Mayank, Sheila
We now have a number of power measurements at the HAM3 viewport, with corresponding estimates of the beam spot position on PR2 (from July 2024 78878, yesterday's measurement of 8mW at PR3 yaw -74 urad 82722)
| date range | PR3 yaw slider value | Y2L coefficient | spot position on PR2 (in the plus Y direction from the center of the optic) | power measured at HAM3 viewport [mW] | |
| July 2018 until July 2024, except for a few days | 152 | -7.4 | 14.9 | 47 | |
| July 5 2024 | 132 | 28 | |||
| July 5 2024 | 110 | 19 | |||
| July 5 2024 | 100 | 17 | |||
| July 2024- Feb 6 2025 | 100 | -6.25 | 12.588 | ||
| May 21st 2024, and Feb 6th- Feb 10th 2025 | -74 | -3 | 6 | 8 | |
| Feb 10 2025 | -230 | to be measured | to be measured |
We used Elenna's new calibration of PRC power 8724 to estimate that we have 2.53kW of power in the PRC beam.