| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8363
|
Thu Mar 28 01:59:33 2013 |
Jenne | Update | Locking | PRMI progress - even better! | [Gabriele, Rana, Jenne, Jamie, Lisa, Zach]
We
tweaked some things after dinner, and our |
|
|
8362
|
Thu Mar 28 00:31:11 2013 |
Jenne | Update | SUS | PRMI optics' oplev servos tuned | [Rana, Gabriele, Jenne, Jamie, Lisa, Rana]
We have tuned the oplev servos for
PRM, BS, ITMX, ITMY. For each, we measured |
8x |
|
8361
|
Wed Mar 27 21:53:21 2013 |
Annalisa | Update | ABSL | Beat note of ATF auxiliary laser | After measuring the beat note, the "Alberto"
NPRO auxiliary laser has been moved from
the PSL table to the POY table. Its beam |
|
|
8360
|
Wed Mar 27 15:46:13 2013 |
Jenne | Update | Locking | PRMI progress | [Gabriele, Jenne]
We have achieved PRMI locks of the
order ~5 seconds! Here is an example lock: |
|
|
8359
|
Tue Mar 26 20:20:10 2013 |
Charles | Update | ISS | ISS Design Plans - Servo Noise Analysis | In order to allow other individuals besides
myself to consider the proposed design of
the ISS, I have created a publicly available |
|
|
8358
|
Tue Mar 26 17:32:30 2013 |
Chloe | Update | | QPD/ECDL Progress | I built the summing/subtracting circuit
on the breadboard, and hooked this up with
one of the other QPDs I found (image of setup |
|
|
8357
|
Tue Mar 26 17:27:17 2013 |
Koji | Update | IOO | Tuning MC length/FSR | Please add the discussions on the cavity
absolute length (and its change, adjustment
precision), |
|
|
8356
|
Tue Mar 26 16:36:24 2013 |
Steve | Update | 40m Upgrading | table leveling mounts go here |
|
|
|
8355
|
Tue Mar 26 16:10:31 2013 |
Jamie | Update | 40m Upgrading | ETMY table leveling | Steve's suggestion for how to level the
end table using "swivel leveling mounts":
|
|
|
8354
|
Tue Mar 26 15:43:45 2013 |
rana | Update | IOO | Tuning MC length/FSR | Please attach
the data file of the measurement |
|
|
8353
|
Tue Mar 26 15:00:55 2013 |
Manasa | Update | IOO | Tuning MC length/FSR |
|
|
|
8352
|
Tue Mar 26 11:33:55 2013 |
Jamie | Update | Optics | HOWTO calculate effective RoC of flipped TT | In case anyone is curious how I got the
numbers for the effective radius of curvature
of the flipped TT mirrors, I include the |
|
|
8351
|
Tue Mar 26 11:08:03 2013 |
Jenne | Update | Locking | PRMI locking should be possible - let's get it done! | [Jenne, Gabriele, Jamie]
We have looked at Koji's old Finesse
code, and determined that the PRMI sensing |
|
|
8350
|
Tue Mar 26 08:50:02 2013 |
Steve | Update | General | janitor day | Keven, our janitor accidentally pushed
the main entry door laser emergency stop
switch. |
|
|
8349
|
Tue Mar 26 01:40:49 2013 |
Koji | Update | IOO | Tuning MC length/FSR | I'm still waiting for the follow-up analysis
of the modulation freq tuning. |
|
|
8348
|
Tue Mar 26 00:17:47 2013 |
Jenne | Update | Locking | REFL pickoff fraction | To see how much of the light that comes
out of the REFL port actually goes to the
PDs, I measured the power immediately after |
|
|
8347
|
Tue Mar 26 00:06:37 2013 |
Jenne | Update | Locking | AS beam put back on PD | [Jenne, Gabriele]
We aligned MICH (first locked Yarm,
but didn't optimize since we don't have TRY, |
|
|
8346
|
Mon Mar 25 23:27:26 2013 |
Chloe | Update | | QPD Circuit | In order to test the mount vibrations,
I will likely try and make a different circuit
work (with the summing/subtracting on an |
|
|
8345
|
Mon Mar 25 23:20:57 2013 |
Annalisa | Summary | Auxiliary locking | Beat note found! | [Annalisa, Manasa]
The beat note between the main PSL
and the auxiliarly NPRO has been found! |
|
|
8343
|
Mon Mar 25 23:17:11 2013 |
rana | Summary | IOO | MC | I measured the dark noise and regular intensity
noise in MC trans tonight to get some estimate
for the free running spectrum that the Chas |
|
|
8342
|
Mon Mar 25 18:58:09 2013 |
Albert Yang | Update | optical tables | Optical Table Toolboxes | For those of you who spend annoying amounts
of time looking for tools, fear no more.
Toolboxes for each optical table are coming! |
|
|
8341
|
Mon Mar 25 18:42:38 2013 |
Manasa | Update | 40m Upgrading | Endtable upgrade for auxiliary green laser : Timeline | Endtable upgrade - timeline and progress
chart. End table upgrade wiki page updated.
|
|
|
8340
|
Mon Mar 25 18:07:31 2013 |
Steve | Update | 40m Upgrading | ETMY table is out |
|
|
|
8339
|
Mon Mar 25 16:51:59 2013 |
Jenne | Update | Optics | updated calculations of PRC/SRC g-factors and ARM mode matching | I think we like the idea of flipping SR2
better than SR3 for the same ghost beam reasons
as PR2 is better than PR3. There isn't |
|
|
8338
|
Mon Mar 25 16:51:43 2013 |
Chloe | Update | | Final QPD Circuit Design | This is the final version of the QPD circuit
I'm going to build. After playing around
with the spatial arrangement, this should |
|
|
8337
|
Mon Mar 25 15:24:41 2013 |
rana | Update | Locking | TT1 drift |
I doubt that it has truly disappeared.
