 Thu Jun 30 03:26:40 2011, kiwamu, Update, ABSL, status update
|
Status update of the absolute length (ABSL) measurement:
- To accommodate the ABSL stuff, the AS path was relocated on the AP table.
(In this evening Jenne was able to lock MICH with AS55, so it's working fine.) |
|
Wed May 11 22:52:55 2011, kiwamu, Update, LSC, status update and plan
|
Rana forced me to write this entry for summary because he didn't come to the
40m meeting today.
Status update : |
|
Sat Dec 10 05:27:43 2011, kiwamu, Update, Green Locking, status update of the Y arm green lock
|
Status update of the Y arm green lock:
+ Recent goal : automation of the single arm green lock
|
 Sun Dec 11 17:28:36 2011, kiwamu, Update, Green Locking, status update of the Y arm green lock 
|
Quote from #6102
+ |
|
Thu Jan 20 04:43:28 2011, kiwamu, Update, Green Locking, status update: PLL connected to ADC
|
I connected the PLL signal to the ADC on c1ioo.
So now we are able to take the data into the digital world, and will
be able to feedback signals to the suspensions. |
|
Thu Jan 20 15:15:39 2011, kiwamu, Update, Green Locking, status update: PLL connected to ADC
|
I realized that the black AA board I mentioned on the last entry
has the same range issue as Valera reported before (see #3911 |
|
Mon Aug 6 10:53:32 2012, steve, Update, VAC, status: vauum normal
|
The power outage did not have any effect on the vacuum system. I had to open VM1 to the RGA because of flaky CC1 cold cathode gauge
fluctuations. |
|
Wed Nov 7 15:17:15 2012, Steve, Update, Alignment, steering option with pico motor?
|
We have two ready for vacuum 1.5" mirror mounts with pico motors in our hands.
|
|
Thu Oct 3 00:01:59 2013, rana, jenne, HowTo, LSC, steps to full IFO
|
In moving now to full IFO locking, there
are a number of sub-states to diagnose:
PRMI + 1 arm
Measure sensing matrix as arm is scanned into resonance. Compare time series of sensing matrix |
|
Thu Oct 3 01:18:57 2013, Koji, HowTo, LSC, steps to full IFO
|
| I vote on PRMI+1arm -> PRFPMI |
|
Thu May 24 16:39:47 2012, steve, Update, General, steve's webpage example
|
| 3 strip charts monitoring on 24 hours time scale: Vac, PSL-IFO, SUS and 10 channel video monitoring inside - outside of 40m lab |
|
Wed Jul 22 11:18:49 2009, rob, Configuration, Computers, sticky sliders
|
Quote:
|
|
Thu Mar 5 01:09:29 2009, rana, alberto, Update, DMF, still not working
|
We tried to run DMF on mafalda, but it didn't work. I tried to compile it using Rob's elog instructions.
On mafalda, I started matlab and ran the mdv_config.m to set up mDV. I tested that the seisBLRMS.m
script ran and correctly produced changes in the seisBLRMS strip tool. but when I tried to compile it I got:
|
|
Wed Jun 15 11:21:51 2016, jamie, Update, CDS, still work to do to transition to new configuration/code
|
Just to be clear, there's still quite a bit of work to fully transition the 40m to this new system/configuration. Once we determine a good
configuration we need to complete the install, and modify the setup to run the two binaries instead of just the one. The data is also being written
to a raid on the new fb1, and we need to decide if we should use this new raid, or try to figure out how to move the old jetstor raid to the new fb1 machine. |
|
Mon Jun 6 17:28:31 2011, steve, Update, Computers, still, no PEM channels
|
Quote:
AA filter box was removed and modified at 1Y7 today. The -5V power supply was current limited when I plugged it back in. It was removed for |
|
Wed Sep 7 18:19:37 2011, steve, HowTo, VAC, stop pump down for overnight
|
Quote:
Jamie and Steve |
|
Wed Nov 3 16:49:31 2010, steve, Update, General, storage cabinet is in place
|
The south end of IFO room 104 was reshuffled. The flow bench was moved all the way to the south end to create more room for the crane reach. The old
large drawing cabinet was moved under the vacuum tube.
The new clear view through Acrylic-plexyglass cabinet is anchored. It has powder finished coating so it will not out-gas too much.The back |
|
Tue Nov 29 22:19:26 2011, Den, Update, digital noise, straight line
|
I tried to understand what part of the signal is corrupted while passing through a digital straight line without any filters. From here we can
figure out what precision is used.
