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Comment: Bring SRF PV names (more) up to date. Many changes.

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The position of a superconducting cavity is 4 numbers where the first two indicate the cryomodule and the second two the cavity. For example, 0430 is cryomodule 4, cavity 3.

Each cryomodule has 8 cavities. Cavities 1-4 are instrumented in LLRF Rack A. Cavities 5-8 are instrumented in LLRF Rack B.

 

Cryo Module #

Description

01-35

CM01-CM35, 1.3GHz cavity

H1

3.9GHz Cryomodule 1, located in L1B and follows CM03

H2

3.9GHz Cryomodule 2, located in L1B and follows  H1

 

Numbering of cavities within a cryomodule:

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Attributes that comprise the physics interface. Scalar unless otherwise specified

 R

 

 

Cavity quench , reset command 

   

 

Coupler vacuum , reset command

 

Beamline vacuum , reset commandSTEPTEMP   Stepper temperature , reset commandSTEPTEMP_LTCH 

 

 

Coupler temperature 1 Interlock , reset command, bypass command, bypass status

 

 

Coupler temperature 1 fault, from Interlock , reset command       Cryo PLC heartbeat fault. Generated by RF  
 RR/WNameDescription

 SRF SRF Example

(CM 2 Cavity 1)

 GunGun/Buncher Example
 RR/WRFMODECTRLRF mode control (SEL, SELA, SELAP, SEL Raw, Pulse, Chirp) ACCL:L1B:0210:RFMODECTRL N/A
 RRRFMODEReadback of current RF mode (SEL, SELA, SELAP, SEL Raw, Pulse, Chirp) ACCL:L1B:0210:RFMODE 
 RR/WRFCTRLCavity on/off control. Off = LLRF drive set to 0. (SSA control will be different.) ACCL:L1B:0210:RFCTRL 
 RRRFSTATE Readback of cavity RF on/off state ACCL:L1B:0210:RFSTATE

 N/A

 RR/WADESOperation amplitude setpoint (MV) ACCL:L1B:0210:ADES 
 RRGDESGradient setpoint (MV/m) - readback only ACCL:L1B:0210:GDES N/A
 RRAACTMeasured amplitude from cavity probe (MV) ACCL:L1B:0210:AACT 
 RRGACTMeasured gradient from cavity probe (MV/m) ACCL:L1B:0210:GACT 
 RR/WAMAX

