# 📐  L2 Spec — XRF Tomography Spec

**ID:** `L2-134-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-134`](/artifact/l1/L1-134)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.35 · **Delta tier:** 5
> **⛓ On-chain block:** 41554218

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| H | px | 64 – 2048 |
| K | — | 1 – 30 |
| W | px | 64 – 2048 |
| N view | — | 10 – 1000 |
| Pixel um | µm | 0.1 – 100 |
| E exc kev | — | 5 – 50 |
| Self absorption | — | 0.0 – 0.8 |
| Pileup correction | — | 0.0 – 0.2 |
| Detector live time | — | 0.1 – 1.0 |
| Scatter background | — | 0.0 – 0.3 |
| Beam position jitter | — | 0.0 – 2 |

## 2. Tolerance (ε)

**Type:** `fn`

```
1e-2 + 0.05 * self_absorption + 0.05 * scatter_background + 0.05 * pileup_correction + 0.01 * beam_position_jitter
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.35 |
| Delta tier | 5 |

## 4. Fingerprint

`be284734f0c406141e5c205f1d7ed8b8d6b9ebc57907e64747c01a56176c7b45`

## 5. On-chain Registration

- **Chain hash:** `0x7c0ea4695dc54ce6bbf084153fd8230be5c570743d64e16094d559e22eed8fdb`
- **Chain tx hash:** `0x41ce7baad9a4994dec46e92fc54a14e848d1425232b4a3d5607079cc93d4d69f`
- **Chain block:** `41554218`

---

## File Mapping

This bundle consists of: `L2-134-001.md`, `L2-134-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-134-001.md` | Source of truth — edit this | Human or LLM |
| `L2-134-001.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 `L2-134-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._