| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13211
|
Tue Aug 15 16:32:42 2017 |
Jamie, Gautum | Update | CDS | GPS receiver apparently set to correct mode as "UTC" |
|
|
|
13210
|
Tue Aug 15 13:32:38 2017 |
Kira | Update | PEM | temperature sensor | Tested to make sure that even when only
the AD586 was heated that there was no change
in the reading. I did so by placing the AD586 |
|
|
13209
|
Tue Aug 15 11:50:21 2017 |
Kira | Summary | PEM | temp sensor packaging/mount | For the final packaging/mounting of the
sensor to the seismometer, I have thought
of two options. |
|
|
13208
|
Tue Aug 15 08:22:16 2017 |
Steve | Update | General | projector light bulb replaced | BL-FS300C-PH-LE was
replaced after 2,904 hrs It did
not explode this time. The 4 monts |
|
|
13207
|
Mon Aug 14 20:12:09 2017 |
Jamie, Gautum | Update | CDS | Weird problem with GPS receiver | Today we saw a weird issue with the GPS
receiver (EndRun Technologies Tempus LX).
GPS timing on fb1 (which is handled via IRIG-B |
|
|
13206
|
Mon Aug 14 20:01:38 2017 |
gautam | Update | SUS | Glitches stay on MC1 | I don't think we can say for sure. I
was just talking to EricQ about this, he
said the glitches were often seen when changing |
|
|
13205
|
Mon Aug 14 19:41:46 2017 |
Jamie | Update | CDS | front-end/DAQ network down for kernel upgrade, and timing errors | I'm upgrading the linux kernel for
all the front ends to one that is supposedly
more stable and won't freeze when we |
|
|
13204
|
Mon Aug 14 16:24:09 2017 |
gautam | Update | ALS | Fiber ALS | Today, I borrowed the fiber microscope
from Johannes and took a look at the fibers
coupled to the PDs. The PD labelled " |
|
|
13203
|
Mon Aug 14 12:52:33 2017 |
Kira | Update | PEM | temperature sensor | I didn't realize that the LT1012 needed
an additional input to function. I added
in +15V and -15V to pins 7 and 4, respectively and |
|
|
13202
|
Mon Aug 14 09:49:18 2017 |
Kira | Update | PEM | temperature sensor | Decided to try adding in an OP amp just
to see if it would work. Added LT1012
and a 100k resistor to the circuit (I originally |
|
|
13201
|
Sun Aug 13 01:35:09 2017 |
Koji | Update | SUS | Glitches stay on MC1 | We used to have similar suspension excursion
at ETMX. This was the motivation to replace
the stand-offs from Al ones to ruby ones. |
|
|
13200
|
Sat Aug 12 22:35:22 2017 |
rana | Update | SUS | Glitches stay on MC1 | To add to Gautam's entry: we swapped
the cables at the coil driver side (these
are the ones that go from coil driver to |
|
|
13199
|
Sat Aug 12 14:09:36 2017 |
gautam | Update | SUS | Glitches stay on MC1 | Even
in the switched state, the glitches stayed
on MC1.
The coil |
|
|
13198
|
Fri Aug 11 19:34:49 2017 |
Jamie | Update | CDS | CDS final bits status update | So it appears we now have full frames and
second, minute, and minute_raw trends.
We are still not able to raise |
|
|
13197
|
Fri Aug 11 18:53:35 2017 |
gautam | Update | CDS | Slow EPICS channels -> Frames re-enabled |
|
|
|
13196
|
Fri Aug 11 17:36:47 2017 |
gautam | Update | SUS | MC1 <--> MC3 | About 30mins ago, I saw another glitch
on MC1 - this
happened while the Watchdog was shutdown. |
|
|
13195
|
Fri Aug 11 12:32:46 2017 |
gautam | Update | SUS | MC1 glitches debugging | Attachment #1: Free swinging
sensor spectra. I havent done any peak fitting
but the locations of the resonances seem |
|
|
13194
|
Fri Aug 11 12:27:25 2017 |
Kira | Update | PEM | temperature sensor | Used AD592CNZ and AD586 (5V output) to
create a circuit that works and is responsive
to temperature changes. At room temp, using |
|
|
13193
|
Fri Aug 11 11:56:02 2017 |
rana | Update | PEM | temperature sensor | Might as well order several of a few different
varieties today. Its good to have some extra
in stock; we don't always want to have |
|
|
13192
|
Fri Aug 11 11:14:24 2017 |
gautam | Update | CDS | Slow EPICS channels -> Frames re-enabled | I commented
out the line pertaining to C0EDCU again,
now full frames are being written |
|
|
13191
|
Fri Aug 11 10:48:39 2017 |
Kira | Update | PEM | temperature sensor | Quick update: we actually have AD587KRZ
and AD592, so we could start by using that
and seeing how it works. |
|
|
13190
|
Fri Aug 11 10:27:49 2017 |
Kira | Update | PEM | temperature sensor | Since there seems to be little difference
between AD590 and AD592, I guess we could
just go with the AD590. The temperature noise |
|
|
13189
|
Fri Aug 11 00:10:03 2017 |
gautam | Update | CDS | Slow EPICS channels -> Frames re-enabled | Seems
like something has failed after I did this |
|
|
13188
|
Thu Aug 10 21:22:06 2017 |
rana | Summary | PEM | temperature sensor |
Should we use the AD590 or the
AD592? They're sort of the same, but
have slightly different packages and specs.
