| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13229
|
Fri Aug 18 23:59:53 2017 |
gautam | Update | ALS | X Arm ALS lock | [ericq, gautam]
I was just getting the
IFO aligned, and single arm lock going, when |
|
|
13228
|
Fri Aug 18 21:58:35 2017 |
gautam | Update | General | SUS model ASC input weirdness | I spent some time today trying to debug
this issue.
Jamie |
|
|
13227
|
Thu Aug 17 22:54:49 2017 |
ericq | Update | Computers | Trying to access JetStor RAID files | The JetStor RAID unit that we had been
using for frame writing before the fb meltdown
has some archived frames from DRFPMI locks |
|
|
13226
|
Thu Aug 17 17:33:01 2017 |
gautam | Update | SUS | MC1 <--> MC3 switched back | that's why the Autolocker clears the
outputs; we don't want to be holding
the offsets from the last ms of lock when |
|
|
13225
|
Thu Aug 17 11:17:49 2017 |
gautam | Update | SUS | MC1 <--> MC3 switched back | Seems like this modification didn't
really work. There were several large MC1
glitches, and one of them misaligned MC1 |
|
|
13224
|
Thu Aug 17 10:41:58 2017 |
Kira | Update | PEM | temp sensor PCB | Got it to work. One of the connections
was faulty. I decided to check the temperature
measured against a thermometer. The sensor |
|
|
13223
|
Thu Aug 17 08:42:27 2017 |
Steve | Update | PSL | PSL HEPA | The PSL HEPA was running noisy at 100V
The bearing is wearing out. I turned it down
to 30V It is quiet there. |
|
|
13222
|
Wed Aug 16 20:24:23 2017 |
gautam | Update | ALS | Fiber ALS | Today, with Johannes' help, I cleaned
the fiber tips of the photodiodes. The effect
of the cleaning was dramatic - see Attachments |
|
|
13221
|
Wed Aug 16 20:01:03 2017 |
gautam | Update | General | SUS model ASC input weirdness | I'm not sure if this has something
to do with the model restarts / new RCG,
but while I was re-enabling the MC watchdogs, |
|
|
13220
|
Wed Aug 16 19:50:17 2017 |
gautam | Update | SUS | MC1 <--> MC3 switched back | Now that all the CDS overview lights are
green, I decided to switch back the coil
driver outputs to their original state so |
|
|
13219
|
Wed Aug 16 18:50:58 2017 |
Jamie | Update | CDS | front-end/DAQ network down for kernel upgrade, and timing errors |
|
|
|
13218
|
Wed Aug 16 18:06:01 2017 |
Koji | Update | CDS | front-end/DAQ network down for kernel upgrade, and timing errors | We also need to copy chiara's root.
What is the best way to get the full image
of the root FS? |
|
|
13217
|
Wed Aug 16 18:01:28 2017 |
Jamie | Update | CDS | front-end/DAQ network down for kernel upgrade, and timing errors |
|
|
|
13216
|
Wed Aug 16 17:14:02 2017 |
Koji | Update | CDS | front-end/DAQ network down for kernel upgrade, and timing errors | What's the current backup situation? |
|
|
13215
|
Wed Aug 16 17:05:53 2017 |
Jamie | Update | CDS | front-end/DAQ network down for kernel upgrade, and timing errors | The CDS system has now been up moved to
a supposedly more stable real-time-patched
linux kernel (3.2.88-csp) and RCG r4447 (roughly |
|
|
13214
|
Wed Aug 16 16:05:53 2017 |
Kira | Update | PEM | temp sensor PCB | Tried taking the circuit from the breadboard
to the PCB. I attached all the components
to adapters that would allow them to be connected |
|
|
13213
|
Wed Aug 16 14:57:01 2017 |
Steve | Update | PSL | ref Cavity heating blanket power supply | The last entry I found relating to ref
cavity was
2011 Aug 19 |
|
|
13212
|
Wed Aug 16 14:54:13 2017 |
gautam | Update | CDS | PSL monitoring Acromag EPICS server restarted | [johannes,
gautam, jamie]
Made a directory |
|
|
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 |
|