= Upgrade IMC for O4 =


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== Schedule ==
[[https://dacgit.icrr.u-tokyo.ac.jp/projects/kagra/issues/gantt|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 ==
{{{#!wiki green/solid
Note: some of the tasks can be done in parallel.
}}}
 * 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.