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Entry  Mon May 17 19:42:11 2010, Jenne, Update, IOO, First steps toward MC mode measuring 
    Reply  Tue May 18 01:40:56 2010, Koji, Update, IOO, First steps toward MC mode measuring 
       Reply  Tue May 18 16:44:35 2010, Koji, Update, IOO, First steps toward MC mode measuring 
    Reply  Tue May 18 12:04:13 2010, rob, Update, IOO, First steps toward MC mode measuring 
Message ID: 2942     Entry time: Tue May 18 01:40:56 2010     In reply to: 2941     Reply to this: 2949
Author: Koji 
Type: Update 
Category: IOO 
Subject: First steps toward MC mode measuring 

OK. Don't worry. This is just an initial confusion which we also had for the suspensions a while ago.

The faraday must be clamped. It shakes the table terribly but it is fine. The leveling may change a bit but should be small enough. Otherwise, just tweak the weights. In fact, the faraday has enough large apertures and we hope we don't need to move it again, as far as the MC incident beam is not moved. But if necessary, we don't move the mirrors but move the faraday itself.

Usually the alignment of the MC is taken by MC2/MC3 such that we don't  move the refl. But if you think what have moved is the MC1/MC3 (i.e. activity in the IMC chamber), take the alignment of the MC1/MC3.

It is just a matter of time to get TEM00. If you get TEM11, it is already close. If you align for TEM11, it is enough aligned to lock TEM10 or TEM01. Once you got better mode, align for it again. Eventually you will get TEM00.

The leveling may change by moving the optics and the weight again. But once the leveling is recovered by arranging the weights somewhere else,
the pointing must be fine again. If necessary, You can remove two optics for squeezing injection (strange motorized rotating mirror and a mount sticking out from the table to south.)

Yes, we need to move the PZT mirror. For the connection, only Steve can give us the right way to do it. If it is too much hussle, just move only the mirror and ignore the wiring for now.

I will update how the mirrors should be migrated from the table to the table.

 

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