I analysed coherence between C1:SUS-MC3_LSC_EXCMON and C1:SUS-MC3_LSC_OUTMON without any filters between them. |
|
Mon May 16 17:11:28 2011, steve, Update, Electronics, strain relieved 1X1
|
| 1X1 is strain relieved in the back. I will use similar approach on the rest of the racks . |
|
Thu Mar 31 11:30:51 2011, steve, Configuration, General, strain relieved rf cables
|
I strain relieved RF cables labeled 33 MHZ LO and 166 MHZ to EOM at 1X2 This is a temporary setup for the 11 MHZ
The coax N bulkheads connectors are mounted on the plastic front panel now. |
|
Thu Dec 9 12:24:46 2010, kiwamu, Update, SUS, strange ETMX suspension
|
[Koji, Osamu and Kiwamu]
We found that the ETMX free swinging spectra showed a strange resonant frequencies.
We are going to inspect the suspension today. |
|
Fri Jul 11 00:30:24 2008, rob, Metaphysics, Computers, strange SUS controllers
|
[I]rob, johnnie[B]M[/B][/I]
|
|
Wed Nov 25 23:17:34 2015, yutaro, Update, LSC, strange behavior of ASDC
|
[yutaro, Koji]
I noticed that ASDC level changes depending on the angle of ITMY when trying to take some data for loss map of YARM. We finally found that
ASDC level behaves strangely when the angle of ITMY in yaw direction is varied, as you can see in Attachment 1. Now, AS port recieved only the reflection |
|
Mon Nov 30 16:33:06 2015, ericq, Update, LSC, strange behavior of ASDC
|
One possible explanation of this behavior is simply poor centering of the AS beam on AS55 (whose DC level provides ASDC, if memory serves
me correctly).
I misaligned ETMY, and moved ITMY through its current nominal alignment while looking at the POYDC and ASDC levels. |
|
Mon Nov 30 18:27:30 2015, Koji, Update, LSC, strange behavior of ASDC
|
It wasn't fully mentioned in ELOG 11814.
We checked the PD first and this behavior didn't change after the realignment of the AS55PD.
Yutaro confirmed that this effect is happening in the vacuum chamber. |
|
Thu Dec 10 12:33:04 2015, yutaro, Update, LSC, strange behavior of ASDC
|
I did additional tests for the strange behavior of ASCD. ETMY, ETMX and ITMY were misaligned so that only light reflected by ITMX went into AS port.
I had done similar measurement before with ITMY YAW varied.
Attachment 1 shows how ASDC level changed when ITMX PIT varied. |
|
Thu Dec 10 19:53:22 2015, yutaro, Update, LSC, strange behavior of ASDC
|
To check if the strange behavior of ASDC is caused by SR2/SR3 or not, I did the following measurement:
ASDC measures the power of the light reflected by ITMX. POXDC measures the power of the light reflected by ITMX and SRM successively. Then I
varied the angle of ITMX in YAW direction and compared the behaviors of ASDC and POXDC. |
|
Sun Jul 23 15:00:28 2017, Jamie, Omnistructure, VAC, strange sound around X arm vacuum pumps
|
While walking down to the X end to reset c1iscex I heard what I would call a "rythmic squnching" sound coming from under the turbo pump.
I would have said the sound was coming from a roughing pump, but none of them are on (as far as I can tell).
Steve maybe look into this?? |
|
Tue Jan 10 09:17:23 2012, steve, Update, Photos, strawman's visiters
|
| |
|
Tue Mar 2 12:20:54 2010, kiwamu, Update, PSL, stray beam
|
In order to block stray beams, I have put some beam dumps and razor blades on the PSL table.
There were three undesired spots in total. I found two spots on the south side door of the PSL room, close to Mach-Zehnder.
