RickS, FranciscoL

After one week of having the inner beam centered on the Rx sensor (alog 78514), on June 25, we moved the beam from center to up.

The last page of EndStationLog.pdf shows a diagram of the movements that have been done and, on dashed lines, the move that were left to do. The previous to last page on file lists the voltage values after each significant step of procedure T2400163. The steps represent writing down a voltage value after a particular change to the beam position. Some highlights from the recorded values.

• ("Outer beam blocked, no target") Only inner beam at Rx detector. A change of 1 mv on the hanheld FLUKE voltmeter corresponds to ~ 7 HOPs. May bring keithleys DVM for upcoming measurements.
• ("Target off") Finalized beam movement and recorded the voltage from the Rx sensor with the inner beam only. See InnerBeamAfter.jpeg. Voltage of 1.683V is *equal* to previous position (1.683V). Fine adjustments to pitch and yaw did not improve the amplitude of the signal.
• ("Both beams") The measurement was recorded after removing beam block on outer beam and removing the target. See BothBeamsAfter.jpeg. The measurement of 3.383V is lower by 0.03% from initial measurement (3.384V).

The 'Initial' measurement changed by 11% from the last voltage measurement from the previous movement, done on June 18 (alog 78514). The initial and final voltage measurement during today procedure changed by 0.03%.