X-ray emission from femtosecond laser micromachining
Bibliographic record
Abstract
Summary form only given. Ultrafast lasers are rapidly becoming important tools in the micromachining and microprocessing of solids. Extremely short laser light pulses in the femtosecond regime lead to qualitatively different interactions with solids compared with light pulses of much longer duration. Pulse energies from high-repetition-rate solid state lasers deployed in femtosecond laser machining commonly range from /spl sim/0.1 /spl mu/J to /spl sim/1 mJ; with typical repetition rates in the 1-250 kHz regime. Focussing these light pulses to small spot sizes lead to very high peak intensities (/spl sim/10/sup 14/-10/sup 16/ W/cm/sup 2/), even for relatively compact (amplified) micromachining lasers. The characterization of hard photon emission, including in the X-ray region, is important for laser plasma characterization as well as in terms of workplace environmental considerations. Our investigations utilized an amplified Ti:sapphire laser system with pulses of 120 fs duration, up to 300 /spl mu/J in pulse energy, and operating at a 1 kHz repetition rate.
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 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) | 0.011 | 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 teacher head, 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".