# 📐  L2 Spec — Neutron Tomography Spec

**ID:** `L2-130-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-130`](/artifact/l1/L1-130)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41554217

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| H | px | 128 – 4096 |
| W | px | 128 – 4096 |
| N proj | — | 10 – 2000 |
| L over d | — | 50 – 2000 |
| Pixel um | µm | 5 – 500 |
| Motion blur | — | 0.0 – 5.0 |
| Beam hardening | — | 0.0 – 0.3 |
| Limited angles | — | 0 – 120 |
| Scatter fraction | — | 0.0 – 0.3 |
| Flux inhomogeneity | — | 0.0 – 0.2 |

## 2. Tolerance (ε)

**Type:** `fn`

```
2e-3 + 0.02 * beam_hardening + 0.02 * scatter_fraction + 0.01 * (limited_angles/60) + 0.01 * motion_blur
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |

## 4. Fingerprint

`04325875c3a7cd25cc240b3af38c9e5dc42e5a910e296b79bf6daf0f0b6fd394`

## 5. On-chain Registration

- **Chain hash:** `0x8ced2603e28167495f878d51db44420780f442fa63ae29ff83f1024b88a5c1c4`
- **Chain tx hash:** `0xa3149a2f8fadb26e47ebae18b84ca02a9fddea0f92517b61a4ad66f53c0187ab`
- **Chain block:** `41554217`

---

## File Mapping

This bundle consists of: `L2-130-001.md`, `L2-130-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-130-001.md` | Source of truth — edit this | Human or LLM |
| `L2-130-001.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 `L2-130-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._