# 📐  L2 Spec — Electronic Portal Imaging (EPID) Mismatch-Only Spec

**ID:** `L2-053-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-053`](/artifact/l1/L1-053)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41552979

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| H | px | 512 |
| W | px | 512 |
| Mu | — | 0.1 – 200 |
| Scatter | — | 0.0 – 0.5 |
| Pixel mm | mm | 0.1 – 2.0 |
| Mv energy | — | 4 – 18 |
| Optical glare | — | 0.0 – 0.3 |
| Panel saturation | — | 0.0 – 0.3 |
| Beam energy drift | — | 0.0 – 0.05 |

## 2. Tolerance (ε)

**Type:** `fn`

```
17.0 + 2.0 * log10(MU / 0.1) - 8.0 * scatter - 6.0 * optical_glare
```

## 3. Difficulty

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

## 4. Fingerprint

`ee15c6bac83a5426661a39bbb7956a644c895afe532f14983bc7c3b0292fb074`

## 5. On-chain Registration

- **Chain hash:** `0x813e1242521ae6089fcc2101e985cadaec92d4aa853bae3304108bd04f313e53`
- **Chain tx hash:** `0x5e47dd78d986a26a3aa7401664098934ef86462910b47bae056f125bd1d456e2`
- **Chain block:** `41552979`

---

## File Mapping

This bundle consists of: `L2-053-001.md`, `L2-053-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-053-001.md` | Source of truth — edit this | Human or LLM |
| `L2-053-001.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 `L2-053-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._