{"artifact_id":"L1-084","layer":"L1","title":"Scanning Electron Microscopy (SEM) — secondary-electron surface imaging","domain":"Electron Microscopy","sub_domain":"Surface topography EM","physics_fingerprint":{"L_DAG":3.0,"title":"Scanning Electron Microscopy (SEM) — secondary-electron surface imaging","domain":"Electron Microscopy","carrier":"electron","primitives":["L.excitation.electron_beam","S.scan.raster","D.secondary_electron","int.temporal"],"sub_domain":"Surface topography EM","noise_model":"shot_poisson","problem_class":"linear_inverse","solution_space":"2D_intensity","difficulty_delta":3,"integration_axis":"temporal","sensing_mechanism":"electron_beam_scanning"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 2D intensity is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by the declared priors. Stability is well-conditioned (kappa_eff ~= 8); beam_drift dominates the stability cliff; charging_artifact and the remaining mismatch parameters contribute higher-order bias terms. Photon-shot-noise-limited (poisson counting) sets the irreducible data-fidelity floor, while mild Tikhonov or analytic inversion is sufficient at the nominal Omega point.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"H":2048,"W":2048,"kV":5,"spot_nm":1.5,"pixel_nm":5,"beam_drift":0.0,"peak_electrons":100,"charging_artifact":0.0},"input_format":"measurement_only","problem_class":"sem_se","forward_operator":"sem_se_forward","epsilon_fn_center":"30.0"},"omega_bounds":{"H":[512,8192],"W":[512,8192],"kV":[1,30],"spot_nm":[0.5,10],"pixel_nm":[0.5,100],"beam_drift":[0.0,2.0],"beam_damage":[0.0,0.5],"peak_electrons":[10,10000],"charging_artifact":[0.0,0.3]},"epsilon_bounds":{"psnr_db":[10.0,40.0]},"allowed_problem_classes":["sem_se"],"allowed_omega_dimensions":["H","W","pixel_nm","kV","spot_nm","peak_electrons","beam_drift","charging_artifact","beam_drift","charging_artifact","beam_damage"],"allowed_forward_operators":["sem_se_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":3,"kappa":160,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0xcbcb6c80ecdbef26d5fe95eb5fc64a4e46ba20f8da890e3c0c765008e447d4e6","chain_tx_hash":"0xf1e2014b8c0d1b745ecb106316da297ace1e4887957234a0b911ae7ca83db653","chain_block":41554183}