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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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R/W | PLEM | LEM computed phase (deg) | ACCL:L1B:0210:PLEM |
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R/W | EGLEM | LEM computed energy gain (MeV) | ACCL:L1B:0210:EGLEM |
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R/W | CHLEM | LEM computed chirp (MeV) | ACCL:L1B:0210:CHLEM |
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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 |
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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 |
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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 |
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R/W | Q0:MEAS | Last measured cavity Q0 (unitless) | ACCL:L1B:0210:Q0:MEAS |
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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 |
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SRF Interlocks - Per Cavity |
W | INTLK_RESET_ALL | Reset all latched faults from RFS and Resonance/Interlock chassis | ACCL:L1B:0210:INTLK_RESET_ALL |
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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 |
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R | QUENCH_LTCH | ACCL:L1B:0210:QUENCH_LTCH |
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W | QUENCH_BYP | ACCL:L1B:0210:QUENCH_BYP |
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R | QUENCH_BYP_RBV | ACCL:L1B:0210:QUENCH_BYP_RBV |
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R | QUENCH_CNTT | ACCL:L1B:0210:QUENCH_CNTT |
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R | QUENCH_CNTY | ACCL:L1B:0210:QUENCH_CNTY |
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R | QUENCH_CNT | ACCL:L1B:0210:QUENCH_CNT |
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R | QUENCH_CNTU | ACCL:L1B:0210:QUENCH_CNTU |
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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 |
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R | STEPTEMP_LTCH | ACCL:L1B:0210:STEPTEMP_LTCH |
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W | STEPTEMP_BYP | ACCL:L1B:0210:STEPTEMP_BYP |
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R | STEPTEMP_BYP_RBV | ACCL:L1B:0210:STEPTEMP_BYP_RBV |
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R | STEPTEMP_CNTT | ACCL:L1B:0210:STEPTEMP_CNTT |
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R | STEPTEMP_CNTY | ACCL:L1B:0210:STEPTEMP_CNTY |
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R | STEPTEMP_CNT | ACCL:L1B:0210:STEPTEMP_CNT |
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R | STEPTEMP_CNTU | ACCL:L1B:0210:STEPTEMP_CNTU |
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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 |
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R | CPLRTEMP1_LTCH | ACCL:L1B:0210:CPLRTEMP1_LTCH |
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W | CPLRTEMP1_BYP | ACCL:L1B:0210:CPLRTEMP1_BYP |
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R | CPLRTEMP1_BYP_RBV | ACCL:L1B:0210:CPLRTEMP1_BYP_RBV |
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R | CPLRTEMP1_CNTT | ACCL:L1B:0210:CPLRTEMP1_CNTT |
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R | CPLRTEMP1_CNTY | ACCL:L1B:0210:CPLRTEMP1_CNTY |
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R | CPLRTEMP1_CNT | ACCL:L1B:0210:CPLRTEMP1_CNT |
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R | CPLRTEMP1_CNTU | ACCL:L1B:0210:CPLRTEMP1_CNTU |
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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 |
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R | CPLRTEMP2_LTCH | ACCL:L1B:0210:CPLRTEMP2_LTCH |
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W | CPLRTEMP2_BYP | ACCL:L1B:0210:CPLRTEMP2_BYP |
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R | CPLRTEMP2_BYP_RBV | ACCL:L1B:0210:CPLRTEMP2_BYP_RBV |
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R | CPLRTEMP2_CNTT | ACCL:L1B:0210:CPLRTEMP2_CNTT |
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R | CPLRTEMP2_CNTY | ACCL:L1B:0210:CPLRTEMP2_CNTY |
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R | CPLRTEMP2_CNT | ACCL:L1B:0210:CPLRTEMP2_CNT |
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R | CPLRTEMP2_CNTU | ACCL:L1B:0210:CPLRTEMP2_CNTU |
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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 |
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R | PLL_LTCH | ACCL:L1B:0210:PLL_LTCH |
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R | PLL_CNTT | ACCL:L1B:0210:PLL_CNTT |
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R | PLL_CNTY | ACCL:L1B:0210:PLL_CNTY |
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R | PLL_CNT | ACCL:L1B:0210:PLL_CNT |
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R | PLL_CNTU | ACCL:L1B:0210:PLL_CNTU |
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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 |
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R | IOCWDOG_LTCH | ACCL:L1B:0210:IOCWDOG_FLT |
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W | IOCWDOG_BYP | ACCL:L1B:0210:IOCWDOG_BYP |
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R | IOCWDOG_BYP_RBV | ACCL:L1B:0210:IOCWDOG_BYP_RBV |
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R | IOCWDOG_CNTT | ACCL:L1B:0210:IOCWDOG_CNTT |
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R | IOCWDOG_CNTY | ACCL:L1B:0210:IOCWDOG_CNTY |
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R | IOCWDOG_CNT | ACCL:L1B:0210:IOCWDOG_CNT |
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R | IOCWDOG_CNTU | ACCL:L1B:0210:IOCWDOG_CNTT |
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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 |
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R | SSA_LTCH | ACCL:L1B:0210:SSA_LTCH |
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W | SSA_BYP | ACCL:L1B:0210:SSA_BYP |
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R | SSA_BYP_RBV | ACCL:L1B:0210:SSA_BYP_RBV |
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R | SSA_CNTT | ACCL:L1B:0210:SSA_CNTT |
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R | SSA_CNTY | ACCL:L1B:0210:SSA_CNTY |
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R | SSA_CNT | ACCL:L1B:0210:SSA_CNT |
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R | SSA_CNTU | ACCL:L1B:0210:SSA_CNTU |
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SRF Interlocks - Per Rack (A or B) |
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R | CPLRVAC[A,B]_FLT |
Coupler vacuum |