High-Performance Electron Optics System Design & Review

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Electron Optics Design Consultancy

Independent consulting in electron optical architecture for resolution- and stability-critical charged particle instrumentation. Engaged by internal development teams to diagnose and resolve resolution limits, aberration impact, and stability constraints in active high-performance programs.

Core service offering

Electron Optics Diagnostics Review

Independent analysis to identify what is truly limiting your system

A short, fixed-scope engagement focused on understanding why a system underperforms, behaves unexpectedly, or fails to reach its intended resolution.

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Used when:

  • Simulation and measurement do not agree
  • Performance limits are unclear
  • Aberrations or artefacts appear without clear cause
  • Design iterations are not converging

Includes:

  • Review of available design, simulation, and measurement data
  • Identification of dominant aberrations and sensitivities
  • Assessment of model assumptions vs physical system behaviour

Delivers:

  • Concise technical report with prioritized findings
  • Clear identification of limiting factors and likely root causes
  • Practical next steps for improvement or further investigation

Typical scope: 4 weeks.

Format: Fixed scope, based on available data, fully confidential.

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Optical Architecture & Performance Limits

Understand what your system can really achieve before you commit further

Evaluation of electron optical systems from individual elements through full column configurations, with focus on resolution limits, aberration budgeting, and sensitivity to realistic engineering tolerances.

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Used when:

  • Performance targets are not being met or are uncertain
  • You need an independent view of what limits resolution
  • Design decisions depend on what is physically achievable

Delivers:

  • Clear definition of limiting factors
  • Quantitative performance bounds
  • Practical guidance on where improvement effort matters most

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Aberration Strategy & System-Level Trade-Offs

Choose the right correction approach before complexity locks in

Independent evaluation of aberration mitigation and correction strategies (e.g. multipole, hybrid, phase-plate, or mirror-based), assessed in terms of manufacturability, integration complexity, robustness, and long-term stability within full-system constraints.

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Used when:

  • Multip(o)le correction approaches are being considered
  • Trade-offs between performance and complexity are unclear
  • Long-term system robustness is a concern

Delivers:

  • Comparison of viable correction strategies
  • Identification of hidden risks and integration challenges
  • Guidance aligned with real engineering constraints instead of idealized models

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Phase & Coherence Analysis

Resolve limits that geometric optics alone cannot explain

Wave-optical modelling applied in regimes where geometric approximations break down, including high-resolution, phase-sensitive, and coherent beam operation.

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Used when:

  • System behaviour cannot be explained by ray optics
  • Coherence or phase effects limit achievable performance
  • High-resolution operation reveals unexpected artefacts

Delivers:

  • Identification of wave-optical limiting factors
  • Clarification of coherence-related performance constraints
  • Insight into when further geometric optimization will no longer help

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Instrumentation & Electronics Integration

Ensure optical performance survives real-world implementation

Extension of optical design into stable hardware implementation, addressing voltage stability, noise pathways, mechanical constraints, and practical alignment strategies.

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Used when:

  • A design performs in simulation but not in practice
  • Stability, drift, or noise degrade system performance
  • Implementation details begin to dominate results

Delivers:

  • Identification of non-ideal effects impacting performance
  • Guidance on improving robustness and stability
  • Alignment between optical design and physical system behavior

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How I work with teams

Engagements integrate seamlessly with internal development programs, typically including:

All work performed is executed by your principal consultant, M. A. R. Krielaart, and is handled as confidential, NDA bound, and aligned with existing team workflows, often via regularly scheduled advisory and progress meetings.

M. A. R. Krielaart, Principal consultant

  • PhD (cum laude) at Delft University, specializing in electron phase modulation and quantum electron optical system design, covering theoretical modelling, experimental implementation, electronics development and team supervision.
  • Postdoctoral research at MIT on electron–matter interaction phenomena, including Smith–Purcell radiation for heralded electron-photon sources and tuneable on-chip light sources.
  • Industry collaboration on advanced aberration correction architectures and phase-sensitive optical systems.

Previous work in practice

Quantum electron microscopy - Electron Beam Path Separation

Designed the beam separator, gated deflector, and mirror system for a quantum electron microscope. Positioned the separator to separate incident and outgoing beam paths while maintaining proper field-ray propagation and minimizing trajectory dispersion. Performance simulations and analysis ensured minimal aberration and preserved flexibility for future multi-reflection operation within the mirror system.

Aberration Corrector Design & Trade-Off Analysis

Designed and analysed an aberration corrector for a resolution-critical electron optical system. Conducted tolerance analysis to quantify the impact of machining and assembly deviations on achievable resolution, providing structured trade-offs between fabrication precision and system performance. Solutions were optimized to support both current and potential future iterations of the system while maintaining stability and manufacturability under realistic engineering constraints.

Phase Control via Patterned Electron Mirrors

Studied the effect of topologically patterned mirrors on the phase of reflected electron beams. Analytical modelling of the Schrödinger equation was coupled with numerical solution techniques to quantify how pattern parameters influence phase modulation. Results informed design choices for phase-sensitive beam control.

Why engage an independent consultant?

Early design decisions in complex electron optical systems determine ultimate resolution, stability margins, and integration complexity. Independent advisory can:

This ensures engineering decisions are guided by objective and independent domain expertise without committing internal resources prematurely.

Collaboration Opportunities

I am available for project-based consulting and technical advisory roles in advanced electron beam system development. Engagements are tailored to internal development workflows and focused on performance-critical programs.

Contact me

Please provide your email address and I will reach out shortly to discuss options. For confidentiality, no project details are requested here. You will also receive an instant email containing my contact information for your reference. Or, connect with me on LinkedIn.

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