J. Freed, J. Kissel, TJ. Shaffer, B. Weaver, M, Pirello

Continuing from 90581 (Notes are stored here).Today we completed all of the inside optical fiber install, Got our first light out of SPI, Managed to send it from one ham table and back again.  As well as align the reference interferometer to produce a beat note with decent efficiency (~75%).

We also connected the HAM2 wiring from HAM2 feedthrough to TIA to CDS system.

In order we did:

• Meas fibr and Ref fiber are installed including spools.
• connected the HAM2 wiring from HAM2 D4- F10 feedthrough to TIA Chassis to CDS system.
• Got laser light out on ISIK
• Realigned the SPI reference interferometer and got a beat note with an efficiency of ~75%
• Realigned the MEAS beam path and managed to get light on both of SPIs QPDs
• HAM2 was unlocked and light is still on the QPDs

SPI_QPD_HAM2_Unlock.png  Shows a screenshot of ndscope screens of the QPDs. Note the purple areas. The HAM2 unlock did show an effect on ISIK QPD (QPDB) but QPDA was insensitive to the Unlock.