Generation of a long uniform low-temperature RF discharge in helium up to atmospheric pressure
Bibliographic record
Abstract
A long uniform low-temperature discharge is achieved inside a 1 mm radius fused silica tube using plane parallel linear electrodes. At a driving frequency of 13.56 MHz, a pure helium discharge is generated from 10 Torr to atmospheric pressure without any gas flow. Depending on the applied power and pressure, the discharge occurs either in the Ω or in the γ mode. As long as the gas flow is zero, the discharge shows no gradient along the electrodes. Consequently, the length of the discharge is only limited by the axial dimension of the electrodes. As the pressure increases, the Ω to γ transition occurs at higher and higher power densities. The breakdown voltage is minimum at 75 Torr with a power density down to 0.1 W cm−3. However, below 20 Torr, charged particle losses become very important so that the breakdown and maintaining voltages increase drastically. Regardless of the pressure, the gas temperature is found to always lie between 300 and 520 K.
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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".