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Attributes that comprise the physics interface. Scalar unless otherwise specified

R/W	Name	Description	SRF Example (CM 2 Cavity 1)	Gun/Buncher Example
R/W	RFMODECTRL	RF mode control (SEL, SELA, SELAP, SEL Raw, Pulse, Chirp)	ACCL:L1B:0210:RFMODECTRL	N/A
R	RFMODE	Readback of current RF mode (SEL, SELA, SELAP, SEL Raw, Pulse, Chirp, Tone)	ACCL:L1B:0210:RFMODE
R/W	RFCTRL	Cavity on/off control. Off = LLRF drive set to 0. (SSA control will be different.)	ACCL:L1B:0210:RFCTRL
R	RFSTATE	Readback of cavity RF on/off state	ACCL:L1B:0210:RFSTATE	N/A
R	RFREADYFORBEAM

Cavity is on and in SELAP

Indicates cavity is in an okay state for beam operation. Possible states:

Ready (numerical 1) = cavity RF is On and mode is SELAP

Not ready (numerical 0) = Ready criteria not met

ACCL:L1B:0210:RFREADYFORBEAM

R/W

ADES

Operation amplitude setpoint (MV)

(For SRF, this setting is used in SEL, SELA, SELAP modes.)

ACCL:L1B:0210:ADES

R/W

GDES

ACON

Gradient setpoint

Configuration amplitude (MV

/m

)

- readback only

ACCL:L1B:0210:

GDES

ACON

N/A

W

RSEL_ASETSRF amplitude setpoint in SEL Raw, Pulse,

ACONTODES	Push configuration amplitude value to ADES. To do this, write 1 to ACONTODES	ACCL:L1B:0210:ACONTODES
R	GDES	Gradient setpoint (MV/m) - readback only	ACCL:L1B:0210:GDES	N/A
R	SEL_ASET	SRF amplitude setpoint in SEL Raw, Pulse, Chirp modes. Is in units of % of full drive scale.	ACCL:L1B:0210:

AACT

SEL_ASET	N/A
R

GACT

AACTMEAN

Measured

gradient

amplitude from cavity probe (MV

/m)

), averaged over LLRF waveform. Identical to CAV:AMEAN. Typically averaged over ~350 ms, but this can vary depending on waveform settings.	ACCL:L1B:0210:AACTMEAN
R	GACTMEAN

ACCL:L1B:0210:GACTR/WGACT

Measured gradient from cavity probe (MV/m), averaged over LLRF waveform. Typically averaged over ~350 ms, but this can vary depending on waveform settings.

ACCL:L1B:0210:

GACT

GACTMEAN
R

/W

AMAX

ADES_MAX

Maximum allowable amplitude (MV

) - experts only

). Minimum of SRF, RF, and Ops limits (below).

ACCL:L1B:0210:

AMAX

ADES_MAX
R

GMAXMaximum allowable gradient (MV/m) - readback only

/W

ADES_MAX_SRF

SRF maximum allowable amplitude, set by SRF experts (MV)

ACCL:L1B:0210:

GMAX

ADES_MAX_SRF
R/W

PDESOperation phase setpoint (degrees, where 0 is on-crest

ADES_MAX_RF

RF maximum allowable amplitude, set by RF experts (MV)

ACCL:L1B:0210:

PDES

ADES_MAX_RF
R

PACTMeasured phase from cavity probe (degrees

/W

ADES_MAX_OPS

Ops maximum allowable amplitude, set by Operations experts (MV)

ACCL:L1B:0210:

PACT

ADES_MAX_OPS
R

/W

PREFa.k.a.gold, phase offset used by LLRF to convert measured phase to one relative to on-crest operation, adjusted by beam phasing (degrees)

PACTMEAN

Measured phase from cavity probe (degrees), averaged over LLRF waveform. Identical to CAV:PMEAN. Typically averaged over ~350 ms, but this can vary depending on waveform settings.

ACCL:L1B:0210:

PREF

PACTMEAN
R/W

SEL_POFF

PDES

SEL

Operation phase

offset setpoint (not used in SELA/GDR mode)

setpoint (degrees, where 0 is on-crest by convention). Range -180 to 180.

ACCL:L1B:0210:

SEL_POFF

PDES

N

R/

A

W

RSEL_POFF_RBVSEL phase offset (not used in SELA/GDR mode

PCON

Configuration phase (degrees)

ACCL:L1B:0210:

SEL_POFF_RBV N/ARDFACTMeasured etune frequency (Hz)N/ARDF

ACON

W

PCONTODES

Push configuration phase value to PDES. To do this, write 1 to PCONTODES

ACCL:L1B:0210:PCONTODES

R/W

CKP

Cavity needs to be phased with respect to beam. Phasing program should set this to 0 when phasing is complete. It is set to 1 automatically when someone accepts a new Phase Reference Line offset.

Okay (numerical 0)

Check phase (numerical 1) - cavity needs to be phased

Measured detune frequency (Hz) using state space equation, cavity and forward signals - used to drive piezos

ACCL:L1B:0210:

DF

CKP

N/A

R

DFVALIDMeasured detune frequency (Hz) using state space equation, cavity and forward signals is valid. If it is not valid, its value cannot be used and the resonance system will not automatically change the piezo setting. In order for it to be valid, there must be sufficient cavity signal and it must be within +/- a couple hundred Hz. ACCL:L1B:0210:DFVALID N/A

