J. Kissel After Betsy and Travis successfully finished in-chamber close out (after LHO aLOG 15677), and Kyle, Gerardo, and Bubba have put the door back on (LHO aLOG 15696), I've taken H1 SUS ETMY Top2Top transfer functions on both main and reaction chains to confirm that the suspension is free and clear of rubbing. The transfer functions look spectacular. I'd call it ... wait for it ... a clean exit. I think the only other thing we should confirm before pump-down is that the ESD drive is functional by turning on the high-voltage driver, driving at ~5 [Hz] in angle, and checking optical lever for the signal, as has been done for the charging measurements. This would clear the work done by Filiberto and Richard also during this vent The new templates for this data set live here: 2014-12-18_0143_H1SUSETMY_M0_Mono_L_WhiteNoise.xml 2014-12-18_0143_H1SUSETMY_M0_Mono_P_WhiteNoise.xml 2014-12-18_0143_H1SUSETMY_M0_Mono_R_WhiteNoise.xml 2014-12-18_0143_H1SUSETMY_M0_Mono_T_WhiteNoise.xml 2014-12-18_0143_H1SUSETMY_M0_Mono_V_WhiteNoise.xml 2014-12-18_0143_H1SUSETMY_M0_Mono_Y_WhiteNoise.xml 2014-12-18_0203_H1SUSETMY_R0_L_WhiteNoise.xml 2014-12-18_0203_H1SUSETMY_R0_P_WhiteNoise.xml 2014-12-18_0203_H1SUSETMY_R0_R_WhiteNoise.xml 2014-12-18_0203_H1SUSETMY_R0_T_WhiteNoise.xml 2014-12-18_0203_H1SUSETMY_R0_V_WhiteNoise.xml 2014-12-18_0203_H1SUSETMY_R0_Y_WhiteNoise.xml
Travis, Betsy, Jason, Rick, Jim
After the noon SYS/COC/SUS telecon the chamber closeout went like this:
- Took particle counts in chamber - 20 - 0.5um size, 10 - 0.3u size, rest 0.
- Retidied the ESD cable loop after yesterdays fix which needed slack to pull out of the port.
- Blew all 4 of the large optical surfaces for 5-9 mins of N2 deionizing flow in an attempt to reduce charge.
- We attached the green lantern to the ETMy SUS and made a final count of particulate of ~2 particles per square inch.
- Took a few more pcal camera pix to compare with pix from before we attempted cleaning of the ETMy-HR.
- Released the ACB locking bracket and swung it back into place.
- Suspended the CP and the ERM, removing extra teflon payload.
- Reattached the QUAD witness plate holder now loaded with a new witness plate.
- Attached the new 1" vertical witness optic to its place on the side of the suspension frame.
- Removed all tool pans, optic covers, blowers, foil, etc. from the chamber.
- Asked Jim to unlock the ISI.
- Placed the new horizontal floor witness place and 1" vertical witness optic.
- Verified damping loops could enable on the ETMy.
- Took quick P and V TFs of the main and reaction chains.
- Called Bubba/Kyle/Gerardo to proceed with the door attachment.
Reminder the test of the ESD can be done after we have pumped down. 10-5 torr or lower.