Can you please make a measurement of it and |
|
|
8336
|
Mon Mar 25 15:01:33 2013 |
Manasa | Update | Locking | TT1 drift |
|
|
|
8335
|
Mon Mar 25 11:42:45 2013 |
Jamie | Update | Computers | c1lsc mx_stream ok | I'm not exactly sure what the problem was
here, but I think it had to do with a stuck
mx_stream process that wasn't being killed |
|
|
8334
|
Mon Mar 25 09:52:22 2013 |
Jenne | Update | Computers | c1lsc mxstream won't restart | Most of the front ends' mx streams weren't
running, so I did the old mxstreamrestart
on all machines (see elog |
|
|
8333
|
Fri Mar 22 23:23:38 2013 |
Annalisa | Update | Locking | Beat note still missing | [Annalisa, Manasa, Koji]
I updated the setup for the beat
note. The main reason is that I needed to |
|
|
8332
|
Fri Mar 22 19:46:29 2013 |
Koji | Summary | LSC | Diode impedance test result | I've tested Perkin-Elmer InGaAs PDs at
OMC Lab.
- The diode impedances were measured |
|
|
8331
|
Fri Mar 22 01:28:56 2013 |
Manasa | Update | Lasers | Beam profile of NPRO from ATF | The NPRO from ATF has been installed on
the POY table.
I have been making measurements to |
|
|
8330
|
Thu Mar 21 17:06:34 2013 |
Steve | Update | 40m Upgrading | ETMY table is out |
|
|
|
8329
|
Thu Mar 21 14:02:45 2013 |
Annalisa | Update | Locking | incident angles |
|
|
|
8328
|
Thu Mar 21 13:50:08 2013 |
Jamie | Update | Locking | incident angles | Is there a reason to use non-45 degree
incident angles on the steering mirrors between
the laser and the PD? I would always |
|
|
8327
|
Thu Mar 21 13:11:42 2013 |
Annalisa | Update | Locking | Finding the beat note |
|
|
|
8326
|
Thu Mar 21 12:33:51 2013 |
rana | Update | Computers | Fixed | Please stop power cycling computers. This
is not an acceptable operation (as Jamie
already wrote before). When you don't know |
|
|
8325
|
Thu Mar 21 12:04:05 2013 |
Manasa | Update | Computers | Fixed | All FE computers are back.
Restart procedure:
0a. Restart frame builder: |
|
|
8324
|
Thu Mar 21 10:29:12 2013 |
Manasa | Update | Computers | Computers down since last night | I'm trying to figure out what went wrong
last night. But the morning status...the
computers are down. |
|
|
8323
|
Thu Mar 21 10:19:28 2013 |
Koji | Update | Locking | Finding the beat note | Give us more info on the elog:
What PD are you using? How much power |
|
|
8322
|
Thu Mar 21 09:53:46 2013 |
Annalisa | Update | Locking | Finding the beat note | Yesterday I tried to find the beat
note between the main PSL and the auxiliary
NPRO, but I didn't :( |
|
|
8321
|
Thu Mar 21 08:46:46 2013 |
Manasa | Update | 40m Upgrading | ETMY table swap | Yes! We are swapping.
I'll be there very soon! |
|
|
8320
|
Thu Mar 21 08:11:53 2013 |
Steve | Update | 40m Upgrading | ETMY table swap |
|
|
|
8319
|
Wed Mar 20 16:45:59 2013 |
Manasa | Bureaucracy | Auxiliary locking | Fetched NPRO from ATF | [Koji, Annalisa, Manasa]
NPRO with controller from ATF joins
the 40m. We have put it on the POY table |
|
|
8318
|
Wed Mar 20 15:51:54 2013 |
Manasa | Update | 40m Upgrading | Endtable upgrade |
|
|
|
8317
|
Wed Mar 20 14:52:09 2013 |
Manasa | Update | SAFETY | MC trans RFPD missing | PDA255 at the MC transmission end is missing
and whoever had removed it earlier has left
the |
|
|
8316
|
Wed Mar 20 14:44:47 2013 |
Jamie | Update | Optics | updated calculations of PRC/SRC g-factors and ARM mode matching | Below are new alamode calculations of the
PRC and SRC g-factors and arm mode matchings.
These include fixes to the ABCD matrices |
|
|
8315
|
Wed Mar 20 14:00:21 2013 |
Steve | Update | 40m Upgrading | Endtable upgrade | As discussed at the 40m meeting: Koji,
Manasa and Steve
|
|
|
8314
|
Wed Mar 20 08:59:24 2013 |
Steve | Update | PEM | air cond maitenance is today | Outside air quality at 8:30am
1.1 million of 0.5 micron particles cf /
min with MET counter #2 |
|
|
8313
|
Tue Mar 19 20:24:56 2013 |
Annalisa | Update | Auxiliary locking | Auxiliary laser on PSL table | I moved the auxiliary laser from
the ITMY table to the PSL table and installed
all the optics (mirrors and lenses) to steer |
|