• KAGRA
• Subgroups
• VIS
• TypeB
• Minutes

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 1/14

• Etc

  • Mark inventoried lots of items and updated the Status page.

• SR2
  • Hirata-san helped with installing the obelisk on the LBB, and added counterweights to get the LBB level and at the right height for the first rough alignment. However the springs were still at or near the top stops, so he later pulled down the LBB with excess mass, locked the blades at the bottom of their range and reset the LBB rods and damping magnet ring, aiming off by 10 mm so that it would be correct when the LBB was allowed to rise to midrange on the blades. He left it pressed down for now so that Hirose-san could apply FC. Early next week he will release it and do the final ballasting.
  • Hirose-san applied and removed FC on both sides of the optic for cleanliness.
• SR3
  • Enzo installed IM damping filters.
  • Mark installed a BIO Converter for the stepper remote enable (which will eventually also be used for the WD).
  • Fabian researched buoyancy compensation and pre-applied as much as possible to SR3. The total compensation needed is 0.19 mm for F0, 0.48 mm for SF and 0.46 mm for BF, total 1.23 mm. 1.0 mm had been applied with the jacks. The initial plan was to apply the calculated amounts at each level but then offset F0 1.0 mm lower to undo the jack adjustment. However SF was stuck approximately 1 mm lower than it needed to end up, so the buoyancy correction for it will have to be done at F0, and F0 will end up quite close to nominal.
• Fabian also offloaded the IM pico yaw adjustment done by Enomoto-kun-tachi to the F0 yaw stepper. This left the OSEMs well-centered, so we will not need to adjust them and the LBB can be released.
• SRM
  • Enzo fixed the broken triple in-air pico adapter cable and we plugged it back in.
  • Fabian calibrated the F0 FR.
  • Enzo and Terrence installed the arc weights and geophones, tuned and centered the IP, and centered and calibrated the FRs.
  • Mirapro helped us with the camera viewport issue by giving us a gasket of the same type but a different brand from their stock, which snapped easily into place. We then installed the viewport on the tank. Kokeyama-san will help us add the camera and camera LAN cable next week.
  • Simon gave us all the remaining items for the SRM OL except the 3D stage for the LEN QPD.

Plan for week of 2/4

• Mark, Enzo, Fabian, Terrence at Kamioka Mon-Fri.
• Hirata-san at Kamioka Mon+TBD.
• Etc
  • Split SR2, SR3 and SRM RT models.
  • Get rid of the power reel behind SRM and plug stuff into the new power point instead.
• BS
  • Run BNC cables for stepper remote enable, plug into BIO, debug.
• SR2
  • Do buoyancy correction.
  • Install camera viewport.
  • Install camera.
  • Run BNC cables for stepper remote enable, plug into BIO, debug.
• SR3
  • Release LBB.
  • Ballast LBB.
  • Install camera viewport.
  • Install camera.
  • Debug stepper remote enable.
• SRM
  • Install camera.
  • Hook LBB
  • Ballast LBB.
  • Do buoyancy correction.
  • Set up OL.
  • Debug stepper remote enable.

Vacation/Travel Info

• Constitution Day, 2/11.
• Mark and Enzo at KIW in Perugia, 2/12-18.
• Enzo vacation, 3/5.
• Enzo et al. Farewell Party, 3/7.
• Enzo at JPS then final vacation, 3/13-29
• Terrence's last day, 3/29.