CKPSUM	Alarm status for: cavity needs to be phased with respect to beam. Takes into account whether cavity is parked. Okay (numerical 0) Check phase (numerical 2)	ACCL:L1B:0210:CKPSUM
W	GOLD_PDES	'Golds' PDES. It will cause PREF to be updated and leave PDES at zero. How to use: Find maximum energy by adjusting PDES Set GOLD_PDES to 1 Doing so will cause: a. PREF to be set to (PREF-PDES) b. PDES will then be set to 0	ACCL:L1B:0210:GOLD_PDES
R/W	PREF	Do not set PREF directly. Instead, use GOLD_PDES above. Phase offset (degrees) used by LLRF to convert measured phase to one relative to on-crest operation, adjusted by (gold) beam phasing. Recommend not setting PREF directly, but using GOLD_PDES (above). PREF is subtracted from PDES before writing phase to hardware. PREF is added to the raw phase readback from hardware.	ACCL:L1B:0210:PREF
R/W	PTOF	Phase offset (degrees) used to adjust for changes in beam time-of-arrival, in particular for changes in bunch compressor path length. Unlike PREF, changing PTOF will immediately change the cavity phase. PTOF is subtracted from PDES before writing phase to hardware. PTOF is added to the raw phase readback from hardware.	ACCL:L1B:0210:PTOF
R/W	SEL_POFF	SEL phase offset setpoint	ACCL:L1B:0210:SEL_POFF	N/A
R	SEL_POFF_RBV	SEL phase offset readback	ACCL:L1B:0210:SEL_POFF_RBV	N/A
R	DFACT	Measured detune frequency (Hz)	N/A
R	DF	Measured detune frequency (Hz) using state space equation, cavity and forward signals - used to drive piezos	ACCL:L1B:0210:DF	N/A
R	DFVALID	Measured detune frequency (Hz) using state space equation, cavity and forward signals is valid. If it is not valid, its value cannot be used and the resonance system will not automatically change the piezo setting. In order for it to be valid, there must be sufficient cavity signal and it must be within +/- a couple hundred Hz.	ACCL:L1B:0210:DFVALID	N/A
R	DF_FC	Measured detune frequency (Hz) using frequency counter method - not used in resonance control, larger operating range than DF	ACCL:L1B:0210:DF_FC	N/A
R	CHIRP:DF	Measured 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
R/W	ALEM	LEM computed integrated RF amplitude (MV) per cavity and per cryomodule	ACCL:L1B:0210:ALEM
R/W	PLEM	LEM computed phase (deg)	ACCL:L1B:0210:PLEM
R/W	EGLEM	LEM computed energy gain (MeV)	ACCL:L1B:0210:EGLEM
R/W	CHLEM	LEM computed chirp (MeV)	ACCL:L1B:0210:CHLEM
R/W	CAV:FUDGE	Beam-based scale factor applied to cavity probe amplitude readback. Nominal value of 1. CAV:SCALE = cavity_preliminary_scaling * CAV:FUDGE CAV:SCALE is applied at the waveform level and so FUDGE is included in scalars like AACT, CAV:AMEAN, CAV:AMIN, CAV:AMAX, etc. and waveforms like CAV:IWF, CAV:QWF, CAV:AWF, etc. Example: Cavity ADES and AACTMEAN are 10 MV, but measured energy gain is 11 MV. Set CAV:FUDGE to 1.1. This will cause the RF drive level to be adjusted by 1/1.1 new_drive = original_drive / 1.1 and the cavity amplitude readback to be adjusted by 1.1.	ACCL:L1B:0210:CAV:FUDGE
R	L	Cavity design length - constant	ACCL:L1B:0210:L	N/A
R	FREQ	Cavity design frequency - constant	ACCL:L1B:0210:FREQ	N/A
R	IMPED	Cavity design shunt impedance - constant	ACCL:L1B:0210:IMPED	N/A
R	PWRDISS	Cavity dissipated power (W). Calculated by LLRF from Q0 and cavity amplitude. Sent by LLRF to cryo controls.	ACCL:L1B:0210:PWRDISS
R	Q0	Cavity Q0 (unitless), including user fudge factor. This is the value used by HaLO, LLRF calculation of dissipated power, etc. Formula: Q0 = Q0:MEAS * Q0:FUDGE	ACCL:L1B:0210:Q0
R/W	Q0:MEAS	Last measured cavity Q0 (unitless)	ACCL:L1B:0210:Q0:MEAS
R/W	Q0:FUDGE	Cavity Q0 fudge factor (unitless). Nominal value of 1. Can be used to adjust Q0 if suspect actual Q0 is not Q0:MEAS, for example due to recent quench.	ACCL:L1B:0210:Q0:FUDGE
SRF Interlocks - Per Cavity
W	INTLK_RESET_ALL	Reset all latched faults from RFS and Resonance/Interlock chassis	ACCL:L1B:0210:INTLK_RESET_ALL
R	RFS:INTLK_FIRST	Bit mask indicating which interlock fault was first detected by RFS.	ACCL:L1B:0210:RFS:INTLK_FIRST	N/A
R	RFS:FLTINTLK_FIRST	For last captured fault waveform, bit mask indicating which interlock fault was first detected by RFS	ACCL:L1B:0210:RFS:FLTINTLK_FIRST	N/A
R	QUENCH_FLT	Cavity quench fault, from RFS chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.	ACCL:L1B:0210:QUENCH_FLT
R	QUENCH_LTCH		ACCL:L1B:0210:QUENCH_LTCH
W	QUENCH_BYP		ACCL:L1B:0210:QUENCH_BYP
R	QUENCH_BYP_RBV		ACCL:L1B:0210:QUENCH_BYP_RBV
R	QUENCH_CNTT		ACCL:L1B:0210:QUENCH_CNTT
R	QUENCH_CNTY		ACCL:L1B:0210:QUENCH_CNTY
R	QUENCH_CNT		ACCL:L1B:0210:QUENCH_CNT
R	QUENCH_CNTU		ACCL:L1B:0210:QUENCH_CNTU
R	STEPTEMP_FLT	Stepper temperature fault, from Interlock chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.	ACCL:L1B:0210:STEPTEMP_FLT
R	STEPTEMP_LTCH		ACCL:L1B:0210:STEPTEMP_LTCH
W	STEPTEMP_BYP		ACCL:L1B:0210:STEPTEMP_BYP
R	STEPTEMP_BYP_RBV		ACCL:L1B:0210:STEPTEMP_BYP_RBV
R	STEPTEMP_CNTT		ACCL:L1B:0210:STEPTEMP_CNTT
R	STEPTEMP_CNTY		ACCL:L1B:0210:STEPTEMP_CNTY
R	STEPTEMP_CNT		ACCL:L1B:0210:STEPTEMP_CNT
R	STEPTEMP_CNTU		ACCL:L1B:0210:STEPTEMP_CNTU
R	CPLRTEMP1_FLT	Coupler temperature 1 fault, from Interlock chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.	ACCL:L1B:0210:CPLRTEMP1_FLT
R	CPLRTEMP1_LTCH		ACCL:L1B:0210:CPLRTEMP1_LTCH
W	CPLRTEMP1_BYP		ACCL:L1B:0210:CPLRTEMP1_BYP
R	CPLRTEMP1_BYP_RBV		ACCL:L1B:0210:CPLRTEMP1_BYP_RBV
R	CPLRTEMP1_CNTT		ACCL:L1B:0210:CPLRTEMP1_CNTT
R	CPLRTEMP1_CNTY		ACCL:L1B:0210:CPLRTEMP1_CNTY
R	CPLRTEMP1_CNT		ACCL:L1B:0210:CPLRTEMP1_CNT
R	CPLRTEMP1_CNTU		ACCL:L1B:0210:CPLRTEMP1_CNTU
R	CPLRTEMP2_FLT	Coupler temperature 2 fault, from Interlock chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.	ACCL:L1B:0210:CPLRTEMP2_FLT
R	CPLRTEMP2_LTCH		ACCL:L1B:0210:CPLRTEMP2_LTCH
W	CPLRTEMP2_BYP		ACCL:L1B:0210:CPLRTEMP2_BYP
R	CPLRTEMP2_BYP_RBV		ACCL:L1B:0210:CPLRTEMP2_BYP_RBV
R	CPLRTEMP2_CNTT		ACCL:L1B:0210:CPLRTEMP2_CNTT
R	CPLRTEMP2_CNTY		ACCL:L1B:0210:CPLRTEMP2_CNTY
R	CPLRTEMP2_CNT		ACCL:L1B:0210:CPLRTEMP2_CNT
R	CPLRTEMP2_CNTU		ACCL:L1B:0210:CPLRTEMP2_CNTU
R	PLL_FLT	FPGA PLL lock fault, from RFS chassis. Current status, latched status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults. Cannot be bypassed.	ACCL:L1B:0210:PLL_FLT
R	PLL_LTCH		ACCL:L1B:0210:PLL_LTCH
R	PLL_CNTT		ACCL:L1B:0210:PLL_CNTT
R	PLL_CNTY		ACCL:L1B:0210:PLL_CNTY
R	PLL_CNT		ACCL:L1B:0210:PLL_CNT
R	PLL_CNTU		ACCL:L1B:0210:PLL_CNTU
R	IOCWDOG_FLT	EPICS IOC watchdog fault, from RFS chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.	ACCL:L1B:0210:IOCWDOG_FLT
R	IOCWDOG_LTCH		ACCL:L1B:0210:IOCWDOG_FLT
W	IOCWDOG_BYP		ACCL:L1B:0210:IOCWDOG_BYP
R	IOCWDOG_BYP_RBV		ACCL:L1B:0210:IOCWDOG_BYP_RBV
R	IOCWDOG_CNTT		ACCL:L1B:0210:IOCWDOG_CNTT
R	IOCWDOG_CNTY		ACCL:L1B:0210:IOCWDOG_CNTY
R	IOCWDOG_CNT		ACCL:L1B:0210:IOCWDOG_CNT
R	IOCWDOG_CNTU		ACCL:L1B:0210:IOCWDOG_CNTT
R	SSA_FLT	SSA permit fault, from RFS chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.	ACCL:L1B:0210:SSA_FLT
R	SSA_LTCH		ACCL:L1B:0210:SSA_LTCH
W	SSA_BYP		ACCL:L1B:0210:SSA_BYP
R	SSA_BYP_RBV		ACCL:L1B:0210:SSA_BYP_RBV
R	SSA_CNTT		ACCL:L1B:0210:SSA_CNTT
R	SSA_CNTY		ACCL:L1B:0210:SSA_CNTY
R	SSA_CNT		ACCL:L1B:0210:SSA_CNT
R	SSA_CNTU		ACCL:L1B:0210:SSA_CNTU
SRF Interlocks - Per Rack (A or B)
R	CPLRVAC[A,B]_FLT	Coupler vacuum fault, from Interlock chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.	ACCL:L1B:0200:CPLRVACA_FLT
R	CPLRVAC[A,B]_LTCH		ACCL:L1B:0200:CPLRVACA_LTCH
W	CPLRVAC[A,B]_BYP		ACCL:L1B:0200:CPLRVACA_BYP
R	CPLRVAC[A,B]_BYP_RBV		ACCL:L1B:0200:CPLRVACA_BYP_RBV
R	CPLRVAC[A,B]_CNTT		ACCL:L1B:0200:CPLRVACA_CNTT
R	CPLRVAC[A,B]_CNTY		ACCL:L1B:0200:CPLRVACA_CNTY
R	CPLRVAC[A,B]_CNT		ACCL:L1B:0200:CPLRVACA_CNT
R	CPLRVAC[A,B]_CNTU		ACCL:L1B:0200:CPLRVACA_CNTU
R	BMLNVAC[A,B]_FLT	Beamline vacuum fault, from Interlock

