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Entry  Wed Apr 3 17:39:38 2013, Koji, Mechanics, Characterization, Calibration of the test PZTs before the glue test P4033491.JPGshadow_sensor_calib.pdf
    Reply  Fri Apr 5 14:39:26 2013, Koji, Mechanics, Characterization, Calibration of the test PZTs after the heat cure shadow_sensor_calib_after_bake.pdfPZTresponse.pdf
Message ID: 98     Entry time: Fri Apr 5 14:39:26 2013     In reply to: 92
Author: Koji 
Type: Mechanics 
Category: Characterization 
Subject: Calibration of the test PZTs after the heat cure 

We attached fused silica windows on the test PZTs. http://nodus.ligo.caltech.edu:8080/OMC_Lab/93

The glued assemblies were brought to Bob's bake lab for the heat cure. There they are exposed to 94degC heat for two hours (excluding ramp up/down time).

After the heat cure, we made the visual inspection.
The photos are available here.

Pre-bake
Test PZT #1: 17.4nm/V
Test PZT #2: 17.2nm/V
Test PZT #3: 30.6nm/V

Post-bake
Test PZT #1: 27.2 nm/V
Test PZT #2: 26.9 nm/V
Test PZT #3: 21.4 nm/V

Measurement precision is ~+/-20%
Spec is 14nm/V

Attachment 1: shadow_sensor_calib_after_bake.pdf  82 kB  Uploaded Fri Apr 5 15:40:47 2013  | Hide | Hide all
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Attachment 2: PZTresponse.pdf  53 kB  Uploaded Mon Apr 8 10:19:57 2013  | Hide | Hide all
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