| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
7712
|
Wed Nov 14 13:58:18 2012 |
Jenne | Update | IOO | Turn off MCL path before doing MC spot measurement |
|
|
|
7713
|
Wed Nov 14 21:59:09 2012 |
Den | Update | CDS | daq errors | I tried to add a test point to C1MCS model
and spent next two hours rebooting front-ends,
restarting models and realigning MC. |
|
|
7714
|
Thu Nov 15 02:18:24 2012 |
Den | Update | Modern Control | BS oplev | I've applied LQR feedback technique to
BS oplev in pitch. I think the most inconvenient
thing in using LQR controller is the amount |
|
|
7715
|
Thu Nov 15 03:09:08 2012 |
Jenne | Update | Alignment | No good progress, many options | I didn't make any concrete progress today.
AS and REFL cameras are in place, and Manasa
has put ND 0.5 filters on both. I used a |
|
|
7716
|
Thu Nov 15 21:52:48 2012 |
Den, Ayaka | Update | Green Locking | yarm locked | We aligned and locked Y arm for green:
installed camera on PSL
to monitor green transmission
aligned |
|
|
7717
|
Fri Nov 16 00:08:36 2012 |
Koji | Update | SUS | MC2 woes | People complained about the MC instability:
If
we aligned the MC, it locked nicely for a |
|
|
7718
|
Fri Nov 16 03:12:39 2012 |
Ayaka, Den | Update | Green Locking | xarm locked | We aligned and locked xarm for green.
|
|
|
7719
|
Fri Nov 16 09:57:57 2012 |
Jenne | Update | Green Locking | xarm locked |
|
|
|
7720
|
Sat Nov 17 03:30:13 2012 |
Den, Ayaka | Update | Alignment | red in arms | We aligned accurately 00 green in yarm,
changed voltage on PZT2 to see red flashing
at TRY at the normalized level 0.2-0.3. The |
|
|
7721
|
Sat Nov 17 18:02:14 2012 |
Den | Update | Alignment | red in arms |
|
|
|
7722
|
Sat Nov 17 22:50:17 2012 |
Koji | Update | Alignment | red in arms | You have constraints for the IR beams (i.e.
one PZT and one BS for 8 dofs), so now you
need to align the arms for the input IR beams. |
|
|
7723
|
Mon Nov 19 15:12:52 2012 |
Jenne | Update | Alignment | Yarm locked IR |
|
|
|
7724
|
Mon Nov 19 15:15:22 2012 |
Jenne | Update | SUS | All oplev gains turned on |
|
|
|
7725
|
Mon Nov 19 15:58:02 2012 |
Steve | Update | SAFETY | safety training | Charles Blakemore our new undergrad
help received 40m specific safety training
today. |
|
|
7729
|
Mon Nov 19 23:14:31 2012 |
Evan | Update | Cameras | ETMYF focus | Adjusted focus on ETMYF camera so that
the IR beam is in focus. |
|
|
7730
|
Tue Nov 20 02:57:24 2012 |
Ayaka, Den, Koji | Update | Locking | red in arms | We aligned and locked x and y arms.
MCL loop makes arms lock unstable,
adds a lot of noise at frequencies 60-100 |
8x |
|
7732
|
Tue Nov 20 15:11:22 2012 |
Steve | Update | General | few more sensing cards | New Lumitek IR
Sensor Cards are here. We got 2 pieces
of Q-11-T (2" x 2"), 2 pieces of |
|
|
7733
|
Tue Nov 20 15:24:52 2012 |
Ayaka | Update | PEM | Seismometers and a microphone | I got two seismometers and one microphone
back from Tara.
They are now near the Gurlap under |
|
|
7734
|
Tue Nov 20 16:03:37 2012 |
janosch | Update | PEM | Seismometers and a microphone |
|
|
|
7735
|
Tue Nov 20 20:37:51 2012 |
Koji | Update | IOO | MC autolocker | Last night I found that the MC autolocker
has not been updated since the chamber was
closed. |
|
|
7736
|
Wed Nov 21 01:31:37 2012 |
Koji, Ayaka | Update | Locking | alignment on ETMX table | Since the transmission beam on ETMXT camera
seemed to be clipped, we checked the optics
on ETMX table. |
|
|
7737
|
Wed Nov 21 01:36:36 2012 |
Koji | Update | IOO | MCL disabled / WFS clear history restored | As MCL is disturbing arm locking by injecting
a lot of noise, I have modified 'mcup'
to disable MCL |
|
|
7738
|
Wed Nov 21 21:06:13 2012 |
Ayaka | Update | LSC | calibration of arms | Motivation
In order to estimate whether we can
see acoustic coupling in arms or not, we |
7x |
|
7739
|
Sat Nov 24 13:58:07 2012 |
rana | Update | LSC | calibration of arms | For the loop diagnosis, its best
to use the method of "IN1/IN2",
rather than manipulate the close loop gain. |
|
|
7740
|
Sat Nov 24 22:14:08 2012 |
Koji | Update | General | AP table cleaning up | On Wednesday (21st) night, I checked the
AP table as I wanted to try PRMI locking.