RDF_FCMeasured detune frequency (Hz) using frequency counter method - not used in resonance control, larger operating range than DF ACCL:L1B:0210:DF_FC N/ARCHIRP: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/AR/WALEMLEM computed integrated RF amplitude (MV) per cavity and per cryomodule ACCL:L1B:0210:ALEMR/WPLEMLEM computed phase (deg) ACCL:L1B:0210:PLEMR/WEGLEMLEM computed energy gain (MeV) ACCL:L1B:0210:EGLEMR/WCHLEMLEM computed chirp (MeV) ACCL:L1B:0210:CHLEMR/WCAV:FUDGBeam-based scale factor applied to cavity probe amplitude readback. Nominal value of 1. ACCL:L1B:0210:CAV:FUDGRL Cavity design length - constant ACCL:L1B:0210:L N/ARFREQCavity design frequency - constant ACCL:L1B:0210:FREQ N/ARIMPEDCavity design shunt impedance - constant ACCL:L1B:0210:IMPED N/ATentative

STAT

Status bits in software (define the bits) HSTA Hardware statusSRF Interlocks - Per Cavity WINTLK_RESET_ALL Reset all latched faults from RFS and Resonance/Interlock chassisACCL:L1B:0210:INTLK_RESET_ALL RRFS:INTLK_FIRST Bit mask indicating which interlock fault was first detected by RFS.ACCL:L1B:0210:RFS:INTLK_FIRST N/A RRFS:FLTINTLK_FIRST For last captured fault waveform, bit mask indicating which interlock fault was first detected by RFSACCL:L1B:0210:RFS:FLTINTLK_FIRST N/ARQUENCH_FLTCavity quench fault, from RFS

chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.

ACCL:L1B:

0210

0200:

QUENCH

BMLNVACA_FLT
R

QUENCH

BMLNVAC[A,B]_LTCH

ACCL:L1B:

0210

0200:

QUENCH

BMLNVACA_LTCH
W

QUENCH_BYP

BMLNVAC[A,B]_BYP

ACCL:L1B:

0210

0200:

QUENCH

BMLNVACA_

BYP

BYP
R

QUENCH

BMLNVAC[A,B]_BYP_

RBV

ACCL:L1B:

0210

0200:

QUENCH

BMLNVACA_BYP_RBV
R

STEPTEMP_FLT

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

BMLNVAC[A,B]_CNTT

ACCL:L1B:

0210

0200:

STEPTEMP

BMLNVACA_

FLT

CNTT
R

STEPTEMP_LTCH

BMLNVAC[A,B]_CNTY

ACCL:L1B:

0210

0200:

STEPTEMP

BMLNVACA_

LTCH

CNTY

WSTEPTEMP_BYP


R	BMLNVAC[A,B]_CNT	ACCL:L1B:

0210

0200:

STEPTEMP

BMLNVACA_

BYP

CNT
R

STEPTEMP_BYP_RBV

BMLNVAC[A,B]_CNTU

ACCL:L1B:

0210

0200:

STEPTEMP

BMLNVACA_

BYP_RBV

CNTU
R

CPLRTEMP1

CRYOSUM[A,B]_FLT

Coupler temperature 1

Cryo summary fault, from

Interlock chassis

local Cryo PLC. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.