Maximum allowable amplitude (MV) - experts only

 ACCL:L1B:0210:AMAX 
 RRGMAX

Maximum allowable gradient (MV/m) - readback only

 ACCL:L1B:0210:GMAX 
 RR/WPDESOperation phase setpoint (degrees, where 0 is on-crest) ACCL:L1B:0210:PDES 
 RRPACTMeasured phase from cavity probe (degrees) ACCL:L1B:0210:PACT 
 RR/WPREFa.k.a.gold, phase offset used by LLRF to convert measured phase to one relative to on-crest operation, adjusted by beam phasing (degrees) ACCL:L1B:0210:PREF 
 RR/WSEL_POFFSEL phase offset setpoint (not used in SELA/GDR mode) ACCL:L1B:0210:SEL_POFF N/A
 RRSEL_POFF_RBVSEL phase offset (not used in SELA/GDR mode) ACCL:L1B:0210:SEL_POFF_RBV N/A
 RRDFACTMeasured etune frequency (Hz)N/A 
 RRDFMeasured detune frequency (Hz) using state space equation, cavity and forward signals - used to drive piezos ACCL:L1B:0210:DF N/A
 RRDF_FCMeasured detune frequency (Hz) using frequency counter method -  not used in resonance control, larger operating range than DF ACCL:L1B:0210:DF_FC N/A
 RRCHIRP:DFMeasured detune frequency (Hz) using chirp method -  only active in Chirp and Pulsed modes, primarily for use when cavity is many kHz out of tune, operating range of tens of kHz or more ACCL:L1B:0210:CHIRP:DF N/A
 RRAWFWaveform of cavity probe amplitude, which is used to calculate AACT (MV)  
 RRPWFWaveform of cavity probe phase, which is used to calculate PACT (degrees)  
 RRFWDForward signal from SSA to cavity - amplitude  
 RRFWDPWRForward signal from SSA to cavity - power  
 RRREVReverse signal from cavity - amplitude  
 RRREVPWRReverse signal from cavity - power  
 RR/WALEMLEM computed integrated RF amplitude (MV) per cavity and per cryomodule ACCL:L1B:0210:ALEM 
 RR/WPLEMLEM computed phase (deg) ACCL:L1B:0210:PLEM 
 RR/WEGLEMLEM computed energy gain (MeV) ACCL:L1B:0210:EGLEM 
 RR/WCHLEMLEM computed chirp (MeV) ACCL:L1B:0210:CHLEM 
 RR/W CAV:FUDG Beam-based scale factor applied to cavity probe amplitude readback. Nominal value of 1. ACCL:L1B:0210:CAV:FUDG 
 RRCavity design length - constant ACCL:L1B:0210:L N/A
 RR FREQCavity design frequency - constant ACCL:L1B:0210:FREQ N/A
 RR IMPEDCavity design shunt impedance - constant ACCL:L1B:0210:IMPED N/A
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  
Latching SRF Interlocks - Per Cavity
 WQUENCHINTLK_RESET_FLTALL Reset all latched faults from RFS and Resonance/Interlock chassisACCL:L1B:0210:INTLK_RESET_ALL 
RQUENCH_FLT

 

Cavity quench

fault, from RFS chassis. Current status, latched status

, bypass command, bypass status

 ACCL:L1B:0210:QUENCH_FLT 
 RRQUENCH_LTCH ACCL:L1B:0210:QUENCH_LTCH 
 R/WQUENCH_RESETBYPACCL:L1B:0210:QUENCH_BYP 
 R/WRQUENCH_BYP  _RBVACCL:L1B:0210: RQUENCH_BYP_RBV  
R RCPLRVACSTEPTEMP_FLT

    

Stepper temperature fault, from Interlock chassis. Current status, latched status

, bypass command, bypass status

 ACCL:L1B:0210:STEPTEMP_FLT 
 RRCPLRVACSTEPTEMP_LTCH ACCL:L1B:0210:STEPTEMP_LTCH 
 R/WCPLRVACSTEPTEMP_RESET  BYP ACCL:L1B:0210:STEPTEMP_BYP R/WCPLRVAC_BYP   
R RCPLRVACSTEPTEMP_BYP_RBV  ACCL:L1B:0210:STEPTEMP_BYP_RBV 
 RRBMLNVACCPLRTEMP1_FLT

 

Coupler temperature 1 fault, from Interlock chassis. Current status, latched status

, bypass command, bypass status

 ACCL:L1B:0210:CPLRTEMP1_FLT 
 RRBMLNVACCPLRTEMP1_LTCH   R/WBMLNVAC_RESET ACCL:L1B:0210:CPLRTEMP1_LTCH 
 R/WBMLNVACCPLRTEMP1_BYP  ACCL:L1B:0210:CPLRTEMP1_BYP 
 RRBMLNVACCPLRTEMP1_BYP_RBV  ACCL:L1B:0210:CPLRTEMP1_BYP_RBV  R
RCPLRTEMP2_FLT

 

Coupler temperature 2 fault, from Interlock chassis. Current status, latched status

, bypass command, bypass status

   R    ACCL:L1B:0210:CPLRTEMP2_FLT  
RCPLRTEMP2_LTCHACCL:L1B:0210:CPLRTEMP2_LTCH R/WSTEPTEMP_RESET 
 R/WSTEPTEMPCPLRTEMP2_BYP  BYPACCL:L1B:0210:CPLRTEMP2_BYP 
 RRSTEPTEMPCPLRTEMP2_BYP_RBV  RBVACCL:L1B:0210:CPLRTEMP2_BYP_RBV 
 RRCPLRTEMP1PLL_FLT

FPGA PLL lock fault, from

RFS chassis. Current status, latched status

. Cannot be bypassed.    

