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| Name | Description | ||
|---|---|---|---|
| (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. | |||
| Q0 | Q0 measurement from partner labs, delivered with the cryomodule | ||
| Qext | Qext measured in-situ (last measurement – used to calibrate cavity probe signal based on discharge power) | ||
| LFD | Lorentz Force Detuning K factor(Hz/(MV/m)^2) measured in-situ | ||
| Calibration of the slow tuner (Hz/step) measured in-situ | |||
| Calibration of the piezo tuners (Hz/volt) measured in-situ | |||
| Cables and couplers loss, combined with sensor sensitivity, as a scale factor to multiply raw reading by to get MV/m | |||
| FWD:SCALE | Calibration scale factor to convert forward raw ADC counts to amplitude in sqrt(Watts). Calculated internally by RF software, based on system losses and ADC power at full scale. | ||
| REV:SCALE | Calibration scale factor to convert reverse raw ADC counts to amplitude in sqrt(Watts). Calculated internally by RF software, based on system losses and ADC power at full scale. | ||
| DRV:SCALE | Calibration scale factor to convert drive (aka loopback) raw ADC counts to amplitude in sqrt(Watts). Calculated internally by RF software, based on system losses and ADC power at full scale. | ||
| CAV:CAL_SCALE | Calibration scale factor to convert cavity probe raw ADC counts to amplitude in MV. Calculated by LLRF calibration sequence. See CAV:SCALE for more info. | ||
| CAV:SCALE | Calibration scale factor to convert cavity probe raw ADC counts to amplitude in MV. Is equal to product of CAV:CAL_SCALE and beam-based FUDG scale factor. | ||
| FWD:CAL_REF_PWR | RF power at ADC full scale for forward measurement. In dBm. Analogous PVs exist for reverse and drive (aka loopback) signals. | ||
| FWD:CAL_LOSS_CABLE | Measured cable losses for forward measurement used in signal calibration. Positive value in dB. Analogous PVs exist for reverse signal. | ||
| FWD:CAL_LOSS_CPLR | Measured coupler loss for forward measurement used in signal calibration. Positive value in dB. Analogous PVs exist for reverse signal | ||
| FWD:CAL_LOSS_ATTEN | Fixed attenuator for forward measurement used in signal calibration. Positive value in dB. Analogous PVs exist for reverse and drive (aka loopback) signals. | ||
| FWD:CAL_LOSS_OTHER | Unattributed measured loss for forward measurement used in signal calibration. Positive value in dB. Analogous PVs exist for reverse and drive (aka loopback) signals. | ||
| FWD:CAL_LOSS_TOTAL | Total loss for forward measurement used in signal calibration. Positive value in dB. Analogous PVs exist for reverse and drive (aka loopback) signals. | Attenuator value, combined with the above as a multiplier to convert raw to units. Probalby in dB | |
| Chassis and ADC scale factor, or polynomial coefficients. From lab measurements of chassis to convert ADC units to physics units | |||
| PI(no D) loop parameters for amplitude and phase loops. Maybe PKp, PKi, GKp, GKi | |||
| Open loop amplitude and phase DAC settings | |||
| Control loop status (open, closed) | |||
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