| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13998
|
Thu Jun 21 15:32:05 2018 |
gautam | Update | Electronics | EX AA filter range change | [steve, gautam]
I took this opportunity of EX downtime
to change the supply voltage for the AA unit |
|
|
13999
|
Thu Jun 21 18:25:57 2018 |
gautam | Update | SUS | ETMX coil driver re-installed | Initial tests look promising. Local damping
works and I
even locked the X arm using POX, |
|
|
14000
|
Thu Jun 21 22:13:12 2018 |
gautam | Update | CDS | pianosa upgrade | pianosa |
|
|
14003
|
Fri Jun 22 00:59:43 2018 |
gautam | Update | CDS | pianosa functional, but NO DTT | MEDM, EPICS and dataviewer seem to work,
but diaggui still doesn't work (it doesn't
work on Rossa either, same problem as reported |
|
|
14007
|
Fri Jun 22 15:13:47 2018 |
gautam | Update | CDS | DTT working | Seems like DTT also works now. The trick
seems to be to run |
|
|
14009
|
Fri Jun 22 18:30:21 2018 |
gautam | Update | SUS | ITMY_UL sensor | I think if the magnet fell off, we would
see high DC signal, and not 0 as we do now.
I suspect satellite box or PD readout board/cabling. |
|
|
14012
|
Sun Jun 24 20:02:07 2018 |
gautam | Update | SUS | Some notes about coil driver noise | Summary:
For a series resistance of 4.5
kohm, we are suffering from the noise-gain |
|
|
14019
|
Tue Jun 26 16:28:00 2018 |
gautam | Update | SUS | Coil driver protoboard characterization | I wanted to investigate my coil driver
noise measurement technique under more controlled
circumstances, so I spent yesterday setting |
|
|
14024
|
Wed Jun 27 18:12:04 2018 |
gautam | Update | Electronics | Coil driver dewhitening | Summary:
I've been thinking about what
we need to do to the de-whitening boards |
|
|
14027
|
Wed Jun 27 21:18:00 2018 |
gautam | Update | CDS | Lab maintenance scripts from NODUS---->MEGATRON | I moved the N2 check script and the disk
usage checking script from the (sudo) crontab
of |
|
|
14032
|
Thu Jun 28 16:48:27 2018 |
gautam | Update | SUS | SOS cage towers | For the upcoming vent, we'd like to
rotate the SOS towers to correct for the
large YAW bias voltages used for DC alignment |
|
|
14038
|
Thu Jul 5 10:15:30 2018 |
gautam | Update | SUS | PRM watchdog tripped | PRM watchdog was tripped around 7:15am
PT today morning. I restored it. |
|
|
14055
|
Thu Jul 12 11:13:39 2018 |
gautam | Update | General | OMC revival | Aaron and I are going to do the checkout
of the OMC electronics outside vacuum today.
At some point, we will also want to run a |
|
|
14061
|
Thu Jul 12 23:59:14 2018 |
gautam | Update | General | Vent objectives and prep | Vent
objectives: |
|
|
14063
|
Fri Jul 13 02:52:11 2018 |
gautam | Update | General | Vent objectives and prep | [KA,
GV] |
|
|
14068
|
Fri Jul 13 18:01:13 2018 |
gautam | Update | General | Low power MC | After getting the go ahead from Steve,
I removed the physical beam block on the
PSL table, sent the beam into the IFO, and |
|
|
14075
|
Tue Jul 17 01:07:40 2018 |
gautam | Update | SUS | ETMY EQ stops | For the heater setup on EY table, I EQ-stopped
ETMY. Only |
|
|
14085
|
Thu Jul 19 01:56:25 2018 |
gautam | Summary | VAC | AUX pump shutdown | [koji,
gautam]
Per Steve's instructions, we |
|
|
14094
|
Sat Jul 21 01:06:49 2018 |
gautam | Summary | Thermal Compensation | Y arm locking | I implemented this today. For now, the
LSC output matrix is set to actuate on MC2
for Y arm locking. As expected, the transmission |
|
|
14095
|
Sat Jul 21 01:14:02 2018 |
gautam | Update | OMC | PZT Jena driver board check | [Aaron, gautam]
We did a quick check of this
board today. Main takeaways: |
|
|
14101
|
Tue Jul 24 09:47:51 2018 |
gautam | Update | Cameras | Developing neural networks on simulated video | I was thinking a little more about the
way we are training the network for the current
topology - because the network has no recurrent |
|
|
14104
|
Wed Jul 25 22:46:15 2018 |
gautam | Configuration | Computers | NDS access from outside | After this work, I've been having some
trouble getting data with Python NDS. Eventually,
I figured out that the nds connection request |
|
|
14107
|
Fri Jul 27 02:30:51 2018 |
gautam | Update | General | Glitchy MC | Kevin and I saw some weird IMC / PEM BLRMS
behaviour today - see Attached screenshot.
Not sure what was happening with the IMC, |
|
|
14115
|
Mon Jul 30 11:05:44 2018 |
gautam | Update | SUS | IFO SUS wonky | When I came in this morning:
PMC was unlocked.
Seis
BLRMS were off scale.
