ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
12385
|
Tue Aug 9 13:53:57 2016 |
babbott | Update | SEI | long Guralp EX cable repaired on the D-sub side | I checked out the cable that I
took from you, and all of the connections |
|
|
12386
|
Tue Aug 9 15:27:57 2016 |
gautam | Update | SUS | ETMY patch-up | The pickle
pickers came off nicely and both magnets
seem to be glued on okay. The alignment of |
|
|
12387
|
Tue Aug 9 15:50:30 2016 |
Praful | Update | General | Guralp Cable | The Guralp cable has been reconnected and
powered after having the connector changed
out. |
|
|
12388
|
Tue Aug 9 16:19:27 2016 |
Steve | Update | SUS | torque driver for wire clamp | New
Wiha 28504 torque wrench for SOS wire
clamping. It's range 7.5 - 20 in-lb |
|
|
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 |
|
|
12390
|
Wed Aug 10 03:08:03 2016 |
gautam | Update | SUS | ETMY patch-up | [lydia, gautam]
Rana felt it was alright to use
the wire clamp and suspension cage in its |
|
|
12391
|
Wed Aug 10 10:32:44 2016 |
Steve | Update | SEI | working Guralps as they are | The saga has started
here We have to give credit to
the Boss who fixed it. The seismometers themself |
6x |
|
12392
|
Wed Aug 10 15:34:24 2016 |
Steve | Update | SUS | 6 in-lbs torque driver for wire clamp screw | The 7.5 in-lb of Wiha seems at the upper
end of torque range for a 4-40 SS screw
Wiha 28502 ordered with range 5 |
|
|
12393
|
Wed Aug 10 17:20:16 2016 |
Lydia | Update | General | Seismometer channel names changed | [ericq, Lydia]
We
changed the seismometer channel names from, |
|
|
12394
|
Wed Aug 10 17:30:26 2016 |
Max Isi | Update | General | Summary pages status | Summary pages are currently empty due to a
problem with the code responsible for locating
frame files in the cluster. This should be |
|
|
12395
|
Wed Aug 10 18:10:26 2016 |
Praful | Update | Electronics | Mic Amplifier | I set up 3 of my circuits in the interferometer
near MC2 to do a huddle test. I have the
signals from my microphones going into C1:PEM-MIC_1_IN1, |
|
|
12396
|
Wed Aug 10 19:37:08 2016 |
gautam | Update | Electronics | Mic Amplifier | In order to help Praful do his huddle test,
I have temporarily arranged
for the outputs of the 3 channels he wants |
|
|
12397
|
Wed Aug 10 23:45:03 2016 |
gautam | Update | SUS | ETMY re-suspended | Summary:
|
7x |
|
12398
|
Thu Aug 11 00:20:41 2016 |
Koji | Update | SUS | ETMY re-suspended | How much pitch bias do you need in order
to correct this pitch misalignment?
That may give you the idea how bad |
|
|
12399
|
Thu Aug 11 11:09:52 2016 |
Max Isi | Update | General | Summary pages status | This problem has been fixed.
> Summary pages are currently empty due to |
|
|
12400
|
Thu Aug 11 11:51:38 2016 |
Praful | Update | Computer Scripts / Programs | Summary Pages | The summary pages have been updated with
the new naming seismometer channel naming
conventions. Here's a link to them working |
|
|
12401
|
Thu Aug 11 11:56:40 2016 |
gautam | Update | SUS | ETMY re-suspended |
|
|
|
12402
|
Thu Aug 11 17:30:05 2016 |
Praful | Update | Electronics | Mic Amplifier | The results of my first huddle test were
not so good- one of the signals did not match
the other two very well- so I changed the |
|
|
12404
|
Fri Aug 12 14:37:34 2016 |
Steve | Update | SEI | working seismometers as they are | 2.1 mag earth quake in Norhten Ca
Our seimometers need professorial
centering. Related electronics must be checked |
|
|
12405
|
Fri Aug 12 19:13:25 2016 |
Praful | Update | Electronics | Mic Self Noise | I used the Wiener filtering method described
by Ignacio and Jessica (https://dcc.ligo.org/DocDB/0119/T1500195/002/SURF_Final.pdf
and https://dcc.ligo.org/public/0119/T1500194/001/Final_Report.pdf) |
8x |
|
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 |
|
|
12407
|
Sat Aug 13 18:25:22 2016 |
gautam | Update | COC | RC folding mirrors - Numerical review | This elog
is meant to summarize my numerical simulations
for looking into the effects of curvature |
|
|
12408
|
Mon Aug 15 12:23:56 2016 |
Praful | Update | PEM | Mic Self Noise | I didn't have a separate training set
and data set, so I think that's why the
graphs came out looking too good. The units |
9x |
|
12409
|
Mon Aug 15 14:29:32 2016 |
Steve | Update | SUS | SOS sus wire ordered | The wire will arrive in 1-2 weeks. It is
a new production. Brad Snook of Ca Fine Wire
was suprised that we are still using the |
|
|
12410
|
Mon Aug 15 14:34:33 2016 |
ericq | Update | SUS | SOS sus wire ordered | We have indeed seen numerous tarnished/rusty
points along the wires, and just tried to
choose lengths free of any of these. I wonder |
|
|
12411
|
Mon Aug 15 18:28:15 2016 |
gautam | Update | SUS | Air-bake preparation | I
assume that we are prepared to live with
the pitch bias situation of ETMY |
|
|
12412
|
Tue Aug 16 08:04:49 2016 |
Steve | Update | SUS | ETMY had Aluminum bridge | The SOS ETMY tower had and Aluminum bridge.
