Characteristics of an ion beam in the figuring process on an optical ultra-low expansion glass surface
Bibliographic record
Abstract
In this study, an ion source figured out the surface of a glass-ceramic material with an ultra-low thermal expansion coefficient for space optical elements. The investigation of the single-point, line, and square figuring patterns assessed the detailed characteristics of the ion beam. At a fixed ion beam current and processing time, a beam voltage of 600 V led to the greatest removal depth with the narrowest full width at half-maximum (FWHM). The surface roughness under different beam voltages was also examined and discussed. Line figuring with an ion beam voltage of 600 V and a one-dimensional sample moving speed of 0.25 mm/s exhibited a maximum depth removal rate of 19.71 nm/min after being polished 15 times. Two-dimensional square figuring was performed to polish a plane mirror with a diameter of 60 mm, and it successfully reduced its surface’s peak-to-valley value to 18 nm due to the melting heat phenomenon of the glass-ceramic material in ion beam figuring (IBF).
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".