| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17530
|
Wed Mar 29 19:19:41 2023 |
Koji | Update | ALS | X end green now indefinitely locking | Stable
lock of the X End green laser was recovered.
- The biggest issue |
6x |
|
17531
|
Thu Mar 30 09:51:41 2023 |
Paco | Update | ALS | XALS / YALS power normalized and noise spectra | After the XAUX - XARM lock was recovered
the C1:ALS-TRX_GAIN was set from 0.002 to
0.0006 to normalize the green transmission |
|
|
17540
|
Tue Apr 11 19:46:45 2023 |
Radhika | Update | ALS | X end green now indefinitely locking | I measured the OLTF of the XAUX-PDH loop
[Attachment 1] now that the green laser is stably
locking. I injected an excitation (100mVpp) |
|
|
17543
|
Thu Apr 13 11:38:50 2023 |
Anchal | Update | ALS | Moku Phasemeter calibration | I calibrated the moku phasemeter setup
for reading beatnote fluctuations today.
The calibration is referred to the DFD output |
|
|
17544
|
Thu Apr 13 17:58:16 2023 |
Paco | Update | ALS | Moku Phasemeter calibration and ALS noise | Ditto of 40m/17543
but for XBEAT >> Calibrated to 0.3061 +/- |
|
|
17545
|
Fri Apr 14 07:31:28 2023 |
JC | Update | General | Accelerometer for Tours | I was able to get this accelerometer going
for the next Lab tours. I want to get this
guy up on a big screen to give people a nice |
|
|
17547
|
Tue Apr 18 19:29:43 2023 |
yuta | Update | BHD | LO phase noise measurements in ITMX single bounce, MICH and FPMI | [Anchal, Yuta]
We have repeated LO phase noise measurement |
|
|
17548
|
Wed Apr 19 09:52:50 2023 |
Radhika | Update | NeuralNet | Rayleigh spectrograms | Attached are the Rayleigh spectrograms
of the error/control signal channels associated
with the NN nonlinear control of IMC |
6x |
|
17549
|
Wed Apr 19 11:35:20 2023 |
Yehonathan | Update | BHD | PRMI estimated noise budget | First, simple stuff. We estimate the noise
budget with total input and output noises.
Later, we will break it down (ADC, DAC, whitening, |
|
|
17552
|
Wed Apr 19 17:32:11 2023 |
Alex | Update | IMC | Beam offset calculation for MC1,2,3 from dither results | Today, we ran dither lines on the MC1,2,3
mirrors in YAW from 136598007
to 1365981967 and similarly |
|
|
17553
|
Wed Apr 19 22:46:17 2023 |
Paco | Update | ALS | DFD demod normalized by amplitude | [Anchal, Paco]
We updated the LSC model to use
the amplitude as a normalization (analogous |
|
|
17554
|
Thu Apr 20 12:00:34 2023 |
rana | Update | ALS | DFD demod normalized by amplitude | how about the other idea of downloading
the I & Q channels and doing the analysis
offline? I'm curious if its better or |
|
|
17555
|
Thu Apr 20 23:51:14 2023 |
Anchal | Update | ALS | DFD demod normalized by amplitude | I did offline analysis with the available
data. We were only saving signals at 2048
Hz rate, so analysis can not be done on 1.4 |
|
|
17556
|
Fri Apr 21 14:31:26 2023 |
Anchal | Update | ALS | DFD demod normalized by amplitude | Last night I took ITMY calibration data
using MICH with AS55_Q. Adding that to the
same plot. The error bars are probably underestimate |
|
|
17558
|
Mon Apr 24 10:53:39 2023 |
Alex | Update | General | Summary Pages Fixed | This morning I found a helpful post in
the git.ligo pages that referred to the issue
that was stopping the summary pages from |
|
|
17559
|
Mon Apr 24 18:33:22 2023 |
Alex | Update | IMC | Beam offset movement for MC1,2,3 in PIT and YAW from dither results | Mayank and I worked on finalizing the plots
for the beam offset from the dithering test
done in 17552. |
|
|
17561
|
Tue Apr 25 15:51:21 2023 |
Jc | Update | IMC | IMC has been tripping | It has happened multiple times today that
IMC has tripped on its own. Yehonathan and
I have had to come back to manually lock |
|
|
17562
|
Tue Apr 25 17:06:17 2023 |
Anchal | Update | ALS | DFD demod normalized by amplitude | I modified the analysis to correct for
any affects due to Anti-Aliasing or Anti-Imaging
filters, and I also found a insignificant |
|
|
17563
|
Tue Apr 25 21:21:03 2023 |
Yehonathan | Update | BHD | Dewhitening noises | {Mayank, Paco, Yehonathan}
Dewhitening noise curves were taken
using SR785+SR560 for the PRMI noise budget. |
|
|
17564
|
Wed Apr 26 09:37:10 2023 |
Paco | Update | BHD | IQ demod board gains for REFL11 and AS55 | We
