Gerardo, Jordan, Camilla. WP13628. ECR E2600291.

After the vacuum team vented the beam manifolds via hard closing GV1, GV2, GV5 and GV7 large gate valves, we swapped VPs at both X-arm and Y-arm adapter plates. T1200220 needs to be updated. 

Y-arm:

• Port A-1F VP3
  • Removed ASSY-D1700340-003 ZnSe VP currently installed, wrapped it to be later installed at x-arm
  • Baffle remains the same, already type-07.
  • Installed ASSY-D1700340-type02-004. Orientated with “D1700338” writing at 12 o'clock (for scattered light, see T2300387). Photo of installed VP.
  • These optics are both -type03, AR coated for 1064nm and 4.65um. To be used for CHETA beam injection. 

• A-1C VP2
  • Removed Fused Silica VP photo (camera and housing removed in 91932)
  • Swapped baffle from D2000285-v2-type09-SN004 photo to D2000285-v3-type07-SN001 photo.
  • Removed secondary VP (i.e. parts D1700342, D1100485) of D1700340) from ASSY-D1700340-003, parts stored: Optic D1100485-1-type3-SN05 with other ZnSe in VPW; Metal D1700342-V2-0001 in TCS cabinet; Orings, PEEK and Kapton will be re-cleaned. 
  • Installed VP ASSY-D1700340-003 without secondary optic, photo.  Orientated with “D1700338” writing at 9pm (for scattered light, want wedge of optic refecting any scattered light away from axis of IFO/ ITM).
  • This optics is -type02, AR coated for 1064nm and 10.6um (broad >90% transmission form 9um to 14um). Planned to be used for FLIR camera. 
• A-1C VP4
  • Removed blank
  • Swapped baffle from -v2-type01-SN004 photo to D2000285-v3-type07-SN001 photo.
  • Installed D1700340-type02-001, photo. Orientated with “D1700338” writing at 12 o'clock. 
  • These optics are both -type03, AR coated for 1064nm and 4.65um. To be used for CHETA beam injection.