ITMX OSEM |
|
|
14117
|
Mon Jul 30 16:11:54 2018 |
gautam | Update | SUS | Trillium interface box is broken | [koji,
steve, gautam] |
|
|
14122
|
Wed Aug 1 19:41:15 2018 |
gautam | Summary | Computers | RTCDS recovery, c1ioo changes | [Gautam Koji]
After this work, we recovered the
nominal RTCDS state. The main points were: |
|
|
14123
|
Wed Aug 1 20:44:57 2018 |
gautam | Summary | Computers | c1omc model (re?)created | The main motivation behind adding a DAC
card in c1ioo was to setup an RTCDS model
for the OMC. Attachment #1 shows the new |
|
|
14125
|
Thu Aug 2 20:47:29 2018 |
gautam | Summary | Electronics | X Green "Mystery" solved | I walked
down to the X end and found that the entire |
|
|
14126
|
Thu Aug 2 20:54:18 2018 |
gautam | Summary | Computers | c1omc model looks stable | Actually, c1lsc had crashed again sometime
last night so I had to reboot everything
this morning. I used the reboot script again, |
|
|
14128
|
Fri Aug 3 14:35:56 2018 |
gautam | Summary | Electronics | EX AUX electronics power restored | Steve and I restored the power to the EX
AUX electronics rack. The power strip on
the lowest shelf of the AUX rack now |
|
|
14129
|
Fri Aug 3 15:53:25 2018 |
gautam | Update | SUS | Low noise bias path idea | Summary:
The idea we are going with to push
the coil driver noise contribution down is |
|
|
14131
|
Fri Aug 3 18:54:58 2018 |
gautam | Update | SUS | Glitchy MC1 | The wall StripTool indicated that the IMC
wasn't too happy when I came in today.
Specifically: |
|
|
14132
|
Fri Aug 3 19:02:11 2018 |
gautam | Update | ASS | X arm ASS recovery | [koji,
gautam]
After I effected the series resistance |
|
|
14133
|
Sun Aug 5 13:28:43 2018 |
gautam | Update | CDS | c1lsc flaky | Since the lab-wide
computer shutdown last Wednesday, all
the realtime models running on c1lsc have |
|
|
14134
|
Sun Aug 5 13:45:00 2018 |
gautam | Update | SUS | ETMX tripped | Independent from the problems the vertex
machine has been having (I think, unless
it's something happening over the shared |
|
|
14135
|
Sun Aug 5 15:43:50 2018 |
gautam | Update | SUS | Another low noise bias path idea | OK, how about this:
Attachment |
|
|
14136
|
Mon Aug 6 00:26:21 2018 |
gautam | Update | CDS | More CDS woes | I spent most of today fighting various
CDS errors.
I rebooted c1lsc around |
|
|
14139
|
Mon Aug 6 14:38:38 2018 |
gautam | Update | CDS | More CDS woes | Stability was short-lived it seems. When
I came in this morning, all models on c1lsc
were dead already, and now c1sus is also |
|
|
14140
|
Mon Aug 6 19:49:09 2018 |
gautam | Update | CDS | More CDS woes | I've left
the c1lsc frontend shutdown for now, |
|
|
14142
|
Tue Aug 7 11:30:46 2018 |
gautam | Update | CDS | More CDS woes | Overnight, all models on c1sus and c1ioo
seem to have had no stability issues, supporting
the hypothesis that timing issues stem from |
|
|
14143
|
Tue Aug 7 22:28:23 2018 |
gautam | Update | CDS | More CDS woes | I am starting the c1x04 model (IOP) on
c1lsc to see how it behaves overnight.
Well, there was apparently an immediate |
|
|
14146
|
Wed Aug 8 23:03:42 2018 |
gautam | Update | CDS | c1lsc model started | As part of this slow but systematic debugging,
I am turning on the c1lsc model overnight
to see if the model crashes return. |
|
|
14147
|
Wed Aug 8 23:06:59 2018 |
gautam | Update | SUS | Another low noise bias path idea | Today while Rich Abbott was here, Koji
and I had a brief discussion with him about
the HV amplifier idea for the coil driver |
|
|
14148
|
Thu Aug 9 02:12:13 2018 |
gautam | Update | COC | South East or West? | Summary:
For operating the SRC in the "Signal-Recycled"
tuning, the SRC macroscopic length needs |
|
|
14149
|
Thu Aug 9 12:31:13 2018 |
gautam | Update | CDS | CDS status update | The model seems to have run without issues
overnight. Not completely related, but the
MC1 shadow sensor signals also don't |
|
|
14150
|
Thu Aug 9 12:40:14 2018 |
gautam | Update | SUS | ETMX trip follow-up | A brief follow-up on this since we discussed
this at the meeting yesterday: the attached
DV screenshot shows the full 2k data for |
|
|
14151
|
Thu Aug 9 22:50:13 2018 |
gautam | Update | CDS | AlignSoft script modified | After this
work of increasing the series resistance
on ETMX, there have been numerous occassions |
|
|
14152
|
Fri Aug 10 01:10:56 2018 |
gautam | Update | LSC | Some vertex locking restored | For
the first time after the whirlwind vent, |
|
|
14154
|
Fri Aug 10 16:43:50 2018 |
gautam | Configuration | Upgrade | Parts list for BHD | Can we use the leakage
beam from MMT2 on the OMC table as the
LO beam? I can't find the spec for this |
|
|
14157
|
Mon Aug 13 11:44:32 2018 |
gautam | Update | Computer Scripts / Programs | Patch updates on nodus | Larry W said that some security issues
were flagged on nodus. So I ran
|
|