Reports until 17:40, Wednesday 06 April 2016
H1 SEI
jeffrey.kissel@LIGO.ORG - posted 17:40, Wednesday 06 April 2016 (26473)
HAM6 Vent / Damper Install Progress
J. Warner, N. Kijbunchoo, C. Gray, J. Kissel, K. Kawabe

We've made good progress today. Two of the corner's new damping systems are completely installed and characterized (analysis of data to come). That's Corner 1 and Corner 2's blade tip dampers, and the Horizontal and Vertical GS13 can dampers on Corner 2 and Corner 3. We've also re-installed the hardest of the inner and outer walls on Corner 1.

Schedule Status:
On the docket tonight:
- Process and post today's B&K hammer results
- Re-tune tune the smaller Tuned Mass Dampers

Up for tomorrow:
- Characterize the free blade and free cans again (it's quick, and we want to be consistent)
- Install of Corner 3's blade tip damper (the last one)
- Characterize the blade damper
- Install of Corner 1's GS13 can dampers (horizontal and vertical; the last one)
- Characterize the cans
- Re-install all of the walls and trim mass
- Install newly-retuned tuned mass dampers on all blades
- Float and balance the table

For Friday:
Begin close out checklist.

This puts us maybe ~1/2 a day behind schedule from E1600092. We'll discuss if we've made it back on schedule by lunch tomorrow.

Attached are some pictures of the days work, both of the damper installation, as well as some publicity photos of the stuff on top of HAM6. To entice you, I've attached the best pictures from both .pdfs in their raw form.

Stay tuned for characterization results of the two corner's blade tip dampers. I can tell you right now that we have too little coherence with the B&K up at ~1-2 kHz, so there won't be much to show on the Can Dampers. However, we've audibly compared damped vs. undamped cans with impacts from a metal wrench and there's a satisfactory "clunk" instead of multi-tone "ding."
Images attached to this report
Non-image files attached to this report