| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13015
|
Thu May 25 19:27:29 2017 |
gautam | Update | General | Coil driver board noises | [Koji, Gautam]
Summary:
Attachment
#1 shows the measured/modeled noise |
|
|
13017
|
Mon May 29 16:47:38 2017 |
gautam | Update | General | Coil driver boards reinstalled | Yesterday,
I reinstalled the de-whitening boards + coil
driver boards into their respective Eurocrate |
|
|
13019
|
Tue May 30 16:02:59 2017 |
gautam | Update | General | Coil driver boards reinstalled | I think the reason I am unable to engage
the de-whitening is that the OL loop is injecting
a ton of control noise - see Attachment #1. |
|
|
13026
|
Thu Jun 1 00:10:15 2017 |
gautam | Update | General | Coil driver boards reinstalled | [Koji, Gautam]
We tried to debug the mysterious
sudden failure of ASS - here is a summary |
|
|
13028
|
Thu Jun 1 15:37:01 2017 |
gautam | Update | CDS | slow machine bootfest | Steve alerted me that the IMC wouldn't
lock. Reboots for |
|
|
13033
|
Fri Jun 2 01:22:50 2017 |
gautam | Update | ASS | ASS restoration work | I started by checking if shaking an optic
in pitch really moves it in pitch - i.e.
how much PIT to YAW coupling is there. The |
|
|
13034
|
Fri Jun 2 12:32:16 2017 |
gautam | Update | General | Power glitch | Looks like there was a power glitch at
around 10am today.
All frontends, FB, Megatron, Optimus |
|
|
13035
|
Fri Jun 2 16:02:34 2017 |
gautam | Update | General | Power glitch | Today's
recovery seems to be a lot more complicated
than usual.
|
|
|
13036
|
Fri Jun 2 22:01:52 2017 |
gautam | Update | General | Power glitch - recovery | [Koji, Rana, Gautam]
Attachment #1 - CDS
status at the end of todays efforts. There |
|
|
13038
|
Sun Jun 4 15:59:50 2017 |
gautam | Update | General | Power glitch - recovery | I
think the CDS status is back to normal.
Bit |
|
|
13048
|
Wed Jun 7 14:11:49 2017 |
gautam | Update | ASS | Y-arm coil driver electronics investigation | Rana suggested taking a look at the Y-arm
test mass actuator TFs (measured by driving
the coils one at a time, with only local |
|
|
13051
|
Wed Jun 7 17:45:11 2017 |
gautam | Update | ASS | Y-arm coil driver electronics investigation | I repeated the test of driving C1:SUS-<Optic>_<coil>_EXC
individually and measuring |
|
|
13052
|
Thu Jun 8 02:11:28 2017 |
gautam | Update | ASS | Y-arm coil driver electronics investigation |
p.p1
{margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px
'Helvetica Neue'; -webkit-text-stroke: #000000}
p.p3 |
|
|
13055
|
Fri Jun 9 15:31:45 2017 |
gautam | Update | IMC | IMC wonkiness | I've been noticing
some weird behaviour with the IMC over the |
|
|
13058
|
Fri Jun 9 19:18:10 2017 |
gautam | Update | IMC | IMC wonkiness | It happened again. MC2 UL seems to have
gotten the biggest glitch. It's a rather
small jump in the signal level compared to |
|
|
13059
|
Mon Jun 12 10:34:10 2017 |
gautam | Update | CDS | slow machine bootfest | Reboots for
c1susaux, c1iscaux, c1auxex |
|
|
13060
|
Mon Jun 12 17:42:39 2017 |
gautam | Update | ASS | ETMY Oplev Pentek board pulled out | As part of my Oplev servo investigations,
I have pulled out the Pentek Generic Whitening
board (D020432) from the Y-end electronics |
|
|
13063
|
Wed Jun 14 18:15:06 2017 |
gautam | Update | ASS | ETMY Oplev restored | I
replaced the Pentek Generic Whitening Board
and the Optical Lever PD Interface Board |
|
|
13064
|
Thu Jun 15 01:56:50 2017 |
gautam | Update | ASS | ETMY Oplev restored | Summary:
I tried playing around with |
|
|
13069
|
Fri Jun 16 13:53:11 2017 |
gautam | Update | CDS | slow machine bootfest | Reboots for
c1psl, c1iool0, c1iscaux |
|
|
13079
|
Sun Jun 25 22:30:57 2017 |
gautam | Update | General | c1iscex timing troubles | I saw that the CDS overview screen indicated
problems with c1iscex (also ETMX was erratic).
