[Rick, Sundae, Niko]

On Tuesday we investigated a loss of power range for the laser in the EX pcal transmitter module. Rick adjusted the pitch and yaw of the AOM alignment, as well as varying the distance from the transducer to try and optimize the diffraction efficiency. We were able to increase our offset voltage maximum from 6.2 V to 8 V.

We then did Tx module maintenance with the new AOM alignment (EX_06/25_tx_maintenance.pdf, EX_06/25_transfer_func.jpeg).

We finished off the long maintenance day with an end station calibration (EX_06/25_calibration.pdf, EX_06/25_beam_spots.jpeg). The beam spots are still centered (even after adjusting the AOM). Will comment later with data quality analysis.