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Entry  Thu Apr 12 08:49:14 2012, Den, Update, SUS, local damping and WFS 6x
    Reply  Thu Apr 12 14:48:44 2012, Suresh, Update, SUS, local damping and WFS 
Message ID: 6527     Entry time: Thu Apr 12 08:49:14 2012     Reply to this: 6528
Author: Den 
Type: Update 
Category: SUS 
Subject: local damping and WFS 

I tried to figure out what can add noise below 0.5 Hz to the MC_F. I compared MC1, MC2, MC3 suspos, suspit, susyaw and susside positions with damping (black curves) and without (red curves). Local damping is fine.

 mc1.png        mc2.png          mc3.png

Then I compared MC1, MC2, MC3 suspos, suspit, susyaw and susside positions with WFS on (black curve) and off (red curve). WFS add noise to MC1 and MC3 measured by osems (MC2 is fine though). WFS should change osem readings but is it a correct way to do this below 0.5 Hz (?) It looks like just a flat noise. Need to think about the conclusion.

 

 wfsmc1.png           wfsmc2.png            wfsmc3.png

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