Temperature dependence of pump coupling in two-plasmon decay instability of an electromagnetic wave in homogeneous fluid plasmas
Bibliographic record
Abstract
We have re-examined the pump-coupling term of the growth rate, in the fluid-Maxwell theory for the weak-damping limit of the two-plasmon decay instability of an electromagnetic wave (pump) in a homogeneous plasma. We found that the maximum pump coupling is obtained as (k0v0/4)(2TL/T−1) for electron temperatures T exceeding TL[≡(2/9)(1−4n/nc)(mc2)]. The well-known result for the pump coupling as k0v0/4 is only valid for T<TL. We found that the configuration of electron plasma waves is described by a lemniscate (an 8-shaped curve) for T>TL and by a hyperbola for T<TL. Thus, the pump coupling is reduced by electron heating and vanishes at the temperature equal to 2TL. The temperature-dependent pump coupling can occur even for a relatively cold plasma because the boundary temperature TL can be small if the electron density n is sufficiently close to the quarter critical (nc/4). Here, k0 is the pump wavenumber, v0 is the velocity amplitude of an electron oscillating under the pump electric field, nc(≡ω02m/4πe2) is the critical density, m is the electron particle mass, c is the speed of light in free space, ω0 is the pump angular frequency, and e is the electron particle charge.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.000 | 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".