provisioning), ibex_developers_manual (local EPICS documentation inventory fallback, enhanced SSH key management guidance, and GUI deployment validation for CSS compatibility), Bluesky/IBEX contributions (type-hint standardization and event-model dependency upgrade, plus on-demand future-dependency testing in the bluesky_core workflow), and targeted UI/documentation updates (CSS GUI dependency upgrade; Alarms tooltip release notes correction; certifi note in requirements). These efforts reduce upgrade failures, strengthen security and compliance, improve CI/CD reliability, and streamline developer onboarding.
July 2025 performance highlights: Delivered core enhancements across Ibex and Bluesky repos to improve release governance, data processing, and documentation; stabilized numerical workflows; and expanded instrumentation and analysis capabilities. Key achievements include governance improvements for release notes and ADRs, a robust release-management workflow, and a major extension of the MuonAsymmetryReducer with LMFit support for data fitting. Documentation and onboarding were strengthened through comprehensive instrument documentation updates and migration of content from IBEX wiki. UI reliability was improved in the GUI tool, and deployment/installation workflows were modernized for faster, more reliable installs. Enhanced event handling in Bluesky broadened API flexibility and future extensibility. These efforts collectively shorten release cycles, improve data quality and reproducibility, and reduce setup time for users and developers.
July 2025 performance highlights: Delivered core enhancements across Ibex and Bluesky repos to improve release governance, data processing, and documentation; stabilized numerical workflows; and expanded instrumentation and analysis capabilities. Key achievements include governance improvements for release notes and ADRs, a robust release-management workflow, and a major extension of the MuonAsymmetryReducer with LMFit support for data fitting. Documentation and onboarding were strengthened through comprehensive instrument documentation updates and migration of content from IBEX wiki. UI reliability was improved in the GUI tool, and deployment/installation workflows were modernized for faster, more reliable installs. Enhanced event handling in Bluesky broadened API flexibility and future extensibility. These efforts collectively shorten release cycles, improve data quality and reproducibility, and reduce setup time for users and developers.
June 2025 performance snapshot: Delivered targeted features, critical bug fixes, and documentation/architecture improvements across multiple ISISComputingGroup repositories. Highlights include test coverage for the temporarily_kill_icp context manager, CI/CD workflow enhancements, integration work for OPCUA in EPICS IOC, and a robust SSH-based AdminRunner. These efforts improved reliability, developer experience, and operational clarity while accelerating validation and release readiness.
June 2025 performance snapshot: Delivered targeted features, critical bug fixes, and documentation/architecture improvements across multiple ISISComputingGroup repositories. Highlights include test coverage for the temporarily_kill_icp context manager, CI/CD workflow enhancements, integration work for OPCUA in EPICS IOC, and a robust SSH-based AdminRunner. These efforts improved reliability, developer experience, and operational clarity while accelerating validation and release readiness.
May 2025 performance summary focusing on business value and technical achievements across the Ibex suite. Delivery across back-end tooling, Bluesky core, GUI/testing infrastructure, and reliability improvements drove automation, data quality, and developer productivity. 1) Key features delivered: - ibex_utils: Developer Update and Backup Process Modernization delivering zip-based backups with robust creation, progress feedback, enhanced exclusions, and performance tuning to speed updates and reduce unnecessary data. - ibex_bluesky_core: Non-interactive RunEngine plan execution with reentrancy protection and idle-state check to enable reliable automation pipelines. - ibex_bluesky_core: DSpacingMappingReducer integration for d-spacing exposure, live visualization callbacks, and robust data processing/reporting in DAE scans. - ibex_bluesky_core: Reflectometry parameter handling improvements with simplified signatures and broader test coverage. - ibex_bluesky_core: Plot PNG saving directory creation fix to prevent errors when writing to new paths; test stability improvements for waiters. - ibex_gui: Testing infrastructure simplification by removing xmlrunner and adopting the default TextTestRunner. - genie: Defensive module name clash protection, robust startup error handling for WebAggApplication, and targeted quality improvements (typing, utilities, and error messages). - Reversion and safety: Regression revert to restore stable update scripts and backup tasks after recent changes in dev flows. 2) Major bugs fixed: - Reverted disruptive dev changes to restore stable update/backup behavior and safe space management after backups. - Plot directory creation error fixed to ensure plots save reliably to new directories. - Increased test stability for waiters to reduce flaky failures by extending timeouts. - Fixed grammar and clarity in error messaging around module name clashes and wrapped decorators for clarity (CodeQL-related enhancements). - Pylint plugin crash prevention and related utilities improvements to reduce false positives and crashes in static analysis. 3) Overall impact and accomplishments: - Significantly improved automation and reliability of developer workflows and data processing pipelines, reducing manual intervention and error-prone steps. - Enabled non-interactive plan execution and richer detector data exposure, enabling automation and live insight in DAE scans. - Strengthened testing and linting infrastructure, reducing flaky tests and improving developer feedback loops. - Improved business value through faster release cycles, safer backups, and higher quality scientific data processing. 4) Technologies/skills demonstrated: - Python, zip-based backups, progress feedback UX, and exclusion handling in backup tooling. - Bluesky framework: RunEngine non-interactive execution, reentrancy, DSpacingMappingReducer, DAE integration, and async test patterns. - Detector data processing, d-spacing computation, and live visualization callbacks. - Test infrastructure improvements (XMLRunner removal, TextTestRunner usage), async testing, and Type Hinting (Pyright) for robustness. - Code quality improvements: typing enhancements, error handling, Pylint plugin hardening, and robust decorator behavior.
