40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  ATF eLog  Not logged in ELOG logo
Message ID: 187     Entry time: Tue Jul 21 20:39:18 2009
Author: Dmass 
Type: Laser 
Category: PSL 
Subject: PSL Beam Scans 

I took a bunch of scans of the PSL with the Beamscan and compared them with some razorblade occlusion measurements

The first steering mirror after the beam exits the PSL was removed, and data was taken at this point in the beam path.

The numbers for the waist derived from my razorblade measurements are on the plot in green. The disagreement seems not horrible to me.

 

We should still fix the beamscan, and think about buying another (newer) one.

 

I am told that the beamscan axis drawn on the head (labeled "1" and "2"), not the slit axis is what sets the direction of the field you are sampling. Data for both vertical and horizontal spatial modes of the beam are included. There is some ellipticity to the beam that I will have to account for in choosing my (new?) mode matching solution.

 

Error bars are included on the green point, they are just small.

Attachment 1: VertPSLScan.pdf  17 kB  | Hide | Hide all
VertPSLScan.pdf
Attachment 2: HorPSLScan.pdf  16 kB  | Hide | Hide all
HorPSLScan.pdf
ELOG V3.1.3-