ACCL:L1B:

0210

0200:

CPLRTEMP1

CRYOSUMA_FLT
R

CPLRTEMP1

CRYOSUM[A,B]_LTCH

ACCL:L1B:

0210

0200:

CPLRTEMP1

CRYOSUMA_LTCH
W

CPLRTEMP1_BYP

CRYOSUM[A,B]_BYP

ACCL:L1B:

0210

0200:

CPLRTEMP1

CRYOSUMA_BYP
R

CPLRTEMP1

CRYOSUM[A,B]_BYP_

RBV

ACCL:L1B:

0210

0200:

CPLRTEMP1

CRYOSUMA_BYP_RBV
R

CPLRTEMP2_FLT

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

	CRYOSUM[A,B]_CNTT	ACCL:L1B:0200:CRYOSUMA_CNTT
R	CRYOSUM[A,B]_CNTY	ACCL:L1B:

0210

0200:

CPLRTEMP2

CRYOSUMA_

FLT

CNTY
R

CPLRTEMP2_LTCH

CRYOSUM[A,B]_CNT

ACCL:L1B:

0210

0200:

CPLRTEMP2

CRYOSUMA_

LTCH

CNT

WCPLRTEMP2_BYP


R	CRYOSUM[A,B]_CNTU	ACCL:L1B:

0210

0200:

CPLRTEMP2_BYPRCPLRTEMP2_BYP_RBVACCL:L1B:0210:CPLRTEMP2_BYP_RBVRPLL_FLT

FPGA PLL lock fault, from RFS chassis. Current status, latched status. Cannot be bypassed.

ACCL:L1B:0210:PLL_FLTRPLL_LTCH ACCL:L1B:0210:PLL_LTCHRIOCWDOG_FLT

EPICS IOC watchdog fault, from RFS chassis. Current status, latched status, bypass command, bypass status

CRYOSUMA_CNTU
SRF Interlocks - Per Cryomodule - Tentative
R	CRYOSUM_FLT	Cryo summary status from local Cryo PLC. Current status	ACCL:L1B:0200:CRYOSUM_FLT
R	HELEVEL_FLT	Cryo Helium level status from local Cryo PLC. Current status	ACCL:L1B:0200:HELEVEL_FLT
R	HEPRES_FLT	Cryo Helium pressure status from local Cryo PLC. Current status	ACCL:L1B:0200:HEPRES_FLT
R	CRYOHEARTBEAT_FLT	Cryo PLC heartbeat fault. Generated by RF software when cryo data stops updating or updates too slowly	ACCL:L1B:0200:CRYOPLC_HEARTBEAT
SRF Cavity Characterization and Expert Settings
R	QLOADED	Loaded Q

ACCL:L1B:0210:IOCWDOG_FLTR IOCWDOG_LTCH

ACCL:L1B:0210:

IOCWDOG_FLTW IOCWDOG_BYP

QLOADED
R	LDCOEF	Lorentz detuning coefficient	ACCL:L1B:0210:

IOCWDOG_BYPR IOCWDOG_BYP_RBV

LDCOEF
R	BCOEFM	State space B coefficient magnitude	ACCL:L1B:0210:

IOCWDOG_BYP_RBV

BCOEFM
R

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

BCOEFP

State space B coefficient phase

ACCL:L1B:0210:

SSA_FLTR SSA_LTCH

BCOEFP
R	SSA:SLOPE	SSA curve parameter - slope	ACCL:L1B:0210:SSA

_LTCHW SSA_BYP

:SLOPE
R	SSA:PED	SSA curve parameter - pedestal	ACCL:L1B:0210:SSA

_BYPR SSA_BYP_RBV

:PED
R	SSA:MINX	SSA curve parameter - min x	ACCL

ACCL

:L1B:0210:SSA

_BYP_RBVSRF Interlocks - Per Rack (A or B) 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

:MINX

R

SSA:DRV_MAX

Maximum drive to SSA, range 0 to 1. Do not change this directly. It is set by SSA calibration script.

ACCL:L1B:0210:DRV_MAX

Waveform Signals

Each SRF cavity has the following waveform signals:

Description	PV name, <SIG> in following section	Amplitude Units	Power Units	Phase Units
Forward Power	FWD	sqrt(W)	W	degrees
Reverse/Reflected Power	REV	sqrt(W)	W	degrees
Cavity Probe	CAV	MV	mW	degrees
DAC (FPGA internal, input to DAC that drives SSA)	DAC	% of full DAC scale	(% of full DAC scale)^2	degrees
Detune (see below)	DF	Hz	N/A	N/A
Drive (RFS chassis loopback) - waveform disabled by default	DRV	sqrt(W)	W	degrees

