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Record W2073471015 · doi:10.1117/12.689996

Canadian TeraWatt portable laser

2006· article· de· W2073471015 on OpenAlexaffabout
Marc Châteauneuf, Jacques Dubois

Bibliographic record

VenueProceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2006
Typearticle
Languagede
FieldPhysics and Astronomy
TopicGyrotron and Vacuum Electronics Research
Canadian institutionsDefence Research and Development Canada
Fundersnot available
KeywordsLaserFilamentationOpticsBeam (structure)Gas compressorPulse (music)Materials scienceComputer sciencePhysics

Abstract

fetched live from OpenAlex

Defence Research & Development Canada (DRDC) has recently acquired a Terawatt laser system that will be mounted in a portable container. A class 100,000 clean room will be inserted in the container to maintain the ideal conditions for the laser operation. The compact laser system stands on a 1.25m x 2.5m optical table. The pulse energy at the output of the compressor is higher than 250 mJ and the pulse width output beam lower than 50 fs resulting in a peak power greater than 5 TW. Although the laser system is portable which allows its deployment for test fields on multi-kilometer ranges, a special building will be constructed to efficiently use its capabilities. While the container will seat inside a garage, it will be possible to steer the laser beam toward a well confined 200 m exterior range, or toward a class 100,000 laboratory. The primary objectives of the use of this laser are to study the beam filamentation and the generation of high energy THz waves.

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 machine prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.001
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.431
Threshold uncertainty score0.866

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.001
Meta-epidemiology (narrow)0.0010.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0020.003
Science and technology studies0.0040.001
Scholarly communication0.0010.001
Open science0.0020.001
Research integrity0.0010.002
Insufficient payload (model declined to judge)0.0430.007

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.

Opus teacher head0.008
GPT teacher head0.231
Teacher spread0.223 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designBench or experimental
Domainnot available
GenreEmpirical

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".

Quick stats

Citations2
Published2006
Admission routes2
Has abstractyes

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Same venueProceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIESame topicGyrotron and Vacuum Electronics ResearchFrench-language works237,207