iKAGRA PR2 alignment & Beam Profile Measurements

Date: 2016/3/3

Workers: Michimura,Ushiba,Furuhata,Kambara, Aso

Objectives

• Center the beams on PR2 and PR3 mirrors
• Measure the beam profile in front of PR2 and PR3

Procedure

• Enter the tunnel, check necessary tools
• Setup KOACH filters near the PR3 chamber
• Setup KOACH filters near the PR2 chamber
• Open the flange of PR3 (on the +X side)
• Open the flange of PR2 (both -X and +X sides)

• Lock the MC and send the beam from IMMT2 to PR2 with low power (<2mW)

• Center the beam on PR2 using IMMT2 picomotors
• Center the beam on PR3 using PR3 picomotors
• If the beam on PR3 is too dim and difficult to align
  • Declare the laser hazard area. Distribute laser goggles to people in the center area
  • Increase the power from MC (to 25mW or so)
• Measure the beam profile in front of PR2 using the middle size beam profiler
• Measure the beam profile in front of PR3 using the large beam profiler
• Stop the beam from MC
• Declare the finish of the laser hazard
• Close the flanges
• Cleaning around the chambers
• Stop KOACH filters

Necessary items, tools

• Middle size beam profiler (Found one near the MCF clean booth. Check with Doi-san)
  • A stand to hold it at the right height
• Large size beam profiler (Doi-san's room)
  • A height adjustable table (Found two of them near the PR3 on +Y side)
• Two PHS phones for communication between PR and BS area clean booths (or transceivers)
• Two sets of floor KOACH
• Clean suits and inner ware
  • Chamber compatible type
  • Found many L and M in the laser room. For other size, we need to bring them from the data analysis building.
• A wrench to turn the bolts for the flanges (in the red tool cabinet near PR2 clean booth)
• A PC (or two) for controlling the picomotor (will use one of the DGS mac books)
  • Prepare a joypad as a backup (Found one in the PR2 clean booth)
• A lot of laser goggles (In a cardboard box near the entrance to PR3 clean booth)
• Sensor cards (check with IOO people)
• IR viewer (Found two near the MCF chamber. Check with IOO people)

Items to be brought into the tunnel

• Large beam profiler
• Clean suits (except for L and LL)
• PHS (2)

Notes

• Divide the team of 5 into 2-2-1 (PR area - BS area - outside the clean booths)
• Who will operate the MC: Enomoto-kun will be in Kamioka this week.