ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
11954
|
Wed Jan 27 20:51:00 2016 |
rana | Update | PEM | ETMX floor vs table noise | I didn't really appreciate this measurement
until just now. IF you can save the DTT .xml
file with all the traces in it (i.e. NOT |
|
11962
|
Fri Jan 29 16:55:27 2016 |
rana | Update | Green Locking | Innolight laser is 10 years old | I don't think there's any evidence
that the noise eater is bad. That would change
the behavior of the relaxation oscillation |
|
12022
|
Sat Mar 5 10:37:48 2016 |
rana | Update | IOO | PSL Laser Opened | Sorry, that was me; taking some photos
of the PSL and EX mirrors.
|
|
12027
|
Tue Mar 8 18:22:20 2016 |
rana | Update | Green Locking | Laser swap - some improvement | Why is the transmission of X green so low?
Perhaps you can phase lock the IR and then
scan the X frequency, using the X arm as |
|
12030
|
Thu Mar 10 16:32:45 2016 |
rana | Update | endtable upgrade | Inventory check | Its not a good idea to use green mounts
with green lasers. Steve should be able to
get another copy of the EY doubler mount |
|
12032
|
Sat Mar 12 22:23:37 2016 |
rana | Summary | IOO | PMC relocked | Found it locked on TEM01 mode.
Sweets in the fridge for non-PhD
holders, courtesy of the highest levels of |
|
12048
|
Fri Mar 25 23:54:04 2016 |
rana | Update | PEM | Guralp Seismometers | Something seems not right. The Guralp response
should be flat in velocity from 0.05-30 Hz.
Why is there any feature at 1 Hz? Saturation |
|
12092
|
Wed Apr 27 09:45:56 2016 |
rana | Update | SUS | spare SOS tower | Bah, we need ruby slippers for all future
suspensions. Prism with curved backside and
smooth grooves. |
|
12093
|
Wed Apr 27 14:06:31 2016 |
rana | Summary | General | meeting notes |
Gautam will get
help from Johannes and finish EX table by
Monday.
Steve |
|
12098
|
Thu Apr 28 18:53:05 2016 |
rana | Update | LSC | Green PDH demod lowpass | OK - but give us a circuit diagram and
the expected before/after loop plots. Got
to make sure we keep the right impedance |
|
12102
|
Mon May 2 17:06:58 2016 |
rana | Summary | COC | G&H optics to Fullerton/HWS for anneal testing | Steve sent 4 of our 1" diameter G&H
HR mirrors to Josh Smith at Fullerton for
scatter testing. Attached photo is our total |
|
12103
|
Mon May 2 17:11:55 2016 |
rana | Update | COC | RC folding mirrors | Antonio/Gautam
are now developing a more up to date Finesse
model of our recycling cavities to see what |
|
12108
|
Thu May 5 14:05:01 2016 |
rana | Update | endtable upgrade | ALS status update | All seems very fishy. Its not good to put
attenuators and filters in nilly-willy.
Once the post-PD bandpass |
|
12111
|
Fri May 6 19:08:52 2016 |
rana | Update | LSC | Green PDH demod lowpass | Seems weird to design a PD lowpass with
a corner at the modulation frequency. Recall
what our strategy is with the other photodetectors |
|
12113
|
Sun May 8 08:39:21 2016 |
rana | Update | LSC | Green PDH demod lowpass | Indeed. This is why the LSC PDs have a
2f notch in addition to the 1f resonance.
In recent versions, we also put a 2f notch |
|
12178
|
Tue Jun 14 16:53:16 2016 |
rana | Update | SUS | ETMX watch | What about ETMY? and are these really microradians
or just some made up cal? |
|
12193
|
Thu Jun 16 18:42:12 2016 |
rana | Update | COC | Contrast as a function of RoC of ETMX | That sounds weird. If the ETMY RoC |
|
12197
|
Mon Jun 20 01:38:04 2016 |
rana | Update | COC | Contrast as a function of RoC of ETMX | So, it seems that changing the ETMX for
one of the spares will change the contrast
defect from ~0.1% to 0.9%. True? Seems like |
|
12210
|
Wed Jun 22 08:40:42 2016 |
rana | Update | LSC | Y arm @ 30kHz UGF w/POY, AO | Below 100 Hz, I suppose this means that
the X arm is now limited by the quadrature
sum of the X and Y arm seismic noise. |
|
12214
|
Sun Jun 26 15:27:28 2016 |
rana | Frogs | IOO | PMC /MC lopced | Found PMC unlocked for many hours so I
relocked it. IMC relocked by itself, but
the input switch seems to be flickering to |
|
12245
|
Tue Jul 5 19:10:41 2016 |
rana | Update | General | Vent progress | I'd suggest clamping and moving it
to the flow bench so you can inspect with
a bright light. Then remove the wire and |
|
12286
|
Sun Jul 10 18:20:39 2016 |
rana | Update | Electronics | Antialiasing Filter Update | Comments on the schematic:
Only the instrumentation
amp should be made up of the ADA4004. Not |
|
12330
|
Mon Jul 25 12:22:18 2016 |
rana | Update | Computer Scripts / Programs | Finished MEDM Tab on Summary Pages | Looks pretty great. However, there's
two problems:
1) Some of the MEDM screens don't |
|
12332
|
Mon Jul 25 13:47:19 2016 |
rana | Update | General | ETMX suspension - progress | Ugh. |
|
12343
|
Wed Jul 27 16:56:47 2016 |
rana | Metaphysics | SUS | Broken wire | For the rest of this vent, at least, we
need to start using the EQ stops
more frequently. Whenever the |
|
12350
|
Thu Jul 28 22:43:03 2016 |
rana | Update | General | ETMY UL magnet broke off | I'd recommend replacing the wire and
grinding down the clamp to prevent cutting
the wire. Since we have almost never replaced |
|
12358
|
Sun Jul 31 17:28:38 2016 |
rana | Omnistructure | General | upclean | I cleaned up the south Electronics bench
today.
