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.
  1. Necessary equipment includes, but is not limited to:
  1. PZT driver (OMC L)
  1. Lock-in Amp (SR830)
  1. Cabling (many BNCs), cross-connects for Vacuum flange
  1. SR560
  1. fibercoupled laser DONE
  1. High-Voltage power supply (for TTPZT), with cabling and cross connects to power mirrors in TWO chambers.
  1. Power supply for DC PD
  1. 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.