| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
4661
|
Sun May 8 17:29:01 2011 |
rana | Update | IOO | MC beam spot centering | It seems like the best option would be
to make the MCASS just adjust the SUS biases
and center the beams on the suspended optics. |
|
|
4660
|
Sun May 8 16:32:52 2011 |
valera | Update | IOO | MC beam spot centering | Kiwamu told me that the CDS matrix
notation has changed and the 40m front end
code has changed since February. I changed |
|
|
4659
|
Sat May 7 18:08:54 2011 |
valera | Update | IOO | MC beam spot centering script | I tried to run the scripts/senseMCdecentering
to check the centering of the MC beam spots
on the mirrors. The script (csh) produces |
|
|
4658
|
Sat May 7 12:57:54 2011 |
Koji | Summary | General | aLIGO BBPD / Green PD investigation | The RF amplifier of the prototype BBPD
has been replaced from ERA-5SM to MAR-6SM. |
|
|
4657
|
Sat May 7 10:59:11 2011 |
Suresh | Update | RF System | RF Source filters changed |
The
SLP-50 filters which were on the 55 MHz lines |
|
|
4656
|
Sat May 7 02:52:53 2011 |
kiwamu | Update | LSC | TRY photo diode installed | [Suresh / Kiwamu]
We
installed the TRY photo diode (Thorlabs one) |
|
|
4655
|
Fri May 6 17:11:55 2011 |
steve | Update | SUS | SRM-oplev cable | The SRM qpd cable was removed from the
BS-table. It's path was changed from 1x4
to ITMY-table following the inner cable tray. |
|
|
4654
|
Fri May 6 15:59:40 2011 |
steve | Update | VAC | TP3 fore pump replaced | Dry fore pump of TP3 replaced by brand
new Varian SH-110 at 1.1 Torr_75,208
hrs |
|
|
4653
|
Fri May 6 15:42:55 2011 |
valera | Metaphysics | IOO | Input mode cleaner length and 11 MHz modulation frequency | After Kiwamu set the REFL11 phases
in the PRMI configuration (maximized PRM->REFL11I
reesponse) I tried to measure the MC length |
|
|
4652
|
Fri May 6 14:59:36 2011 |
Leo Singer | Configuration | SUS | Tuning ITMY bandstop | I tuned the ITMY bandstops -- 'before'
and 'after' spectra attached. Note
that the after the tuning, the bounce mode |
|
|
4651
|
Fri May 6 10:20:00 2011 |
steve | Summary | SAFETY | 2011 safety audit | The emphasis of this annual safety audit
was on safe electrical housekeeping
on March 3, 2011 |
|
|
4650
|
Fri May 6 06:36:18 2011 |
Suresh | Update | RF System | PD DC signals at each port connected | We now
have the DC signal from three PDs available
in the ADC channels 14,15 and 16. The |
|
|
4649
|
Fri May 6 01:27:12 2011 |
Koji | Summary | General | aLIGO BBPD / Green PD investigation | Minicircuits
ERA-5SM was used for the RF
amp of the BBPD. This amp is promising |
|
|
4648
|
Thu May 5 20:47:41 2011 |
Koji | Update | PSL | PMC aligned | The PMC exhibited the reduction of the
transmission, so it was aligned.
The misalignment was not the angle |
|
|
4647
|
Thu May 5 18:38:01 2011 |
rana | Summary | CDS | Sub-system TRAMP adjustments | I think
that the gain ramping time (_TRAMP) should |
|
|
4646
|
Thu May 5 17:19:21 2011 |
Leo Singer | Configuration | SUS | Tuning notch filters for bounce mode suspensions | I am tuning the notch filters for the bounce
modes in the suspensions, starting with the
ITMs and ETMs. I'll do the MCs, the |
|
|
4645
|
Thu May 5 16:11:22 2011 |
Jamie | Update | LSC | chans file for LSC |
|
|
|
4644
|
Thu May 5 15:33:37 2011 |
steve | Configuration | RF System | LSC rack | New right angle PVC front panel with SMA
bulkhead connectors are in place. The connections
are still lose. It is ready for Suresh to |
|
|
4643
|
Thu May 5 15:28:23 2011 |
kiwamu | Update | LSC | Re: MI locking : calibration of BS and ITMs actuators | They are the DC responses.
I put the resonant frequencies that |
|
|
4642
|
Thu May 5 15:26:52 2011 |
Leo Singer | Configuration | Computers | 'glue' installed on some control room computers | I installed 'glue' on Rossa, Allegra, and
Rosalba. This is a Python module that
includes a facility for LIGO_LW XML files. |
|
|
4641
|
Thu May 5 15:05:06 2011 |
steve | Update | PSL | PSL-FSS_RMTEMP is not back |
|
|
|
4640
|
Thu May 5 14:50:30 2011 |
Jenne | Update | LSC | chans file for LSC |
|
|
|
4639
|
Thu May 5 14:40:14 2011 |
Koji | Update | LSC | MI locking : calibration of BS and ITMs actuators | I've got confused
1) Are these the DC responses of
the coils? If that is true, we need to specify |
|
|
4638
|
Thu May 5 13:55:08 2011 |
kiwamu | Update | LSC | MI locking : calibration of BS and ITMs actuators | EDIT by
KI on 15/5/2011: |
|
|
4637
|
Thu May 5 13:14:15 2011 |
kiwamu | Update | LSC | chans file for LSC | Foton
doesn't correctly display the LSC filter
bank file : C1LSC.txt. |
|
|
4636
|
Thu May 5 13:13:32 2011 |
Jenne | Update | LSC | New RFPD screens are in | Joe helped me compile the lsc simulink
model, and now we have R&D phase rotation.
