Commissioning of a multipass discharge cell for the study of transient molecules of astrophysical interest using the far-IR beamline at the Canadian Light Source
Bibliographic record
Abstract
The main objective of this project was to build, install and test a new direct current discharge multipass gas cell for the Far-Infrared Beamline at the Canadian Light Source (CLS). This cell was designed to generate transient molecules of astrophysical interest and was successfully used to collect high resolution rovibrational spectra of these species in the mid- and far-infrared regions (300 to 6000 cm-1). The first tests involved a study of the discharge spectrum of CS2, a precursor for the formation of astrophysically relevant chain molecules. The spectrum of CS2 discharge showed at least six unique product species and the discharge conditions were optimized for the detection of transient molecules. These first experiments demonstrate that the objective of this project were met and it is now possible to investigate transient molecules at the CLS. Future work will involve the optimization of the production of longer chain molecules so that their far-infrared spectra can be observed for the first time.
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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 | 0.002 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".