Analytical Description of the Time-dependent Perpendicular Transport of Energetic Particles
Bibliographic record
Abstract
Abstract A fundamental problem in plasma and astrophysics is the motion of energetic and electrically charged particles through a magnetized plasma, e.g., cosmic rays propagating through the interplanetary or interstellar medium. In particular, the motion of particles across a large-scale or guide field is difficult to describe analytically. Recently, an advanced nonlinear theory for perpendicular transport was developed. The theory shows good agreement with simulations and can be used for a variety of synthetic turbulence models. An interesting feature of the latter theory is that it allows for a full time-dependent description of perpendicular transport, including the initial ballistic motion, sub-diffusion, and the recovery of diffusion as soon as there is transverse complexity of the magnetic field. It is the purpose of the current paper to use this theory to derive analytical forms of the time-dependent perpendicular diffusion parameter for different cases. This is useful for a variety of applications, such as studies of shock acceleration and solar modulation.
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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) | 0.000 | 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) | 0.000 | 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".