ACCL:L1B:0210:PLL_FLT  
R RPLL_LTCH ACCL:L1B:0210:PLLCPLRTEMP1_LTCH  
 R/WCPLRTEMP1_RESET  
 R/WCPLRTEMP1_BYP   
 RCPLRTEMP1_BYP_RBV   
RIOCWDOG_FLT

 

EPICS IOC watchdog fault, from RFS

 RCPLRTEMP2_FLT

chassis. Current status, latched status

, bypass command, bypass status

ACCL:L1B:0210:IOCWDOG_FLT 
 R CPLRTEMP2IOCWDOG_LTCH  R/WLTCH ACCL:L1B:0210:IOCWDOG_FLT CPLRTEMP2_RESET  R/W
IOCWDOG_BYP ACCL:L1B:0210:IOCWDOG CPLRTEMP2_BYP 
IOCWDOG_BYP_RBV ACCL:L1B:0210:IOCWDOG R CPLRTEMP2_BYP_RBVRBV   
R SSA_FLT

 

   

SSA permit fault, from RFS chassis. Current status, latched status, bypass command, bypass status

ACCL:L1B:0210:SSA_FLT   
 SSA_LTCH ACCL:L1B:0210:SSA_LTCH   
 SSA_BYP ACCL:L1B:0210:SSA_BYP      
SSA_BYP_RBV ACCL:L1B:0210:SSA_BYP_RBV 
SRF Interlocks - Per Rack (A or B)     
     
     
     
     
     
     
     
     
     
     
     
     
     
 WINTLK_RESET_ALL Reset all latched faults from RFS and Resonance/Interlock chassis  
     
Non-Latching SRF Interlocks (These are per-cryomodule, not per-cavity) - In Progress/Tentative
 RHEPRES_FLT Helium pressure fault, from cryo system PLC  
 RHELEVEL_FLT Helium level fault, from cryo system PLC  
 RRFHEARTBEAT_FLT Cryo receives RF heartbeat, from cryo system PLC  
 RCPLRVAC[A,B]_FLT

   

 

Coupler vacuum fault, from Interlock chassis. Current status, latched status, bypass command, bypass status

    
ACCL:L1B:0200:CPLRVACA_FLT 
 RCPLRVAC[A,B]_LTCHACCL:L1B:0200:CPLRVACA_LTCH 
 WCPLRVAC[A,B]_BYP ACCL:L1B:0200:CPLRVACA_BYP 
 RCPLRVAC[A,B]_BYP_RBV ACCL:L1B:0200:CPLRVACA_BYP_RBV 
 RBMLNVAC[A,B]_FLT

 

 

Beamline vacuum fault, from Interlock chassis. Current status, latched status, bypass command, bypass status

    
ACCL:L1B:0200:BMLNVACA_FLT 
 RBMLNVAC[A,B]_LTCHACCL:L1B:0200:BMLNVACA_LTCH 
 WBMLNVAC[A,B]_BYP ACCL:L1B:0200:BMLNVACA_BYP  
 RBMLNVAC[A,B]_BYP_RBV ACCL:L1B:0200:BMLNVACA_BYP_RBV 

 R

CRYOSUM[A,B]_FLT

 

 

Cryo summary fault, from local Cryo PLC. Current status, latched status, bypass command, bypass status

