MODE-3: Pink-mode per-energy `m3` + table-X positions confirmed + completed (all 4 energies); stripe-to-position map below; this is the "data half" of MIRROR-1 / cora#259

[decarlof]

MODE-3: Cora's partial table is correct and complete. Pulled the live values from energy2bm.json store_0 directly; nothing missing from cora's snapshot.

Pink per-energy mirror table (confirmed + completed)

Pink energy	m3 (m1_horizontal / 2bma:m3)	m1mox (2bma:m1)	m1m2x (2bma:m4)
30.000 keV	3.039 mm	8.0 mm	8.0 mm
40.000 keV	13.0 mm	10.0 mm	10.0 mm
50.000 keV	39.0 mm	10.0 mm	10.0 mm
60.000 keV	49.0 mm	29.0 mm	29.0 mm

Mirror angle (m1angl) is constant at 2.615 mrad across all 4 Pink energies (and all 6 Mono energies); m1avg constant at 0.0 mm. The per-Pink variation is purely the lateral m3 move and the coordinated table-X extension (which jumps from 10 to 29 mm at the 60 keV row).

Stripe-to-position map (the data half of MIRROR-1)

The full stripe-to-position map with d-spacings and Bragg-resonance cross-check is the body of MIRROR-1 / cora#259. Distilled for MODE-3:

Stripe	Coating	d-spacing	Active at m3	Pink energy	Bragg resonance (or cutoff)
a	5 nm Pt single-layer	n/a	1.0 mm (Mono) / 3.039 mm (Pink 30)	Mono (held) + Pink 30	Pt critical-angle cutoff ~ 21 keV; broadband below
b	W(1.2 nm) / Si(5.37 nm) × 50	6.57 nm	13.0 mm	Pink 40	calc 36 keV
c	W(1.2 nm) / Si(3.56 nm) × 50	4.76 nm	39.0 mm	Pink 50	calc 49.8 keV
d	W(1.2 nm) / Si(2.73 nm) × 50	3.93 nm	49.0 mm (+ table-X = 29 mm)	Pink 60	calc 60.3 keV

Bragg condition computed at the operational mirror angle θ = 2.615 mrad (sin θ = 0.00261) using λ = 2 d sin θ. Calc resonance matches the calibrated Pink energy to <1 % for stripes c and d, ~10% for stripe b (slight detuning), and stripe a (Pt) is broadband and just past the critical-angle cutoff at 30 keV.

Why table-X jumps at 60 keV: 2bma:m3 alone doesn't have enough X travel to reach stripe d at the substrate edge — the optical-table X support stages (m1 and m4, mapped to m1mox and m1m2x) extend the substrate's reachable X range by translating the entire mirror assembly. This is documented as a warning in the [Mirror M1 stripe selector block of item_020.rst](https:/
/docs2bm.readthedocs.io/en/latest/source/manual/item_020.html#mirror-m1) (latest commit).

Cross-check with cora's existing partial table

Cora's question listed: "30 keV: m3 3.039, table X 8/8; 40: 13.0, 10/10; 50: 39.0, 10/10; 60: 49.0, 29/29 mm" — this is an exact match to the live JSON. Nothing to correct or complete; the table cora had was already authoritative. The new information is the stripe-to-position assignment (which the cora question explicitly flagged as also needed, calling it "the data half of M
IRROR-1") and the Bragg-physics rationale that confirms the assignments.

What about Mono?

For completeness — Mono mode holds m3 = 1.0 mm, m1mox = m1m2x = 8.0 mm, m1angl = 2.615 mrad across all 6 calibrated Mono energies. Always stripe a (Pt). See MIRROR-1 / cora#259 for the Mono / Pink split rationale.

CORA-side application

Cora's existing assumption ("partial pink m3 and table-X positions from the page; stripe-to-label map not on file") promotes to:

• Confirmed Pink-mode 4-energy curve for m3 (m1_horizontal) and the coordinated m1mox / m1m2x pair. Same shape as the per-Pink-energy entries cora is building for other axes from ENERGY-3 / cora#252.
• Stripe-to-label map as a static field on the Mirror M1 Asset (4 stripes, each with d-spacing, m3-position, table-X-requirement, and the calibrated energy at which it's active). The map is now in item_020.rst per the MIRROR-1 commit; cora can copy directly from there.
• m1mox / m1m2x co-movement: model these as a coordinated pair driven by the energy-change IOC together with m3; not separately operator-tunable in the operational flow.

Downstream alignment

The Mirror M1 in-vacuum stripe selector block in item_020.rst (commit a005f1c) carries the stripe-to-position map + the table-X coordination annotation + the Mono-held / Pink-swept split — same content as this ticket. The [Composite IOCs section](https://docs2bm.readthedocs.io/en/latest/source/manual/it
em_020.html#composite-iocs) at ~lines 2218-2240 carries the same Pink per-energy table for reference.

Cross-references

• MIRROR-1 / cora#259 — the parent question; full physics analysis and Bragg cross-check live there.
• ENERGY-3 / cora#252 — saved-table mechanism (the values above come from energy2bm.json store_0).
• ENERGY-6 / cora#255 — DMM substrate stripes (independent question; the DMM has its own two stripes that are separate from the mirror's four).
• [MODE-1 / cora#TBD] — the two beam modes and their energy menus (Pink menu = these 4 energies).
• [MODE-2 / cora#TBD] — the IOC switching mechanism (which writes the m3 / m1mox / m1m2x values from the table above on every Pink-mode energy change).

Net

MODE-3 answer: table confirmed + complete (m3 = 3.039 / 13 / 39 / 49 mm at 30 / 40 / 50 / 60 keV; table-X = 8 / 10 / 10 / 29 mm at same; mirror angle constant 2.615 mrad). Stripe-to-label map: stripe a at 30 keV, b at 40 keV, c at 50 keV, d at 60 keV (the d-spacing-and-Bragg analysis is in MIRROR-1 / cora#259). Mono