Reports until 19:39, Wednesday 13 September 2017
LHO VE
kyle.ryan@LIGO.ORG - posted 19:39, Wednesday 13 September 2017 (38632)
Removed IP7
Kyle R., Gerardo M., Mark D. (Apollo), Tyler G. (Apollo) 

Spun-up and valved-in Diagonal Turbo pump (NOTE: Valve only partially opened as actuator mechanism is galling and will stick permanently soon).  Isolated and vented IP7 with room air.  Removed IP7 from isolation gate valve.  Installed zero-length reducer with 1.5" pump port valve and evacuated volume between closed gate and zero-length reducer.  Installed blank flange on IP7.  

Leaving the Turbo valved-in overnight and will only close following the removal of IP8 tomorrow so as to minimize valve cycling -> hopefully valve will close one more time before failing completely.  

2500 L/sec large ion pumps (IPx) are being removed as opportunities arise so as to be refurbished.