measured the IQ demodulation board gains
for REFL11 and AS55. |
|
|
17566
|
Wed Apr 26 12:05:10 2023 |
Radhika | Update | ALS | XEND green PDH controller | Tl;dr:
Tried to replace of XEND green PDH servo
controller with Moku template IIR filter, |
|
|
17567
|
Wed Apr 26 12:59:42 2023 |
Yehonathan | Update | BHD | Updated noise budget with output electronics | I included the output electronic noises
into the PRMI carrier noise budget (attachment
1). |
|
|
17568
|
Wed Apr 26 18:41:56 2023 |
Paco | Update | OPLEV Tables | ITMX oplev laser died | [Paco, Koji, Mayank]
We replaced ITMX Oplev |
|
|
17570
|
Fri Apr 28 18:40:49 2023 |
Yehonathan | Update | BHD | Updated noise budget with some input electronic noises | {Mayank, Yehonathan}
Yesterday, we measured AS55 and
REFL11 dark noises at the IQ demod boards |
|
|
17579
|
Wed May 3 12:11:52 2023 |
Yehonathan | Update | BHD | Updated noise budget with measured noise and OLTF | {Paco, Yehonathan, Yuta}
Paco and Yuta locked PRMI carrier
and I took the MICH OLTF measurement (attachment |
|
|
17582
|
Wed May 3 18:40:50 2023 |
Yehonathan | Update | BHD | Whitening noises measurements | {Mayank, Yehonathan}
We measured the noise at the WF1
(REFL11) and WF2 (AS55) boards at the LSC |
|
|
17584
|
Mon May 8 17:05:30 2023 |
Yehonathan | Update | BHD | Whitening TF measurements | {Mayank, Yehonathan}
We measured today the TFs of the
whitening boards. We measured in particular |
|
|
17585
|
Tue May 9 11:32:04 2023 |
Yehonathan | Update | BHD | Whitening TF measurements | We forgot to take a reference TF measurement
by looping the SR785 on itself using the
same BNC cables used for the actual measurement. |
|
|
17586
|
Tue May 9 12:06:35 2023 |
Radhika | Update | ALS | XEND green PDH controller | [Mayank, Radhika]
I retook a transfer function measurement
of the uPDH servo closed-loop (using the |
|
|
17587
|
Tue May 9 21:02:55 2023 |
Radhika | Update | ALS | XEND green PDH controller | XAUX
laser locked with Moku:Go controller
The analog zeros and poles used |
|
|
17588
|
Wed May 10 11:49:34 2023 |
Yehonathan | Update | BHD | Updated PRMI AS55+REFL11 noise budget | I
added input noises and angle to length coupling
to the noise budget. |
|
|
17589
|
Wed May 10 17:11:34 2023 |
Paco | Update | ASC | FPMI differential ASC - I | I
began commissioning the AS WFS for (PR)FPMI
configurations |
|
|
17590
|
Thu May 11 12:05:24 2023 |
rana | Update | BHD | Updated PRMI AS55+REFL11 noise budget | Is the A2L coming from the optical lever
feedback? If so, we can make a 30 Hz ELP
to cut it off by 60 Hz. |
|
|
17591
|
Sat May 13 11:37:41 2023 |
rana | Update | General | StripTool -> NDscope: PSL on wall | As a test, I have replaced the PSL StripTool
on the north wall of the control room with
a nearly equivalent NDScope display. It is |
|
|
17593
|
Tue May 16 08:42:14 2023 |
Paco | Update | ASC | FPMI differential ASC - II | We
aligned the AS WFS and measured some angular
motion from ETMX |
|
|
17594
|
Wed May 17 12:09:11 2023 |
Yehonathan | Update | Electronics | Preping for new coil drivers commissioning in 1X4 | It's time to start commissioning the
new coil drivers. The Acromag box is already
there but it needs to be modified. |
|
|
17595
|
Fri May 19 09:23:58 2023 |
Paco | Update | | MCF Noise | The fan behind the
PSL controller is injecting excess band limited |
|
|
17597
|
Fri May 19 13:25:03 2023 |
Koji | Update | PSL | MCF Noise | This is super! And now is the time to replace
the internal fan!
|
|
|
17598
|
Fri May 19 15:25:00 2023 |
Mayank | Update | PSL | PSL tripped - removed internal fans | We removed the PSL
controller internal (broken) fans after it |
|
|
17600
|
Wed May 24 13:19:28 2023 |
Paco | Update | BHD | BH44 and BH55 dc transimpedance modified | We lowered the BH44
and BH55 DC transimpedances to ~ 50 V/A |
|
|
17601
|
Wed May 24 17:36:25 2023 |
Paco | Update | BHD | BH44_I content and PRC alignment | BH44
is sensitive to PRC alignment noise
[Paco, Yuta] |
|
|
17603
|
Thu May 25 14:40:03 2023 |
Paco | Update | Calibration | Measured the PSL wavelength | The PSL wavelength
is 1064.5068 +- 0.0015 nm |
|
|
17605
|
Fri May 26 15:04:12 2023 |
JC | Update | PSL | PSL Fans Replaced | We Changed
The Fans on the PSL
To
start, the part Koji ordered is 259-1818-ND |
|