TJ, TVo, Danny
Yesterday we changed the SR3 pointing a bit to find the Hartmann beam. We found it at about 433.7 µrad and -100 µrad for SUS_SR3_M1_OPTICALIGN_P and SUS_SR3_M1_OPTICALIGN_Y respectively while the original pointing was at 423.7 µrad and 174.4 µrad for SUS_SR3_M1_OPTICALIGN_P and SUS_SR3_M1_OPTICALIGN_Y respectively. We decided it would be useful for commissioners if we establish an SR3 pointing range that HWSY and HWSX can operate. We used the X and Y ALS beams on the Hartmann table to establish this range:
| SUS_SR3_M1_OPTICALIGN_P (µrad) |
SUS_SR3_M1_OPTICALIGN_Y (µrad) |
State of the ALS beam at HWSX | State of the ALS beam at HWSY |
| 399.9 | -52.1 | Strong | Strong |
| 399.9 | -452.1 | Strong | Fading |
| 399.9 | 27.9 | Fading | Strong |
| -150 | -225 | Strong | Fading |
| 699.9 | -225 | Fading |
Strong |
This suggests that both HWSY and HWSX can most likely operate when SUS_SR3_M1_OPTICALIGN_Y is between 27.9 µrad and -452.1 µrad and SUS_SR3_M1_OPTICALIGN_P is between -150 µrad and 700 µrad.
It is also important to note that while the SLED is on for HWSX we get a strong back reflection from the viewport (see attached image). This can be avoided with some moving around of the picomotors on the HWSX table.