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

R

<SIG>:AWF

Signal amplitude waveform

ACCL:L1B:0210:CAV:AWF

R

<SIG>:AMEAN

Mean of <SIG>:AWF

ACCL:L1B:0210:CAV:AMEAN

R

<SIG>:ASTD

Standard deviation of <SIG>:AWF

ACCL:L1B:0210:CAV:ASTD

R

<SIG>:ARSTD

Standard deviation of <SIG>:AWF divided by mean of <SIG>:AWF

ACCL:L1B:0210:CAV:ARSTD

R

<SIG>:AMIN

Minimum of <SIG>:AWF

ACCL:L1B:0210:CAV:AMIN

R

<SIG>:AMAX

Maximum of <SIG>:AWF

ACCL:L1B:0210:CAV:AWF

R

<SIG>:PWF

Signal phase waveform

ACCL:L1B:0210:CAV:PWF

R

<SIG>:PMEAN

Mean of <SIG>:PWF

ACCL:L1B:0210:CAV:PMEAN

R

<SIG>:PSTD

Standard deviation of <SIG>:PWF

ACCL:L1B:0210:CAV:PSTD

R

<SIG>:PRSTD

Standard deviation of <SIG>:PWF divided by mean of <SIG>:PWF

ACCL:L1B:0210:CAV:PRSTD

R

<SIG>:PMIN

Minimum of <SIG>:PWF

ACCL:L1B:0210:CAV:PMIN

R

<SIG>:PMAX

Maximum of <SIG>:PWF

ACCL:L1B:0210:CAV:PMAX

R

<SIG>:PWRWF

Signal power waveform

ACCL:L1B:0210:CAV:PWRWF

R

<SIG>:PWRMEAN

Mean of <SIG>:PWRWF

ACCL:L1B:0210:CAV:PWRMEAN

R

<SIG>:PWRSTD

Standard deviation of <SIG>:PWRWF

ACCL:L1B:0210:CAV:PWRSTD

R

<SIG>:PWRRSTD

Standard deviation of <SIG>:PWRWF divided by mean of <SIG>:PWRWF

ACCL:L1B:0210:CAV:PWRRSTD

R

<SIG>:PWRMIN

Minimum of <SIG>:PWRWF

ACCL:L1B:0210:CAV:PWRMIN

R

<SIG>:PWRMAX

Maximum of <SIG>:PWRWF

ACCL:L1B:0210:CAV:PWRMAX

R

<SIG>:IWF

Signal I waveform

ACCL:L1B:0210:CAV:IWF

R

<SIG>:QWF

Signal Q

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 software when cryo data stops updating or updates too slowly ACCL:L1B:0200:CRYOPLC_HEARTBEAT SRF Cavity Characterization and Expert SettingsRQLOADEDLoaded QACCL:L1B:0210:QLOADEDRLDCOEFLorentz detuning coefficientACCL:L1B:0210:LDCOEFRBCOEFMState space B coefficient magnitudeACCL:L1B:0210:BCOEFMRBCOEFPState space B coefficient phaseACCL:L1B:0210:BCOEFPRSSA:SLOPESSA curve parameter - slopeACCL:L1B:0210:SSA:SLOPERSSA:PEDSSA curve parameter - pedestalACCL:L1B:0210:SSA:PEDRSSA:MINXSSA curve parameter - min x ACCL:L1B:0210:SSA:MINXRSSA:MAXR Maximum drive to SSA, range 0 to 1. (Need better name.)ACCL:L1B:0210:QLOADED Waveform Signals

Each SRF cavity has the following waveform signals:

Description	PV name, <SIG> in following section	Amplitude Units	Power Units	Phase
Drive (RFS chassis loopback)	DRV	sqrt(W)	W	degrees
Forward Power	FWD	sqrt(W)	W	degrees
Reverse/Reflected Power	REV	sqrt(W)	W	degrees
Cavity Probe	CAV	MV	mW	degrees
DAC (FPGA internal, input to DAC that drives SSA)	DAC	% of full DAC scale	(% of full DAC scale)^2	degrees
Detune (see below)	DF	Hz	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.

R <SIG>:AWF Signal amplitude

waveform	ACCL:L1B:0210:CAV:AWF
R	<SIG>:

AMEAN Mean of <SIG>:AWF

FLTAWF

Fault waveform - signal amplitude

ACCL:L1B:0210:CAV:

AMEAN

FLTAWF
R	<SIG>:

ASTD Standard deviation of <SIG>:AWF

FLTPWF

Fault waveform - signal phase

ACCL:L1B:0210:CAV

:ASTD

:FLTPWF
Other SRF Waveform Signals:
R

<SIG>

DF:

ARSTD Standard deviation of <SIG>:AWF divided by mean of <SIG>:AWF

WF

Detune frequency waveform. Calculated by software from cavity and forward signals. [Hz]

ACCL:L1B:0210:

CAV

DF:

ARSTD

WF
R

<SIG>

DF:

AMIN

MEAN

Minimum of <SIG>

Mean of DF:

AWF

WF	ACCL:L1B:0210:

CAV

DF:

AMIN

MEAN
R

<SIG>

DF:

AMAX Maximum of <SIG>:AWF

STD

Standard deviation of DF:WF

ACCL:L1B:0210:

CAV

DF:

AWF

STD

R

<SIG>

DF:

PWF Signal phase waveform

MIN

Minimum of DF:WF

ACCL:L1B:0210:

CAV

DF:

PWF

MIN

R

<SIG>

DF:

PMEAN

MAX

Mean of <SIG>

Maximum of DF:

PWF

WF	ACCL:L1B:0210:

CAV

DF:

PMEAN

MAX
R

<SIG>

BW:

PSTD Standard deviation of <SIG>:PWF

WF

Cavity bandwidth waveform. Calculated by software from cavity and forward signals. [Hz]

ACCL:L1B:0210:

CAV

BW:

PSTD

WF

R

<SIG>

CTRL:

PRSTD Standard deviation of <SIG>:PWF divided by mean of <SIG>:PWF

IWF

P/I Controller Output I waveform. Calculated by software from cavity and DAC signals. [% of full scale, range -1 to 1]

ACCL:L1B:0210:

CAV

CTRL:

PRSTD

IWF

R

<SIG>:PMIN Minimum of <SIG>:PWF

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:

CAV

CTRL:

PMIN

QWF

R

<SIG>

CTRL:

PMAX Maximum of <SIG>:PWF

AWF

P/I Controller Output amplitude waveform. Calculated by software from cavity and DAC signals. [% of full scale, range -1 to 1]

ACCL:L1B:0210:

CAV

CTRL:

PMAX

AWF
R

<SIG>

CTRL:

PWRWF

FLTAWF

Signal power waveform

Fault waveform - P/I Controller Output amplitude

ACCL:L1B:0210:

CAV

CTRL:

PWRWF

FLTAWF
R

<SIG>

CTRL:

PWRMEAN Mean of <SIG>:PWRWF

FLTPWF

Fault waveform - P/I Controller Output phase

ACCL:L1B:0210:

CAV

CTRL:

PWRMEAN

FLTPWF
R

<SIG>:PWRSTD Standard deviation of <SIG>:PWRWF

/W

ACQ_FLT_DELAY

Fault data trigger control. In % of total waveform data duration. 0% = all data is pre-fault, 100% = all data is post-fault

ACCL:L1B:0210:

CAV:PWRSTD R <SIG>:PWRRSTD Standard deviation of <SIG>:PWRWF divided by mean of <SIG>:PWRWF

ACQ_FLT_DELAY

Feedback
R	AMPFB_GAIN_P_RBV	Amplitude feedback proportional gain readback (units not yet determined)	ACCL:L1B:0210:

