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Message ID: 1724     Entry time: Wed Jul 8 18:46:56 2009
Author: Dmass 
Type: AoG 
Category: Electronics 
Subject: Beam Scan Funky 

The beam scan (which has been living in the bridge subbasement for a bit now) is in a state of imperfection.

I noticed that:

  • The waist reading seems to change by not insignificant amounts as you move the spot across the head, even for just small perturbations about the center.
  • None of the features which require two slits seem to be working (unsure if this is software or hardware related)

I took some pictures to try and illuminate the situation - The inverted images are included to make it easier to see the flecks (?) in the slits

I am not sure how to figure out if any bit of the scan is/has been fried.

 

Pending further investigation, enjoy large error bars in your scan measurements!

 

PICTURES OF BOTH SLITS ON THE BEAMSCAN HEAD:

Attachment 1: beamscanhead3.png  699 kB  | Hide | Hide all
beamscanhead3.png
Attachment 2: beamscanhead6.png  695 kB  | Hide | Hide all
beamscanhead6.png
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