| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
10376
|
Wed Aug 13 16:12:55 2014 |
Harry | Update | General | FOL Layout Diagram | Per Q's request, I've made up a diagram
of the complete FOL layout for general reference.
|
|
|
10375
|
Wed Aug 13 13:08:24 2014 |
rana | Update | IMC | Calculation for the input mode cleaner | Can you please give us some more details
on how this design was decided upon? What
were the design considerations? |
|
|
10374
|
Wed Aug 13 10:50:04 2014 |
Andres | Update | IMC | Calculation for the input mode cleaner | Calculation for the input mode
cleaner
I have been working on the
calculation for the input mode cleaner. I |
|
|
10373
|
Wed Aug 13 10:49:39 2014 |
Harry | Update | General | Weekly Update | In the past week, I designed and
assembled coupling telescopes for the PSL
and Y Arm Lasers |
|
|
10372
|
Wed Aug 13 03:03:37 2014 |
ericq | Update | General | Green beatnote troubles | [Jenne, Rana, ericq]
No luck locking tonight, as spent
a while trying to figure out the complete |
|
|
10371
|
Tue Aug 12 23:07:24 2014 |
Harry | Update | General | PSL Telescope | I put the PSL telescope in place, and started
coupling to it.
Unfortunately, I was only able to |
|
|
10370
|
Tue Aug 12 18:20:13 2014 |
ericq | Update | IOO | FSS box TFs | I made some measurements of the FSS box
today, to have TFs for a loop model, but
also to see what the difference between the |
|
|
10369
|
Tue Aug 12 14:29:01 2014 |
ericq | Update | General | Reasonable alignment restored |
|
|
|
10368
|
Tue Aug 12 13:31:58 2014 |
Jenne | Update | PEM | Seismometer cables in place, ready for sensors | [TaraV, Jenne]
The short cable from the slab to
the sensor has been assembled and installed |
|
|
10367
|
Tue Aug 12 02:09:39 2014 |
ericq | Update | General | Reasonable alignment restored | I took over the IFO, after Jenne's locking
efforts, which included manual alignment,
since the ASS was doing bad things. |
|
|
10366
|
Mon Aug 11 23:50:38 2014 |
rana | Configuration | Wiki | DokuWikis are back up |
|
|
|
10365
|
Mon Aug 11 23:32:54 2014 |
ericq | Summary | IOO | MC demod measurement | Here's the magnitude plot of the board
TF. As mentioned above, this was done with
Marconi+Scope, so we were not able to get |
|
|
10364
|
Mon Aug 11 22:07:31 2014 |
Koji | Summary | IOO | MC demod measurement | SCLF-5!? It's surprising as the cut off
of the OLTF is just above 1Hz. cf
this entry |
|
|
10363
|
Mon Aug 11 21:03:48 2014 |
ericq, rana | Summary | IOO | MC demod measurement | We measured
the TF of the MC Demod board today. |
|
|
10362
|
Mon Aug 11 10:23:39 2014 |
steve | Summary | SUS | oplev laser summary updated |
|
|
|
10361
|
Mon Aug 11 08:04:01 2014 |
Steve | Update | SUS | ETMX damping restored | |
|
|
10360
|
Sun Aug 10 00:54:54 2014 |
Harry | Update | General | AUX Couping | The Y End laser dumped SHG light has been
coupled into the yellow fiber that terminates
at the PSL table. |
|
|
10359
|
Sat Aug 9 14:35:28 2014 |
Koji | Summary | IOO | MC servo analysis | Eric's OLTF turned out consistent with
the AO path TF that has been measured by
me on Jul 31 (entry |
|
|
10358
|
Fri Aug 8 20:22:12 2014 |
Jenne | Metaphysics | General | kitchen sink water off |
|
|
|
10357
|
Fri Aug 8 19:42:59 2014 |
Jenne | Metaphysics | General | kitchen sink flooding | When I got back to the lab, there
was enough water that it was seeping under
the wall, and visible outside. Physical plant |
|
|
10356
|
Fri Aug 8 18:08:12 2014 |
Koji | Summary | IOO | MC servo analysis | The closed gain I meant is the AO path:
Use IN2 to excite the MC loop and measure
IN1 using MON2(?). |
|
|
10355
|
Fri Aug 8 16:45:40 2014 |
Nichin | Update | Wiki | PDFR wiki updated | The PDFR system has been documented
in the 40m wiki and all the relevant information
about making changes and keeping it updated |
|
|
10354
|
Fri Aug 8 15:57:29 2014 |
ericq | Summary | IOO | MC servo analysis | I did some further measurements,
to try and see what corresponds to what.
