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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. |
| GCON | (suggestion from Chris Adolfsen that Garth is unclear on) Nominal Gradient (MV/m) in the currently loaded configuration |
| 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) |
| PMAX? | Could be included, staying parallel to GMAX, but is this useful? |
| PCON | See GCON above |
| FDES | Cavity detuning setpoint (Hz) |
| FACT | Detune seen by the resonance system (Hz) |
| FCON | See GCON above |
| (from Chris Adolfsen. Garth wonders should this be a calibration attribute rather than physics interface?) Slow tuner start-up position prior to rf turn on - with the piezo voltages zeroed, the cavity would be tuned close to 1.3 GHz after the operating gradient is established - thus the initial detuning with rf off relative to 1.3 GHz is K*(operating gradient)^2 | |
| (from Chris Adolfsen. Garth wonders should this be a calibration attribute rather than physics interface?) Slow tuner park position - this is the position the tuner would be set if one wants to detune the cavity so it does not interact with the beam. | |
| RFON | Master enable for an RF cavity (On, Off) |
| 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? |
| GactWF | Amplitude waveform from the cavity probe, which is used to calculate GACT (MV/m) |
| PactWF | Phase waveform from the cavity probe, which is used to calculate PACT (degrees) |
| GfwdWF | Amplitude waveform from SSA output (MV/m) |
| PfwdWF | Phase waveform from SSA output (degrees) |
| GrevWF | Reverse/reflected SSA output amplitude waveform (MV/m) |
| PrevWF | Reverse/reflected SSA output phase waveform (degrees) |
| *ErrWF | Error waveforms corresponding to waveforms above, captured and put in a separate buffer when a fault is detected (degrees or MV/m) |
| PzWF | Waveforms from tuner piezo motors, useful for finding microphonics. Units TBD. |
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