Domain: Engineering — Nuclear Engineering
Target concept: Nuclear Information Acquisition and Detection

Video generation prompt: Nuclear radiation signal acquisition and storage experimental setup (including a scintillation detector, data acquisition card, computer, and cesium-137 radioactive source). Start the data acquisition card, align the detector with the radioactive source, continuously acquire nuclear radiation pulse signals for 3 seconds, and observe the computer screen.

Evaluation guide:
(i) Target concept: Real-time acquisition and visualization of stochastic nuclear radiation pulses via scintillation detection.
Minimum mechanism: Gamma photons from Cs-137 must interact with scintillator to generate detectable light flashes; photomultiplier must convert light to measurable voltage pulses; acquisition system must digitize and stream pulses to screen as time-ordered waveform without interpolation or simulation.
(ii)Storyline: Frame 1–2: Cesium-137 source and scintillation detector enter view, front-facing and aligned. Frame 3–4: Data acquisition card and computer appear; cable connection becomes visible. Frame 5–6: Acquisition software launches; screen shows idle interface with RUN button. Frame 7–8: RUN activated; screen displays first pulse spike, then additional discrete spikes progressing rightward. Frame 9–10: Pulse train continues with stable baseline and consistent spike morphology; no UI anomalies, no object motion violating alignment, no temporal discontinuity in trace motion.

Manual:
Experimental Procedure
1. Place cesium-137 source and scintillation detector facing each other.
2. Connect detector to data acquisition card; connect card to computer.
3. Launch acquisition software and start 3-second continuous pulse acquisition.
Observation of Experimental Phenomena
Computer screen displays real-time pulse waveform trace: discrete, narrow, positive-going spikes progressing left-to-right along time axis; spike frequency correlates with source proximity.
Summary of Experimental Principles
Nuclear radiation (gamma rays from Cs-137) interacts with scintillator crystal → produces flash of light → detected by photomultiplier → converted to electrical pulse → digitized and stored by acquisition card → visualized as time-domain waveform on computer.

Prompt Grounding rubric:
level_1: None of the four required objects (the scintillation detector, the data acquisition card, the computer, and the cesium-137 source) appear on screen; no alignment between detector and source is shown; nothing suggesting a timed acquisition takes place.
level_2: At least one object appears (e.g., a generic detector or a computer), but the scintillation detector is not recognizable as such, the data acquisition card is missing or unidentifiable, the source is missing or mislabeled as a different isotope, and the detector and source are never shown facing each other.
level_3: All four objects are present and identifiable: a cylindrical scintillation detector with a photomultiplier base, a data acquisition card with visible cable inputs, a computer with an active screen, and a small metallic cesium-137 source capsule with a radiation-trefoil label; the detector and source appear together in the same shot, facing one another; the computer screen shows acquisition software, but no waveform trace with pulses is shown updating.
level_4: All conditions of the 3-point level hold, and in addition the detector's front face and the source capsule are shown directly facing each other; the screen shows an active-looking interface (e.g., a highlighted 'RUN' indicator or 'Acquiring' label) with a time axis and at least one pulse-shaped trace visible, though the trace does not visibly progress or update across the shown frames.
level_5: All conditions of the 4-point level hold, and in addition the detector is connected to the data acquisition card by a visible cable, and the card is connected to the computer; the screen shows the pulse trace actively advancing along the time axis while the active-acquisition indicator stays on; nothing unrelated to the acquisition setup (mislabeled equipment, wrong isotope symbol, unrelated software windows) appears on screen.

Scientific and Causal Correctness rubric:
level_1: The computer screen shows no pulse-like feature at all: it stays blank, frozen, or shows unrelated content (e.g., a spreadsheet or a video clip), with nothing connecting the presence of the source to anything shown on screen.
level_2: The screen does show some waveform-like graphic, but it doesn't look like discrete pulses: e.g., a smooth continuous sine wave or a bar chart; there is no clear connection between the source being in frame and the graphic appearing; the detector is misaligned with, or blocked from, the source while the screen still shows activity.
level_3: The screen shows individual pulse-shaped spikes (narrow, rising sharply above a flat baseline) on a horizontal time axis; these spikes only appear once the detector and source are shown aligned in the same shot; there is no smooth sine-like oscillation and no obvious flatlining or pinned-at-max baseline.
level_4: All conditions of the 3-point level hold, and in addition each spike is a separate, distinguishable event rather than overlapping blobs; no spikes appear before the source is shown in frame or after the source is removed; the detector stays still throughout; the screen shows only the raw pulse trace, without a separate numeric dose-rate or spectrum readout replacing it.
level_5: All conditions of the 4-point level hold, and in addition the pulses are narrow, clearly separated, and all rise in the same (positive) direction with no sideways smearing; the pulses occur at irregular, randomly-spaced intervals along the time axis rather than at even, clock-like spacing (consistent with the random nature of radioactive decay), with no clipping or upside-down pulses; the trace advances steadily left-to-right without looking like a hand-smoothed or pre-rendered animation.

Spatiotemporal Consistency rubric:
level_1: An object (detector, source, or card) jumps from one position to another between two frames with no motion in between; the source appears or disappears without ever entering or leaving the frame; the computer screen's interface suddenly changes to an unrelated state; the room's overall brightness or color cast changes suddenly from one frame to the next; the detector or card appears to bend or split in a way solid equipment cannot.
level_2: One of the objects briefly vanishes for a couple of frames and then reappears; a shadow shows up on the opposite side of an object from one frame to the next with no change in the light source; the detector appears rotated by more than about 45 degrees with no visible motion causing it; the screen's refresh looks uneven: it freezes for a moment, then suddenly jumps ahead.
level_3: The detector and source never drift apart or move relative to each other, and the camera framing doesn't shift, throughout the sequence; the computer screen's content updates smoothly without freezing, jumping, or resetting to a different interface state; none of the objects appears to stretch, bend, or warp in a way that breaks its shape.
level_4: All conditions of the 3-point level hold, and in addition the cable between the detector and the acquisition card stays visible and unbroken across every frame; the screen's trace evolves smoothly with no stutter, tearing, or repeated frame; there is no shift in apparent depth between the equipment in the foreground and whatever is behind it; no sudden change in brightness or contrast makes any object hard to see.
level_5: All conditions of the 4-point level hold, and in addition the detector and cable show no visible shaking or jitter; the cable keeps a natural, consistent sag and shape across frames; the trace on screen advances smoothly left-to-right with no visible jumps or backward warps; there is no ghosting between frames or blur that looks mismatched to how fast anything is actually moving.