May 2025 performance summary focusing on business value and technical achievements across the Ibex suite. Delivery across back-end tooling, Bluesky core, GUI/testing infrastructure, and reliability improvements drove automation, data quality, and developer productivity. 1) Key features delivered: - ibex_utils: Developer Update and Backup Process Modernization delivering zip-based backups with robust creation, progress feedback, enhanced exclusions, and performance tuning to speed updates and reduce unnecessary data. - ibex_bluesky_core: Non-interactive RunEngine plan execution with reentrancy protection and idle-state check to enable reliable automation pipelines. - ibex_bluesky_core: DSpacingMappingReducer integration for d-spacing exposure, live visualization callbacks, and robust data processing/reporting in DAE scans. - ibex_bluesky_core: Reflectometry parameter handling improvements with simplified signatures and broader test coverage. - ibex_bluesky_core: Plot PNG saving directory creation fix to prevent errors when writing to new paths; test stability improvements for waiters. - ibex_gui: Testing infrastructure simplification by removing xmlrunner and adopting the default TextTestRunner. - genie: Defensive module name clash protection, robust startup error handling for WebAggApplication, and targeted quality improvements (typing, utilities, and error messages). - Reversion and safety: Regression revert to restore stable update scripts and backup tasks after recent changes in dev flows. 2) Major bugs fixed: - Reverted disruptive dev changes to restore stable update/backup behavior and safe space management after backups. - Plot directory creation error fixed to ensure plots save reliably to new directories. - Increased test stability for waiters to reduce flaky failures by extending timeouts. - Fixed grammar and clarity in error messaging around module name clashes and wrapped decorators for clarity (CodeQL-related enhancements). - Pylint plugin crash prevention and related utilities improvements to reduce false positives and crashes in static analysis. 3) Overall impact and accomplishments: - Significantly improved automation and reliability of developer workflows and data processing pipelines, reducing manual intervention and error-prone steps. - Enabled non-interactive plan execution and richer detector data exposure, enabling automation and live insight in DAE scans. - Strengthened testing and linting infrastructure, reducing flaky tests and improving developer feedback loops. - Improved business value through faster release cycles, safer backups, and higher quality scientific data processing. 4) Technologies/skills demonstrated: - Python, zip-based backups, progress feedback UX, and exclusion handling in backup tooling. - Bluesky framework: RunEngine non-interactive execution, reentrancy, DSpacingMappingReducer, DAE integration, and async test patterns. - Detector data processing, d-spacing computation, and live visualization callbacks. - Test infrastructure improvements (XMLRunner removal, TextTestRunner usage), async testing, and Type Hinting (Pyright) for robustness. - Code quality improvements: typing enhancements, error handling, Pylint plugin hardening, and robust decorator behavior.
April 2025 monthly summary: Delivered a broad set of features and reliability improvements across ibex_bluesky_core, ibex_gui, ibex_utils and ibex_developers_manual. Key focus areas included documentation quality and architecture, robust error handling, tooling upgrades, and updated deployment readiness. The work reduces production risk, improves maintainability, and accelerates developer onboarding through clearer ADRs, better tests, and modernized tooling.
April 2025 monthly summary: Delivered a broad set of features and reliability improvements across ibex_bluesky_core, ibex_gui, ibex_utils and ibex_developers_manual. Key focus areas included documentation quality and architecture, robust error handling, tooling upgrades, and updated deployment readiness. The work reduces production risk, improves maintainability, and accelerates developer onboarding through clearer ADRs, better tests, and modernized tooling.
