{"schema": "too.foo.history.image-prompt.v1", "slug": "1932-08-02-the-first-positron-is-discovered-by-carl-d-anderson", "release": "4b157fe58dc3a255", "image_key": "1932-08-02-the-first-positron-is-discovered-by-carl-d-anderson", "image_sha256": "64f2f53ca1bc4197332a26e8c4ce643def0222e43d842ec781556e997c139424", "job": "20260827-004333-tier2", "model": "Ideogram 4 (fp8)", "preset": "V4_DEFAULT_20", "steps": 20, "seed": 20260823, "width": 1216, "height": 832, "caption_mode": "json", "caption": {"high_level_description": "Inside Anderson’s magnetized cloud chamber, one thin condensation track rises through a 6 mm lead plate: its broad lower arc ends at the plate and a tighter upper arc begins directly above, recording the energy loss mid-transit. Caltech laboratory, 2 August 1932; close through the chamber’s glass observation window, with a circular blackened-metal chamber wall and matte lead plate filling an off-centre frame, apparatus edges cropped candidly. Both ends of the lead plate rest inside the two bolted brackets, which touch the chamber wall. The lower track terminates at the plate’s underside crossing point; the upper track begins at the corresponding topside point. Both track segments bow in the same direction, with visibly tighter curvature above the plate. The condensation track occupies the vapor volume behind the observation window. The window meets the chamber rim continuously; its upper-left reflection corresponds to the single laboratory lamp. The horizontal lead plate is exactly 6 mm thick. It is 1932-08-02: Laboratory personnel remain beyond the close crop.; Matte lead, blackened steel, glass, worn steel bolts, supersaturated vapor droplets.; Magnetized expansion cloud chamber photographed through a glass observation window using 1932 large-format camera optics. The roughly 63 MeV lower segment has broad curvature; after crossing the lead, the roughly 23 MeV upper segment curves more sharply.", "style_description": {"aesthetics": "Forensic, quiet, decisive. Documentary photographic realism: subtle film grain, believable wear on every material, candid imperfect framing.", "lighting": "One broad laboratory lamp 35 degrees above camera-left casts soft shadows down-right and creates the single upper-left window reflection.", "photo": "50mm, f/4, 0.8 m, Close documentary scientific view, chamber centre shifted left, upper and right rim slightly cropped; track crossing sharp while near rim falls softly out of focus.", "medium": "photograph, High-contrast monochrome scientific exposure with restrained grain and shallow optical depth.", "color_palette": ["#1E1913", "#4A3B28", "#8A7350", "#C9B892", "#2B2B2A"]}, "compositional_deconstruction": {"background": "Caltech laboratory, 2 August 1932; close through the chamber’s glass observation window, with a circular blackened-metal chamber wall and matte lead plate filling an off-centre frame, apparatus edges cropped candidly. One broad laboratory lamp 35 degrees above camera-left casts soft shadows down-right and creates the single upper-left window reflection.", "elements": [{"type": "obj", "bbox": [60, 70, 960, 930], "desc": "One circular blackened-steel chamber encloses the vapor volume; its inner rim has three darkened screws and a rubbed patch at lower left."}, {"type": "obj", "bbox": [475, 105, 520, 900], "desc": "One matte lead strip exactly 6 mm thick spans the chamber horizontally, its surface slightly uneven and its forward edge sharply defined."}, {"type": "obj", "bbox": [500, 350, 920, 575], "desc": "A hair-thin white condensation trail rises from lower centre in a broad smooth arc, reaching one crossing point beneath the lead plate."}, {"type": "obj", "bbox": [145, 450, 480, 720], "desc": "The same trail resumes above that crossing point and bows in the same direction with a distinctly smaller curvature radius."}, {"type": "obj", "bbox": [90, 100, 930, 900], "desc": "Fine grey droplets occupy the chamber depth, sparse around the track and softly blurred near the curved wall."}, {"type": "obj", "bbox": [440, 65, 555, 940], "desc": "Two machined steel brackets hold opposite plate ends; each bracket is fixed to the chamber wall by two worn bolts."