| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
12657
|
Fri Dec 2 11:56:42 2016 |
gautam | Update | LSC | MC1 LEMO jiggled | I noticed 2 periods of frequent IMC locklosses
on the StripTool trace, and so checked the
MC1 PD readout channels to see if there were |
|
|
12659
|
Fri Dec 2 16:21:12 2016 |
gautam | Update | General | repaired projector, new mixer arrived and installed | The most recent power outage took out our
projector and mixer. The projector was sent
for repair while we ordered a new mixer. |
|
|
12660
|
Fri Dec 2 16:40:29 2016 |
gautam | Update | IMC | 24V fuse pulled out | I've pulled out the 24V fuse block
which supplies power to the AOM RF driver.
The way things are set up on the PSL table, |
|
|
12661
|
Fri Dec 2 18:02:37 2016 |
Koji | Update | IOO | IMC WFS Demod board measurement & analysis | ELOG of the Wednesday work.
It turned out that the IMC WFS
demod boards have the PCB board that has |
|
|
12662
|
Sat Dec 3 13:27:35 2016 |
Koji | Update | IOO | IMC WFS Demod board measurement & analysis | ELOG of the work on Thursday
Gautam suggested looking at the
preamplifier noise by shorting the input |
|
|
12663
|
Mon Dec 5 01:58:16 2016 |
gautam | Update | IMC | IMC ringdowns | Over the weekend, I worked a bit on getting
these ringdowns going. I will post a more
detailed elog tomorrow but here is a quick |
|
|
12664
|
Mon Dec 5 15:05:37 2016 |
gautam | Update | LSC | MC1 glitches are back | For no apparent reason, the MC1 glitches
are back. Nothing has been touched near the
PD whitening chassis today, and the trend |
|
|
12665
|
Mon Dec 5 15:55:25 2016 |
gautam | Update | IMC | IMC ringdowns | As promised, here is the more detailed
elog.
Part |
7x |
|
12666
|
Mon Dec 5 19:29:52 2016 |
gautam | Update | IMC | IMC ringdowns | The MC1 suspension troubles vanished as
they came - but the IMC was remaining locked
stably so I decided to do another round of |
|
|
12667
|
Tue Dec 6 00:43:41 2016 |
gautam | Update | IMC | more IMC ringdowns | In an effor to see if I could narrow down
the cause of the 100kHz ringing seen in the
reflected PD signal, I tried a few things. |
|
|
12668
|
Tue Dec 6 13:37:02 2016 |
Koji | Update | IOO | IMC WFS Demod board measurement & analysis | I have implemented the modification to
the demod boards (Attachment 1).
Now, I am looking at the noise in |
|
|
12669
|
Tue Dec 6 16:47:40 2016 |
Koji | Update | IOO | IMC WFS whitening filter investigation | The
whitening board saids it is Rev B, but the
actual component values are more like Rev. |
|
|
12670
|
Tue Dec 6 17:54:08 2016 |
Koji | Update | IOO | IMC WFS whitening filter investigation | The
input resistor 909Ohm of AD602 was shorted.
I've confirmed that the gain (= attenuation |
|
|
12671
|
Tue Dec 6 22:41:49 2016 |
Koji | Update | IOO | IMC WFS whitening filter investigation | I have implemented the same modification
(shorting the input resistor of AD602) to
the two whitening boards. |
|
|
12672
|
Wed Dec 7 11:52:48 2016 |
ericq | Update | IMC | Partial IMC ringdowns | The transients are likely due to doppler
interference due to the input laser frequency
sloshing due to errant control signals after |
|
|
12673
|
Thu Dec 8 07:56:05 2016 |
Steve | Update | PEM | EQ6.5m Northen CA | No damage. ITMY is glitching, so it has
not been damped.
|
|
|
12674
|
Thu Dec 8 10:13:43 2016 |
Steve | Update | LSC | glitching ITMY_UL has a history |
|
|
|
12675
|
Thu Dec 8 19:01:21 2016 |
rana | Update | IMC | Partial IMC ringdowns | Mach Zucker on howto do Ringdowns: https://dcc.ligo.org/LIGO-T900007 |
|
|
12676
|
Tue Dec 13 17:26:42 2016 |
Koji | Update | IOO | IMC WFS whitening filter investigation | Rana pointed out that this modification
(removal of 900Ohm) leave the input impedance
as low as 100Ohm. |
|
|
12677
|
Wed Dec 14 19:16:57 2016 |
Lydia | Update | CDS | Acromag Binary I/O testing | I looked into converting the QPD whitening
switches for the X end to Acromag.
To test this out and be |
|
|
12678
|
Thu Dec 15 03:46:19 2016 |
rana | Update | IOO | IMC WFS whitening filter investigation | https://dcc.ligo.org/LIGO-D1400414
As it turns out, its not so old
as I thought. Jenne and I reworked these |
|
|
12681
|
Thu Dec 22 09:37:20 2016 |
Steve | Update | VAC | RGA scan at day 63 | Valve configuration: vacuum normal
RGA head temp: 43.5 C
Vac envelope temp: 23 C |
|
|
12687
|
Thu Dec 29 10:24:56 2016 |
Steve | Update | PEM | EQ5.7mHawthorn NV | Sus damping restored.
|
|
|
12691
|
Thu Dec 29 21:48:32 2016 |
rana | Update | IOO | MC AutoLocker hung because c1iool0 asleep again | MC unlocked, Autolocker waiting for c1iool0
EPICS channels to respond. c1iool0 was responding
to ping, but not to telnet. Keyed the crate |
|
|
12692
|
Fri Dec 30 10:27:46 2016 |
rana | Update | DetChar | summary pages dead again | Dead again.
