Printed, dual-loop magnetic field sniffer probe for bench measurements on radio frequency MRI coils
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
This work describes an open-source design for decoupled dual-loop radio frequency (RF) probes which are common tools in the RF lab. In magnetic resonance (MR) applications dual-loop probes are used to measure the tuning frequency and quality factor of RF coils and associated electronics. Traditional dual-loop probes, however, are delicate and not readily available commercially because they are made using semi-rigid or hand-formable coaxial cable, and they require skill and experience to build well. Our dual-loop probe design is tough, reliable, and can be mass-produced inexpensively, thus allowing new and established labs to obtain these probes with minimal effort. We used two overlapped shielded loops fabricated with multilayer printed circuit board technology. Design files are published under an open-hardware license. The printed probe achieves the required levels of durability and high isolation (better than 50 dB up to 500 MHz) which are equivalent to those achieved with traditional probes, and much more resistant to degradation.
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.
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