}, {"type": "obj", "bbox": [35, 40, 980, 960], "desc": "The circular glass window sits in the outer rim; one faint rectangular lamp reflection occupies its upper-left edge."}]}}, "rendered_input": "{\"high_level_description\": \"Inside Anderson’s magnetized cloud chamber, one thin condensation track rises through a 6 mm lead plate: its broad lower arc ends at the plate and a tighter upper arc begins directly above, recording the energy loss mid-transit. Caltech laboratory, 2 August 1932; close through the chamber’s glass observation window, with a circular blackened-metal chamber wall and matte lead plate filling an off-centre frame, apparatus edges cropped candidly. Both ends of the lead plate rest inside the two bolted brackets, which touch the chamber wall. The lower track terminates at the plate’s underside crossing point; the upper track begins at the corresponding topside point. Both track segments bow in the same direction, with visibly tighter curvature above the plate. The condensation track occupies the vapor volume behind the observation window. The window meets the chamber rim continuously; its upper-left reflection corresponds to the single laboratory lamp. The horizontal lead plate is exactly 6 mm thick. It is 1932-08-02: Laboratory personnel remain beyond the close crop.; Matte lead, blackened steel, glass, worn steel bolts, supersaturated vapor droplets.; Magnetized expansion cloud chamber photographed through a glass observation window using 1932 large-format camera optics. The roughly 63 MeV lower segment has broad curvature; after crossing the lead, the roughly 23 MeV upper segment curves more sharply.\", \"style_description\": {\"aesthetics\": \"Forensic, quiet, decisive. Documentary photographic realism: subtle film grain, believable wear on every material, candid imperfect framing.\", \"lighting\": \"One broad laboratory lamp 35 degrees above camera-left casts soft shadows down-right and creates the single upper-left window reflection.\", \"photo\": \"50mm, f/4, 0.8 m, Close documentary scientific view, chamber centre shifted left, upper and right rim slightly cropped; track crossing sharp while near rim falls softly out of focus.\", \"medium\": \"photograph, High-contrast monochrome scientific exposure with restrained grain and shallow optical depth.\", \"color_palette\": [\"#1E1913\", \"#4A3B28\", \"#8A7350\", \"#C9B892\", \"#2B2B2A\"]}, \"compositional_deconstruction\": {\"background\": \"Caltech laboratory, 2 August 1932; close through the chamber’s glass observation window, with a circular blackened-metal chamber wall and matte lead plate filling an off-centre frame, apparatus edges cropped candidly. One broad laboratory lamp 35 degrees above camera-left casts soft shadows down-right and creates the single upper-left window reflection.\", \"elements\": [{\"type\": \"obj\", \"bbox\": [60, 70, 960, 930], \"desc\": \"One circular blackened-steel chamber encloses the vapor volume; its inner rim has three darkened screws and a rubbed patch at lower left.\"}, {\"type\": \"obj\", \"bbox\": [475, 105, 520, 900], \"desc\": \"One matte lead strip exactly 6 mm thick spans the chamber horizontally, its surface slightly uneven and its forward edge sharply defined.\"}, {\"type\": \"obj\", \"bbox\": [500, 350, 920, 575], \"desc\": \"A hair-thin white condensation trail rises from lower centre in a broad smooth arc, reaching one crossing point beneath the lead plate.\"}, {\"type\": \"obj\", \"bbox\": [145, 450, 480, 720], \"desc\": \"The same trail resumes above that crossing point and bows in the same direction with a distinctly smaller curvature radius.\"}, {\"type\": \"obj\", \"bbox\": [90, 100, 930, 900], \"desc\": \"Fine grey droplets occupy the chamber depth, sparse around the track and softly blurred near the curved wall.\"}, {\"type\": \"obj\", \"bbox\": [440, 65, 555, 940], \"desc\": \"Two machined steel brackets hold opposite plate ends; each bracket is fixed to the chamber wall by two worn bolts.\"}, {\"type\": \"obj\", \"bbox\": [35, 40, 980, 960], \"desc\": \"The circular glass window sits in the outer rim; one faint rectangular lamp reflection occupies its upper-left edge.\"}]}}", "prompt_sha256": "5e5b0cc51b2af033059ff68c9afa0567dc02787ff9e2cda34b06773c11accb44"}