# 📐 L2 Spec — Industrial Computed Tomography (high-res x-ray CT for NDT) Mismatch-Only Spec
**ID:** `L2-111-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-111`](/artifact/l1/L1-111)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41554202
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 512 – 8192 |
| W | px | 512 – 8192 |
| Z | — | 64 – 4096 |
| Kv | — | 20 – 450 |
| Scatter | — | 0.0 – 0.4 |
| Pixel um | µm | 0.5 – 500 |
| Misalignment | — | 0.0 – 5.0 |
| N projections | — | 180 – 4320 |
| Ring artifact | — | 0.0 – 0.2 |
| Beam hardening | — | 0.0 – 0.3 |
| Photon count per ray | — | 100 – 100000 |
## 2. Tolerance (ε)
**Type:** `fn`
```
20.0 + 2.0 * log10(photon_count_per_ray / 100) - 10.0 * beam_hardening - 8.0 * scatter - 0.5 * misalignment
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |
## 4. Fingerprint
`5ff9c277568e3c5d2c21a4f2ea8875c1c432b111dddff25a791aff6da492e005`
## 5. On-chain Registration
- **Chain hash:** `0x9abdc898aa9f8051bafe1434a39f50931cdb5661be396131be247241d01a65aa`
- **Chain tx hash:** `0xeadd0d60172f60baf61a2d98cf36dec2e49bf2d8bb9f7c8100b2d9ab77d00a1f`
- **Chain block:** `41554202`
---
## File Mapping
This bundle consists of: `L2-111-001.md`, `L2-111-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-111-001.md` | Source of truth — edit this | Human or LLM |
| `L2-111-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-111-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._