# 📐  L2 Spec — Brillouin Microscopy Peak-Fitting Spec

**ID:** `L2-142-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-142`](/artifact/l1/L1-142)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.55 · **Delta tier:** 5
> **⛓ On-chain block:** 41554230

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| H | px | 32 – 1024 |
| W | px | 32 – 1024 |
| Z | — | 1 – 256 |
| N f | — | 50 – 1024 |
| Tau ms | ms | 1 – 10000 |
| Anisotropy | — | 0.0 – 0.2 |
| Thermal drift | — | 0.0 – 0.1 |
| Rayleigh leakage | — | 0.0 – 0.5 |
| Spectrometer drift | — | 0.0 – 50 |
| Refractive index uncertainty | — | 0.0 – 0.05 |

## 2. Tolerance (ε)

**Type:** `fn`

```
5 + 0.1 * spectrometer_drift + 200 * thermal_drift + 50 * refractive_index_uncertainty + 50 * anisotropy
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.55 |
| Delta tier | 5 |

## 4. Fingerprint

`c431f824471c1effb1d9324e6394017bafcc3f1f02451c14146797b0e862986f`

## 5. On-chain Registration

- **Chain hash:** `0xf02313f7d208a3beee6e60b48587b88a0d37c29c5b1e925651ecd435accd96f4`
- **Chain tx hash:** `0x873998da7f60e32cf1efe5c38c70ac177870974c3e09d3a1f973bccebbba822d`
- **Chain block:** `41554230`

---

## File Mapping

This bundle consists of: `L2-142-001.md`, `L2-142-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-142-001.md` | Source of truth — edit this | Human or LLM |
| `L2-142-001.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 `L2-142-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._