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Fix: CsI(Tl) non-linear response correction + detector calibration overhaul

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Root cause of Am-241 misidentification: the Radiacode 103's CsI(Tl) crystal
shifts low-energy peaks upward (59.5 keV → 71.6 keV for Am-241) due to
non-proportional scintillation response. The model was trained on theoretical
peak positions and couldn't match the shifted real peaks.

Changes:
- Add inverse CsI(Tl) non-linear correction to inference pipeline
  (radiacode_monitor.py, web/config.py, test_detection.py)
  E_apparent = E_true * (1 + 0.37 * exp(-E_true/100))
  Corrects channel mapping so peaks appear at theoretical energies
- Fix energy calibration: DetectorConfig now uses E = 0.33 + 2.97*ch
  with 1023 channels, matching the real detector (was energy_min=20,
  skip_first_channel=True, different channel width)
- Add K-escape peaks for CsI(Tl) iodine X-ray escape (E - 28.5 keV)
- Add asymmetric peak shapes for low-energy tails (< 200 keV)
- Add log1p normalization in dataset and inference (replaces max-norm)
- Add background-subtracted training mode (subtract_background flag)
- Add low-signal augmentation (0.01-5 Bq activities, 30-300s durations)
- Update docker-compose.yml: batch_size=32, duration=30-300s,
  CSI_NONLINEAR_ALPHA/BETA env vars for detect and web
- Web dashboard: apply CsI correction to displayed spectra
- Various UI fixes (Chart.js width, zoom/pan, isotope lines)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Jacquin Antoine
2026-05-21 17:35:22 +02:00
parent 3b4446b181
commit 0847a3fc80
21 changed files with 913 additions and 278 deletions
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web/static/index.html
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@ -4,7 +4,7 @@
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Radiacode 103 — Dashboard</title>
<link rel="stylesheet" href="/static/css/style.css?v=3">
<link rel="stylesheet" href="/static/css/style.css?v=8">
<script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.1/dist/chart.umd.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-annotation@3.0.1/dist/chartjs-plugin-annotation.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/hammerjs@2.0.8/hammer.min.js"></script>
@ -83,12 +83,12 @@
</section>
</main>
<script src="/static/js/isotope_lines.js?v=3"></script>
<script src="/static/js/isotope_lines.js?v=5"></script>
<script src="/static/js/chart_pan.js?v=3"></script>
<script src="/static/js/spectrum.js?v=9"></script>
<script src="/static/js/spectrum.js?v=15"></script>
<script src="/static/js/history.js?v=2"></script>
<script src="/static/js/background.js?v=30"></script>
<script src="/static/js/cps.js?v=7"></script>
<script src="/static/js/background.js?v=34"></script>
<script src="/static/js/cps.js?v=8"></script>
<script src="/static/js/app.js?v=3"></script>
</body>
</html>