CAV:PWRRSTD

AMPFB_GAIN_P_RBV
R

<SIG>:PWRMIN Minimum of <SIG>:PWRWF

/W

AMPFB_GAIN_P

Amplitude feedback proportional gain setting (units not yet determined)

ACCL:L1B:0210:

CAV:PWRMINR <SIG>:PWRMAX Maximum of <SIG>:PWRWF

AMPFB_GAIN_P
R	AMPFB_GAIN_I_RBV	Amplitude feedback integral gain readback (units not yet determined)	ACCL:L1B:0210:

CAV:PWRMAX

AMPFB_GAIN_I_RBV
R

<SIG>:IWF Signal I waveform

/W

AMPFB_GAIN_I

Amplitude feedback integral gain setting (units not yet determined)

ACCL:L1B:0210:

CAV:IWF

AMPFB_GAIN_I
R

<SIG>:QWF

PHAFB_GAIN_P_RBV

Phase feedback proportional gain readback (units not yet determined)

Signal Q waveform

ACCL:L1B:0210:

CAV:AWF

AMPFB_GAIN_P_RBV
R

<SIG>:FLTAWF Fault waveform - signal amplitude

/W

PHAFB_GAIN_P

Phase feedback proportional gain setting (units not yet determined)

ACCL:L1B:0210:

CAV:FLTAWFR <SIG>:FLTPWF Fault waveform - signal phase

AMPFB_GAIN_P
R	PHAFB_GAIN_I_RBV	Phase feedback integral gain readback (units not yet determined)	ACCL:L1B:0210:

CAV:FLTPWFOther SRF Waveform Signals: RDF:WF Detune frequency waveform. Calculated by software from cavity and forward signals. [Hz]

AMPFB_GAIN_I_RBV
R/W	PHAFB_GAIN_I	Phase feedback integral gain setting (units not yet determined)	ACCL:L1B:0210:

DF:WFRDF:MEANMean of DF:WF

AMPFB_GAIN_I
R	AMPFB_LSUM	Amplitude feedback is at lower limit while feedback is active. 0 if true (alarm state), 1 if false (good state)	ACCL:L1B:0210:

DF:MEANRDF:STD Standard deviation of DF:WF

AMPFB_LSUM
R	AMPFB_HSUM	Amplitude feedback is at upper limit while feedback is active. 0 if true (alarm state), 1 if false (good state)	ACCL:L1B:0210:

DF:STD RDF:MINMinimum of DF:WF

AMPFB_HSUM
R	AMPFB_SUM	Amplitude feedback is at either lower or upper limit while feedback is active. 0 if true (alarm state), 1 if false (good state)	ACCL:L1B:0210:

DF:MIN

AMPFB_SUM
R

DF:MAX Maximum of DF:WFACCL:L1B:0210:DF:MAX RBW:WF Cavity bandwidth waveform. Calculated by software from cavity and forward signals. [Hz]

PHAFB_LSUM

Phase feedback is at lower limit while feedback is active. 0 if true (alarm state), 1 if false (good state)

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]

PHAFB_LSUM
R	PHAFB_HSUM	Phase feedback is at upper limit while feedback is active. 0 if true (alarm state), 1 if false (good state)	ACCL:L1B:0210:

CTRL:IWF R CTRL:QWF P/I Controller Output Q waveform. Calculated by software from cavity and DAC signals. [% of full scale, range -1 to 1]

PHAFB_HSUM
R	PHAFB_SUM	Phase feedback is at either lower or upper limit while feedback is active. 0 if true (alarm state), 1 if false (good state)	ACCL:L1B:0210:

CTRL:QWF R CTRL:AWF P/I Controller Output amplitude waveform. Calculated by software from cavity and DAC signals. [% of full scale, range -1 to 1]

PHAFB_SUM
R	FB_SUM	Amplitude or phase feedback is at either lower or upper limit while RFREADYFORBEAM is active. 0 if true (alarm state), 1 if false (good state). This summary's counts of today's faults, yesterday's faults, total faults, a resettable counter faults.	ACCL:L1B:0210:

CTRL:AWF RCTRL:FLTAWF Fault waveform - P/I Controller Output amplitudeACCL:L1B:0210:CTRL:FLTAWFRCTRL:FLTPWF Fault waveform - P/I Controller Output phase

FB_SUM
R	FB_SUM_CNTT	ACCL:L1B:0210:

CTRL:FLTPWF

FB_SUM_CNTT
R

/W

ACQ

FB_

FLT_DELAYFault data trigger control. In % of total waveform data duration. 0% = all data is pre-fault, 100% = all data is post-fault

SUM_CNTY

ACCL:L1B:0210:

ACQ

FB_

FLT

SUM_

DELAY

CNTY

Feedback R AMPFB_GAIN_P_RBV Amplitude feedback proportional gain readback (units not yet determined)


R	FB_SUM_CNT	ACCL:L1B:0210:

AMPFB

FB_

GAIN

SUM_

P_RBV

CNT
R

/W

AMPFB

FB_

GAIN_P Amplitude feedback proportional gain setting (units not yet determined)

SUM_CNTU

ACCL:L1B:0210:

AMPFB

FB_SUM_CNTU

Resonance control

GAIN_P ACCL:AMPFB_GAIN_I_RBVACCLAMPFBGAINI R PHAFBGAINP_RBVACCLAMPFBGAINP_RBV/WACCLAMPFB_GAIN_P

	Name	DescriptionDescription	SRF Example (CM2 Cavity 1)SRF Example	Gun/Buncher Example
R/W	STEP:NSTEPS	Stepper tuner number of steps per move	ACCL	R	AMPFB_GAIN_I_RBV	Amplitude feedback integral gain readback (units not yet determined)	:L1B:0210:STEP:NSTEPS
W	STEP:MOV_REQ_NEG	Request stepper tuner move negative STEP:NSTEPS. Write 1 to request	ACCL	R/W	AMPFB_GAIN_I	Amplitude feedback integral gain setting (units not yet determined)	:L1B:0210:	STEP:MOV_	REQ_	NEG
W	STEP:MOV_	REQ_	Phase feedback proportional gain readback (units not yet determined)	POS	Request stepper tuner move positive STEP:NSTEPS. Write 1 to request	ACCL:L1B:0210:	STEP:MOV_	REQ_	POS
R		STEP:STATWRD	Stepper controller status word readback	ACCL	PHAFB_GAIN_P	Phase feedback proportional gain setting (units not yet determined)	:L1B:0210:	R	PHAFB_GAIN_I_RBV	Phase feedback integral gain readback (units not yet determined)	STEP:STATWRD
R	STEP:STATWRD.B0	Stepper controller status bit: motor moving; 1 = moving, 0 = not	ACCLACCL:L1B:0210:AMPFB_GAIN_I_RBVSTEP:STATWRD.B0
R/W	PHAFB_GAIN_I	Phase feedback integral gain setting (units not yet determined)		STEP:STATWRD.B2	Stepper controller status bit: motor done; 1 = done, 0 = not	ACCLACCL:L1B:0210:AMPFB_GAIN_I	R	AMPFB_HSUM	Amplitude feedback is at upper limit while feedback is active. 0 if true (alarm state), 1 if false (good state)	ACCL:L1B:0210:AMPFB_HSUM	R	AMPFB_HSUM	Amplitude feedback is at upper limit while feedback is active. 0 if true (alarm state), 1 if false (good state)	ACCL:L1B:0210:AMPFB_HSUM	R	PHAFB_LSUM	Phase feedback is at lower limit while feedback is active. 0 if true (alarm state), 1 if false (good state)	ACCL:L1B:0210:PHAFB_LSUM	R	PHAFB_HSUM	Phase feedback is at upper limit while feedback is active. 0 if true (alarm state), 1 if false (good state)	ACCL:L1B:0210:PHAFB_HSUM

