A PCAL EndX Station Measurement was done on 2024-07-02, the PCAL team (Dripta B. & Francisco Llamas.) went to EndX with Working Standard Hanford aka WSH(PS4) and took End station measurements using T1500062-V17 as a guide.
Measurement Log
First thing we did was take a picture of the beam spot before anything is touched!
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.
Plots of inner, outer, and background measurement while WS sphere is in the RX enclosure with both beams on it and RX with both beams : WS_at_RX_BOTH_BEAMS.png
Then placed the Working Standard (PS4) in the path of the INNER Beam at the TX module.
Then the Working Standard (PS4) in the path of the OUTER Beam at the TX module.
A background measurement.
Took the Working Standard and put it in the RX module to get the INNER Beam.
Then the OUTTER Beam in the RX Module.
And a Background.
We remove the beam block and give the Working Standard Both Inner and Outer Beams at the SAME TIME while it's at the RX module.
We also put the RX sphere back to the RX module and put both beams on it at the same time. Like nominal opperation when the PCAL lines are turned off.
Then we take a background.
The last picture is of the Beam spots after we had finished the measurement.
All of this data and Analysis has been commited to the SVN or GIT:
https://git.ligo.org/Calibration/pcal/-/tree/development/O4/measurements/LHO_EndX/tD20240702?ref_type=heads
This adventure has been brought to you by Dripta B. & Francisco.
This is a late alog due to the updates in the procedure and the trends document.