ACCL:L1B:0200:CRYOSUMA_FLT 
 RCRYOSUM[A,B]_LTCHACCL:L1B:0200:CRYOSUMA_LTCH 
 WCRYOSUM[A,B]_BYPACCL:L1B:0200:CRYOSUMA_BYP 
 RCRYOSUM[A,B]_BYP_RBVACCL:L1B:0200:CRYOSUMA_BYP_RBV 
   SRF Interlocks - Per Cryomodule - Tentative  
 RCRYOSUM_FLT Cryo summary status from local Cryo PLC. Current status ACCL:L1B:0200:CRYOSUM_FLT  
 RHELEVEL_FLT Cryo Helium level status from local Cryo PLC. Current status ACCL:L1B:0200:HELEVEL_FLT 
 RHEPRES_FLT Cryo Helium pressure status from local Cryo PLC. Current status ACCL:L1B:0200:HEPRES_FLT 
 RCRYOHEARTBEAT_FLT Cryo PLC heartbeat fault. Generated by RF  RCRYOHEARTBEAT_FLT software when cryo data stops updating or updates too slowly ACCL:L1B:0200:CRYOPLC_HEARTBEAT 
   Interlock Thresholds - In Progress/Tentative
    Cavity Ramp-Up and Calibration Output
RQLOADEDLoaded Q R/WCPLRVAC_THRES_L   
 R/WCAV_CONSTCavity calibration constant (later will be merged with CAV:CAL_SCALE)CPLRVAC_THRES_H   
 R/WBMLNVAC_THRES_L LDCOEF Lorentz detuning   
 R/WBMLNVAC_THRES_H BCOEFM State space B coefficient magnitude   
 R/WSTEPTEMP_THRES_L BCOEFP State space B coefficient phase   
 R/WSTEPTEMP_THRES_H SSA:SLOPE SSA slope   
 R/WCPLRTEMP_THRES_L SSA:PED SSA pedestal   
 R/WCPLRTEMP_THRES_H SSA:MINX SSA min X   
    Cavity Ramp-Up and Calibration Output
RQLOADEDLoaded Q  
 RCAV_CONSTCavity 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:

Description PV name, <SIG> in following section
 Drive DRV
 Forward Power FWD
 Reverse/Reflected Power REV
 Cavity Probe CAV
 Detune DF
 DAC (FPGA internal, input to DAC that drives SSA) DAC
 <SIG>:AWF Signal amplitude waveform  
     
  Waveform Signals

Each SRF cavity has the following waveform signals:

Description PV name, <SIG> in following sectionAmplitude Units Power Units Phase 
 Drive (RFS chassis loopback) DRVsqrt(W) Wdegrees
 Forward Power FWDsqrt(W) Wdegrees 
 Reverse/Reflected Power REVsqrt(W)  Wdegrees 
 Cavity Probe CAVMV mWdegrees 
 DAC (FPGA internal, input to DAC that drives SSA) DAC% of full DAC scale (% of full DAC scale)^2degrees 
 Detune (see below) DFHz  N/A N/A

For SRF systems, these PVs are provided for CAV, FWD, REV, DAC (and DRV only during expert diagnostics/troubleshooting.) Example PVs are for CAV.