Resonance control

Piezo enable/disable control; set to 1 to enable, 0 to disableENABLEPiezo mode status; 1 = Integrator, 0 = DC

:STEP:STATWRD.B2
R	STEP:STATWRD.B3	Stepper controller status bit: at limit B; 1 = at limit, 0 = not. (The limit should never be reached.)	ACCL:L1B:0210:STEP:STATWRD.B3
R	STEP:STATWRD.B4	Stepper controller status bit: at limit A; 1 = at limit, 0 = not. (The limit should never be reached.)	ACCL:L1B:0210:STEP:STATWRD.B4
R	STEP:CTRLWRD	Stepper controller status word readback	ACCL:L1B:0210:STEP:CTRLWRD
R	STEP:CTRLWRD.B5	Stepper controller status bit: move direction; 1 if negative, 0 if positive	ACCL:L1B:0210:STEP:STATWRD.B0
R	STEP:STATMSG	High-level status message from stepper controller software	ACCL:L1B:0210:STEP:STATMSG
W	PZT:ENABLE	Piezo enable/disable control; set to 1 to enable, 0 to disable	ACCL:L1B:0210:PZT:ENABLE
R	PZT:ENABLESTAT	Piezo enable/disable status; 1 = enabled, 0 = disabled	ACCL:L1B:0210:PZT:ENABLESTAT
W	PZT:MODECTRL	Piezo mode control; set to 1 for Integrator (feedback driven by RFS measured detune), 0 for DC control. Integrator is the correct mode for normal operations.	ACCL:L1B:0210:PZT:MODECTRL
R	PZT:MODESTAT	Piezo mode status; 1 = Integrator, 0 = DC	ACCL:L1B:0210:PZT:MODESTAT
R	PZT:V	Calculated piezo voltage	ACCL:L1B:0210:PZT:V
R	PZT:DF_RFS	Detune measurement sent from RFS to Resonance chassis. This drives the piezo while in Integrator mode.	ACCL:L1B:0210:PZT:DF_RFS
R	PZT:DFVALID_RFS	Detune measurement sent from RFS to Resonance chassis is valid. If it is not valid, the Integrator will not change the piezo setting	ACCL:L1B:0210:PZT:DFVALID_RFS
R/W	PZT:DAC_SP	DC voltage offset setting. Only used while in DC mode.	ACCL:L1B:0210:PZT:DAC_SP
R/W	PZT:INTEG_SP	Optional Integrator setpoint. Can be used to compensate for observed systematic detune offset while in Integrator mode.	ACCL:L1B:0210:PZT:INTEG_SP
R	PZT:INTEG_SP_RBV	Readback of optional Integrator setpoint.	ACCL:L1B:0210:PZT:INTEG_SP_RBV
R/W	PZT:BIAS	Piezo bias voltage setting. Nominally 25 V. Used to operate piezo away from range limits. This should not change during normal operations.	ACCL:L1B:0210:PZT:BIAS
R	PZT:BIAS_RBV	Readback of piezo bias voltage setting.	Name	DescriptionDescription	SRF Example (CM2 Cavity 1)SRF Example	Gun/Buncher Example	R/W	STEP:NSTEPS	Stepper tuner number of steps per move	ACCL:L1B:0210:STEP:NSTEPS	W	STEP:MOV_REQ_NEG	Request stepper tuner move negative STEP:NSTEPS. Write 1 to request	ACCL:L1B:0210:STEP:MOV_REQ_NEG	W	STEP:MOV_REQ_POS	Request stepper tuner move positive STEP:NSTEPS. Write 1 to request	ACCL:L1B:0210:STEP:MOV_REQ_POS	R	STEP:STATWRD	Stepper controller status word readback	ACCL:L1B:0210:STEP:STATWRD	R	STEP:STATWRD.B0	Stepper controller status bit: motor moving; 1 = moving, 0 = not	ACCL:L1B:0210:STEP:STATWRD.B0	R	STEP:STATWRD.B2	Stepper controller status bit: motor done; 1 = done, 0 = not	ACCL:L1B:0210:STEP:STATWRD.B2	R	STEP:STATWRD.B3	Stepper controller status bit: at limit B; 1 = at limit, 0 = not. (The limit should never be reached.)	ACCL:L1B:0210:STEP:STATWRD.B3	R	STEP:STATWRD.B4	Stepper controller status bit: at limit A; 1 = at limit, 0 = not. (The limit should never be reached.)	ACCL:L1B:0210:STEP:STATWRD.B4	R	STEP:CTRLWRD	Stepper controller status word readback	ACCL:L1B:0210:STEP:CTRLWRD	R	STEP:CTRLWRD.B5	Stepper controller status bit: move direction; 1 if negative, 0 if positive	ACCL:L1B:0210:STEP:STATWRD.B0	R	STEP:STATMSG	High-level status message from stepper controller software	ACCL:L1B:0210:STEP:STATMSG	W	PZT:ENABLE	ACCL:L1B:0210:PZT:	BIAS_RBV
RR	PZT:ENABLESTATINTEG_AT_LIM	Piezo integrator (feedback) is at a limit of its range. This may require moving the stepper to re-center the piezo. Piezo enable/disable status; 1 = enabled, 0 = disabled	ACCL:L1B:0210:PZT:ENABLESTAT	W	PZT:MODECTRL	Piezo mode control; set to 1 for Integrator (feedback driven by RFS measured detune), 0 for DC control. Integrator is the correct mode for normal operations.	ACCL:L1B:0210:PZT:MODECTRL	R	PZT:MODESTAT	INTEG_AT_LIM

Deployment and calibration attributes

By default, these should be write-protected during operation

PZT:MODESTATDetune measurement sent from RFS to Resonance chassis. This drives the piezo while in Integrator mode.PZT:DF_RFS /W DAC_SPDC voltage offset setting. Only used while in DC mode.PZTDAC_SP/WINTEGSP Optional Integrator setpoint. Can be used to compensate for observed systematic detune offset while in Integrator mode.PZTINTEG_SPReadback of optional Integrator setpoint.PZT:INTEG_SP_RBV/W

Piezo bias voltage setting. Nominally 25 V. Used to operate piezo away from range limits.

