• Detailed_Vent_Plan

Detailed Vent Plan:

-1) Preparations for vent:

• Steve will prepare baseline readings for IOOPOS, IOOANG, IPPOS and IPANG QPDs,
  • all the oplev QPDs, and any/all other QPDs that are useful. DONE.
• We might want to lock the arms, and take baseline trends
  • of the DC power on all the photodiodes that can be trended. DONE.
• Shall we keep the MC2 QPD on the transmitted beam,
  • or move it back to the oplev beam?

• OSEM_adjustment_proceedure

• Rana will lock the arms and measure the angle-to-length couplings of the ITMs. DONE.
  • If the beam is not centered horizontally on ITMX, we can think about moving it during the vent.

-0.5) Establish SRM + OO table alignment, as referenced to AP table

• Install CrystaLaser at AP. This will be like a long, IR oplev. DONE.

• Verify that this beam is co-linear with current darkport beam. DONE.

-0.1) Recenter Oplevs, check that computer systems are working (testpoints, etc) DONE.

0) Fill Vacuum with Air. DONE.

Mis-align MC2 to prevent flashes?

1) Remove Doors and Access Connectors:

• OO: ND and AC IN PROGRESS.
• BSC: ND and ITMY AC
• ITMY: AC
• ITMX: ND
• MC2: ?

2) Fix OSEMS on MC2, BS, PRM ---> IN PROGRESS. MC2 DONE.

Maybe wait on SRM till the end, since it is our reference for aligning the back-propagating beam from the DC PD, retroreflecting off of the SRM back to the DCPD.

2.5) Install half-wave plate to rotate polarization into the MC.

2.7) Install new window on OOC.

3) Install DC readout optics

• position electronics, wiring, and other necessary equipment near the OOC for biasing the TT PZTs,
  • locking the OMC, and alignment.
  • Necessary equipment includes, but is not limited to:
  • PZT driver (OMC L)
  • Lock-in Amp (SR830)
  • Cabling (many BNCs), cross-connects for Vacuum flange
  • SR560
  • fibercoupled laser DONE
  • High-Voltage power supply (for TTPZT), with cabling and cross connects to power mirrors in TWO chambers.
  • Power supply for DC PD
  • Four channel color scope
• Measure levelness of OO table with bubble DONE
• Measure levelness of BSC table with bubble DONE
• Measure levelness of ITMX table with bubble DONE

• place iris on OO table, using CrystaLaser beam as reference. DONE

• plase iris(es?) on BSC table, using CrystaLaser beam as reference. DONE (2)

• place iris on ITMX table?, using CrystaLaser beam as reference. NOT DONE. DOOR WAS NOT REMOVED.

• Move the cable stand on OOC table. DONE
• REMOVE fixed AP steering mirror on OOC table. DONE
• REMOVE weight from NW corner of OOC table. DONE
• Place 4 spherical washers to support OMC breadboard. DONE.
• Move, and place OMC breadboard. DONE.
• Remove handle from OMC breadboard. DONE.
• move OMMT assembly and place on OOC table. DONE.
• secure OMC breadboard and OMMT to table. DONE.
• Install TTPZT2 on OOC table. DONE.
• Attach cable for OMC length PZT, wire up a solution to drive it. Test that it works properly. DONE.
• Remove DCPD, install second fiber launch in its place. Lock the OMC backwards. DONE.
• Install RF pickoff mirror and next steering mirror, and OMCT mirror. DONE.
• Place remaining optics rougly on table, including squeezer optics. DONE.
• Measure levelness of OO optic table. DONE.
• Relevel the table, using the bubble and weights. DONE.
• Verify alignment of fiber beam 2 through OMC, OMMT, RF pickoff mirror, to PZT2. DONE.
• Bias tip-tilt PZT2 to the middle of its range. DONE.
• Align PZT2 to hit the AP steering mirror 1, f-beam 2 to hit SRM and retroreflect to the OMC. DONE.
• Run wiring from BSC to ITMX. Disconnect ITMX flag picomotor wiring. and replace with TTPZT1 wiring. DONE.
• Check that both TT PZTs can be powered and biased. Simultaneously! DONE.
• Remove AP steering mirror 1, replace with TTPZT1. DONE.
• Bias PZT1 to middle of its range. DONE.
• Align PZT1 so beam hits center of SRM, and then through to centers of ITMX and ITMY. NOT DONE.
• Align RF pickoff mirror so back-reflection from SRM .....DONE
  • can exit chamber. This beam can then be made co-linear

  • with that from the CrystaLaser, by moving a steering mirror on the

  • AP table.
• Align OMCT mirror. DONE.
• Now the f-beam 1, coming from the original AP table and retroreflecting from the SRM, should be
  • visible near the input to the OMC.
• Verify that OMCR and OMCT beams exit chamber. DONE.
• remove Thorlabs diode used for locking OMC backwards. DONE.
• Test that the OMMT and squeezer mirror picomotors can be controlled from the outside.
• Comission the squeezer optics.
• Relevel table again if movement occurs;
  • if so, double check alignment of fiber beam to SRM and back, and that APRF, OMCR, OMCT beams exit the chamber.

4) Fix OSEMS on SRM

5) Pack up and get out.