Porous Ionic Liquid Ion Source Fabrication Refinements and Variable Bean Energy Experiments
Why this work is in the frame
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Bibliographic record
Abstract
This is paper presents new data demonstrating the ability to independently control emission current and beam energy using porous Ionic Liquid Ion Sources (ILIS) as electrospray thruster emitters. Following from previous research at the Massachusetts Institute of Technology where ∞at strips of porous emitters were developed using tungsten substrates, this work employs similar emitters with both and extraction and acceleration grids. Here two ∞at < 1„m porosity tungsten arrays of 20 emitters each were conflgured within an ABS plastic body and aligned with tungsten grids. The emitter tip radii were between 20 and 30„m. By controlling the grids independently, the net current emitted, along with the fraction of emitted current transmitted through the grids as a useful beam were monitored. The results indicated that while downstream acceleration of the beam had little impact on the emitted beam fraction, the ratio of current intercepted by the grids dominated decelerating energies less than 40% of the extracting potential. These experiments provide a baseline for developing constant power, variable speciflc impulse thrusters where high beam current fractions are desirable over a range of beam energies in order to maintain high thruster e‐ciencies. A modifled fabrication process which employs dry photomasks is presented. The technique allows for high regularity between fabricated emitters and provides foundation for future developments of new emitter geometries. Currents per emitted ranged from 10s of nA up to roughly 0:4„A at potentials of approximately 1:6kV to 2:2kV respectively.
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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 it