ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
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, |
 |
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 |
  |
17615
|
Fri Jun 2 17:01:20 2023 |
Reuben | Update | ALS | Getting comfortable with the ALS | [Reuben, Radhika]
Checked out the AUX PDH locking
system at the XARM. Started by locking the |
 |
17652
|
Thu Jun 22 23:09:32 2023 |
Koji | Update | ALS | X end green beam alignment | [Hiroki, Mayank, Ruben, Koji]
As we expected that the X-end PZT
steerers takes more times to be recovered, |
|
17653
|
Fri Jun 23 00:29:16 2023 |
Reuben | Update | ALS | Efforts to align the cavity mirrors | Earlier in the morning I tried to align
the green laser of the X-arm. It was an attempt
to see if green transmission can be brought |
|
17654
|
Fri Jun 23 01:32:46 2023 |
Reuben | Update | ALS | Taking frequency response of the Y arm green laser PDH controller | (Tuesday, Jun 20, 2023)
While the X end hardware was being
updated, I decided to take an open loop transfer |
|
17690
|
Mon Jul 17 17:52:04 2023 |
Reuben | Update | ALS | Tabletop setup | I wrote a Python code to simulate the AUX
laser stabilisation system. It takes the
poles and zeroes of the individual components |
   |
17694
|
Tue Jul 18 15:57:55 2023 |
Reuben | Update | ALS | I was able to lock the XEND green laser using Moku:Go digital filter. | I was able to use the Moku:Go to implement
a digital controller and substitute the analog
pdh box to lock the green laser at x end. |
|
17699
|
Wed Jul 19 21:28:27 2023 |
Reuben | Update | ALS | Locked XEND green laser with high transmission | Wanted to see if digital filter on the
Moku:Go can be changed without breaking lock.
Loading different filter files broke lock. |
 |
17700
|
Wed Jul 19 22:51:47 2023 |
rana | Update | ALS | Tabletop ALS-Moku controller setup | Too many cavity poles! It should be just
a single pole. Please show us your OLG Bode
plot on the same plot as each of the individual |
|
17705
|
Thu Jul 20 22:24:59 2023 |
Reuben | Update | ALS | Tabletop ALS-Moku controller setup |
Here are the transfer functions
of the individual components along with the
OLTF. |
 |
17720
|
Thu Jul 27 00:29:13 2023 |
Reuben | Update | ALS | OLTFS of digital controller | The OLTFS of AUX locking system when locked
with the PDH box, and Moku:Go and Moku:Pro
running a similar filter as that of the PDH |
7x |
17723
|
Thu Jul 27 10:43:58 2023 |
Koji | Update | ALS | OLTFS of digital controller | Wow, this is awesome. Can you plot the
comparison between the measured and expected
OLTFs for both (or either) Moku cases? |
|
17728
|
Thu Jul 27 18:21:33 2023 |
Koji | Update | ALS | OLTFS of digital controller | Here is the OLTF from the model of the
system I made in Python. https://github.com/CaltechExperimentalGravity/LaserStabilization/blob/main/code/PlantSim/plant_model.py
|
|
17774
|
Thu Aug 10 19:52:47 2023 |
yuta | Summary | ALS | simultaneous hold and release of the arm (aka two arm ALS) | I just wanted to take the same time series
data I took back in 2012 (40m/6874).
ALS noise look much better than 2012, |
|
17897
|
Wed Oct 11 22:57:11 2023 |
Paco | Update | ALS | On the residual frequency dependence of the ALS DARM calibration with FPMI | [Paco, Yuta]
Attachment #1 shows
tonights OOL ALS noises with the PSL hepa |
 |
2
|
Thu Oct 18 14:52:35 2007 |
rana | Routine | ASC | test | [B]test[/B]
[LINE]X-(:P;(:)) |
|
168
|
Wed Dec 5 18:08:36 2007 |
Andrey | Update | ASC | Optical Lever laser for ETMX is installed |
A new laser with \lambda=633nm has been intalled
and the mirror adjusted so that the signal |
|
253
|
Tue Jan 22 13:11:03 2008 |
tobin | Update | ASC | ETMY oplev recentered | The light wasn't even on the diode. |
|
469
|
Thu May 8 01:50:25 2008 |
rana | Summary | ASC | Arm Cavity HOM Resonances | Nothing new, but I calculated the frequencies
of the first 22 higher order transverse modes
and thought I might as well list them here.
|
|
1178
|
Fri Dec 5 01:58:58 2008 |
Yoichi | Configuration | ASC | tdscntr.pl now works at 40m | Tobin gave me the perl version of tdscntr
some time ago.
Pinkesh and I modified and tested it at LHO.
|
|
1210
|
Thu Jan 1 00:55:39 2009 |
Yoichi | Update | ASC | Alignment scripts for Linux | A Happy New Year.
The dither alignment scripts did not run |
|
1237
|
Mon Jan 19 13:58:53 2009 |
Yoichi | Update | ASC | Better ditherServo.pl | Nick Smith (@LHO) tested the ditherServo.pl
at Hanford.
He added options to specify exit conditions |
|
1412
|
Fri Mar 20 12:07:19 2009 |
Yoichi | Configuration | ASC | ETMY beam centering | I forgot to put this in the elog.
