4-17 (Thursday) activities:

- The corner pumpdown continued, we are at ~3 Torr now, today the pumping was on for 12 hours. The pumping speed is still at (~1900 l/min). Tomorrow 5-6 more hours are needed before switching on the turbos
- A wide-range gauge (compatible with the supersucker cart) on a tee and along with a pumpdown port was installed on the freshly installed HAM6 turbo
- The HAM6 turbo was then started up - as it was its initial test -, and keeps running, ready to be valved in tomorrow
- The BSC8 annulus Ion pump is still suffering (~8E-6 Torr), but the pressure is slowly coming down
- The HAM4 annulus system has been taken care of, after switching off the Ion pump last week, now the volume is being pumped with an aux cart
- The GV5 annulus system is still being pumped by an aux cart, with the Ion pump switched off
- The leak checking was continued, all the CF flanges on the Y-manifold were leak checked: Y+ side (6 pcs.); Turbo flange (1 pc.); vent valve (1 pc.); Varian valve (1 pc., see more info at aLog 83951 - after all, it seems that it is only an internal leak). All flanges were found leak-tight.