Reports until 17:38, Monday 13 May 2013
H1 ISC
sheila.dwyer@LIGO.ORG - posted 17:38, Monday 13 May 2013 (6341)
fiber powers, distribution box PD calibration
This is a late alog from yesterday:

I swapped the links for the internal and external PDs on the fiber distribution box.  As Daniel noticed, they were backwards.  The powers right now are:
from PSL screen ref cav trans PD= 2V (is this calibrated somewhere?)
7.7mW in fiber input to ALS fiber distribution box (the BNC monitor on the front says 0.52V, and the internal PD in beckhoff reads 2.17 V)
0.76mW in sample output
0.58mW in X arm
0.52mW in Y arm
0.446mW in squeezer beam
In the MSR there are 0.4mW, and the end station PDs report 0.170mW total with 22uW in the rejected polarization

The external PD was saturated at 10V in beckhoff when I first looked at it, and the BNC output on the fiber distribution box was 13V.  Then the reading in beckhoff dropped to 4.6V, and the BNC reading dropped to 0.6V.  The lights in the PSL enclosure seem to be on.  

The PDs in this box use the photodiode amplifier D1200543, but the gain is set by hardware switches in the box and not controlled by beckhoff so we are calling them DCPDSimple in beckhoff.  The test report says the gain is set to 30dB, this means the transimpedance is 20000 Ohm.