Jason, Rana

Rana had the idea that the ITMy problem was due to the thermal electric cooler not effectively cooling the laser therefore causing the instability we are seeing as a sawtooth yaw signal.  To test this we first increased the laser power and then decreased the laser power, both times looking to see if the sawtooth changed at all.  In the attached SUM graph:

• The first jump is when we turned the laser on after closing up the receiver box
• The second jump is Rana turning the laser power up
• The third and fourth jumps are removing the Lexan viewport cover and re-aligning the oplev
• The drop at the end is me lowering the laser power

Throughout this it can be seen that the sawtooth pattern doesn't change, so that rules that idea out.  Will continue to continue to investigate...