How is it possible that this was true? Is
SS better than Al for some quantitative |
|
|
12413
|
Tue Aug 16 11:51:43 2016 |
gautam | Update | COC | RC folding mirrors - Numerical review | Summary of roundtable meeting yesterday
between EricG, EricQ, Koji and Gautam:
We identified two possible courses |
|
|
12414
|
Tue Aug 16 16:38:00 2016 |
gautam | Update | COC | RC folding mirrors - Numerical review | Here are the results for case 2: (flat
PR3/SR3, for purpose of simulation, I've
used a concave mirror with RoC in the range |
|
|
12415
|
Tue Aug 16 21:54:27 2016 |
gautam | Update | SUS | Air-bake - IN PROGRESS | I
put in both ETMX and ETMY into the air-bake
oven at approximately 8.45pm tonight. |
|
|
12416
|
Wed Aug 17 08:47:43 2016 |
ericq | Update | SUS | Air-bake finished | I turned off the air bake oven at 8:45AM.
I'll leave the optics alone for a bit
while it cools. |
|
|
12417
|
Wed Aug 17 14:37:36 2016 |
gautam | Update | COC | RC folding mirrors - Numerical review |
|
|
|
12418
|
Wed Aug 17 16:28:46 2016 |
Koji | Update | COC | RC folding mirrors - Numerical review | For the given range of the PR3/SR3 RoCs
for both cases, all the resulting numbers
such as TMSs/mode matching ratios look reasonable |
|
|
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 |
|
|
12420
|
Wed Aug 17 23:00:57 2016 |
gautam | Update | SUS | Air-bake of towers | I just put in the following into the air
bake oven for a 12 hour, 70C bake:
ETMX and ETMY cages (with |
|
|
12421
|
Thu Aug 18 08:17:16 2016 |
Steve | Update | SUS | wire clamping preparation | The wire inprints were removed by 800P
grain paper [Norton 73568] The SS bridge
block now has an undesireble vally in the |
|
|
12422
|
Thu Aug 18 14:14:20 2016 |
gautam | Update | SUS | Air-bake of towers - finished | I took the two cages, wires and wire clamps
out this morning, back into the cleanroom
after their 12 hour 70C bake. |
|
|
12423
|
Thu Aug 18 15:16:09 2016 |
Steve | Update | SUS | SOS sus wire is in |
Stress Relieved 0.0017"
Music Wire CFW P/N: CFW2035025, |
|
|
12424
|
Fri Aug 19 22:51:12 2016 |
gautam | Update | SUS | ETMs first-contacted | I've applied first contact to both
the ETMs. They're now ready to be suspended.
I've also cut up some lengths of the |
|
|
12426
|
Sun Aug 21 16:23:05 2016 |
gautam | Update | SUS | ETMX suspended |
ETMX has been successfully suspended
I've
used one of the new wire clamps, and also
the new suspension wire
Because |
|
|
12427
|
Sun Aug 21 17:21:22 2016 |
Praful | Update | Electronics | Problems with PCB Circuit | For the past week, I've been trying
to make a soldered amplifier circuit to use
in a prototype box, However, I've been |
18x |
|
12428
|
Mon Aug 22 13:06:11 2016 |
gautam | Update | SUS | ETMY suspended | Today morning, I suspended ETMY and made
the same checks dscribed below. The clamping
went smoothly, 5 in. lb. of torque seems |
|
|
12429
|
Mon Aug 22 16:33:32 2016 |
Steve | Update | PEM | the lab temp is up | The IFO room temp is up a bit and it is
coming down. The out side temp is not really
high. |
|
|
12430
|
Mon Aug 22 18:04:24 2016 |
gautam | Update | SUS | ETMY OSEMs inserted | [Johannes, gautam]
We worked on trying to insert the
OSEMs in the optimal positions such that |
|
|
12431
|
Mon Aug 22 18:35:16 2016 |
Praful | Update | PEM | the lab temp is up | The temperature is decreasing slowly but
is still above 24 C.
|
|
|
12432
|
Tue Aug 23 09:50:17 2016 |
Max Isi | Update | General | Summary pages down due to cluster maintenance | Summary pages down today due to schedulted
LDAS cluster maintenance. The pages will
be back automatically once the servers are |
|
|
12433
|
Tue Aug 23 17:05:20 2016 |
Praful | Update | Electronics | Soldered Circuit Working | I remade another soldered circuit, adding
extra 100uF electrolytic bypass capacitors
at the input and output of the voltage regulator |
10x |
|
12434
|
Tue Aug 23 19:35:38 2016 |
gautam | Update | SUS | ETMY back in IFO | [johannes,
gautam] |
10x |
|
12435
|
Tue Aug 23 22:58:16 2016 |
Koji | Update | Electronics | Decoupling capacitor 101 | What I suggested was:
- For most cases, power decoupling
capacitors for the regulators should be ~100nF |
|
|
12436
|
Wed Aug 24 14:11:09 2016 |
Praful | Update | Electronics | Microphone Testing | I added an EM172 to my soldered circuit
and it seems to be working so far. I have
taken a spectra using the EM172 in ambient |
|