• KAGRA
• Subgroups
• SysInt
• IMC_O4

Upgrade IMC for O4

Schedule

Gantt chart

Links to knowledge

• Slack channel: #imc-upgrade

• Blueprint https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=12587

• Beam position on the shield of the IMC Type-C: https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=12114

• IMC Type-C shield install procedure: https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=12382

• Installing the shields and BeamDumps for IMC https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11636

The following are somewhat old but maybe useful to trace what were going on at that time.

• Locations of beam dumps in vacuum chambers of iKAGRA https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3900

• 主にAOSの立場から見たiKAGRAインストールおよびコミッショニング作業での課題と教訓 https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5202

• IOO(MCF, MCE, IFI, IMM) 3D drawing (just for working) https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2507

• About MCe transmission port https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2640

• About MCo transmission 2 beam https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2605

• About the laser guide duct https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2518

Layout Information

• https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10506

• http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/IOO/OutputTables/Optics

• https://granite.phys.s.u-tokyo.ac.jp/svn/KAGRA/trunk/ioo/

• https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=8565

Areas involved

MCF, MCE, (PSL)

Task list

• Attach black shielding around the MCi, MCo, and MCe suspensions for mitigate stray light
  • Relocate the connector plates of these suspensions.
  • Tame the electric wires from the coil bobbins.
• Put beam dumps in the MCE and MCF chambers.
• Confirm the position of POM1
• Attach the beam dump to POM1
• Confirm the position of a mirror (and the size) for MCo oplev
• Confirm each suspension can work very well (acceptance test)
• Alignment sensing control.
  • Confirm no clipping of the beams.
• Confirm the laser beams are not hitting strange things such as coil wires and so on.
• Make the final 3D model inside of the MCF and MCE chambers before closing them.