{"artifact_id":"L1-116","layer":"L1","title":"Terahertz Imaging (0.1-10 THz time-domain / CW)","domain":"Industrial Inspection","sub_domain":"THz non-ionizing NDT for dielectrics","physics_fingerprint":{"L_DAG":3.3,"title":"Terahertz Imaging (0.1-10 THz time-domain / CW)","domain":"Industrial Inspection","carrier":"photon","primitives":["L.thz_source","L.transmit_sample","D.thz_detector","int.spectral"],"sub_domain":"THz non-ionizing NDT for dielectrics","noise_model":"gaussian","problem_class":"linear_inverse","solution_space":"2D_complex_permittivity","difficulty_delta":5,"integration_axis":"spectral","sensing_mechanism":"terahertz_time_domain"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 2D complex permittivity 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 ~= 14); water_absorption dominates the stability cliff; scattering_at_defects and the remaining mismatch parameters contribute higher-order bias terms. Additive gaussian thermal/electronic noise 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":256,"W":256,"N_freq":512,"SNR_dB":25,"f_THz_range":[0.1,3.0],"dispersive_media":0.0,"water_absorption":0.0,"scattering_at_defects":0.0},"input_format":"measurement_only","problem_class":"thz_tds","forward_operator":"thz_tds_forward","epsilon_fn_center":"22.0"},"omega_bounds":{"H":[64,1024],"W":[64,1024],"N_freq":[64,2048],"SNR_dB":[5.0,40.0],"dispersive_media":[0.0,0.5],"water_absorption":[0.0,0.5],"power_fluctuation":[0.0,0.2],"scattering_at_defects":[0.0,0.3]},"epsilon_bounds":{"psnr_db":[5.0,40.0]},"allowed_problem_classes":["thz_tds"],"allowed_omega_dimensions":["H","W","N_freq","f_THz_range","SNR_dB","water_absorption","scattering_at_defects","dispersive_media","water_absorption","scattering_at_defects","dispersive_media","power_fluctuation"],"allowed_forward_operators":["thz_tds_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":5,"kappa":280,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x839cd1b98c3b3cbdbacaeaa4d3d04a75a42c879d3fceb2de3e4f5af6d94feb8a","chain_tx_hash":"0x836aca69bc1e555bfa41b3bb9763e89c14834f8937db6d60ce16951a4e4bbb5c","chain_block":41554200}