ATLAS Liquid Argon Calorimeter Phase-II Upgrade: Technical Design Report
Bibliographic record
Abstract
This Technical Design Report documents plans to upgrade the Liquid Argon calorimeters’ readout electronics for the ATLAS experiment for operation at the High Luminosity LHC. When the High Luminosity LHC begins operations in 2026 it will be able to reach a peak instantaneous luminosity of "7.5\times 10^{34} cm^{-2}s^{-1}", which corresponds to approximately 200 inelastic proton-proton collisions per beam crossing. The new Liquid Argon readout electronics will be operational for more than ten years, during which time the LHC is expected to deliver 4 000 fb"^{−1}" of proton-proton collision data. These requirements are a significant challenge in the design of the new readout system. The design, construction and expected performance of the future readout electronics are presented in detail. These include the results of measurements of prototypes and the plans for their mass production. This document also describes the management of the project, its schedule and major milestones. The costs of the new readout electronics and the collaboration that plans to build it are also presented.
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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 | 0.004 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.003 | 0.002 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.032 | 0.026 |
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".