I took a closer look and thought it might |
|
|
13082
|
Tue Jun 27 16:11:28 2017 |
gautam | Update | Electronics | Coil whitening | I got back to trying to engage the coil
driver whitening today, the idea being to
try and lock the DRMI in a lower noise configuration |
|
|
13085
|
Wed Jun 28 20:15:46 2017 |
gautam | Update | General | c1iscex timing troubles | [Koji, gautam]
Here
is a summary of what we did today to fix |
|
|
13088
|
Fri Jun 30 02:13:23 2017 |
gautam | Update | General | DRMI locking attempt | Summary:
I attempted to re-lock the DRMI
and try and realize some of the noise improvements |
|
|
13090
|
Fri Jun 30 11:50:17 2017 |
gautam | Update | General | DRMI locking attempt | Seems like the problem is actually with
ITMX
- the attached DV plots are for ITMX with |
|
|
13093
|
Fri Jun 30 22:28:27 2017 |
gautam | Update | General | DRMI re-locked | Summary:
Reverted
to old settings, tried to reproduce DRMI
lock with settings as close to those used |
|
|
13096
|
Wed Jul 5 16:09:34 2017 |
gautam | Update | CDS | slow machine bootfest | Reboots for
c1susaux, c1iscaux |
|
|
13097
|
Wed Jul 5 19:10:36 2017 |
gautam | Update | General | NB code checkout - updated | I've been making NBs on my laptop,
thought I would get the copy under version
control up-to-date since I've been negligent |
|
|
13101
|
Sat Jul 8 17:09:50 2017 |
gautam | Update | General | ETMY TRANS QPD anomaly | About 2 weeks ago, I noticed some odd behaviour
of the LSC TRY data stream. Its DC value
seems to be drifting ~10x more than TRX. |
|
|
13103
|
Mon Jul 10 09:49:02 2017 |
gautam | Update | General | All FEs down | Attachment #1:
State of CDS overview screen as of 9.30AM
today morning when I came in. |
|
|
13104
|
Mon Jul 10 11:20:20 2017 |
gautam | Update | General | All FEs down | I am unable to get FB to reboot to a working
state. A hard reboot throws it into a loop
of "Media Test Failure. Check Cable". |
|
|
13106
|
Mon Jul 10 17:46:26 2017 |
gautam | Update | General | All FEs down | A bit more digging on the diagnostics page
of the RAID array reveals that the two power
supplies actually failed on |
|
|
13107
|
Mon Jul 10 19:15:21 2017 |
gautam | Update | General | All FEs down | The
Jetstor RAID array is back in its nominal |
|
|
13111
|
Tue Jul 11 15:03:55 2017 |
gautam | Update | General | All FEs down | Jamie suggested verifying that the problem
is indeed with the disk and not with the
controller, so I tried switching the original |
|
|
13113
|
Wed Jul 12 10:21:07 2017 |
gautam | Update | General | All FEs down | Seems like the connector on this particular
disk is of the SAS
variety (and not SATA). I'll ask |
|
|
13114
|
Wed Jul 12 14:46:09 2017 |
gautam | Update | General | All FEs down | I couldn't find an external docking
setup for this SAS disk, seems
like we need an actual controller in order |
|
|
13117
|
Fri Jul 14 17:47:03 2017 |
gautam | Update | General | Disks from LLO have arrived | [jamie, gautam]
Today
morning, the disks from LLO arrived. Jamie
and I have been trying to get things back |
|
|
13120
|
Sat Jul 15 16:19:00 2017 |
gautam | Update | Cameras | Makeshift PyPylon | Some days ago, I stumbled upon
this github page, by a grad student at
KIT who developed this code as he was |
|
|
13124
|
Wed Jul 19 00:59:47 2017 |
gautam | Update | General | FINESSE model of DRMI (no arms) | Summary:
I've
been working on improving the 40m FINESSE
model I set up sometime last year (where |
|
|
13135
|
Mon Jul 24 10:45:23 2017 |
gautam | Update | CDS | c1iscex models died | This morning, all the c1iscex
models were dead. Attachment #1 |
|
|
13137
|
Mon Jul 24 12:00:21 2017 |
gautam | Update | PSL | PSL NPRO mysteriously shut off | Summary:
At around 10:30AM |
|
|
13139
|
Mon Jul 24 19:57:54 2017 |
gautam | Update | CDS | IMC locked, Autolocker re-enabled | Now that all the front end models are running,
I re-aligned the IMC, locked it manually,
and then tweaked the alignment some more. |
|
|
13141
|
Tue Jul 25 02:03:59 2017 |
gautam | Update | Optical Levers | Optical lever tuning thoughts | Summary:
Currently, I am unable to engage
the coil-dewhitening filters without destroying |
|
|
13146
|
Thu Jul 27 22:42:24 2017 |
gautam | Update | SUS | Seismic noise, DAC noise, and Coil Driver electronics noise | Summary:
|
|
|
13147
|
Fri Jul 28 15:36:32 2017 |
gautam | Update | Optical Levers | Optical lever tuning thoughts | Attachment #1 - Measured
error signal spectrum |
|
|
13148
|
Fri Jul 28 16:47:16 2017 |
gautam | Update | General | PSL StripTool flatlined | About 3.5 hours ago, all the PSL wall StripTool
traces "flatlined", as happens
when we had the EPICS freezes in the past |
|
|
13150
|
Sat Jul 29 14:05:19 2017 |
gautam | Update | General | PSL StripTool flatlined | The PMC was unlocked when I came in ~10mins
ago. The wall StripTool traces suggest it
has been this way for > 8hours. I was |
|
|
13152
|
Mon Jul 31 15:13:24 2017 |
gautam | Update | CDS | FB ---> FB1 | [jamie, gautam]
In order to test the new daqd config
that Jamie has been working on, we felt it |
|
|
13156
|
Tue Aug 1 16:05:01 2017 |
gautam | Update | Optical Levers | Optical lever tuning - cost function construction | Summary:
I've been trying |
|
|
13160
|
Wed Aug 2 15:04:15 2017 |
gautam | Configuration | Computers | control room workstation power distribution | The 4 control room workstation CPUs (Rossa,
Pianosa, Donatella and Allegra) are now connected
to the UPS. |
|