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Entry  Wed Sep 26 17:09:15 2012, Den, Update, SUS, TT 
    Reply  Thu Sep 27 15:21:04 2012, Steve, Update, SUS, TT height adaptor & PTICH damping 09271201.PDFIMG_1656.JPGIMG_1654.JPG
       Reply  Fri Oct 12 10:39:45 2012, Steve, Update, SUS, TT PITCH damping IMG_1709.JPG
          Reply  Fri Oct 12 14:01:33 2012, Koji, Update, SUS, TT PITCH damping 
             Reply  Fri Oct 12 16:59:26 2012, steve, Update, SUS, TT PITCH damping 
       Reply  Wed Oct 17 08:30:49 2012, Steve, Update, SUS, PTICH damping needed 
          Reply  Wed Oct 17 11:15:05 2012, Den, Update, SUS, PITCH damping needed pitch_damping.png
             Reply  Thu Oct 18 02:42:38 2012, Den, Update, SUS, PITCH damping needed 7x
                Reply  Fri Oct 19 18:30:07 2012, Den, Update, SUS, PITCH damping needed damp.pngpitch.png
                   Reply  Sat Oct 20 01:23:56 2012, Den, Update, SUS, PITCH damping needed P1010059.jpgP1010058.jpgP1010060.jpg
                      Reply  Sat Oct 20 20:37:55 2012, Den, Update, SUS, PITCH damping needed DSC_4778.JPGpitch.JPGyaw.JPGDSC_4776.JPG
                      Reply  Mon Oct 22 11:26:12 2012, rana, Update, SUS, PITCH damping needed 
                         Reply  Tue Oct 23 01:46:53 2012, Den, Update, SUS, PITCH damping needed Mirror_Holder_ECD_NEW_DRAWING.PDFTT_DAMPING_DRAWING.PDF
                            Reply  Tue Oct 23 17:12:30 2012, Den, Update, SUS, PITCH damping needed simple_drawing.PDF
                               Reply  Wed Oct 24 01:02:10 2012, Koji, Update, SUS, PITCH damping needed 
                                  Reply  Mon Oct 29 18:14:55 2012, Den, Update, SUS, PITCH damping needed DSC_4787.JPGDSC_4791.JPG
                            Reply  Tue Oct 23 18:18:29 2012, Jenne, Update, SUS, PITCH damping needed 
Message ID: 7568     Entry time: Wed Oct 17 11:15:05 2012     In reply to: 7566     Reply to this: 7571
Author: Den 
Type: Update 
Category: SUS 
Subject: PITCH damping needed 

Quote:

 

 Pitch damping solution needed! It should be in the machine shop already.

I think we can put ø2mm × 10mm long magnetic material inside 4 holes with actuation magnets. Then magnetic field on the other side of the mirror will be close to one produced by actuation magnet. Magnetic cylinder center of inertia will be in the vertical plane where mirror's center of inertia is. So this should not change alignment significantly. Eddy current dumping will be applied to the end of the magnetic cylinder opposite to the magnet using aluminium disks, we have them in the clean room.

pitch_damping.png

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