richard.savage@LIGO.ORG - posted 10:41, Thursday 03 July 2014 - last comment - 11:02, Monday 07 July 2014(12607)
Little red-haired girl saves day (again)
And she's not even here today ..... PeterK, MichaelL, JeffB, RickS Betsy located some aluminum ClassA parts yesterday that we were able to use today to improvise some strain relief for the PSL ISS PD array cables in HAM2. Jeff and Michael were able to locate some PEEK cable ties (very handy) that we used to dress the cables to the improvised bracket (see attached photos). Peter is doing one final set of electrical tests now, after which we will consider the ISS PD installation complete (and successful).
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After the last cable tie was added. All 8 photodiode electrical connections were checked. Both the lower middle left and lower right connections had to be reseated. Afterwards all diodes checked out okay. The dust particle monitor indicated zero counts for all sizes after the end of the check out.
This structure is likely to have resonances well below 150 Hz in the vertical direction, and may interfere with the Z, and probably RX and RY loops on the ISI. Please be careful when turning the ISI system back on, and watch the GS-13 signal for ring-ups. Some notching may be required on the loops.