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| Name | Description | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GDES | Operation Gradient setpoint (MV/m) | |||||||||||||||
| GACT | Measured gradient from cavity probe (MV/m) | |||||||||||||||
| GMAX | Maximum allowable gradient (MV/m) | |||||||||||||||
| GCAL | Gradient calibration scale factor, nominally 1. Multiply by this when calculating raw register value to set, so increasing GCAL increases output. | |||||||||||||||
| ADES | Operation Amplitude setpoint (MV) | |||||||||||||||
| AACT | Measured amplitude from cavity probe (MV) | |||||||||||||||
| AMAX | Maximum allowable amplitude (MV) | |||||||||||||||
| ACAL | Amplitude calibration scale factor, nominally 1. Multiply by this when calculating raw register value to set, so increasing GCAL increases output. | |||||||||||||||
| PDES | Operation Phase setpoint (degrees, where 0 is on-crest) | |||||||||||||||
| PACT | Measured phase from cavity probe (degrees) | |||||||||||||||
| PREF | a.k.a.gold, phase offset used by LLRF to convert measured phase to one relative to on-crest operation, adjusted by beam phasing (detrees) | |||||||||||||||
| FDES | Cavity detuning setpoint (Hz) | |||||||||||||||
| FACT | Detune seen by the resonance system (Hz) | |||||||||||||||
| Mode | RF mode (off, pulsed, SEL, GDR) | |||||||||||||||
| RFCTRL | Master enable for an RF cavity (On, Off) \[How to distinguish this from the SSA specific RF enable register?] | |||||||||||||||
| RFReady | Status of RF controls, (Ready, Not Ready) set to ready when control loops are closed and RF is continuous. Or will we ever run with pulsed RF? | |||||||||||||||
| Quench | Status showing when a cavity quenches, from interlocks (Normal, Quenched) | |||||||||||||||
| STAT | Status bits in software (define the bits) | |||||||||||||||
| HSTA | Hardware status | |||||||||||||||
| GTRACE | Gradient waveform from the cavity probe, which is used to calculate GACT (MV/m) | |||||||||||||||
| PTRACE | Phase waveform from the cavity probe, which is used to calculate PACT (degrees) | |||||||||||||||
| *ERRTRACE | Error waveforms corresponding to waveforms above, captured and put in a separate buffer when a fault is detected (degrees or MV/m) | |||||||||||||||
| Any of the above in I/Q equivalent of Amplitude/Phase | ||||||||||||||||
| PwrFwd | Forward power from SSA to cavity | |||||||||||||||
| PwrRev | Reflected/reverse power from cavity | |||||||||||||||
| PzWF | Waveforms from tuner piezo motors, useful for finding microphonics. Units TBD. | |||||||||||||||
| ALEM | LEM computed integrated RF amplitude (MV) per cavity and per cryomodule | |||||||||||||||
| PLEM | LEM computed phase (deg) | |||||||||||||||
| EGLEM | LEM computed energy gain (MeV) | |||||||||||||||
| CHLEM | LEM computed chirp (MeV) | |||||||||||||||
| Waveform Signals | ||||||||||||||||
The PVs below will be provided for each waveform signal. Each cavity has the following waveform signals:
| ||||||||||||||||
| Waveform | <SIG>:ATRACE | Signal amplitude waveform | ||||||||||||||
Statistics | <SIG>:AMEAN | Mean of <SIG>:ATRACE | ||||||||||||||
| <SIG>:ASTD | Standard deviation of <SIG>:ATRACE | |||||||||||||||
| <SIG>:AMIN | Minimum of <SIG>:ATRACE | |||||||||||||||
| <SIG>:AMAX | Maximum of <SIG>:ATRACE | |||||||||||||||
| Waveform | <SIG>:PTRACE | Signal phase waveform | ||||||||||||||
| Statistics | <SIG>:PMEAN | Mean of <SIG>:PTRACE | ||||||||||||||
| <SIG>:PSTD | Standard deviation of <SIG>:PTRACE | |||||||||||||||
| <SIG>:PMIN | Minimum of <SIG>:PTRACE | |||||||||||||||
| <SIG>:PMAX | Maximum of <SIG>:PTRACE | |||||||||||||||
| Waveform | <SIG>:PWRTRACE | Signal power waveform | ||||||||||||||
| Statistics | <SIG>:PWRMEAN | Mean of <SIG>:PWRTRACE | ||||||||||||||
| <SIG>:PWRSTD | Standard deviation of <SIG>:PWRTRACE | |||||||||||||||
| <SIG>:PWRMIN | Minimum of <SIG>:PWRTRACE | |||||||||||||||
| <SIG>:PWRMAX | Maximum of <SIG>:PWRTRACE | |||||||||||||||
| Waveform | <SIG>:ITRACE | Signal I waveform | ||||||||||||||
| Waveform | <SIG>:QTRACE | Signal Q waveform | ||||||||||||||
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