Wakefield effects on the beam accelerated in a photo injector: perturbation due to the exit aperture
Bibliographic record
Abstract
The influence of the photoinjector exit aperture on the wakefield generated by the strongly accelerated electron beam, has been theoretically studied in a companion paper. In this communication we study the effects of such a wakefield on the beam, in that propagation stage where the beam approaches the hole and enters it, i.e. the propagation stage where the influence of the photoinjector exit hole must be taken into account. First, the perturbated wakefield map (E, B)(x, t) is shown for various instants, and for photoinjector and beam parameters corresponding to typical values on ELSA, the CEA-Bruyeres-le Chatel high-current, high-brilliance electron beam facility. Then, the effects on the beam quality are studied in terms of emittances, when the beam approaches the hole. These effects are compared to the corresponding ones, previously obtained for a wakefield map where the exit hole perturbation had been neglected.
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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 | 0.001 |
| 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 | 0.001 |
| 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".