Design and testing of the ISAC RFQ control system
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
A Digital Signal Processor-based control system has been designed and tested for use with the ISAC RFQ accelerator. This system uses a direct digital synthesizer and phase-locked loop to generate the 35 MHz nominal cavity frequency. One DSP provides both in-phase and quadrature control for the system. A second DSP operates the cavity tuning mechanism. A reference signal with digital controlled phase shift is output for use in the upstream cavity in the beam path, an 11.66 MHz prebuncher. The system incorporates spark and high Voltage Standing Wave Ratio detection and protection. It also includes operator-controlled hardware limiting, and visual feedback of operating conditions. The complete system including low-level RF components is housed in a VXI rack. Turn-key operation is achieved via a supervisory control, which consists of a Windows-based server. This server broadcasts system status using User Datagrams, and listens on control commands via TCP. Network-aware database objects interpret these messages to provide control and display of the system operating parameters.
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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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