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| R/W | Name | Description | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| R | GACT | Measured gradient from cavity probe (MV/m) | |||||||||||||||
| R | GMAX | Maximum allowable gradient (MV/m) - readback only | |||||||||||||||
| R/W | ADES | Operation amplitude setpoint (MV) | |||||||||||||||
| R | AACT | Measured amplitude from cavity probe (MV) | |||||||||||||||
| R/W | AMAX | Maximum allowable amplitude (MV) | |||||||||||||||
| R/W | PDES | Operation phase setpoint (degrees, where 0 is on-crest) | |||||||||||||||
| R | PACT | Measured phase from cavity probe (degrees) | |||||||||||||||
| R/W | SEL_POFF | SEL phase offset setpoint (not used in SELA mode) | |||||||||||||||
| R/W | 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 (degrees) | |||||||||||||||
| ? | DFDES | Cavity detuning setpoint (Hz) - is this needed? | |||||||||||||||
| R | DFACT | Detune seen by the resonance system (Hz) | |||||||||||||||
| R/W | RFMODECTRL | RF mode control (SEL, SELA, SELAP) | |||||||||||||||
| R | RFMODE | Readback of current RF mode | |||||||||||||||
| R/W | RFCTRL | Cavity on/off control. Off = LLRF drive set to 0. (SSA control will be different.) | |||||||||||||||
| R | RFSTATE | Readback of cavity RF on/off state | |||||||||||||||
| R | AWF | Waveform of cavity probe amplitude, which is used to calculate AACT (MV) | |||||||||||||||
| R | PWF | Waveform of cavity probe phase, which is used to calculate PACT (degrees) | |||||||||||||||
| R | FWD | Forward signal from SSA to cavity - amplitude | |||||||||||||||
| R | FWDPWR | Forward signal from SSA to cavity - power | |||||||||||||||
| R | REV | Reverse signal from cavity - amplitude | |||||||||||||||
| R | REVPWR | Reverse signal from cavity - power | |||||||||||||||
| R/W | ALEM | LEM computed integrated RF amplitude (MV) per cavity and per cryomodule | |||||||||||||||
| R/W | PLEM | LEM computed phase (deg) | |||||||||||||||
| R/W | EGLEM | LEM computed energy gain (MeV) | |||||||||||||||
| R/W | CHLEM | LEM computed chirp (MeV) | |||||||||||||||
| R | FUDG | Beam-based scale factor applied to cavity probe amplitude readback. Nominal value of 1. | |||||||||||||||
| R | L | Cavity length | |||||||||||||||
| R | FREQ | Cavity frequency | |||||||||||||||
| R | IMPED | Shunt impedance | |||||||||||||||
| In Progress/Tentative | |||||||||||||||||
| 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? | ||||||||||||||||
STAT | Status bits in software (define the bits) | ||||||||||||||||
| HSTA | Hardware status | ||||||||||||||||
| DFDES | Cavity detuning setpoint (Hz) | ||||||||||||||||
| ERRWF | Error waveforms corresponding to waveforms above, captured and put in a separate buffer when a fault is detected (degrees or MV) | ||||||||||||||||
| PZWF | Waveforms from tuner piezo motors, useful for finding microphonics. Units TBD. | ||||||||||||||||
| Latching SRF Interlocks - In Progress/Tentative | |||||||||||||||||
| R | QUENCH_FLT |
Cavity quench fault, from interlock chassis. Current status, latched status, and reset command | |||||||||||||||
| R | QUENCH_LTCH | ||||||||||||||||
| W | QUENCH_RESET | ||||||||||||||||
| R | CPLRVAC_FLT |
Coupler vacuum fault, from interlock chassis. Current status, latched status, and reset command | |||||||||||||||
| R | CPLRVAC_LTCH | ||||||||||||||||
| W | CPLRVAC_RESET | ||||||||||||||||
| R | BMLNVAC_FLT |
