Reports until 20:41, Tuesday 16 December 2025
H1 TCS
matthewrichard.todd@LIGO.ORG - posted 20:41, Tuesday 16 December 2025 (88565)
CHETA build log -- Tuesday 12/16

M. Todd, G. Vajente, L. Dartez


Tuesday 12/16

  1. This morning we got the power monitor working with the old ICS computer that seemed to have the software on it already. We were not able to get the QPD software working because it requires Windows10 or newer; of course, this is only temporary because the other signals will be routed into the bekhoff eventually.
  2. We got the package that arrived today with the beam profiler, and pins for the PDs. We took out the socket from one of the PD boards, but decided to have the chassis machined which should allow the sockets to fit in the chassis correctly.
  3. We began, and made significant progress, on the alignment process for the optics. We got the beam mostly aligned well through all the optics, including lenses, to the output of the optics table. A few caveats
    1. We added a dogleg to the initial laser path so that the cables going to the feedthrough panel would not interfere with the laser .
    2. The first leg of the beam path along the long edge nearest to the rotation stage does not have enough room and will need to be readjusted.
    3. We will want to put the profiler in near the exit to see if the telescope is functioning as designed.
    4. The ZnSe lens needs to be mounted as well as the flipper. We still need to test the flipper.