No outputs for the past month. We really
need a cron job to check this out |
|
|
12693
|
Thu Jan 5 21:43:16 2017 |
rana | Update | DetChar | summary pages dead again | Max tells us that soem conf files were
bad and that he did something and now some
pages are being made. But the PEM and MEDM |
|
|
12695
|
Sun Jan 8 12:47:06 2017 |
rana | Update | General | Optical Layout in DCC | Manasa pointed me to the CAD drawings in
the 40m SVN and I've now uploaded them
to the 40m |
|
|
12696
|
Mon Jan 9 09:18:47 2017 |
Steve | Update | PEM | power glitch | There was a power glitch last night around
1:15am
The vacuum was not effected. |
|
|
12697
|
Mon Jan 9 16:12:30 2017 |
Steve | Update | General | Optical Layout in DCC | Caltech Facilities promissed to email the
40m facility drawings in Cad format.
I organized the old of optical |
|
|
12698
|
Tue Jan 10 14:24:09 2017 |
Steve | Update | VAC | RGA scan at day 82 | Valve configuration: vacuum normal
Vacuum envelope: 23C
Rga head: 44C |
|
|
12699
|
Tue Jan 10 16:20:11 2017 |
Steve | Update | CDS | power glitch......Raid is rebuilding | Jamie started the fm40m Raid rebuilding.
It has been beeping since the power outage.
Summary pages have no reading since |
|
|
12700
|
Tue Jan 10 21:47:00 2017 |
rana | Update | CDS | power glitch | Does "done" mean they are OK
or they are somehow damaged? Do
you mean the workstations or the front end |
|
|
12701
|
Tue Jan 10 22:55:43 2017 |
gautam | Update | CDS | power glitch - recovery steps | Here
is a link to an elog with the steps I had
to follow the last time there was a similar |
|
|
12702
|
Wed Jan 11 16:35:03 2017 |
gautam | Update | CDS | power glitch - recovery progress | [lydia, ericq, gautam]
We set about following the instructions
linked in the previous elog. A few notes/remarks: |
|
|
12703
|
Wed Jan 11 19:20:23 2017 |
Max Isi | Update | Summary Pages | December outage | The summary pages were not successfully
generated for a long period of time at the
end of 2016 due to syntax errors in the PEM |
|
|
12704
|
Thu Jan 12 02:45:53 2017 |
Johannes | Update | General | Next armloss steps | As stated in elog
12618, using an oscilloscope to average
the reflected powers and thus circumventing |
|
|
12708
|
Thu Jan 12 17:31:51 2017 |
gautam | Update | CDS | DC errors | The IFO is more or less back to an operational
state. Some details:
The IMC mirror excess motion |
|
|
12709
|
Thu Jan 12 23:22:34 2017 |
rana | Update | Summary Pages | December outage | Pages still not working: PEM and MEDM blank.
Committed existing MEDM
grabbing scripts to SVN. Ran the cron job |
|
|
12710
|
Fri Jan 13 08:54:32 2017 |
Johannes | Update | General | DC PD installed | I installed a DC PD (Thorlabs PDA 520)
in the beam path to AS55. I placed a 2" |
|
|
12711
|
Fri Jan 13 10:53:03 2017 |
Steve | Update | PEM | doors are fixed | Control room to outside door was
realigned.
|
|
|
12712
|
Fri Jan 13 14:18:28 2017 |
Steve | Update | PEM | air condition fixed | The old control room AC has been
stick in heating mode for
about 2 months. It's thermostate |
|
|
12713
|
Fri Jan 13 14:33:00 2017 |
MAX (not Rana) | Update | Summary Pages | December outage | PEM config file was also lacking a section
named "summary", which is necessary
for all parent tabs; this has now been solved. |
|
|
12715
|
Fri Jan 13 21:41:23 2017 |
Koji | Update | CDS | DC errors | I think I fixed the DC error issue
1. I added the leap second
(leapsecond ?) entry for 2016/12/31, 23:60:00 |
|
|
12716
|
Fri Jan 13 23:39:46 2017 |
gautam | Update | General | ETMX suspension electronics problems? | [Koji,gautam]
After Koji's leap second fix,
we were playing around with the X arm locking. |
|
|
12718
|
Sat Jan 14 12:12:03 2017 |
rana | Update | DAQ | minute trends missing | Did we turn off minute trend writing in
one of the recent FrameBuilder debug sessions?
Seems we only have second trends in 2016. |
|
|
12719
|
Sat Jan 14 12:36:57 2017 |
ericq | Update | DAQ | minute trends missing | Yes, writing minute trends causes hourly
FB crashes in the current state of things.
The "raw" minute trending is turned |
|
|
12722
|
Mon Jan 16 18:54:01 2017 |
rana | Update | SUS | BS: whitening re-engaged | Found that the BS whitening was off. Gautam
says that "it has always been that way"
and "there's nothing in the elog |
|
|
12725
|
Mon Jan 16 23:25:07 2017 |
gautam | Update | SUS | MC1 SUS electronics investigation | [rana,gautam]
Summary:
|
|
|
12726
|
Tue Jan 17 20:39:30 2017 |
rana | Update | Computer Scripts / Programs | nodus web apache simlinks too soft | I tried to follow these instructions today
to make the Simulink Webview accessible:
controls@nodus|public_html |
|
|
12727
|
Tue Jan 17 20:47:23 2017 |
rana | Update | CDS | Simulink Webview updated | Seems like this stops working every ~2
years. Its been busted since early 2016 according
to cron, so I fixed up the paths and restored |
|