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Entry  Fri May 28 21:32:32 2010, Alberto, Update, 40m Upgrading, MC alignment 
    Reply  Fri May 28 23:21:52 2010, Koji, Update, IOO, MC alignment 
       Reply  Mon May 31 00:10:18 2010, kiwamu, Update, IOO, MC alignment 
          Reply  Mon May 31 03:38:48 2010, Koji, Update, IOO, MC alignment MC_spot_centering.png
             Reply  Mon May 31 17:47:34 2010, kiwamu, Update, IOO, today's plan : MC alignment 
Message ID: 3012     Entry time: Fri May 28 21:32:32 2010     Reply to this: 3013
Author: Alberto 
Type: Update 
Category: 40m Upgrading 
Subject: MC alignment 

[Alberto, Kiwamu, Kevin, Rana]

Today we tried to measured the beam shape after the MC MMT1 that Jenne installed on the BS table.

The beam scan showed a clipped spot. We tracked it down to the Farady and the MCT pickoff mirror.

The beam was getting clipped at the exit of the Faraday. But it was also clipping the edge of the MCT pick-off mirror. I moved the mirror.

Also the beam looked off-center on MC2.

We're coming back on Sunday to keep working on this.

Now things are bad.

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