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All gates · breeder · L2 · turbulence
Validator · Gate BR-L2-A18c

Cross-scale linear γ(kᵧ) spectrum, NT vs PT

BR-L2-A18creproducedverification card freeze 2026-08-27

Frozen result

suppression_min
31%
suppression_max
60%
ky_min
0.1
ky_max
6.0
mu
400

What was computed

Linear CGYRO growth-rate spectrum sweeping kᵧ from the ion scale into the electron band for NT vs PT. NT γ is 31–60% below PT at every resolved kᵧ (0.1–6.0), so the quiet-basin advantage holds across the whole linear spectrum (kᵧ ≥ 10 excluded as unconverged).

Linear γ(kᵧ) spectrum — NT vs PT

Cross-scale linear γ(kᵧ) — NT vs PT γ (cs/a) kᵧ (ρ_s units, log) 0.000.420.831.251.670.10.20.30.50.71246 NT (δ=−0.30) PT (δ=+0.30)
kᵧNT γPT γNT below PT
0.10.03690.066044%
0.20.06900.121043%
0.30.04390.109960%
0.50.07020.101231%
0.70.14390.225036%
10.21050.420950%
20.55500.964242%
41.00461.542335%
60.59211.390957%

NT γ is 31–60% below PT at every resolved kᵧ from the ion scale into the low-electron band — the quiet-basin advantage holds across the whole linear spectrum. Honest exclusion: kᵧ ≥ 10 is flagged UNCONVERGED (short integration time t_final, non-physical γ) and is left out of the plot and the claim; only the converged kᵧ = 0.1–6.0 band is used.

Reproduce this

# Reproduce BR-L2-A18c against the frozen record
pip install kronos-toolkit   # github.com/KronosFE/kronos-toolkit
python -c "from kronos_toolkit.verify import run_regression; run_regression()"
# BR-L2-A18c is anchored in the 2026-08-27 freeze spine (verdict: reproduced).