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Mon Mar 4 16:46:31 2013, yuta, Update, SUS, oplev calibration for PRM 
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Tue Mar 5 17:09:30 2013, yuta, Update, SUS, oplev calibration for ITMY 
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Tue Apr 2 15:58:40 2013, Jenne, Update, SUS, oplev calibration for ITMX, BS 
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Tue Apr 2 16:13:10 2013, rana, Update, SUS, oplev calibration for ITMX, BS
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Tue Apr 2 16:55:34 2013, Jenne, Update, SUS, oplev calibration online for ITMs, BS, PRM
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Tue Apr 2 18:19:30 2013, Jenne, Update, SUS, BS, PRM oplev servos improved 
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Tue Apr 30 22:40:57 2013, Jenne, Update, SUS, oplev XY-plots reflect new calibration
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Sun Sep 22 22:05:10 2013, rana, Update, SUS, oplev XY-plots reflect new calibration
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Thu Oct 3 01:06:48 2013, rana, jenne, Update, SUS, oplev XY-plots reflect new calibration
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Thu Oct 3 09:49:49 2013, Steve, Update, SUS, ETMY oplev laser is sick
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Tue Nov 5 19:55:12 2013, rana, Update, SUS, oplev XY-plots reflect new calibration
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Message ID: 8232
Entry time: Tue Mar 5 17:09:30 2013
In reply to: 8221
Reply to this: 8389
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Author: |
yuta |
Type: |
Update |
Category: |
SUS |
Subject: |
oplev calibration for ITMY |
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[Manasa, Sendhil, Yuta]
We calibrated oplev for ITMY. Calibration factor for C1:SUS-ITMY_OL(PIT|YAW)_IN1 are;
OLPIT: 6.29 +/- 0.11 counts/mrad
OLYAW: 5.74 +/- 0.09 counts/mrad
Note that there was ~10% of coupling between pitch and yaw. This is large considering statistical error, but I think this is from QPD mounted rotated (by ~5 deg).
Method:
Same as in elog #8221.
Result:
moved in y: moved in x: 
micrometer OLPIT OLYAW
moved in y 3.14 +/- 0.05 0.27 +/- 0.03
moved in x -2.87 +/- 0.04 0.17 +/- 0.03 (counts/mm)
Measured the path length of ITMY oplev returning beam was 2000 +/- 20 mm. This gives you the calibration factors above.
~10 % coupling between OLPIT and OLYAW can be explained by QPD rotation by ~ 5 deg, which seems not unreasonable. |