• KAGRA
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• VIS
• VISMinutes20170811

Status report of the VIS on 2017/8/11

Progress report

Schedule Chart : (PDF,MPP)

• Type-A:
• Type-B:
• Type-Bp:

Type-A (Takahashi)

Past week report

[X-end]

7th(Mon)

• Adjusted the stopper for keyston in the F3.
• Adjusted the height of release sensor for the F3.

8th(Tue)

• Checked the range of FR in the F3. The range was covering the full height of keystone.
• Applied the cabling for the BF damper LVDT.

9th(Wed)

• Adjusted the position of LVDT coil in F3.
• Rearranged the cabling around the F3.
• Adjusted the load for BF again. Removed about 75g weight.
• Found the friction around the keystone of F3.

10th(Thu)

• Found the touching point causing the friction. Aligned the york in F3.
• Adjusted the load for BF again. Removed about 80g weight.
• Lifted down the EQ stop. The F3 was set on the frame lock.
• Mounted 8 ballast masses (3.5kg) on the baseplate of F3.
• Closed the cap for F3. The height of keystone was increased by fastening screws for the cap.

Plan for coming weeks

• Installation of the Filter2 in X-end.

Type B (Mark)

Past week report

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

• We finished installing the RM OSEMs and installed the new Type5-2.2 and 5-2.4 OSEM cables.
• We hung the RM and set its pitch.
• We doubled-checked the BS and RM pitch, tightened the clamps and removed the winch system.
• We installed the bottom section of the security structure to protect the RM/BS.
• We lifted the IM/RM/BS section and weighed it. It was about 1.25 kg too heavy for the new BF, so we improvised a lighter set of ballast masses.
• We installed the section of the security structure up to the BF ring, and the BF crossbars and jacks of the assembly frame.
• We brought in the new BF.
• We installed the BF-IRM rods and IRM top plate.
• We reinstalled the IM flags and other items that had been taken off to use the winch system.
• We hooked the BF-IM rod (with hex cable clamp). (We did not unlock the BF keystone.)
• We cabled and tested the IM-PIT, IM-ROL and IM-YAW picos and the BF FR stepper (but not, yet, the BF LVDT).

Plan for week of 8/14

Site closure: Mon, Tue
Vacation: Fabian (Mon-Fri)
Kamioka: Mark (Wed-Fri), Enzo (Wed-Fri), Yoshioka-kun (Wed, Fri), Ohishi (Thu-Fri).

• Remove LBB blade units from PI, then remove blades and send for remachining.
• Remove LBB rings from chamber and send for recleaning.
• Unlock BF, adjust ballast masses on IM/RM/BS to correct pitch/roll/vertical.
• Test, calibrate BF LVDT.

Mitaka: Hirata-san (Mon-Fri)

• SR Stuff

Plan for week of 8/21

Vacation: Fabian (Mon)
Kamioka: Mark, Ohishi, Fabian (Tue-Fri), Enzo, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun.

Vacation Info: Fabian: Fri 8/4 through Mon 8/21 Mark: TBD Mid-Oct

Type-Bp (Shoda)

Past week report

• PR2 tank is ready to be closed
  • PR2 Traverser had a trouble last Friday. But when I checked this week, there is no problem. We do not what caused the problem.
  • PR2 Oplev was set by Simon.
  • PR2 top chamber will be closed with Kimura-san on the week of 8/21.
• PRM Assembly started
  • Moved tools and parts from PR2 to PRM.
  • All parts are glued on the PRM properly, and the mirror have been sent to Kamioka.
  • PRM IM assembled.
  • PRM Traverser top plate and interface plate was assembled. But not yet assembled with the Traverser stage. It requires some more works. They are sitting on the 2nd floor now with half assembled.
  • The assembly frame and the hanging frame was set at the right position and horizontally.
• PRM mirror hanged
  • We used the new winch. There was no problem so far. Do we need same system for RM? How about for BS?
  • The wires are already clamped.
• RM disassembled
  • We successfully disassembled the RM which was used for test hanging. The spare mirror is now sitting on the disassembly jig.
  • RM will be hanged next week.

Plan for coming weeks

IMMT (Ohishi)

Past week report

Plan for coming weeks

Watchdog system (Tanaka)

Past week report

Plan for coming weeks

Other site works

• 8/11-8/15 KAGRA site closed
• 8/23-24 Draft Chamber Installation
• End of Aug. to Nov.: Mozumi entrance will be closed

Safety

• Incidents:
• Foreseen risks
  • Type-A:
  • Type-B:
  • Type-Bp:

Travel Plans

• Travel (Week of 8/14):
  • Takahashi: 16 - 18
  • Okutomi: 16 - 18
  • Sato:
  • Ishizaki:
  • Mark: 16 - 18
  • Fabian:
  • Hirata:
  • Enzo: 16 - 18
  • Shoda: 16 - 18
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Hashimoto(Hosei): 16 - 18
  • Yoshioka (Toyama): 16,18
  • Kozu (ICRR): 16 - 18
  • Arai (ICRR): 16 - 18
  • Kasuya (TITECH): 16 - 18
• Travel (Week of 8/21):
  • Takahashi: 21-25
  • Okutomi: 21-25
  • Sato: 21-25
  • Ishizaki: 21-25
  • Mark:
  • Fabian:
  • Hirata:
  • Enzo:
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Hashimoto(Hosei):
  • Yoshioka (Toyama):
  • Kozu (ICRR):
  • Arai (ICRR):
  • Kasuya (TITECH):

Next meeting

On 2017/8/18(Fri)