It was difficult to work with the |
|
|
7741
|
Sat Nov 24 23:50:35 2012 |
Koji | Update | IOO | MC WFS refusing to work | Today I found the IMC was misaligned significantly
by WFS feedback.
Once the feedback was cleared, it |
|
|
7743
|
Mon Nov 26 10:42:06 2012 |
Ayaka | Update | LSC | calibration of arms | I uploaded a zip file that contains data
files used for the calibration.
OLTF_x/y.txt: the open loop transfer |
|
|
7744
|
Mon Nov 26 10:58:20 2012 |
Steve | Update | PEM | air cond maitenance tomorrow | Air conditioning maintenance is scheduled
for tomorrow morning till noon. |
|
|
7745
|
Mon Nov 26 18:36:17 2012 |
Jenne | Update | PEM | BLRMS back |
|
|
|
7748
|
Mon Nov 26 23:45:52 2012 |
Ayaka | Update | IOO | Tuning MC_L | [Rana, Jamie, Ayaka]
We could not lock the arms with MC_L
loop on. Therefore we measured the change |
|
|
7750
|
Tue Nov 27 00:45:20 2012 |
jamie | Update | IOO | MC_L and laser frequency noise spectra | I grabbed the a plot of the iLIGO PSL frequency
noise spectrum from the Rana manifesto:
|
|
|
7751
|
Tue Nov 27 01:03:42 2012 |
Ayaka | Update | WienerFiltering | Sound on PSL | Last Thursday, I put the speaker
and my laptop in the PSL table, and make
triangular wave sound with the basic frequency |
|
|
7752
|
Tue Nov 27 03:26:00 2012 |
Jenne | Update | General | POP beam on POP55, POP camera |
|
|
|
7753
|
Tue Nov 27 09:44:09 2012 |
Steve | Update | VAC | pumpdown at 15 days | It took 15 days to reach 1e-5 Torr
The RGA was turned on yesterday.
The rga scan plotting was not working. Den |
|
|
7754
|
Tue Nov 27 11:27:22 2012 |
Steve | Update | PEM | particle count is going up |
Jeff is still working on the filter banks. |
|
|
7755
|
Tue Nov 27 17:45:42 2012 |
Steve | Update | General | spare optics of AP table moved to cabinet | Spare optics from the AP table were moved
to glass cabinet in the east arm. I'm not
sure this is the right place. We'll see what |
|
|
7756
|
Tue Nov 27 19:06:16 2012 |
Riju | Update | | Testing AG4395A+GPIB | I ve tested another bandpass filter
today with similar set-up. This time I took
the data with corrected reference level. |
|
|
7759
|
Wed Nov 28 23:18:35 2012 |
Charles | Update | PEM | Decreased RMS in Seismometers | The attached plots display RMS noise from
various accelerometers and seismometers over
the past 90 days. One can see how after the |
|
|
7760
|
Wed Nov 28 23:55:13 2012 |
Ayaka | Update | WienerFiltering | Sound on PSL | I have been searching for the way
we can subtract signal better since I could
see the acoustic coupling signal remains |
|
|
7761
|
Thu Nov 29 00:15:13 2012 |
Den, Koji | Update | IOO | MC WFS work |
|
|
|
7762
|
Thu Nov 29 02:43:48 2012 |
Ayaka | Update | PEM | Decreased RMS in Seismometers |
|
|
|
7763
|
Thu Nov 29 09:58:06 2012 |
Den | Update | PEM | Decreased RMS in Seismometers |
|
|
|
7764
|
Fri Nov 30 02:40:44 2012 |
Den | Update | Adaptive Filtering | YARM | I've applied FIR adaptive filter to YARM
control. Feedback signal of the closed loop
was used as adaptive filter error signal |
|
|
7766
|
Fri Nov 30 11:38:35 2012 |
Steve | Update | PSL | foil removed from enclosure | Aluminum foil replaced by sheet metal on
Enclosure and AP table. |
|
|
7767
|
Fri Nov 30 11:49:24 2012 |
Koji | Update | Adaptive Filtering | YARM | This is interesting. I suppose you are
acting on the ETMY.
Can you construct the compensation |
|
|
7769
|
Fri Nov 30 22:11:50 2012 |
Den | Update | Adaptive Filtering | ARMS |
|
|
|
7770
|
Fri Nov 30 23:10:36 2012 |
Charles | Update | Electronics | Vertex Illuminators | 3 of the 4 remote controlled illuminators
at the vertex are installed and can now be
turned on via sitemap. There are a total |
|
|
7771
|
Sat Dec 1 00:13:16 2012 |
Den | Update | Adaptive Filtering | ARMS and MC |
|
|
|
7772
|
Sat Dec 1 00:24:37 2012 |
Den, Ayaka | Update | Alignment | BS chamber | Today at 11:13 AM the stack of invacuum
BS table was kicked and IFO misaligned. We
adjusted PZT2 voltage by ~20 V in yaw such |
|
|
7773
|
Sat Dec 1 13:56:38 2012 |
rana | Update | Alignment | BS chamber |
Whoever was working
around the BS chamber at 11 AM on Friday |
|