TR-000002 12 kW Hall thruster erosion characterisation

IN SCHEDULE EPVF-1 — Electric Propulsion Vacuum Facility 1 (critical hazard)

Review progress

Principal investigator: N. Beaumont
Organisation code: MSD-11
Requested window: 2027-03-15 to 2027-05-30
Summary: Long-duration wear test measuring discharge-channel erosion and plume divergence at three throttle points, with in-situ profilometry between segments.
Hazard notes: Xenon under pressure, 600 V discharge supply, and a beam dump reaching 700 K. Cryopanel regeneration is a controlled evolution.

No action available to you. This request is at Scheduling Confirmation; it cannot be decided at Safety Review.

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Every decision ever taken on this request. Rows are append–only; nothing here is edited or deleted.
#	Gate	Decision	Reviewer	Rationale	Recorded
1	Safety Review	APPROVE	s.okafor	Hazard analysis reviewed against the facility safety permit. Controls are adequate as written.	2026-07-26 19:04
2	Facility Readiness Review	APPROVE	m.tran	Test cell configuration, instrumentation list and calibration records confirmed against the request.	2026-07-26 19:04

Sequence intact. 4 events, sequence 1–4, no gaps.

Append–only activity log. The sequence number is unique per request, so a removed row is detectable.
#	Event	Actor	Detail	Recorded
1	CREATED	N. Beaumont	Request drafted for 12 kW Hall thruster erosion characterisation.	2026-07-26 19:04
2	SUBMITTED	N. Beaumont	Entered Safety Review.	2026-07-26 19:04
3	GATE_APPROVED	s.okafor	Safety Review: APPROVE.	2026-07-26 19:04
4	GATE_APPROVED	m.tran	Facility Readiness Review: APPROVE.	2026-07-26 19:04