• DC_readout_requirements

This page describes the system requirements before we can install the DC readout and OMC.

1. Vacuum compatible shutter - (Uniblitz? Tip/Tilt fast shutter? JPL chen/hochberg/moore
   • fast shutter?)
2. REFL port pick off?
3. Beam block for OMC DC diode reflection
4. In-vacuum connectorization of tip/tilt pigtails, OMC L PZT, and OMMT picomotor
   • Maybe 9pin D's per axis for the tip/tilts.
5. A complete parts list of all in-vacuum parts, including cabling

   1. OMC, OMMT, tip/tilt, and pickoff parts list: OMCparts

   2. In vacuum cabling: cables

6. The baked out hardware.
7. OMC PZT driver
   1. Minimum: Thorlabs PZT driver plus SRS 830
   2. Maximum: LIGO PZT driver plus digital mod/demod and servo
8. Alignment PZT drivers
   1. tip/tilt for 2 mirrors - 4 DOF
   2. Minimum: DC complementary control of 0-150 V for 4 DOF
      • (8 voltages, 2 per DOF)
   3. Maximum: LIGO PZT driver plus digital mod/demod,
      • input/output matrices and servo filters
9. CDS hardware
   1. Minimum: interface from vacuum flanges and satellite box to BNC
   2. Maximum: dual CPU PCI computer with:
      1. local frame builder
      2. bridge to 40m frame builder for selected channels
      3. ADC, DAC, and reflective memory boards
      4. wiring from ADC/DAC to cross connects
      5. wiring from cross connects to PZT and
         • photodiode hardware
      6. length and angle servo software