The other two, as well as several |
|
12361
|
Mon Aug 1 20:09:37 2016 |
rana | Update | CDS | DAFI Update | I found the DAFI screen as a button inside
of the LSC screen - I think its more logically
found from the sitemap, so I'll move |
|
12371
|
Thu Aug 4 10:57:58 2016 |
rana | Update | Computer Scripts / Programs | NODUS update / restarts underway | Usual Ubuntu apt-get upgrades; long delayed
but now happening. |
|
12389
|
Tue Aug 9 19:35:49 2016 |
rana | Update | SEI | both Guralp seismometers are functioning and being acquired | After
some cable swapping, we now have both Guralp
seismometers running and the times series |
|
12406
|
Fri Aug 12 21:26:28 2016 |
rana | Update | PEM | Mic Self Noise | Seems to good to be true. Maybe you're
over fitting? Please put all the traces on
one plot and let us know how you do the parameter |
|
12419
|
Wed Aug 17 22:09:04 2016 |
rana | Update | SUS | SOS sus wire ordered | Not really true that it passed. That's
just an arbitrary margin. Best to throw away
all the old wire. We have no quantitative |
|
12460
|
Thu Sep 1 15:28:01 2016 |
rana | Update | Electronics | Acoustic Tab and Amp Suspension |
add photo of installation
no
more secret personal pages! put channels
into the actual pages that we look at
make |
|
12462
|
Thu Sep 1 15:43:16 2016 |
rana | Update | SUS | OSEM adjustments | On the bounce roll balancing:
Recall that back in 2006, the main
issue was not with the bounce mode coupling |
|
12468
|
Fri Sep 2 21:16:45 2016 |
rana | Update | Electronics | Satellite Amplifier | In November of 2010, Valera Frolov (LLO),
investigated
our satellite amplifiers and made some recommendations |
|
12470
|
Mon Sep 5 21:05:06 2016 |
rana | Update | Electronics | Satellite Amplifier | The attached PDF shows the output noise
of the satellite amp. This was calculated
using 'osempd.fil' in the 40m/LISO |
|
12472
|
Tue Sep 6 18:21:13 2016 |
rana | Update | SUS | OSEM issues | I looked at the PRM free swing spectra.
The modes look like they're at the right
frequencies, so pointing more and more towards |
|
12473
|
Tue Sep 6 20:30:56 2016 |
rana | Update | SUS | ITMY_UL is sick | In the morning, Steve will start opening
the north BS door so that we can enter to
inspect the PRM LR OSEM. |
|
12481
|
Sat Sep 10 14:26:01 2016 |
rana | Update | General | PRM SRM alignment | For the PRM, I aligned it until the arm
flashes were maximized and the REFL camera
showed a centered spot with dips happening |
|
12501
|
Sat Sep 17 02:00:23 2016 |
rana | Update | SUS | Alignment status | All is not lost. I've stuck and unstuck
optics around a half dozen times. Can you
please post the zoomed in time series (not |
|
12503
|
Sun Sep 18 16:18:05 2016 |
rana | Update | SUS | Alignment status | susaux is responsible for turning on/off
the inputs to the coil driver, but not the
actual damping loops. So rebooting susaux |
|
12506
|
Mon Sep 19 13:57:21 2016 |
rana | Update | General | never post EPS files in the ELOG. Ever. | http://tex.stackexchange.com/questions/2092/which-figure-type-to-use-pdf-or-eps |
|
12508
|
Tue Sep 20 10:45:06 2016 |
rana | Update | General | Further recovery progress | Rana suspicious. We had arms locked before
pumpdown with beams on Transmon PDs. If they're
off now, must be beams are far off on the |
|
12522
|
Thu Sep 29 09:49:53 2016 |
rana | Update | General | mucking about | With the WFS and OL, we never have figured
out a good way to separate pit and yaw. Need
to figure out a reference for up/down and |
|
12543
|
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. |
|
12562
|
Fri Oct 14 15:47:00 2016 |
rana | Update | Treasure | filters + clip | I say just fix the clipping. Don't
worry about the PRM OSEM filters. We can
do that next time when we put in the ITM |
|
12572
|
Wed Oct 19 17:02:34 2016 |
rana | Update | General | Viewports & coating of 2016 | These old specs are not so bad. But we
now want to get replacements for the TRX
and TRY and PSL viewports that are R <0.1% |
|
12588
|
Fri Oct 28 19:13:57 2016 |
rana | Update | General | PR gain | I don't think the loss of 25 ppm is
outrageous. Its just surprisingly good. The
SIS model predicted numbers more like 1 ppm |
|
12600
|
Sat Nov 5 15:45:44 2016 |
rana | Update | CDS | c1auxex channels/pins for Acromag | We don't need to record any of the
AIOut channels, the OL channels (since we
record them fast), or the _MEAN channels |
|
12615
|
Mon Nov 14 19:32:51 2016 |
rana | Summary | CDS | Replacing DIMM on Optimus | I did apt-get update and then apt-get upgrade
on optimus. All systems are nominal. |
|