Last Sunday night, I centered the beam on
the ETMY because it was too low.
|
|
1595
|
Sun May 17 21:45:40 2009 |
rob | Update | ASC | ITMX oplev centered | |
|
2105
|
Fri Oct 16 16:08:00 2009 |
rob | Configuration | ASC | loop opened on PZT2 YAW at 3:40 pm | I pushed the "closed loop" button
on PZT2 YAW around 3:40 pm today, then roughly
recentered it using the DC Offset knob on |
|
2107
|
Fri Oct 16 18:46:36 2009 |
rana | Configuration | ASC | loop opened on PZT2 YAW at 3:40 pm |
|
|
2109
|
Sun Oct 18 16:09:34 2009 |
rana | Configuration | ASC | loop opened on PZT2 YAW at 3:40 pm |
I wanted to see how long our IP POS
beam has been badly clipped - turns out its |
|
2205
|
Sun Nov 8 22:50:29 2009 |
Alberto | Update | ASC | IFO Alignment | Tonight I aligned the IFO by running the
scripts one by one.
SRC was far off and I had to align |
|
3191
|
Mon Jul 12 02:21:01 2010 |
Koji | Configuration | ASC | Resurrection of MC WFS | I have resurrected the MC WFS on Friday
night.
I have uncommented the WFS part of |
|
4087
|
Wed Dec 22 15:30:47 2010 |
Osamu | Update | ASC | ETMY oplev fixed | According to c1scy.mdl, OL signals should
be connected to adc_0_24 to adc_0_27 but
they were connected to adc_0_16 to adc_0_19 |
|
4280
|
Sun Feb 13 16:50:17 2011 |
kiwamu | Update | ASC | IP_ANG was at wrong ADC | I found that |
|
4287
|
Mon Feb 14 12:37:23 2011 |
kiwamu | Update | ASC | no signal from IP_ANG_Seg1 | It turns out there are no reasonable
signal from the segment 1 on the IP_ANG QPD.
|
|
4294
|
Tue Feb 15 02:13:16 2011 |
kiwamu | Summary | ASC | a daytime task : small signals on ETMX OL | Rana
and I found that the QPD for the optical
lever at X end are showing small signals. |
|
4295
|
Tue Feb 15 03:10:37 2011 |
kiwamu | Update | ASC | IR beam alignment for Xarm : TRX reduction | I tried aligning the IR beam axis for
the X arm to have good beam centering on
ITMX and ETMX. |
|
4296
|
Tue Feb 15 06:15:07 2011 |
Suresh | Update | ASC | no signal from IP_ANG_Seg1 | [Valery, kiwamu, Jenne, Suresh]
I first interchanged
the two QPD's on the Y end table to see if |
|
4306
|
Wed Feb 16 02:04:11 2011 |
kiwamu | Update | ASC | IR beam alignment | [Jenne and Kiwamu]
This time we aligned the vertical |
|
4355
|
Fri Feb 25 01:48:54 2011 |
valera | Update | ASC | mc auto alignment status | I made several scripts to handle
the mcass configuration and sensing measurements:
- The scripts and data are in the |
  |
4673
|
Tue May 10 00:31:28 2011 |
kiwamu | Update | ASC | IFO alignment plan | The alignment of the interferometer
goes basically step by step.
Tuesday will be an alignment day. |
|
4684
|
Wed May 11 00:23:21 2011 |
kiwamu | Update | ASC | Y arm and beam pointing alignment | [Jamie / Valera / Kiwamu]
The incident |
|
4769
|
Mon May 30 23:14:27 2011 |
valera | Update | ASC | Y arm initial alignment | I closed all 8 dither loops for the Y arm
initial alignment: 2x2 centering servo (this
worked before) and 2x2 input beam servo for |
|
4883
|
Sat Jun 25 04:40:43 2011 |
Suresh | Update | ASC | WFS1 Transimpedance measurement | WFS1 Transimpedance
The
attached plots show the location of the ~29.5
MHz pole and the 59 MHz notch for each quadrant |
  |
5062
|
Fri Jul 29 16:25:06 2011 |
kiwamu | Update | ASC | beam axis and Y arm aligned | Last night
I aligned the incident beam axis and the |
|
5067
|
Sat Jul 30 06:24:06 2011 |
kiwamu | Update | ASC | Y arm ASS fixed | The servos
of C1ASS for the Y arm and the beam axis |
|
5068
|
Sat Jul 30 07:07:28 2011 |
kiwamu | Update | ASC | MCASS status | Since
we will measure (and hopefully adjust) the
spot positions on the MC suspensions prior |
|
5073
|
Sat Jul 30 21:04:23 2011 |
kiwamu | Update | ASC | Y arm ASS fixed | The
X arm ASS was also fixed. So both X and Y
arm ASS are now back to normal. |
|
5083
|
Mon Aug 1 17:47:37 2011 |
steve | Update | ASC | what is not working | SUS-ETMY_QPD is not responding. It is reading
zero in dataviewer and 4,400 counts on QPD
MEDM screen.......must be wrong cable connected |
|
5374
|
Sat Sep 10 01:36:15 2011 |
kiwamu | Update | ASC | interferometer coarsely aligned | The
interferometer was coarsely aligned.
Now |
|
5518
|
Thu Sep 22 13:56:56 2011 |
kiwamu | Update | ASC | C1ASS : status update | The output
matrix in the C1ASS servo were coarsely readjusted |
|