A PCAL End station measurement was performed at End Y today. Analysis Pending.
Also Fil and I went back to EY to test the PCAL Temperature channels.
This time Fil and I went down and Turn ON the PCAL enclosure bypass and then pulled the PCAL cable out of the back of the PCAL Enclosure bypass Chassis.
GPS Time 1394909058
The ndscope of these channels did not appear any cleaner when we unplugged the PCAL cable out of the back of the PCAL Enclosure bypass Chassis.
The ndscope of these channels did not appear any cleaner when we unplugged the Rx Module Temperature cable from the front of the PCAL Chassis. But the Rx Temp did go to 0.
The ndscope of these channels did not appear any cleaner when we unplugged the Tx module Temperature cable from the front of the PCAL Chassis. But Tx Temp did go to 0.
A PCAL End Station Measurement was done on the Spring Equinox (Mar 19th 2024), the PCAL team( Dripta B. & Tony S.) went to ENDY with Working Standard Hanford aka WSH(PS4) and took an End station measurements.
The ENDY Station Measurement was carried out according to the procedure outlined in Document LIGO-T1500062-v15, Pcal End Station Power Sensor Responsivity Ratio Measurements: Procedures and Log, and was completed by 10:30 am.
Measurement Log
First thing we did is take a picture of the beam spot before anything is touched!
On this particular trip I not only took a pic of the beam spot on the Rx Sensor, but I took pictures of the viewport that the PCAL beams come out of on the Rx side. I was hoping to just document where the beams can be seen on the glass. As you can see there is a surprising amount of light on the flange that hold the viewport glass. This light seems to be a reflection from the optics we have in the RX enclosure. I was able to identify which beam on the glass is which. Please see my cartoonish diagram on the back of the Log document above for more details.
Martel:
Martel Voltage source applies voltage into the PCAL Chassis's Input 1 channel. We record the GPStimes that a -4.000V, -2.000V and a 0.000V voltage was applied to the Channel. This can be seen in Martel_Voltage_Test.png . 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 above document.
Plots while the Working Standard(PS4) is in the Transmitter Module during Inner beam being blocked, then the outer beam being block, followed by the background measurment: WS_at_TX.png.
The Inner, outer, and background measurement while WS in the Receiver Module: WS_at_RX.png.
The Inner, outer, and background measurement while RX Sphere is in the RX enclosure, which is our nominal set up without the WS in the beam path at all.: TX_RX.png.
The last picture is of the Beam spots after we had finished the measurement.
All of this data is then used to generate LHO_ENDY_PD_ReportV2.pdf which is attached, and a work in progress in the form of a living document.
End Station data and Analysis has been commited to the SVN :
https://svn.ligo.caltech.edu/svn/aligocalibration/trunk/Projects/PhotonCalibrator/measurements/LHO_ENDY/
PCAL Lab Responsivity Ratio Measurement:
A WSH/GSHL (PS4/PS5)FrontBack Responsivity Ratio Measurement was ran, analyzed, and pushed to the SVN.
The analysis of this measurement produces 4 PDF files which we use to vet the data for problems.
raw_voltages.pdf
avg_voltages.pdf
raw_ratios.pdf
avg_ratios.pdf
Obligitory BackFront PS4/PS5 Responsivity Ratio:
PCAL Lab Responsivity Ratio Measurement:
A WSH/GSHL (PS4/PS5)BF Responsivity Ratio measurement was ran, analyzed, and pushed to the SVN.
The analysis of this measurement produces 4 PDF files which we use to vet the data for problems.
raw_voltages2.pdf
avg_voltages2.pdf
raw_ratios2.pdf
avg_ratios2.pdf
Lab data and analysis can be found here:
https://svn.ligo.caltech.edu/svn/aligocalibration/trunk/Projects/PhotonCalibrator/measurements/LabData/PS4_PS5/
This adventure has been brought to you by Dripta B. & Tony Sanchez.
