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40m
QIL
Cryo_Lab
CTN
SUS_Lab
TCS_Lab
OMC_Lab
CRIME_Lab
FEA
ENG_Labs
OptContFac
Mariner
WBEEShop
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| 40m Log |
Not logged in |
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 Wed Jul 27 15:03:02 2016, sisyphus, Metaphysics, SUS, Broken wire 
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 Wed Jul 27 16:56:47 2016, rana, Metaphysics, SUS, Broken wire
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Thu Jul 28 08:42:36 2016, Steve, Update, SUS, wire clamp
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Fri Jul 29 15:17:23 2016, Steve, Update, SUS, wire and clamping test
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Fri Jul 29 20:12:54 2016, gautam, Update, SUS, third time - no luck
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Mon Aug 1 14:09:20 2016, Steve, Update, SUS, third time - no luck
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Tue Aug 9 16:19:27 2016, Steve, Update, SUS, torque driver for wire clamp
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Wed Aug 10 15:34:24 2016, Steve, Update, SUS, 6 in-lbs torque driver for wire clamp screw
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Wed Aug 3 00:15:39 2016, gautam, Update, SUS, ETMX suspended
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Wed Aug 3 09:26:54 2016, Lydia, Update, SUS, ETMX suspended: photos 8x
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Thu Aug 4 03:14:39 2016, gautam, Update, SUS, ETMX suspended
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Fri Aug 5 02:17:10 2016, gautam, Update, SUS, ETMX Ruby Wire Standoff Ready for Gluing 8x
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Fri Aug 5 04:43:09 2016, Koji, Update, SUS, ETMX Ruby Wire Standoff Ready for Gluing
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Fri Aug 5 18:21:28 2016, gautam, Update, SUS, ETMX Ruby Wire Standoff GLUED 11x
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Sun Aug 7 14:53:39 2016, ericq , Update, SUS, ETMX Standoff gluing was successful
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Tue Aug 9 00:44:43 2016, gautam , Update, SUS, ETMY patch-up
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Tue Aug 9 15:27:57 2016, gautam , Update, SUS, ETMY patch-up
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Wed Aug 10 03:08:03 2016, gautam , Update, SUS, ETMY patch-up
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Wed Aug 10 23:45:03 2016, gautam , Update, SUS, ETMY re-suspended 7x
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Thu Aug 11 00:20:41 2016, Koji, Update, SUS, ETMY re-suspended
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Thu Aug 11 11:56:40 2016, gautam, Update, SUS, ETMY re-suspended
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Mon Aug 15 18:28:15 2016, gautam, Update, SUS, Air-bake preparation
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Tue Aug 16 08:04:49 2016, Steve, Update, SUS, ETMY had Aluminum bridge
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Tue Aug 16 21:54:27 2016, gautam, Update, SUS, Air-bake - IN PROGRESS
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Wed Aug 17 08:47:43 2016, ericq, Update, SUS, Air-bake finished
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Wed Aug 17 23:00:57 2016, gautam, Update, SUS, Air-bake of towers
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Thu Aug 18 08:17:16 2016, Steve, Update, SUS, wire clamping preparation
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Thu Aug 18 14:14:20 2016, gautam, Update, SUS, Air-bake of towers - finished
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Fri Aug 19 22:51:12 2016, gautam, Update, SUS, ETMs first-contacted
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Sun Aug 21 16:23:05 2016, gautam, Update, SUS, ETMX suspended
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Mon Aug 22 13:06:11 2016, gautam, Update, SUS, ETMY suspended
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Mon Aug 22 18:04:24 2016, gautam, Update, SUS, ETMY OSEMs inserted
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Tue Aug 23 19:35:38 2016, gautam, Update, SUS, ETMY back in IFO 10x
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Thu Aug 25 21:11:43 2016, gautam, Update, SUS, ETMY back in IFO
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Fri Aug 26 11:35:44 2016, gautam, Update, SUS, ETMY UL sensor problematic
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Fri Aug 26 14:05:38 2016, Steve, Update, SUS, ETMY UL sensor problematic
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Fri Aug 26 14:09:46 2016, ericq, Update, SUS, ETMY UL sensor problematic
