Examining Microwave Afterglows in N2 Gas Mixtures Using Spectroscopy and LIF: Application to Surface Cleaning
Bibliographic record
Abstract
Variations of N, H, O and C-atoms density have been determined along the reduced pressure flowing afterglows of microwave Ar-N2-H2 discharges that have been experimented with in Plasmas Labs of Nancy, Montreal, Orsay and Toulouse. In the present chapter, previous experiments in N2-O2, N2 - H2 and N2 - CH4 fulfilled by the LSGS(Nancy), Plasmas Lab (Montreal), LPGP (Orsay), Laplace (Toulouse) and SNPE (Bordeaux) are reported. The active species density is obtained by NO titration for N and O-atoms and by line intensity ratios for the H and C-atoms. A small maximum of N-atom density in the range (0.5-3) 1015cm-3 was observed when a few H2 or CH4 was added to N2 and the C/N ratio was about 10-3 in the afterglow of studied microwave setups. The results obtained by LIF measurements in Orsay and Toulouse Labs are reported for N and H -atoms. By comparing the TALIF and the results of H-atoms density obtained from OES in N2-1%H2 afterglows, it has been chosen the appropriate rate coefficient of the N+H+N2 reaction. The surface cleaning by N and O-atoms has been experimented.
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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 | 0.000 |
| 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) | 0.001 | 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".