In the end I performed four measurements: |
|
|
10353
|
Fri Aug 8 14:42:41 2014 |
Akhil | Update | General | PID loop Design for beat note stabilization | The attached in a zip file are the
Simulink feedback loop models for the FOL
for both X and Y ends. The controller PID |
|
|
10352
|
Fri Aug 8 14:27:18 2014 |
Akhil | Update | Computer Scripts / Programs | FOL Scripts | The scripts written for interfacing
the FC with R Pi, building EPICS database,
piping data into EPICS channels,PID loop |
|
|
10351
|
Fri Aug 8 12:39:19 2014 |
ericq | Summary | IOO | MC servo analysis | I have measured the current boosted MC
CLG below 100kHz with an SR785. Swept sine
only could get me down to 10kHz, but I was |
|
|
10350
|
Fri Aug 8 11:22:35 2014 |
steve | Summary | SUS | oplev laser summary |
2005 |
|
|
10349
|
Thu Aug 7 17:09:53 2014 |
Harry | Update | General | AUX Coupling In Progress | I'm currently in the process of coupling
dumped SHG light from the Y arm end table
into fibers for FOL. |
|
|
10348
|
Thu Aug 7 16:47:35 2014 |
ericq | Update | SUS | Oplev Checkup | I noticed some weird behavior on
the ETMY oplev that led me to check them
all out. |
|
|
10347
|
Thu Aug 7 14:50:43 2014 |
Harry | Update | General | PER Measurement | Purpose
I wanted to do a more robust measurement
of PER of PM fibers for FOL, so I thought |
|
|
10346
|
Thu Aug 7 13:39:41 2014 |
Nichin | Update | Computer Scripts / Programs | Wrapping up PDFR | 1)The PDFR scripts have all been migrated
into /scripts/PDFR/
2) The MEDM screen to run PDFR is |
|
|
10345
|
Thu Aug 7 12:34:56 2014 |
Jenne | Update | LSC | Suspensions not kicking? | Yesterday, Q helped me look at the DACs
for some of the suspensions, since Gabriele
pointed out that the DACs may have trouble |
|
|
10344
|
Thu Aug 7 12:25:14 2014 |
Jenne | Update | IOO | FSS offset changed |
|
|
|
10343
|
Thu Aug 7 11:57:59 2014 |
Koji | Summary | IOO | MC servo analysis | LISO Fit for the IMC open loop TF. The
data and liso source for the fitting were
attached in the ZIP file. |
|
|
10341
|
Wed Aug 6 21:22:09 2014 |
Koji | Update | IOO | FSS offset changed | The fast feedback
should be around zero now! |
|
|
10340
|
Wed Aug 6 17:29:36 2014 |
Jenne | Update | IOO | FSS offset changed | The MC has been unstable and unhappy for
the last several hours. When I looked,
I saw that the FSS_FAST monitor has been |
|
|
10339
|
Wed Aug 6 13:17:21 2014 |
ericq | Omnistructure | CDS | cdsutils: multifarious upgrades | I've checked out cdsutils-274 to /opt/rtcds/cdsutils,
and updated the /ligo/apps/ligoapps-user-env.sh
to have the newer machines use it by default. |
|
|
10338
|
Wed Aug 6 12:44:52 2014 |
Koji | Update | ASC | POP QPD signals | This is nice. Can we test this idea with
POP22 + a razor blade?
Just to take transfer functions in |
|
|
10337
|
Wed Aug 6 10:45:56 2014 |
Gabriele | Update | ASC | POP QPD signals | In addition to the simulation described
in my
previous elog, I simulated the signal |
|
|
10336
|
Wed Aug 6 10:10:45 2014 |
Harry | Update | General | Weekly Plan 8.6.14 | Last Week
Took first round of PER measurements |
|
|
10335
|
Wed Aug 6 00:14:10 2014 |
Jenne | Update | LSC | ALS is iffy tonight | The ALS system is iffy tonight.
After putting the cable back to the
RF spectrum analyzer (it had been taken to |
|
|
10334
|
Tue Aug 5 19:20:05 2014 |
Akhil | Update | General | PID loop Design for beat note stabilization | Today I and EricQ went inside the
lab and set up the cables running from the
a DAC channel into PZT input so that |
|
|
10333
|
Tue Aug 5 19:05:41 2014 |
Akhil | Update | General | Beat Note Testing on EPICS Channels | |
|
|
10332
|
Tue Aug 5 17:24:37 2014 |
Nichin | Update | Computer Scripts / Programs | PDFR update | The PDFR system now has the capability
to automatically run vectfit3.mat using a
wrapper script named vectorfitzpk.m |
|
|
10331
|
Mon Aug 4 22:52:03 2014 |
Jenne | Update | LSC | ALS alignment tweak-up | After aligning the arms to IR, I aligned
the Y green beam to the arm. Also,
the X green beatnote was very small, so I |
|
|
10330
|
Mon Aug 4 18:25:46 2014 |
Jenne | Update | General | Chronic Suspension Problems | Q is working on fixing the "save offsets"
script for the ASS, because that has lost
me my alignment two more times in the last |
|
|
10329
|
Mon Aug 4 17:30:00 2014 |
ericq | Update | General | Chronic Suspension Problems | TRX and TRY communication were recovered
by doing a simultaneous reboot of all of
the frontends. |
|
|
10328
|
Mon Aug 4 09:17:42 2014 |
Steve | Update | SUS | ITMX is still kicked |
|
|
|
10327
|
Sun Aug 3 23:47:56 2014 |
Koji | Update | General | Recovery efforts | It's great that you guys found the beam.
Yes, ITMX kick and lost communication |
|
|
10326
|
Sun Aug 3 17:19:32 2014 |
ericq | Update | General | Recovery efforts | [ericq, Jenne]
We both happened to come by today
to fix things up. |
|