Imaging of Defects in Additively Manufactured Alloys Using Betatron X-Rays
Bibliographic record
Abstract
Betatron radiation is a synchrotron-like X-ray emission generated from the oscillations of trapped relativistic electrons during laser wakefield acceleration (LWFA). Betatron sources are broadband keV X-rays with small source sizes and few-femtosecond pulse durations, ideal for high-resolution phase contrast and X-ray imaging of dense materials. Here, we present the characterization (spatial resolution and acquisition time) of the betatron X-rays from different gases to study their ability for high-resolution imaging of micrometer-scale defects in additively manufactured (AM) aluminium-silicon alloys. Characterization of the X-ray source spectrum, spatial resolution, source size and betatron emission length was performed using the Advanced Laser Light Source in Varennes, Canada. Upcoming applications of these sources for high-resolution, high-throughput 3D tomography of porosity evolution of AM alloys under tension will be discussed.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.010 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".