PV Name | Purpose | EGU | Limits |
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KLYS_LLRF:IN20:RH:LOB_PDES | Desired Phase used by LOB local feedback | degrees; absolute |
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KLYS_LLRF:IN20:RH:LOB_P | Desired Phase for Beam-based feedback only | degrees; absolute | none provided- to be calculated by beam-based feedback |
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KLYS_LLRF:IN20:RH:L0B_PAVG | actual phase readback (avg of multiple channels): used by beam-based feedback, slc-aware readback arrys, | degrees; absolute | none provided |
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KLYS_LLRF:IN20:RH:L0B_ADES | Desired Amplitude (or Power?) used by LOB local feedback | volts; absolute | HOPR, LOPR |
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KLYS_LLRF:IN20:RH:L0B_A | Desired amplitude (or Power?) for beam-based feedback only | volts; absolute | HOPR, LOPR |
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KLYS_LLRF:IN20:RH:L0B_AAVG | actual amplitude readback (avg of multiple channels): used by beam-based feedback, slc-aware readback arrys, | volts; absolute | HOPR, LOPR |
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KLYS_LLRF:IN20:RH:G_L0_FB_CTL | When this in PV is ON, beam-based feedback locks out others users and other applications from setting L0B_A/P, or L0B_ADES/PDES, and the local feedback is turned off. Beam-based feedback is responsible for setting this PV ON when starting, setting it OFF when stopping. |
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- These PV names and usages are a template for L1S and the BC1 energy beam-based feedback
- TBD: the _A, _ADES, _AAVG may be power, not voltage - may need to use _V, _VDES, _VAVG - Dayle to confirm
RESOLVED:
- The Beam-based feedback takes precidence over local feedback, other applications, and user inputs. when Beam-based feedback is on, local feedback and user other inputs are disabled
- the L0B_A, L0B_P PVs will be an absolute value, not a delta.
- Both amplitude and phase will be available as an actuator for the Beam-based feedback for DL1. Only one of these will be used at a time
UNRESOLVED:
- What to do with Local feedback when there are user inputs Beam-based feedback is OFF, and there are other applications or users trying to set amp / phase (such as correlation plots, etc)?
- TBD: the _A, _ADES, _AAVG may be power, not voltage - may need to use _V, _VDES, _VAVGAre all Klystrons and TCAVs to be made available