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Entry  Wed Feb 24 00:27:14 2010, Dmass, Lab Infrastructure, Doubling, Doubling Crystal Damaged 
    Reply  Thu Feb 25 01:00:31 2010, Dmass, Lab Infrastructure, Doubling, Doubling Experiment Update! 
       Reply  Fri Feb 26 01:50:06 2010, Dmass, Lab Infrastructure, Doubling, Doubling Experiment Update! 
          Reply  Fri Feb 26 16:19:05 2010, Dmass, Lab Infrastructure, Doubling, Doubling Experiment Update! PD1AnaNoise.pdfPD2AnaNoise.pdfPD3AnaNoise.pdfPD4AnaNoise.pdf
Message ID: 619     Entry time: Wed Feb 24 00:27:14 2010     Reply to this: 621
Author: Dmass 
Type: Lab Infrastructure 
Category: Doubling 
Subject: Doubling Crystal Damaged 

I am in the process of rebuilding the Mach Zehnder with the following goal:

I want the entire experiment to live inside one box, readout included. To this end I needed to compactify the Mach Zehnder somewhat.

In realigning the ovens, I looked closer at the crystal which was giving me problems before (the exact same behavior). When I look through it, I can see what looks like damage through the center of the crystal. This is consistent with the crazy behavior I get where aligning through the center of the crystal produces terrible beam profiles.

SHG CRYSTAL:

______________________________________________

|                   //                       |

|                 //  <--- Crack?            |

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I will proceed with the experiment, having to go with some funny alignment.

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