| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8400
|
Wed Apr 3 14:45:34 2013 |
Jamie | Update | Computers | updated EPICS database (channels selected for saving) |
|
|
|
8401
|
Wed Apr 3 14:46:17 2013 |
Gabriele | Summary | LSC | Error signal simulation in PRMI | Here is a summary of a simulation of the
error signal behavior in the PRMI configuration.
The main parameters are: |
14x |
|
8402
|
Wed Apr 3 15:00:24 2013 |
Jamie | Summary | Electronics | Sorensen supplies in LSC rack (1Y2) | I investigated the situation of the two
Sorensen supplies in the LSC rack (1Y2).
They are there solely to supply power to |
|
|
8403
|
Wed Apr 3 16:03:59 2013 |
Chloe | Update | | QPD Voltage Regulators | The voltage regulator on the QPD breadboard
seems to be having problems... yesterday
Eric helped me debug my circuit and discovered |
|
|
8404
|
Wed Apr 3 17:40:18 2013 |
Jamie | Configuration | Electronics | putting together a 110 MHz LSC demod board | I started to look into putting together
a 110 MHz demod board to be used as POP110
(see #8399). |
|
|
8405
|
Wed Apr 3 18:22:00 2013 |
Jenne | Update | Electronics | POP110 re-implemented | I have re-implemented POP110. The
cable coming from the AS110 diode is disconnected,
labeled, and sitting in the cable tray next |
|
|
8406
|
Wed Apr 3 18:27:03 2013 |
Koji | Update | | QPD Voltage Regulators | Breadboards may not be suitable for a reliable
work. Why don't you switch to any protoboard
and real soldering? |
|
|
8407
|
Wed Apr 3 18:41:22 2013 |
Jamie | Configuration | Electronics | putting together a 110 MHz LSC demod board | This SCPQ-150+,
which is surface mount, might also work in
place of the PSCQ-2-120, which is through-mount. |
|
|
8408
|
Wed Apr 3 19:01:06 2013 |
Albert | Update | optical tables | Optical Table Toolboxes Update |
|
|
|
8409
|
Wed Apr 3 22:26:51 2013 |
rana | Configuration | Electronics | putting together a 110 MHz LSC demod board | For the 110 MHz demod boards, we
would ideally have a plugin bandpass filter.
If you have some specs in mind, you can email |
|
|
8410
|
Wed Apr 3 23:22:20 2013 |
rana | Update | optical tables | Optical Table Toolboxes Update | There are some tips for how to appy
nail polish on YouTube from MKNails and MissJenFABULOUS.
Their tips on how to prepare the site for |
|
|
8411
|
Thu Apr 4 10:12:55 2013 |
Gabriele | Summary | LSC | POP22 and POP110 | I had a look at the POP110 signal, with
the PRMI flashing.
1) The LSCoffset script does not |
|
|
8412
|
Thu Apr 4 10:32:42 2013 |
Gabriele | Summary | LSC | REFL55 error signals | The attached plot shows that also the behaviour
of the REFL11 and 55 signals is qualitatively
equal to the simulation outcome. |
|
|
8413
|
Thu Apr 4 10:46:54 2013 |
Koji | Summary | LSC | REFL55 error signals | Beautiful double peaks. I don't see the
triple zero-crossings. Is this because you
adjusted the phase correctly (as predicted)? |
|
|
8414
|
Thu Apr 4 13:39:12 2013 |
Max Horton | Update | Summary Pages | Graph Limits | Graph Limits: The limits on graphs
have been problematic. They often reflect
too large of a range of values, usually because |
|
|
8415
|
Thu Apr 4 14:37:15 2013 |
Jamie | Configuration | Electronics | putting together a 110 MHz LSC demod board | I'm having Steve order the following:
2x SXBP-100+
2x SCLF-135+ |
|
|
8416
|
Thu Apr 4 17:23:05 2013 |
Steve | Update | 40m Upgrading | ETMY optical table & enclosure is ready for optics |
|
|
|
8417
|
Fri Apr 5 01:18:34 2013 |
Manasa | Update | 40m Upgrading | Not a fan of the new plastic box yet |
|
|
|
8418
|
Fri Apr 5 01:28:56 2013 |
Manasa | Update | 40m Upgrading | Endtable upgrade for auxiliary green laser : populating the table | I started populating the end table; the
TRY path to start with. I found that I need
to redo the cables/electronics layout around |
|
|
8419
|
Sat Apr 6 09:21:36 2013 |
rana | Update | 40m Upgrading | Not a fan of the new plastic box yet |
1) We still need to drill and
install the thumbscrew latches |
|
|
8420
|
Sun Apr 7 20:49:19 2013 |
Zach | Update | General | Restarted elog | with the script, as it was down. |
|
|
8421
|
Mon Apr 8 08:05:41 2013 |
Steve | Update | PSL | PMC locked | The PMC locked manually. MC grabbed
lock instantaniously |
|
|
8422
|
Mon Apr 8 10:19:46 2013 |
Jenne | Update | PSL | LSC left enabled |
Note: The TRY PD isn't installed
and normalized properly yet, so the IFO OVERVIEW |
|
|
8423
|
Mon Apr 8 16:37:26 2013 |
Steve | Update | 40m Upgrading | ETMY enclosure wall transmission |
Enclosure cover #1 transmission
measured in 1064 nm, 156 mW, |
|
|
8424
|
Mon Apr 8 22:43:44 2013 |
rana | Update | PSL | MC locking troubles: MC/FSS servo unstable | The MC seemed to be losing lock recently
quite a bit. I noticed that the PC Drive
RMS signal was red. |
|
|
8425
|
Tue Apr 9 00:15:18 2013 |
Manasa | Update | 40m Upgrading | Endtable upgrade for auxiliary green laser : populating the table | [Den, Annalisa, Manasa]
The Alberto laser was moved from the |
|
|
8426
|
Tue Apr 9 00:32:39 2013 |
rana | Configuration | IOO | Turn on MCL | Listening to the free swinging Y-arm,
its clear that the fringe velocity is higher
with the MCL path off, than on. I checked |
|
|
8427
|
Tue Apr 9 00:32:57 2013 |
Manasa | Update | 40m Upgrading | Endtable upgrade for auxiliary green laser : TRY temporarily in place | The TRY path on the end table is temporarily
in place to help IFO locking.