Beamline vacuum fault, from interlock chassis. Current status, latched status, and reset command | |||||||||||||||
| R | BMLNVAC_LTCH | ||||||||||||||||
| W | BMLNVAC_RESET | ||||||||||||||||
| R | STEPTEMP_FLT |
Stepper temperature fault, from interlock chassis. Current status, latched status, and reset command | |||||||||||||||
| R | STEPTEMP_LTCH | ||||||||||||||||
| W | STEPTEMP_RESET | ||||||||||||||||
| R | CPLRTEMP_FLT |
Coupler temperature fault, from interlock chassis. Current status, latched status, and reset command | |||||||||||||||
| R | CPLRTEMP_LTCH | ||||||||||||||||
| W | CPLRTEMP_RESET | ||||||||||||||||
| W | INTLK_RESET_ALL | Reset all latched faults from interlock chassis | |||||||||||||||
| Non-Latching SRF Interlocks (These are per-cryomodule, not per-cavity) - In Progress/Tentative | |||||||||||||||||
| R | HEPRES_FLT | Helium pressure fault, from cryo system PLC | |||||||||||||||
| R | HELEVEL_FLT | Helium level fault, from cryo system PLC | |||||||||||||||
| R | RFHEARTBEAT_FLT | Cryo receives RF heartbeat, from cryo system PLC | |||||||||||||||
| R | CRYOHEARTBEAT_FLT | Cryo PLC heartbeat fault. Generated by RF software when cryo data stops updating or updates too slowly | |||||||||||||||
| Interlock Thresholds - In Progress/Tentative | |||||||||||||||||
| R/W | CPLRVAC_THRES_L | ||||||||||||||||
| R/W | CPLRVAC_THRES_H | ||||||||||||||||
| R/W | BMLNVAC_THRES_L | ||||||||||||||||
| R/W | BMLNVAC_THRES_H | ||||||||||||||||
| R/W | STEPTEMP_THRES_L | ||||||||||||||||
| R/W | STEPTEMP_THRES_H | ||||||||||||||||
| R/W | CPLRTEMP_THRES_L | ||||||||||||||||
| R/W | CPLRTEMP_THRES_H | ||||||||||||||||
| Cavity Ramp-Up and Calibration Output | |||||||||||||||||
| R | QLOADED | Loaded Q | |||||||||||||||
| R | CAV_CONST | Cavity calibration constant (later will be merged with CAV:CAL_SCALE) | |||||||||||||||
| R | LDCOEF | Lorentz detuning | |||||||||||||||
| R | BCOEFM | State space B coefficient magnitude | |||||||||||||||
| R | BCOEFP | State space B coefficient phase | |||||||||||||||
| R | SSA:SLOPE | SSA slope | |||||||||||||||
| R | SSA:PED | SSA pedestal | |||||||||||||||
| R | SSA:MINX | SSA min X | |||||||||||||||
| Waveform Signals | |||||||||||||||||
The PVs below will be provided for each waveform signal. Each cavity has the following waveform signals:
| |||||||||||||||||
| Waveform | R | <SIG>:AWF | Signal amplitude waveform | ||||||||||||||
Statistics | R | <SIG>:AMEAN | Mean of <SIG>:AF | ||||||||||||||
| R | <SIG>:ASTD | Standard deviation of <SIG>:AWF | |||||||||||||||
| R | <SIG>:AMIN | Minimum of <SIG>:AF | |||||||||||||||
| R | <SIG>:AMAX | Maximum of <SIG>:AWF | |||||||||||||||
| Waveform | R | <SIG>:PWF | Signal phase waveform | ||||||||||||||
| Statistics | R | <SIG>:PMEAN | Mean of <SIG>:PWF | ||||||||||||||
| R | <SIG>:PSTD | Standard deviation of <SIG>:PWF | |||||||||||||||
| R | <SIG>:PMIN | Minimum of <SIG>:PWF | |||||||||||||||
| R | <SIG>:PMAX | Maximum of <SIG>:PWF | |||||||||||||||
| Waveform | R | <SIG>:PWRWF | Signal power waveform | ||||||||||||||
| Statistics | R | <SIG>:PWRMEAN | Mean of <SIG>:PWRTRACE | ||||||||||||||
| R | <SIG>:PWRSTD | Standard deviation of <SIG>:PWRWF | |||||||||||||||
| R | <SIG>:PWRMIN | Minimum of <SIG>:PWRWF | |||||||||||||||
| R | <SIG>:PWRMAX | Maximum of <SIG>:PWRWF | |||||||||||||||
| Waveform | R | <SIG>:ITWF | Signal I waveform | ||||||||||||||
| Waveform | R | <SIG>:QTWF | Signal Q waveform | ||||||||||||||
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