March 2025 performance summary for ISISComputingGroup development. Focused on delivering high-value features, improving reliability, and strengthening security/quality gates across the codebase. Key outcomes include performance optimization for the DG645 Graph OPI with lightweight UI scaffolding, security and quality enhancements in CI/CD (CodeQL workflow and automated OPI validation), richer graph interaction data through Matplotlib websocket events, expanded test coverage and static analysis adoption, and readiness improvements for Python 3.12 along with governance automation. These efforts translate into faster UX, more reliable instrument control, earlier security/quality feedback, and easier maintenance for teams.
March 2025 performance summary for ISISComputingGroup development. Focused on delivering high-value features, improving reliability, and strengthening security/quality gates across the codebase. Key outcomes include performance optimization for the DG645 Graph OPI with lightweight UI scaffolding, security and quality enhancements in CI/CD (CodeQL workflow and automated OPI validation), richer graph interaction data through Matplotlib websocket events, expanded test coverage and static analysis adoption, and readiness improvements for Python 3.12 along with governance automation. These efforts translate into faster UX, more reliable instrument control, earlier security/quality feedback, and easier maintenance for teams.
February 2025 monthly summary focusing on delivering reliability, performance, and value across EPICS IOs, GUI and core analysis tooling. Completed bug fixes to OPI parsing/formatting, improved UI/config capabilities, corrected data sources, and added essential mapping and API improvements. Reduced data load for sensors, cleaned production logs, and established robust tests for critical components.
February 2025 monthly summary focusing on delivering reliability, performance, and value across EPICS IOs, GUI and core analysis tooling. Completed bug fixes to OPI parsing/formatting, improved UI/config capabilities, corrected data sources, and added essential mapping and API improvements. Reduced data load for sensors, cleaned production logs, and established robust tests for critical components.
January 2025 performance highlights across EPICS IOC, GUI, Genie backend, and CI tooling, focusing on reliability, usability, and maintainability. Delivered features and fixes that improve instrument startup reliability, data accessibility, UI usability, and end-to-end data pipelines, enabling smoother experiments and faster issue resolution. Key efforts spanned cross-repo IOC configuration, modernized user interfaces, backend resilience, and explicit CI Python tooling to reduce drift and maintenance costs.
January 2025 performance highlights across EPICS IOC, GUI, Genie backend, and CI tooling, focusing on reliability, usability, and maintainability. Delivered features and fixes that improve instrument startup reliability, data accessibility, UI usability, and end-to-end data pipelines, enabling smoother experiments and faster issue resolution. Key efforts spanned cross-repo IOC configuration, modernized user interfaces, backend resilience, and explicit CI Python tooling to reduce drift and maintenance costs.
December 2024 monthly summary focused on delivering user-facing improvements, code quality, and UI/IOC cleanup across three repositories. Highlights include documentation enhancements for LivePlot and BlockMot integration, linting and code style cleanups to improve maintainability, removal of deprecated HIFIMAG IOC components, and targeted OPI UI fixes to improve robustness.
December 2024 monthly summary focused on delivering user-facing improvements, code quality, and UI/IOC cleanup across three repositories. Highlights include documentation enhancements for LivePlot and BlockMot integration, linting and code style cleanups to improve maintainability, removal of deprecated HIFIMAG IOC components, and targeted OPI UI fixes to improve robustness.
November 2024 performance summary focusing on delivering a robust, scalable platform for EPICS IOC deployment, GUI monitoring, data logging, and packaging/CI improvements across multiple repositories. Emphasis on business value: faster IOC provisioning, improved data visibility, increased reliability, and streamlined release processes.
November 2024 performance summary focusing on delivering a robust, scalable platform for EPICS IOC deployment, GUI monitoring, data logging, and packaging/CI improvements across multiple repositories. Emphasis on business value: faster IOC provisioning, improved data visibility, increased reliability, and streamlined release processes.
October 2024: Delivered cross-platform reliability improvements and platform expansions across the Bluesky suite. Key accomplishments include Windows CI coverage, test stability fixes, Java 21 compatibility, and enhanced documentation for ibex_bluesky_core. These changes reduce flaky tests, improve developer onboarding, and broaden runtime compatibility across Windows and Java environments.
October 2024: Delivered cross-platform reliability improvements and platform expansions across the Bluesky suite. Key accomplishments include Windows CI coverage, test stability fixes, Java 21 compatibility, and enhanced documentation for ibex_bluesky_core. These changes reduce flaky tests, improve developer onboarding, and broaden runtime compatibility across Windows and Java environments.
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