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| Each front end at the ends Inputs via ADC: PDH signal (used to modify laser frequency) Green laser power monitor Outputs via DAC: PDH lock gain control output PDH phase adjustment control Thermal stabilization of the laser control (is controlled by PDH signal, need a filter bank in between) (need a multiplying constant which is linked to the constant controlling feedback to the coils (inversely)) Via the normal control path: ETM position control (feed into the coil outputs) |
<<TableOfContents([2])>> |
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| Vertex Front End | |
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| Inputs via ADC: | = Each front end at the ends = . Need 2 ADCs and 3 DAC channels per end |
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| Phased locked loop signal from mixer | |
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| In digital land: Frequency discriminator signal |
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| Take PLL signal and pass into a filter bank (with offset and filter). This is the fine control path. | == Inputs via ADC: == . PDH signal (used to modify laser frequency) |
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| Take frequency discriminator signal, pass into a filter bank. This is coarse control path. | . Green laser power monitor |
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| Need a epics channel to be controlled manually or via script to set ratio of sums for coarse and fine control path for ETM (so this feeds into coils for the ETM, going to need RFM channels then) | == Outputs via DAC: == . PDH lock gain control output |
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| Outputs via DAC Voltage Controlled Oscillator control |
. PDH phase adjustment control |
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| Voltage Controlled Oscillator offset control (needs a input from epics initially) | . Thermal stabilization of the laser control (is controlled by PDH signal, need a filter bank in between) (need a multiplying constant which is linked to the constant controlling feedback to the coils (inversely)) . Via the normal control path: ETM position control (feed into the coil outputs) = Vertex Front End = . Need 7 ADCs and 4 DACs at the PSL == Inputs via ADC: == . Phased locked loop signal from mixer. Need 1 per arm (2). . RFPD DC mon. Need 1 per arm (2). . Green Power mon. Need only 1. . Frequency discriminator signal. Need 1 per arm (2). == In digital land: == . Take PLL signal and pass into a filter bank (with offset and filter). This is the fine control path. . Take frequency discriminator signal, pass into a filter bank. This is coarse control path. . Need a epics channel to be controlled manually or via script to set ratio of sums for coarse and fine control path for ETM (so this feeds into coils for the ETM, going to need RFM channels then) == Outputs via DAC: == . Voltage Controlled Oscillator control. Need 1 per arm (2). . Voltage Controlled Oscillator offset control (needs a input from epics initially) Need 1 per arm (2). [[BR]] [[BR]] . this is a preliminary design for the electronics used in green locking <<ImageLink(green_electronics_diagram.png,Upgrade 09/GreenLock/Electronics/electronics_diagram ,height=400)>> <<ImageLink(green_digital.png,Upgrade 09/GreenLock/Electronics/digital_channel ,height=400)>> |
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| Somewhat related, but not a front end issue: | = Somewhat related, but not a front end issue: = . 3 Ovens, 1 each end, 1 at PSL |
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| 3 Ovens, 1 each end, 1 at PSL | . Ovens talk to a GPIB interface for temperature readback and set point |
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| Ovens talk to a GPIB interface for temperature readback and set point | ---- = Questions: = . 1) Whitening/Dewhiten signals from Green |
<<TableOfContents: execution failed [Argument "maxdepth" must be an integer value, not "[2]"] (see also the log)>>
Each front end at the ends
- Need 2 ADCs and 3 DAC channels per end
Inputs via ADC:
- PDH signal (used to modify laser frequency)
- Green laser power monitor
Outputs via DAC:
- PDH lock gain control output
- PDH phase adjustment control
- Thermal stabilization of the laser control (is controlled by PDH signal, need a filter bank in between) (need a multiplying constant which is linked to the constant controlling feedback to the coils (inversely))
- Via the normal control path: ETM position control (feed into the coil outputs)
Vertex Front End
- Need 7 ADCs and 4 DACs at the PSL
Inputs via ADC:
- Phased locked loop signal from mixer. Need 1 per arm (2).
- RFPD DC mon. Need 1 per arm (2).
- Green Power mon. Need only 1.
- Frequency discriminator signal. Need 1 per arm (2).
In digital land:
- Take PLL signal and pass into a filter bank (with offset and filter). This is the fine control path.
- Take frequency discriminator signal, pass into a filter bank. This is coarse control path.
- Need a epics channel to be controlled manually or via script to set ratio of sums for coarse and fine control path for ETM (so this feeds into coils for the ETM, going to need RFM channels then)
Outputs via DAC:
- Voltage Controlled Oscillator control. Need 1 per arm (2).
- Voltage Controlled Oscillator offset control (needs a input from epics initially) Need 1 per arm (2).
- this is a preliminary design for the electronics used in green locking
Somewhat related, but not a front end issue:
- 3 Ovens, 1 each end, 1 at PSL
- Ovens talk to a GPIB interface for temperature readback and set point
Questions:
- 1) Whitening/Dewhiten signals from Green