{"artifact_id":"L1-087","layer":"L1","title":"Scanning TEM (STEM) — HAADF / BF imaging with convergent beam","domain":"Electron Microscopy","sub_domain":"Atom-resolution Z-contrast imaging","physics_fingerprint":{"L_DAG":3.5,"title":"Scanning TEM (STEM) — HAADF / BF imaging with convergent beam","domain":"Electron Microscopy","carrier":"electron","primitives":["L.illumination.convergent_probe","S.scan.raster","D.annular_detector","int.temporal"],"sub_domain":"Atom-resolution Z-contrast imaging","noise_model":"shot_poisson","problem_class":"linear_inverse","solution_space":"2D_intensity","difficulty_delta":5,"integration_axis":"temporal","sensing_mechanism":"convergent_electron_probe"},"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 moderately conditioned (kappa_eff ~= 18); probe_aberration dominates the stability cliff; scan_distortion and the remaining mismatch parameters contribute higher-order bias terms. Photon-shot-noise-limited (poisson counting) sets the irreducible data-fidelity floor, while TV / wavelet-sparsity / deep priors stabilise recovery at the ill-conditioned end of Omega.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"H":2048,"W":2048,"kV":200,"pixel_A":0.5,"beam_damage":0.0,"peak_electrons":200,"scan_distortion":0.0,"probe_aberration":0.0},"input_format":"measurement_only","problem_class":"stem_haadf","forward_operator":"stem_haadf_forward","epsilon_fn_center":"28.0"},"omega_bounds":{"H":[512,8192],"W":[512,8192],"kV":[60,300],"pixel_A":[0.1,5.0],"beam_damage":[0.0,0.5],"peak_electrons":[5,5000],"scan_distortion":[0.0,0.05],"probe_aberration":[0.0,0.3]},"epsilon_bounds":{"psnr_db":[10.0,40.0]},"allowed_problem_classes":["stem_haadf"],"allowed_omega_dimensions":["H","W","pixel_A","kV","probe_aberration","scan_distortion","peak_electrons","beam_damage","probe_aberration","scan_distortion","beam_damage"],"allowed_forward_operators":["stem_haadf_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":5,"kappa":360,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x3de9b42148752d3c7d632cad5be3635229b880185b8c96446c341163a0c20627","chain_tx_hash":"0xad87a307345cbf69d564079e654446cd8b23316152b5bf0e7c765061f715d570","chain_block":41554184}