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Sun Aug 28 21:40:11 2016, gautam, Update, SUS, ETMY UL sensor problematic
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Mon Aug 29 09:37:05 2016, gautam, Update, SUS, ETMY UL sensor problematic
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Mon Aug 29 14:42:06 2016, gautam, Update, SUS, ETMY Satellite box diagnostics
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Fri Aug 26 17:48:14 2016, gautam, Update, SUS, bounce mode coupling reduction
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Mon Aug 29 21:53:14 2016, Lydia, Update, SUS, ETMY bounce mode coupling
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Tue Aug 30 20:26:36 2016, gautam, Update, SUS, ITMY installed
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Wed Aug 31 18:07:43 2016, Johannes, Update, SUS, ITMY free swinging
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Wed Aug 31 22:09:18 2016, gautam, Update, SUS, Y arm locked to Green
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Thu Sep 1 08:30:24 2016, Steve, Update, SUS, ITMY_UL is sick
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Tue Sep 6 20:30:56 2016, rana, Update, SUS, ITMY_UL is sick
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Tue Sep 13 11:00:59 2016, Lydia, Update, SUS, ETMY UL glitch returned
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Thu Sep 1 19:59:22 2016, Johannes, Update, SUS, IR mode flashes in Y arm
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Fri Sep 2 21:09:08 2016, gautam, Update, SUS, Y arm locked in air
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Tue Sep 6 20:45:14 2016, gautam, Update, SUS, X arm test masses back in chamber
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Thu Sep 8 22:12:36 2016, gautam, Update, SUS, X arm in place, locked to green, IR flashes visible
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Fri Sep 9 17:50:02 2016, gautam, Update, SUS, Heavy doors on BS-PRM, ETMY chambers
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Sat Sep 10 14:26:01 2016, rana, Update, General, PRM SRM alignment
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Mon Sep 12 17:15:22 2016, Johannes, Update, General, PRM SRM alignment
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Thu Sep 1 19:18:14 2016, Johannes, Update, SUS, ITMX and ETMX preemptive table leveling 8x
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Fri Sep 2 21:15:53 2016, gautam, Update, SUS, ITMX and ETMX preemptive table leveling
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Thu Sep 1 15:43:16 2016, rana, Update, SUS, OSEM adjustments
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Mon Sep 5 19:57:24 2016, Osamu, Update, SUS, OSEM adjustments
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Message ID: 12459
Entry time: Thu Sep 1 08:30:24 2016
In reply to: 12457
Reply to this: 12473
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| Author: |
Steve |
| Type: |
Update |
| Category: |
SUS |
| Subject: |
ITMY_UL is sick |
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So if the SRM satellite box is good, than the ITMY sensor UL or vacuum cabeling from sersor to sat amp is bad.
| Quote: |
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Koji tweaked the alignment sliders till we were able to get the Y arm locked to green in a 00 mode, GTRY ~ 0.5 which is the prevent number I have in my head. The green input pointing looks slightly off in yaw, as the spot on the ITM looks a little misaligned - I will fix this tomorrow. But it is encouraging that we can lock to the green, suggests we are not crazily off in alignment.
[Ed by KA: slider values: ETMY (P, Y) = (-3.5459, 0.7050), ITMY (P, Y) = (0.3013, -0.2127)]
While we were locked to the green, ITMY UL coil acted up quite a bit - with a large number of clearly visible excursions. Since the damping was on, this translated to somewhat violent jerking of ITMY (though the green impressively remained locked). We need to fix this. In the interest of diagnosis, I have switched in the SRM satellite box for the ITM one, for overnight observation. It would be good to narrow this down to the electronics. Since SRM is EQ-stopped, I did not plug in any satellite box for SRM. The problem is a difficult one to diagnose, as we can't be sure if the problem is with the LED current driver stage or the PD amplifier stage (or for that matter, the LED/PD themselves), and because the glitches are so intermittent. I will see if any further information can be gleaned in this regard before embarking on some extreme measure like switching out all the 1125 OpAmps or something...
Does anyone know if we have a spare satellite box handy?
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Is the spare sat amp is bad ? |
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