ENDY Station Measurement:
During the Tuesday maintenace, the PCAL team (Jennie W. and I) went to ENDY with WSH (PS4) and took an End station measurement.
The ENDY Station Measurement was Mostly carried out according to the procedure outlined in Document LIGO-T1500062-v15. Except for the very last measurment. Rick and I have spoken about trying to reduce the light entering the Rx Sphere during a background measurement similar to measurment #9 by placing the normal PCAL enclosure covers back on before the start of the background. I somehow misinterpreted his suggestions and put the covers on for measurement #9. This change was hand written in to the measurment document LIGO-T1500062-v15 and is attached. Once we started to do the analysis I realized that Putting the covers on for Measurement #9 was a blunder because; only the measurement #9 was covered with pannels. Which means we won't be subtracting enough light from the rest of the measurements #7 and #8. Effectively ruining this measurement. So this needs to be it's own measurement on future attempts to take backgrounds with the covers on.
Before I touched anything, I took a pictures of the beam spot.
Martel:
We started by setting up a Martel Voltage source to apply some voltage into the PCAL Chassis's Input 1 channel and we record the times that a -4.000V, -2.000V and a 0.000V signal was sent to the Chassis. The analysis code that we run after we return uses the GPS times, grabs the data and created the Martel_Voltage_Test.png graph. We also did a measurement of the Martel's voltages in the PCAL lab to calculate the ADC conversion factor, which is included on the document.
There was also another error in the data when we were at the end station taking the measurement. Which lead to the BadTimeEy.pdf which is attached. A number of the plots during the time marked on the Document either had no data or had some "disturbance" during the time indicated on the document for measurment #2. We able to "salvage" some of this data by reducing the duration of our measurements from 240 seconds to 78 seconds and change the gpstime on measurment #2 to get usable data for all plots.
New Measurement #2 GPSstart time is now: 1368291685.
After the Martel, measurement the procedure walks us through the steps required to make a series of plots while the Working Standard is in the Transmitter Module. These plots are shown in WS_at_TX.png.
Next steps include: WS in the Receiver Module, These plots are shown in WS_at_RX.png.
Followed by TX_RX.png which are plots of the Tranmitter module and the receiver module operation without the WS in the beam path at all.
The last picture is of the Beam spot after we had finished the measurement.
All of this data is then used to generate LHO_ENDY_PD_ReportV2.pdf which is attached.
All data and Analysis has been commited to the SVN.
https://svn.ligo.caltech.edu/svn/aligocalibration/trunk/Projects/PhotonCalibrator/measurements/LHO_ENDY/
