Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):

• We solved the problem with the OSEMs: cables had been plugged into the confusingly named "PD current monitor" outputs (actually LED current monitors), not the "OSEM outputs".
• We solved a problem with the real-time model freezing which turned out to be the IO chassis having lost power.
• We took some mass off the IM to allow for the weight of the cables, and readjusted it in pitch and roll.
• We aligned the IRM to the IM and set the OSEMs to mid-range.
• We added ballast to the BF.
• We changed the receptacles for the SF-BF rod. The low receptacle did not fit properly into the BF keystone and Hirata-san had to file it.
• We fixed a broken wire on the BF yaw pico, retested the pico and added the BF cap.
• We cabled and tested the BF cap picos.
• We lifted the BF and weighed and balanced it.
• We installed the SF ring and brought in the SF.
• We installed the Cu segments on the SF.
• We cabled the SF LVDT and did a quick test (not a full calibration).
• We replaced non-vacuum compatible cables in the PI, removed various sticky labels and wiped it with ethanol.
• We tried to hook the SF-BF rod but found the hole in the hex cable clamp was too small for the 8 mm rod head. We enlarged the hole but then found the PEEK pieces were too loose. We tried using foil, but then managed to lose a PEEK piece into the BF, so we will need to remove the cap of the BF to get it.

Plan for week of 9/4

Mark, Fabian, Enzo (Tue-Fri), Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun (Thu, Fri)

• Retrieve PEEK piece from BF.
• Crane SF back in.
• Suspend BF/IRM/IM/RM/BS.
• Test SF FR.
• Calibrate SF LVDT.
• Install SF cap; route cables.
• Lift and weigh SF/BF/IRM/IM/RM/BS.
• Adjust SF ballast.

Plan for week of 9/13

Mark (except Wed), Fabian (except ASJ), Enzo, Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun

• Prepare magnet ring.
• Bring in PI.
• Route cables.
• Suspend SF/..., adjust tilt of SF and total mass.
• Adjust damper gap.

Vacation Info

Mark: 10/16-24