Another spots was on the middle of the north door. Now they all are blocked successfully. |
|
Tue May 29 00:48:51 2012, Den, Update, PEM, sts readout box
|
STS readout box seems to be partly broken. I've terminated inputs from the seismometer and measured the output. I could not do this for vertical channel
because it outputs 7 V DC + 500 mV AC signal. All the switches work fine, 5 V DC is indeed shown when auto zero, calibration, 1 sec resp, sig select are
enables. The box has AC power supply that seems to work ok, all measured DC values are equal to the labels. Something is wrong with amplification. |
|
Sun Mar 18 00:29:24 2012, Den, Update, PEM, sts-2
|
I've turned off the power of the STS-2 readout box as it provides outputs with ~10 Volts DC offset! AA filter box works in the range -2 +2 Volts, so
we do not have any useful information anyway. I'll adjust the mass positions in the seismometer. |
|
Sun Jun 3 01:30:07 2012, Den, Update, PEM, sts-2 and guralp in isolation box
|
We have 2 sts-2 readout box - pink and blue. Pink outputs 12 DVC - this a problem of amplifier. This box has a rectifier (the box works from AC power)
and an amplifier for velocity channels. Mass positions, calibration channels are connected by a wire from input to output. The amplifier for velocity channels
does not work properly, so I connected velocity channels directly to the output - the signal from sts-2 is large enough even without amplification. When |
|
Thu Jun 14 21:37:37 2012, yuta, Update, Green Locking, succeeded in 1FSR mode scan
|
[Jenne, Yuta]
We couldn't scan the Y arm for 1FSR last night because the ALS servo breaks while sweeping. |
|
Wed Nov 23 00:30:55 2011, Zach, Update, elog, sucks
|
| Tried the script 3 times and it didn't come back. Pkill'd and then scripted. That worked. |
|
Wed Jan 23 11:41:06 2008, steve, Update, PEM, sulfur smell in 40m
|
Led - acid car batteries were overcharged in the machine shop next door
and sulfuric acid smell is coming over to the ifo room.
|
|
Mon Oct 10 17:27:29 2016, rana, Update, DMF, summar pages dead again
|
| Been non-functional for 3 weeks. Anyone else notice this? images missing since ~Sep 21. |
|
Mon Oct 10 17:42:47 2016, Max Isi, Update, DMF, summar pages dead again
|
I've re-submitted the Condor job; pages should be back within the hour.
Quote:
Been non-functional for |
|
Tue Oct 11 08:09:46 2016, Max Isi, Update, DMF, summar pages dead again
|
Summary pages will be unavailable today due to LDAS server maintenance. This is unrelated to the issue that Rana reported.
Quote:
I've re-submitted |
|
Wed Jun 20 18:00:10 2012, rana, Summary, PSL, summaries
|
Nice PSL summaries from LHO:
https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=3187 |
|
Fri Aug 5 02:00:09 2011, kiwamu, Summary, General, summary of today's invac work
|
[Jamie, Jenne, Suresh, Steve, Koji, Kiwamu]
We got two green beams
coming out from the chambers ! |
|
Tue Aug 9 02:03:16 2011, kiwamu, Summary, SUS, summary of today's work on ETMY
|
[Rana / Jenne / Kiwamu]
The ETMY suspension tower is currently sitting on the north side of the table for some inspections.
The adjustment of the OSEMs is ongoing. |
|
Sun May 10 13:54:41 2015, rana, HowTo, Computer Scripts / Programs, summary page URL change
|
Also, EQ gave us a better (and not pwd protected) URL for the summary pages. Please replace your previous links with this new one:
https://nodus.ligo.caltech.edu:30889/detcharsummary/ |
|
Mon May 11 01:28:33 2015, rana, HowTo, Computer Scripts / Programs, summary page URL change
|
Like Steve pointed out, the summary pages show that the y-arm transmission drifts a lot when locked. The OL summary page shows that this is all due to
ITMY yaw.
Could be either that they coil driver / DAC is bad or that the suspension is poorly built. We need to dig into ITMY OL trends over long term |
|
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 rather than wait for someone
to look at the web page. |
|
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 pages are bank. Also the
ASC tab looks bogus to me. |
|
Wed Mar 29 09:24:28 2017, Steve, Update, lore, summery pages
|
| The summery pages are working at a slow motion speed. It's response time 12 minutes. |
|
Wed Jun 7 14:27:23 2017, Steve, Update, Summary Pages, summery pages not working
|
Last good page May 18, 2017
Not found, error message May 19 - June 4,2017
Blank plots, June 5, 2017 |
|
Tue Jun 21 16:11:13 2011, steve, Update, SAFETY, surf safety training
|
| 40m surfs: Nicole Ing, Iswita Saikia and Sonali Mohapatra received 40m specific safety training today. |
|
Tue Jun 25 10:23:20 2013, Steve, Update, safety, surf safety training
|
Alex Cole and Craig Cahillane received 40m specific, basic safety training last week.
|