This should not change during normal operations.PZT:BIASPZTBIAS_RBVReadback of piezo bias voltage setting.PZT:BIAS_RBV

	Name	Description	SRF Example (CM 2 Cavity 1)	Gun/Buncher Example
R	AT:GMAX	During acceptance testing, maximum gradient. [MV/m]	ACCL:L1B:0210:	AT:GMAX	N/A
R	AT:AMAX	During acceptance testing, maximum amplitude. [MV]	R	PZT:V	Calculated piezo voltage	ACCL:L1B:0210:PZT:V	R	PZT:DF_RFS	AT:AMAX	N/A
R	AT:GUSE	During acceptance testing, usable gradient. [MV/m]	ACCL:L1B:0210:	AT:GUSE	N/A
R	AT:AUSE	During acceptance testing, usable amplitude. [MV]	R	PZT:DFVALID_RFS	Detune measurement sent from RFS to Resonance chassis is valid. If it is not valid, the Integrator will not change the piezo setting	ACCL:L1B:0210:PZT:DFVALID_RFS AT:AUSE	N/A
R	PZT	AT:	FEON_GACT	During acceptance testing, gradient at which field emission begins. [MV/m]	ACCL:L1B:0210:	AT:	FEON_GACT	N/A
R	PZT	AT:	FEON_	AACT	During acceptance testing, amplitude at which field emission begins. [MV]	ACCL:L1B:0210:	AT:	FEON_AACT	N/A
R	PZT:INTEG_SP_RBV	AT:LIMIT	During acceptance testing, cavity limiting factor. 0 = Undefined, 1 = Quench, 2 = FE, 3 = SSA trip, 4 = Admin, 5 = RF power, 6 = Other	ACCL:L1B:0210:	AT:LIMIT	N/A
R		PZT:BIAS	AT:Q0	During acceptance testing, cavity Q0 measured at 16 MV/m		ACCL:L1B:0210:	AT:Q0	N/A
R	AT:	QPROBE	During acceptance testing, cavity probe Q external, cold	ACCL:L1B:0210:	AT:QPROBE	N/A
R	PZTAT:INTEG_AT_LIMQHOM_CPLR	During acceptance testing, Higher Order Mode coupler Q external, coldPiezo integrator (feedback) is at a limit of its range. This may require moving the stepper to re-center the piezo.	ACCL:L1B:0210:PZTAT:INTEG_AT_LIM

Deployment and calibration attributes

By default, these should be write-protected during operation

Gun/Buncher Example Lorentz Force Detuning K factor(Hz/(MV/m)^2) measured in-situ

QHOM_CPLR	N/A
R	AT:QHOM_PICKUP	During acceptance testing, Higher Order Mode pickup Q external, cold	ACCL:L1B:0210:AT:QHOM_PICKUP	N/A	Name	Description	SRF Example (CM 2 Cavity 1)
		(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	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.
		Calibration of the slow tuner (Hz/step) measured in-situ
		Calibration of the piezo tuners (Hz/volt) measured in-situ
Per Cryomodule
R	SN	Cryomodule serial number	ACCL:L1B:0200:SN	N/A
Signal calibration. For SRF cavities, the PVs below are provided for CAV, FWD, REV, DRV signals. The SRF PV name examples below use CAV.
Measured values
R/W	<SIG>:CAL_ADC_10DBM	ADC counts at 10 dBm. EPICS software uses this to calculate RF power at full scale.	ACCL:L1B:0210:CAV:CAL_ADC_10DBM
R/W	<SIG>:CAL_LOSS_CABLE	Measured cable losses used in signal calibration. Positive value in dB.	ACCL:L1B:0210:CAV:CAL_LOSS_CABLE
R/W	<SIG>:CAL_LOSS_CPLR	Measured coupler loss used in signal calibration. Positive value in dB.	ACCL:L1B:0210:CAV:CAL_LOSS_CPLR
R/W	<SIG>:CAL_LOSS_ATTEN	Fixed attenuator used in signal calibration. Positive value in dB.	ACCL:L1B:0210:CAV:CAL_LOSS_ATTEN
R/W	<SIG>:CAL_LOSS_OTHER	Unattributed measured loss used in signal calibration. Positive value in dB.	ACCL:L1B:0210:CAV:CAL_LOSS_OTHER
EPICS-calculated values
R	<SIG>:CAL_REF_PWR	RF power at ADC full scale. [dBm]	ACCL:L1B:0210:CAV:CAL_REF_PWR
R	<SIG>:CAL_LOSS_TOTAL	Total (of cable, coupler, atten, other) loss used in signal calibration. Positive value in dB.	ACCL:L1B:0210:CAV:CAL_LOSS_TOTAL
R	<SIG>:SCALE	Final calibration scale factor to convert raw ADC counts to amplitude. This also include the beam-based fudge factor	ACCL:L1B:0210:CAV:SCALE
For SRF, the signal calibration for Cavity Probe (CAV) can be calculated 2 ways: (1) using the above system losses, power at ADC full scale, and cavity probe Q or (2) calculated from the reverse signal decay. Experts can choose which method they would like to use per cavity
R/W	CAVSCALE_SEL	Select between calibration methods: 0 = Qprobe, 1 = RevCal	ACCL:L1B:0210:CAVSCALE_SEL
R/W	QPROBE	Cavity probe Q. Used in Qprobe calibration method.	ACCL:L1B:0210:QPROBE

Other attributes for operations -

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Tentative

Name	Description
V	Chassis power supply voltage
T	Chassis board temperature
DC	SSA enable/disable internal DC power
	SSA RF enable, how to distinguish from global RF enable?
PzVout	Output voltage to the piezo tuning motor
PzHz	Expected tuning change from PzVout

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Key

Attributes that comprise the physics interface. Scalar unless otherwise specified

Resonance control

Resonance control

Deployment and calibration attributes

Deployment and calibration attributes

Other attributes for operations -

Tentative