The Y arm transmission was steered |
|
|
8428
|
Tue Apr 9 01:46:40 2013 |
Zach | Update | General | Restarted elog | Again.
|
|
|
8429
|
Tue Apr 9 07:48:10 2013 |
Steve | Update | PSL | PMC locked |
|
|
|
8430
|
Tue Apr 9 08:37:54 2013 |
Steve | Update | 40m Upgrading | Endtable upgrade for auxiliary green laser : TRY temporarily in place |
|
|
|
8431
|
Tue Apr 9 14:55:13 2013 |
Jamie | Update | CDS | overbooked test points cause of DAQ problems | Folks were complaining that they were getting
zeros whenever they tried to open fast channels
in DTT or Dataviewer. It turned out |
|
|
8432
|
Tue Apr 9 21:27:48 2013 |
Jenne | Update | 40m Upgrading | TRY temporarily in place |
|
|
|
8433
|
Wed Apr 10 01:10:22 2013 |
Jenne | Update | Locking | Configure screen and scripts updated | I have gone through the different individual
degrees of freedom on the IFO_CONFIGURE screen
(I haven't done anything to the full IFO |
|
|
8434
|
Wed Apr 10 03:59:41 2013 |
Den | Configuration | IOO | Turn on MCL |
|
|
|
8435
|
Wed Apr 10 07:37:33 2013 |
Steve | Update | PSL | PMC locked |
|
|
|
8436
|
Wed Apr 10 14:25:04 2013 |
Manasa | Update | 40m Upgrading | Endtable upgrade for auxiliary green laser : LWE Alberto laser beam profile | I measured the beam profile of the Alberto
laser (that will be the ETMY end laser) as
I found the data inconsistent with the measurements |
|
|
8437
|
Wed Apr 10 15:49:22 2013 |
Annalisa | Configuration | COMSOL Tips | Yend table eigenfrequency simulation with COMSOL | I made a Simulation with COMSOL for
the Yend table. Mainly, I tried to see how
the lower eigenmode changes with the number |
|
|
8438
|
Thu Apr 11 02:00:21 2013 |
Jenne | Update | Locking | TRY gone??? | TRY
signals are all gone! Both
the PD and the camera show no signal. |
|
|
8439
|
Thu Apr 11 02:49:18 2013 |
Den | Update | Locking | PRCL on carrier | Jenne, Den
We suspect PRM shows significant
length to angle coupling due to large oplev |
|
|
8440
|
Thu Apr 11 03:23:12 2013 |
Den | Update | General | MCL threshold | MC down script is too slow to block MC_L
when the cavity goes out of lock. As a result
the loop strongly kicks MC2. We decided to |
|
|
8441
|
Thu Apr 11 03:25:29 2013 |
Jenne | HowTo | SUS | Idea for how to properly balance SUS actuators | We have calibrated the overall actuators of
each suspension independent of the optical
levers. So, we know how much we are
|
|
|
8442
|
Thu Apr 11 03:38:40 2013 |
Den | Update | Locking | angular motion | Spectra of BS, PRM, ITMX, ITMY are attached
with oplevs ON and OFF (in units of urad).
Loops reduce RMS from ~2urad to ~0.3urad |
|
|
8443
|
Thu Apr 11 10:15:55 2013 |
Steve | Update | Locking | PRM yaw oplev transferfunction | See Feb
2012 PRM yaw transferfunctions, also
check Valera's modified side |
|
|
8444
|
Thu Apr 11 11:58:21 2013 |
Jenne | Update | Computers | LSC whitening c-code ready | The big
hold-up with getting the LSC whitening
triggering ready has been a problem with |
|
|
8445
|
Thu Apr 11 16:29:23 2013 |
Albert | Update | optical tables | Optical Table Toolboxes Update |
|
|
|
8446
|
Fri Apr 12 02:56:34 2013 |
Den | Update | Locking | prcl angular motion | I compared PCRL and XARM angular motions
by misaligning the cavities and measuring
power RIN. Divergence angles for both cavities |
|
|
8447
|
Fri Apr 12 09:20:32 2013 |
rana | Update | Locking | prcl angular motion | How
is the cavity g-factor accounted for in this |
|
|
8448
|
Fri Apr 12 10:33:42 2013 |
Charles | Summary | ISS | DC-Coupled ISS Servo Design | General ISS Design
Signals
through the ISS are directed as follows: |
|
|
8449
|
Fri Apr 12 13:21:34 2013 |
Den | Update | Locking | prcl angular motion |
|
|