 <SIG>:AWF Signal amplitude waveformACCL:L1B:0210:CAV:AWF 
R <SIG>:AMEAN Mean of <SIG>:AWFACCL:L1B:0210:CAV:AMEAN 
R <SIG>:ASTD Standard deviation of <SIG>:AWFACCL:L1B:0210:CAV:ASTD R <SIG>:AMEAN Mean of <SIG>:AF  
R <SIG>:ASTDARSTD Standard deviation of <SIG>:AWF divided by mean of <SIG>:AWF  
R <SIG>:AMIN Minimum of <SIG>:AF  
R <SIG>:AMAX Maximum of <SIG>:AWF  
 R <SIG>:PWF Signal phase waveform  
 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  
 R <SIG>:PWRWF Signal power waveform  
 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  
 R <SIG>:ITWF Signal I waveform  
ACCL:L1B:0210:CAV:ARSTD  
R <SIG>:AMIN Minimum of <SIG>:AWFACCL:L1B:0210:CAV:AMIN 
R <SIG>:AMAX Maximum of <SIG>:AWFACCL:L1B:0210:CAV:AWF  
 R <SIG>:PWF Signal phase waveformACCL:L1B:0210:CAV:PWF 
 R <SIG>:PMEAN Mean of <SIG>:PWFACCL:L1B:0210:CAV:PMEAN  
R <SIG>:PSTD Standard deviation of <SIG>:PWFACCL:L1B:0210:CAV:PSTD  
 <SIG>:PRSTD Standard deviation of <SIG>:PWF divided by mean of <SIG>:PWFACCL:L1B:0210:CAV:PRSTD   
R <SIG>:PMIN Minimum of <SIG>:PWFACCL:L1B:0210:CAV:PMIN 
R <SIG>:PMAX Maximum of <SIG>:PWFACCL:L1B:0210:CAV:PMAX 
R <SIG>:PWRWF Signal power waveformACCL:L1B:0210:CAV:PWRWF 
R <SIG>:PWRMEAN Mean of <SIG>:PWRWFACCL:L1B:0210:CAV:PWRMEAN 
R <SIG>:PWRSTD Standard deviation of <SIG>:PWRWFACCL:L1B:0210:CAV:PWRSTD  
R <SIG>:PWRRSTD Standard deviation of <SIG>:PWRWF divided by mean of <SIG>:PWRWFACCL:L1B:0210:CAV:PWRRSTD 
R <SIG>:PWRMIN Minimum of <SIG>:PWRWFACCL:L1B:0210:CAV:PWRMIN 
R <SIG>:PWRMAX Maximum of <SIG>:PWRWFACCL:L1B:0210:CAV:PWRMAX 
 R <SIG>:IWF Signal I waveformACCL:L1B:0210:CAV:IWF 
 R <SIG>:QWF Signal Q waveformACCL:L1B:0210:CAV:QWF 
Other SRF Waveform Signals:     
RDF:WF Detune frequency waveform. Calculated by software from cavity and forward signals. [Hz]ACCL:L1B:0210:DF:WF 
RDF:MEANMean of DF:WFACCL:L1B:0210:DF:MEAN 
RDF:STD Standard deviation of DF:WFACCL:L1B:0210:DF:STD  
RDF:MINMinimum of DF:WFACCL:L1B:0210:DF:MIN  
DF:MAX Maximum of DF:WFACCL:L1B:0210:DF:MAX  
RBW:WF Cavity bandwidth waveform. Calculated by software from cavity and forward signals.  [Hz]ACCL:L1B:0210:BW:WF  
RCTRL:IWFP/I Controller Output I waveform. Calculated by software from cavity and DAC signals. [% of full scale, range -1 to 1]ACCL:L1B:0210:CTRL:IWF  
CTRL:QWF P/I Controller Output Q waveform. Calculated by software from cavity and DAC signals. [% of full scale, range -1 to 1] ACCL:L1B:0210:CTRL:QWF   
     
Feedback     
 AMPFB_GAIN_P_RBV Amplitude feedback proportional gain readback (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_P_RBV 
R/W AMPFB_GAIN_P Amplitude feedback proportional gain setting (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_P  
 AMPFB_GAIN_I_RBV Amplitude feedback integral gain readback (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_I_RBV 
R/W AMPFB_GAIN_I Amplitude feedback integral gain setting (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_I  
 PHAFB_GAIN_P_RBV Phase feedback proportional gain readback (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_P_RBV 
R/W PHAFB_GAIN_P Phase feedback proportional gain setting (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_P  
 PHAFB_GAIN_I_RBV Phase feedback integral gain readback (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_I_RBV 
R/W PHAFB_GAIN_I Phase feedback integral gain setting (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_I  
    R <SIG>:QTWF Signal Q waveform  

Deployment and calibration attributes

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NameDescription
 Firmware MD5
 

BMB7 board serial #

 Digitizer board serial #
 Chassis serial # and/or Depot number