Sheila Craig Jenne Georgia

This afternoon we started preparing for a loss measurement of the y-arm at 1064. We aligned the arm in green, adjusting ETMY, the TMSY, and ITMY. We saw some Y-arm IR flashes on ASC-Y_TR_A and B, and maximised these with PR2 and IM4. Craig and Sheila used SR2 to align to the camera on ISCT6, however the beam looks smudgey when it centred on the camera, perhaps it is clipping somewhere. We will continue this tomorrow once ITMY has settled down after Team Hartmann’s ring heater test.