Radiation-Hardened Device Qualification Director — Space Launch Systems

The mandate

A launch avionics family uses radiation-hardened control and interface devices qualified on early process lots, but recent beam results show broader single-event distributions and annealing behaviour than the inherited mission analysis assumes. Test laboratories applied different flux, bias and temperature conditions, and system mitigation evidence does not trace cleanly to device modes. The defined problem is to build a mission-representative qualification case without pooling unlike radiation mechanisms into one reassuring margin.

The deliverables are a device and lot genealogy, mission environment translation, total-dose and displacement plan, single-event taxonomy, beam-test matrix, test-setup correlation, mitigation effectiveness evidence, lot-acceptance rules, residual-risk register and qualification dossier. Artefacts must bind device revision, bias, temperature, fluence, flux, angle and anneal history. Every cross-lot inference requires a stated physical rationale and limit.

Four milestones govern five months: inherited evidence and mission-gap baseline by 30 October 2026; approved sample, beam and mechanism plan by 11 December; completed multi-facility testing plus mitigation demonstrations by 29 January 2027; and accepted qualification dossier, lot controls and client-led review by 26 February. Milestone reports preserve null, destructive and contradictory results alongside passing cases.

Acceptance requires radiation specialists to reproduce cross-facility corrections, system engineers to demonstrate mitigation at observed rates, component assurance to approve lot controls and mission leadership to own remaining exposure. The sponsor returns one consolidated technical defect register within six working days. Device survival alone cannot satisfy acceptance when functional interruption, destructive event, recovery time or cumulative degradation is omitted.

The client provides mission environments, device lots, foundry change records, test fixtures, beam access, dosimetry evidence, system models, mitigation firmware and authorised laboratory personnel. It funds agreed samples and destructive testing. The director cannot approve flight, change mission-class requirements, select launch dates or make regulatory representations; accountable client authorities retain those decisions.

Why this is external work

Device, laboratory and system teams each interpret radiation evidence from a valid but partial boundary. Prior supplier commitments also make it difficult for internal reviewers to challenge lot equivalence and inherited margin. An external director can reconcile mechanisms and exit when the client owns an accepted qualification case and repeatable lot controls.

What you will own

• Reconcile device revision, wafer lot, package, bias, temperature, test fixture, beam, dosimetry and anneal genealogy.
• Translate orbit and launch radiation environments into mechanism-specific dose, particle, energy, angle, flux and timing conditions.
• Separate transient, functional-interrupt, latch-up, burnout, gate-rupture, total-dose and displacement effects in evidence and decisions.
• Design beam matrices around mission consequence, physical coverage, sample scarcity, cross-facility comparability and destructive endpoints.
• Correlate mitigation response, reset, redundancy, current limiting and fault management with measured device events.
• Establish lot acceptance, process-change triggers, radiation-assurance maintenance and bounded use restrictions for production.
• Deliver the accepted dossier, unresolved tails, facility correlations, mission assumptions and client-led assurance rehearsal.

Candidate qualifications

• Directed radiation qualification for semiconductor devices used in launch, spacecraft, defence or high-altitude avionics.
• Can evidence a mission conclusion changed after separating unlike single-event or cumulative radiation mechanisms.
• Understands TID, displacement damage, single-event effects, dosimetry, annealing, flux dependence and destructive testing.
• Has reconciled results across beam facilities without obscuring setup, particle and device-lot differences.
• Connected device events to system mitigation and mission consequence rather than relying on component survival alone.
• Worked with foundries and mission assurance while preserving independent disposition of adverse evidence.

Non-negotiables

• Will attend Toulouse, Grenoble, Leuven and Noordwijk laboratory and assurance sessions.
• Has personally dispositioned radiation-hardened device lots using mission-representative beam evidence.
• Accepts milestone rejection when lot, bias, dosimetry, anneal or test-setup custody is incomplete.
• Will disclose foundry, beam-facility, component-vendor and space-programme relationships before engagement.

1. 49 words maximum. Which radiation result changed most after you separated device mode or beam conditions?
2. 49 words maximum. How would you prove a system mitigation covers the observed single-event distribution?
3. 49 words maximum. What evidence justifies extending qualification from one process lot to another?