ELOG - ETMX Ruby Wire Standoff GLUED

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Wed Jul 27 15:03:02 2016, sisyphus, Metaphysics, SUS, Broken wire

Wed Jul 27 16:56:47 2016, rana, Metaphysics, SUS, Broken wire

Thu Jul 28 08:42:36 2016, Steve, Update, SUS, wire clamp

Fri Jul 29 15:17:23 2016, Steve, Update, SUS, wire and clamping test

Fri Jul 29 20:12:54 2016, gautam, Update, SUS, third time - no luck

Mon Aug 1 14:09:20 2016, Steve, Update, SUS, third time - no luck

Tue Aug 9 16:19:27 2016, Steve, Update, SUS, torque driver for wire clamp

Wed Aug 10 15:34:24 2016, Steve, Update, SUS, 6 in-lbs torque driver for wire clamp screw

Wed Aug 3 00:15:39 2016, gautam, Update, SUS, ETMX suspended

Wed Aug 3 09:26:54 2016, Lydia, Update, SUS, ETMX suspended: photos 8x

Thu Aug 4 03:14:39 2016, gautam, Update, SUS, ETMX suspended

Fri Aug 5 02:17:10 2016, gautam, Update, SUS, ETMX Ruby Wire Standoff Ready for Gluing 8x

Fri Aug 5 04:43:09 2016, Koji, Update, SUS, ETMX Ruby Wire Standoff Ready for Gluing

Fri Aug 5 18:21:28 2016, gautam, Update, SUS, ETMX Ruby Wire Standoff GLUED 11x

Sun Aug 7 14:53:39 2016, ericq , Update, SUS, ETMX Standoff gluing was successful