Given |
|
|
13187
|
Thu Aug 10 21:01:43 2017 |
gautam | Update | SUS | MC1 glitches debugging | I have squished cables in all the places
I can think of - but MC1 has been glitching
regularly today. Before starting to pull |
|
|
13186
|
Thu Aug 10 15:45:34 2017 |
Steve | Update | VAC | accidental vent to 17 Torr | Finally we got the cold cathode gauge working.
IFO pressure 7e-6 Torr-it, vacuum normal
valve configuration with all 4 ion pump gate |
|
|
13185
|
Thu Aug 10 14:25:52 2017 |
gautam | Update | CDS | Slow EPICS channels -> Frames re-enabled | I went into /opt/rtcds/caltech/c1/target/daqd, |
|
|
13184
|
Thu Aug 10 14:14:17 2017 |
Kira | Update | PEM | previously built temp sensor | I decided to see what was inside the sensor
that had been previously made. According
to elog 1102, the temperature sensor is LM34, |
|
|
13183
|
Thu Aug 10 14:13:23 2017 |
Kira | Summary | PEM | temperature sensor | Goal is to build a temperature sensor accurate
to 1 mK. Schematic is shown below. This does
not take into account the DC gain that occurs. |
|
|
13182
|
Thu Aug 10 09:31:57 2017 |
Steve | Update | SUS | ITMX sensor voltage | There must be some bad connection
|
|
|
13181
|
Thu Aug 10 09:10:55 2017 |
steve | Update | General | dataviewer is recovering | It can look back 7 days trends now. There
is still no vacuum channels. I can bring
back the channels through the restore directory, |
|
|
13180
|
Wed Aug 9 19:21:18 2017 |
gautam | Update | ALS | ALS recovery | Summary:
Between frequent MC1 excursions,
I worked on ALS recovery today. Attachment |
|
|
13179
|
Wed Aug 9 16:34:46 2017 |
rana | Update | VAC | Vacuum Document recovered | Steve and I found the previous draft of
the 40m Vacuum Document. Someone in 2015
had browsed into the Docs history and then |
|
|
13178
|
Wed Aug 9 15:15:47 2017 |
gautam | Update | SUS | MC1 glitches return | Happened again just now, although the characteristics
of the glitch are very different from the
previous post, its less abrupt. Only actuation |
|
|
13177
|
Wed Aug 9 12:35:47 2017 |
gautam | Update | ALS | Fiber ALS | Last week, we were talking about reviving
the Fiber ALS box. Right now, it's not
in great shape. Some changes to be made: |
|
|
13176
|
Wed Aug 9 12:05:57 2017 |
rana | Update | Electronics | data archiving | This kind of data fitting and analysis
is really useful. We should figure out a
way to archive it. Perhaps the data files |
|
|
13175
|
Wed Aug 9 11:59:51 2017 |
Steve | Update | VAC | unintended pump down at vacuum normal | pd80b has reached Vac Normal. IFO pressure
0.5 mTorr
We need our vauum channels back |
|
|
13174
|
Wed Aug 9 11:33:49 2017 |
gautam | Update | Electronics | MC2 de-whitening | Summary:
The analog de-whitening filters
for MC2 are different from those on the other |
|
|
13173
|
Tue Aug 8 20:48:06 2017 |
gautam | Update | SUS | ITMX stuck | Somewhere between CDS model restarts |
|
|
13172
|
Tue Aug 8 17:44:11 2017 |
Steve | Update | VAC | unintended pump down | Pumpdown stopped for over night at
~ 1 Torr
The roughing line disconnected. |
|
|
13171
|
Tue Aug 8 17:04:26 2017 |
Steve | Update | VAC | unintended pump down | IFO pressure 2 Torr, PSL
shutter closed. I'm pumping down
with 2 roughing pumps with ion pump gate |
|
|
13170
|
Mon Aug 7 22:50:57 2017 |
Koji | Update | General | New wifi router for the GC network installed | I have replaced the old 11n wifi router
(CISCO / Linksys) for the GC network with
a new one with 11ac technology. |
|
|
13169
|
Mon Aug 7 16:00:41 2017 |
rana | Update | General | Bilinear noise coupling | These are not the angular test
parameters that we're looking for:
recall that what we want |
|
|
13168
|
Sat Aug 5 11:04:07 2017 |
gautam | Update | SUS | MC1 glitches return | See Attachment #1, which is full (2048Hz)
data for a 3 minute stretch around when I
saw the MC1 glitch. At the time of the glitch, |
|
|
13167
|
Fri Aug 4 18:25:15 2017 |
gautam | Update | General | Bilinear noise coupling | [Nikhil, gautam]
|
|
|
13166
|
Fri Aug 4 09:07:28 2017 |
rana | Update | CDS | CDS system essentially NOT fully recovered | Tried getting |
|
|
13165
|
Thu Aug 3 20:15:11 2017 |
Jamie | Update | CDS | dataviewer can not raise test points | For some reason dataviewer is not able
to raise test points with the new daqd setup,
even though dtt can. If you raise a |
|
|
13164
|
Thu Aug 3 19:46:27 2017 |
Jamie | Update | CDS | new daqd restart procedure | This is the daqd restart procedure:
$ ssh |
|
|
13163
|
Thu Aug 3 11:11:29 2017 |
gautam | Update | CDS | NDS2 server restarted, /frames mounted on nodus | I added nodus' eth0 IP (192.168.113.200)
to the list of allowed nfs clients in /etc/exportfs
on fb1, and then ran sudo mount -a on nodus. |
|
|
13162
|
Thu Aug 3 10:51:32 2017 |
rana | Update | CDS | NDS2 server restarted, /frames mounted on megatron | same issue on NODUS; I edited the /etc/fstab
and tried mount -a, but it gives this error:
controls@nodus|~ 1> sudo |
|