40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Fri Sep 14 16:39:14 2012, ericq, jenne, Update, General, First In Vac Picture mmt1.jpg
    Reply  Fri Sep 14 18:15:43 2012, rana, Update, ASC, First In Vac Picture 
    Reply  Fri Sep 14 18:18:33 2012, Jenne, Update, General, In Vac Pictures mmt2.jpg
       Reply  Fri Sep 14 18:28:25 2012, Jenne, Update, General, In Vac Pictures pzt1_light.jpgmmt1.jpgmmt2.jpgpzt2.jpgippo.jpg
Message ID: 7390     Entry time: Fri Sep 14 18:18:33 2012     In reply to: 7388     Reply to this: 7391
Author: Jenne 
Type: Update 
Category: General 
Subject: In Vac Pictures 

Quote:

After much fussing, we got a picture of MMT1 with the beam.

Using the iris doesn't seem feasible. Since it has to be significantly separated from the optic, it is hard to judge whether it is centered, especially in yaw.

It took ~30 min to get this picture. Comments on whether this kind of picture is good enough are welcomed, since there are many more to be taken.

 I've been taking more photos.  Obviously, it gets quicker as I go along and get the hang of it.  Also, I've been taking overhead pictures with the Nikon so we can see what kind of parallax there is for each snapshot.

However, I just took MMT2, and the beam is nearly falling off the side of the optic!  It seemed fine last night when Rana and I were working on it.  The MC spots haven't moved significantly (I had measured yesterday, and again a few hours ago).  WTF?

This means that I need to move the knobs of MMT1, and then redo the whole alignment chain all over again.  Lame.

 

EDIT:  MC spot positions, last night at 12:33am, and this afternoon at 2:12pm:

                        year month day hour minute       MC1pit         MC2pit          MC3pit            MC1yaw         MC2yaw          MC3yaw

./data_spotMeasurements/MCdecenter201209140033.dat      1.749759        9.744013        1.025681        -0.791683       -1.338786       -1.779958      
./data_spotMeasurements/MCdecenter201209141412.dat      1.702974        7.916438        0.986519        -0.888736       -0.170237       -1.771267

 

Attachment 1: mmt2.jpg  29 kB  | Hide | Hide all
mmt2.jpg
ELOG V3.1.3-