# 📐 L2 Spec — X-ray Non-Destructive Testing (2D radiography) Mismatch-Only Spec
**ID:** `L2-112-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-112`](/artifact/l1/L1-112)
> **🎯 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 |
| Kv | — | 20 – 450 |
| Scatter | — | 0.0 – 0.4 |
| Pixel um | µm | 1 – 500 |
| Photon count | — | 100 – 100000 |
| Beam hardening | — | 0.0 – 0.3 |
| Thickness variation | — | 0.0 – 0.5 |
| Source intensity drift | — | 0.0 – 0.1 |
## 2. Tolerance (ε)
**Type:** `fn`
```
22.0 + 2.0 * log10(photon_count / 100) - 8.0 * beam_hardening - 6.0 * scatter
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |
## 4. Fingerprint
`4159e1addaaddf7608cb9fe88c1fdefc605b2aed99f02b46f9d8cfe25f2b1c12`
## 5. On-chain Registration
- **Chain hash:** `0xb35f40f94fe452206896241b3e81a5c2e8b26826e7ca324473f1dceab76bb26b`
- **Chain tx hash:** `0x527b4ad260addd370d7049bfd70275096f415f311e49d4d52f87c27871812542`
- **Chain block:** `41554202`
---
## File Mapping
This bundle consists of: `L2-112-001.md`, `L2-112-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-112-001.md` | Source of truth — edit this | Human or LLM |
| `L2-112-001.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 `L2-112-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._