Tue Aug 9 00:44:43 2016, gautam , Update, SUS, ETMY patch-up

Tue Aug 9 15:27:57 2016, gautam , Update, SUS, ETMY patch-up

Wed Aug 10 03:08:03 2016, gautam , Update, SUS, ETMY patch-up

Wed Aug 10 23:45:03 2016, gautam , Update, SUS, ETMY re-suspended 7x

Thu Aug 11 00:20:41 2016, Koji, Update, SUS, ETMY re-suspended

Thu Aug 11 11:56:40 2016, gautam, Update, SUS, ETMY re-suspended

Mon Aug 15 18:28:15 2016, gautam, Update, SUS, Air-bake preparation

Tue Aug 16 08:04:49 2016, Steve, Update, SUS, ETMY had Aluminum bridge

Tue Aug 16 21:54:27 2016, gautam, Update, SUS, Air-bake - IN PROGRESS

Wed Aug 17 08:47:43 2016, ericq, Update, SUS, Air-bake finished

Wed Aug 17 23:00:57 2016, gautam, Update, SUS, Air-bake of towers

Thu Aug 18 08:17:16 2016, Steve, Update, SUS, wire clamping preparation

Thu Aug 18 14:14:20 2016, gautam, Update, SUS, Air-bake of towers - finished

Fri Aug 19 22:51:12 2016, gautam, Update, SUS, ETMs first-contacted

Sun Aug 21 16:23:05 2016, gautam, Update, SUS, ETMX suspended

Mon Aug 22 13:06:11 2016, gautam, Update, SUS, ETMY suspended

Mon Aug 22 18:04:24 2016, gautam, Update, SUS, ETMY OSEMs inserted

Tue Aug 23 19:35:38 2016, gautam, Update, SUS, ETMY back in IFO 10x

Thu Aug 25 21:11:43 2016, gautam, Update, SUS, ETMY back in IFO

Fri Aug 26 11:35:44 2016, gautam, Update, SUS, ETMY UL sensor problematic

Fri Aug 26 14:05:38 2016, Steve, Update, SUS, ETMY UL sensor problematic

Fri Aug 26 14:09:46 2016, ericq, Update, SUS, ETMY UL sensor problematic

Sun Aug 28 21:40:11 2016, gautam, Update, SUS, ETMY UL sensor problematic

Mon Aug 29 09:37:05 2016, gautam, Update, SUS, ETMY UL sensor problematic

Mon Aug 29 14:42:06 2016, gautam, Update, SUS, ETMY Satellite box diagnostics

Fri Aug 26 17:48:14 2016, gautam, Update, SUS, bounce mode coupling reduction

Mon Aug 29 21:53:14 2016, Lydia, Update, SUS, ETMY bounce mode coupling

Tue Aug 30 20:26:36 2016, gautam, Update, SUS, ITMY installed

Wed Aug 31 18:07:43 2016, Johannes, Update, SUS, ITMY free swinging

Wed Aug 31 22:09:18 2016, gautam, Update, SUS, Y arm locked to Green

Thu Sep 1 08:30:24 2016, Steve, Update, SUS, ITMY_UL is sick

Tue Sep 6 20:30:56 2016, rana, Update, SUS, ITMY_UL is sick

Tue Sep 13 11:00:59 2016, Lydia, Update, SUS, ETMY UL glitch returned

Thu Sep 1 19:59:22 2016, Johannes, Update, SUS, IR mode flashes in Y arm

Fri Sep 2 21:09:08 2016, gautam, Update, SUS, Y arm locked in air

Tue Sep 6 20:45:14 2016, gautam, Update, SUS, X arm test masses back in chamber

Thu Sep 8 22:12:36 2016, gautam, Update, SUS, X arm in place, locked to green, IR flashes visible

Fri Sep 9 17:50:02 2016, gautam, Update, SUS, Heavy doors on BS-PRM, ETMY chambers

Sat Sep 10 14:26:01 2016, rana, Update, General, PRM SRM alignment

Mon Sep 12 17:15:22 2016, Johannes, Update, General, PRM SRM alignment

Thu Sep 1 19:18:14 2016, Johannes, Update, SUS, ITMX and ETMX preemptive table leveling 8x

Fri Sep 2 21:15:53 2016, gautam, Update, SUS, ITMX and ETMX preemptive table leveling

Thu Sep 1 15:43:16 2016, rana, Update, SUS, OSEM adjustments

Mon Sep 5 19:57:24 2016, Osamu, Update, SUS, OSEM adjustments

Message ID: 12381 Entry time: Fri Aug 5 18:21:28 2016 In reply to: 12377 Reply to this: 12382

Author:	gautam
Type:	Update
Category:	SUS
Subject:	ETMX Ruby Wire Standoff GLUED

The latest twist in this apparently never-ending saga was that even though fine pitch balancing was achieved, the wire was out of the groove on both sides!
I rectified this situation in the morning, did the fine pitch balancing in the afternoon
Koji's suggestion of adjusting the OSEM holding plate totally did the trick, all four magnets are reasonably well centered relative to the vertical now...
After the latest round of fine pitch balancing, we are now tilted in pitch backwards (i.e. towards the AR face) by <0.7mrad.
Prior to gluing, I visually inspected the optic to check that (see attachments):
- Wires are in grooves on both sides
- Unglued ruby standoff has the correct "rotation", i.e. that the wire contacts the standoff after the groove has started, and leaves it before the groove ends, since the groove doesn't go all the way around the standoff
- Section of wire around the bottom half of the optic has no obvious kinks/other funny features
- Unglued standoff is in contact with the barrel
- All magnets are well clear of teflon in OSEM coils on both sides
Eric also checked the frequencies of the various modes (PIT, YAW, POS and SIDE) by looking at the power spectrum of the free-swinging error signals on the coils. The pitch mode is now softer than before, at ~710mHz
We then proceeded to glue the optic, using a needle to apply the glue (optic was clamped using face EQ stops, bottom EQ stops were not engaged as we felt this would affect the fine pitch balancing
During the process, it looks like we may have inadvertently gotten some glue onto the wire (see attachments) - it doesn't look like any has seeped into the groove itself, but there is definitely some on the wire. We can possibly try cleaning this once the optic is out. In the worst case scenario, we will have to loop another section of wire, but the fine pitch balancing should be unaffected provided we did not perturb the optic too much
Bob has said the large oven will be available to bake the cages on Tuesday, August 9th. By this time, we should have ETMY suspended as well (we were unable to glue the knocked off magnet on ETMY as the glass bowl we had for soaking the edge of the optic in acetone to remove the epoxy residue broke while I was assembling the various pieces of Teflon inside it. Steve is procuring a new one on Monday). It is still unclear when we can vacuum bake the two ETMs...