{"artifact_id":"L1-093","layer":"L1","title":"Focused Ion Beam SEM (FIB-SEM) — serial sectioning 3D imaging","domain":"Electron Microscopy","sub_domain":"Ion-mill serial sectioning + SEM","physics_fingerprint":{"L_DAG":4.0,"title":"Focused Ion Beam SEM (FIB-SEM) — serial sectioning 3D imaging","domain":"Electron Microscopy","carrier":"electron","primitives":["L.ion_milling","L.excitation.electron_beam","S.scan.raster","S.scan.axial","int.temporal"],"sub_domain":"Ion-mill serial sectioning + SEM","noise_model":"shot_poisson","problem_class":"linear_inverse","solution_space":"3D_intensity","difficulty_delta":5,"integration_axis":"axial","sensing_mechanism":"fib_milling_sem"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 3D 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 ~= 15); milling_step_variance dominates the stability cliff; curtain_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,"Z":500,"kV":2,"pixel_nm":5,"z_step_nm":5,"peak_electrons":100,"curtain_artifact":0.0,"z_alignment_error":0.0,"milling_step_variance":0.1},"input_format":"measurement_only","problem_class":"fibsem_serial_section","forward_operator":"fibsem_serial_section_forward","epsilon_fn_center":"26.0"},"omega_bounds":{"H":[512,4096],"W":[512,4096],"Z":[50,2000],"kV":[1,5],"charging":[0.0,0.3],"pixel_nm":[1,50],"z_step_nm":[1,50],"peak_electrons":[10,2000],"curtain_artifact":[0.0,0.3],"z_alignment_error":[0.0,2.0],"milling_step_variance":[0.0,0.3]},"epsilon_bounds":{"psnr_db":[10.0,40.0]},"allowed_problem_classes":["fibsem_serial_section"],"allowed_omega_dimensions":["H","W","Z","pixel_nm","z_step_nm","kV","peak_electrons","milling_step_variance","curtain_artifact","z_alignment_error","milling_step_variance","curtain_artifact","charging","z_alignment_error"],"allowed_forward_operators":["fibsem_serial_section_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":5,"kappa":300,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x80f4a2109835df73732e37f92e02cf5cc46d78a0eb835ca70932f1577d37e1bf","chain_tx_hash":"0xda3d0c7f6cab8c00e7ebd91388ab6396c4bcce778344a6f150036d92c7cbaf13","chain_block":41554185}