Right |
|
|
4635
|
Thu May 5 13:12:06 2011 |
Jenne | Update | PSL | Temperature drift, trying to shield PMC with foil | eeek. I've been running around
all day, so this is an incomplete elog.
I'll fill in more stuff in the next hour |
|
|
4634
|
Thu May 5 12:01:53 2011 |
Larisa Thorne | Configuration | Electronics | Jenne-Seismometer LPF project | Having finished the bulk of the work
for the LPF itself ( see here ),
I have begun trying to design the seismometer |
|
|
4633
|
Thu May 5 10:19:22 2011 |
steve | Update | PSL | PSL-FSS_RMTEMP is back | Valera and I installed the the temp sensor
and the interface box that Rana fixed. This
may help with diagnosing the PSL drift. |
|
|
4632
|
Thu May 5 04:38:20 2011 |
Koji | Summary | LSC | Comparison between S3399 and FFD-100 | Comparison between Hamamatsu S3399 and
Perkin Elmer FFD-100
These are the candidates for the |
|
|
4631
|
Thu May 5 00:08:59 2011 |
Jenne | Update | LSC | (Almost) New Screens for RFPDs | I modified C1LSC.mdl to use the CDSphase
blocks, which automatically calculate the
R and D phase rotation for us. Now |
|
|
4630
|
Wed May 4 17:32:06 2011 |
Larisa Thorne | Configuration | Electronics | Jenne-Seismometer LPF project | Building on what was posted previously
|
|
|
4629
|
Wed May 4 15:56:09 2011 |
valera | Summary | General | PSL and MC trends | The attached plot shows 2 day trends of
the PMC and MC reflected and transmitted
power, the PSL POS/ANG QPD signals, and the |
|
|
4628
|
Wed May 4 15:39:32 2011 |
Suresh | Update | RF System | RF Source Harmonics |
I have measured the RF source harmonics in |
|
|
4627
|
Wed May 4 15:22:39 2011 |
kiwamu | Update | | Re: Intermittent MC3 UL PD signal | I
went push all the possible connectors for
the MC3 shadow sensors including the SCSIs, |
|
|
4626
|
Wed May 4 13:57:04 2011 |
kiwamu | Update | SUS | mechanical resonances updated | [Leo w/ a little help from Kiwamu]
Leo
summarized the mechanical resonances of all |
|
|
4625
|
Wed May 4 13:51:51 2011 |
valera | Configuration | | Intermittent MC3 UL PD signal | The attached plot shows the 30 day trend
of the MC3 UL PD signal. The signal dropped
to zero at some point but now it is close |
|
|
4623
|
Wed May 4 13:45:56 2011 |
kiwamu | Update | LSC | locking last night | Last night I was trying to calibrate the
MICH error signal and the actuators on BS
and ITMs. |
|
|
4622
|
Wed May 4 12:07:48 2011 |
Suresh | Update | RF System | REFL55 installed on the AP table | REFL55
has been installed on the AP table.
REFL11 has been moved to make space for a |
|
|
4621
|
Wed May 4 11:48:01 2011 |
Suresh | Update | IOO | MC Locking not working | [Valera, Suresh]
The first time I noticed that the
MC was not locking was after I had finished |
|
|
4620
|
Tue May 3 18:46:06 2011 |
rana | Update | IOO | MC Locking not working | I found that the MC autolocker was OFF.
Kiwamu says he turned it off because its
slow. Suresh says that he has some feelings |
|
|
4619
|
Tue May 3 18:25:38 2011 |
kiwamu | Summary | LSC | PRMI locking : plan | [Rana/Jamie/Kiwamu]
Since we've got the PRMI locked
we now should be able to do more qualitative |
|
|
4618
|
Tue May 3 17:19:25 2011 |
kiwamu | Update | Electronics | Heliax connectors on 1Y2 rack : tightened | My observation wasn't accurate enough.
The
looseness came from the fact that the N-SMA |
|
|
4617
|
Tue May 3 16:47:55 2011 |
kiwamu | Update | LSC | PRMI locking : details | Here
are some details about the PRMI locking done
last night. |
|
|
4616
|
Tue May 3 16:20:13 2011 |
steve | Update | SUS | PRM & BS oplevs are ready |
|
|
|
4615
|
Tue May 3 15:59:22 2011 |
steve | Frogs | Photos | X-mas comes early | The little red all terrain cargo wagon
40" x 18" has just arrived
on pneumatic wheels. |
|
|
4614
|
Tue May 3 15:48:26 2011 |
Larisa Thorne | Update | Electronics | laser temperature control LPF, final version! | This is a continuation of this
The low pass filter is finally
acceptable, and its Bode graph is below (on |
|
|
4613
|
Tue May 3 15:04:20 2011 |
kiwamu | Update | SUS | Re: DRMI prep : suspension diagnostic | Jenne went through all the suspension racks
and pushed all the connectors.
After pushing them, we had a quick |
|
|
4612
|
Tue May 3 14:35:44 2011 |
Larisa Thorne | Configuration | Electronics | Jenne-Seismometer LPF project | I was charge with making a Non-Inverting
Op Amp Low Pass Feedback circuit for Jenne,
which may somehow be integrated into a seismometer |
|
|
4611
|
Tue May 3 13:22:13 2011 |
Leo | Update | SUS | Re: DRMI prep : suspension diagnostic | Here are the free-swinging spectra for
the BS, ETMX, ETMY, ITMX, ITMY, MC1, MC2,
MC3, and PRM chambers. Kiwamu left |
10x |