Eigenmodes of an ion plasma sheath
Bibliographic record
Abstract
Summary form only given. We investigate the structure and stability of transverse (in the sheath plane) eigenmodes of a collisionless ion sheath occurring at the plasma boundary. An ion sheath represents a particular example of nonlinear ion-sound waves, which, in general include solitons and periodic waves structures. All these nonlinear waves can be found by formulating plasma equations in a form of the oscillator eigenvalue problem in a generic nonlinear potential (Sagdeev potential). Solitons and periodic waves correspond to trapped (localized) states, while the sheath solution is an untrapped state with the local maximum as the wall. To investigate the transverse stability and eigenmodes of the sheath solution we employ a method previously used to study transverse oscillations of solitons (e.g. within the Kadomtsev-Petviashvili equation). We have generalized this technique for the sheath solution. We have obtained the dispersion relation for transverse oscillations and found stable eigenmodes with a frequency lower than the ion plasma frequency.
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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) | 0.006 | 0.001 |
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".