| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
12428
|
Mon Aug 22 13:06:11 2016 |
gautam | Update | SUS | ETMY suspended | Today morning, I suspended ETMY and made
the same checks dscribed below. The clamping
went smoothly, 5 in. lb. of torque seems |
|
|
14615
|
Thu May 16 23:31:55 2019 |
gautam | Update | SUS | ETMY suspension characterization | Here is my analysis. I think there are
still some problems with this suspension.
|
6x |
|
14620
|
Fri May 17 17:01:08 2019 |
gautam | Update | SUS | ETMY suspension characterization | To investigate my mapping of the eigenfrequencies
to eigenmodes, I checked the Oplev spectra
for the last few hours, when the Oplev spot |
|
|
2280
|
Tue Nov 17 11:09:43 2009 |
Koji | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | I have connected ETMY sus electronics to
megatron ADC/DAC.
We continue this state until 15:00 |
|
|
2281
|
Tue Nov 17 13:39:37 2009 |
Koji | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | 0) Now the connection for the ETMY suspension
was restored in a usual state. It damps
well. |
|
|
2282
|
Tue Nov 17 15:23:06 2009 |
Koji | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | OK.
Now, Timing/ADC/DAC are working. It's almost
there.
1) As a temporaly |
|
|
2285
|
Tue Nov 17 21:10:30 2009 |
Koji | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | Koji, Rana
The megatron DAC was temporaly connected
to the suspension electronics for the DAC |
|
|
2290
|
Wed Nov 18 11:27:33 2009 |
Koji, josephb | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC |
|
|
|
2291
|
Wed Nov 18 12:33:30 2009 |
Koji, josephb | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | Hurraaaah!
We've got the damping of the suspension.
The Oplev loops has also worked!
The |
|
|
2293
|
Wed Nov 18 16:24:25 2009 |
pete | Configuration | SUS | ETMY suspension conencted to megatron ADC/DAC | /cvs/cds/caltech/target/fb/daqd -c daqdrc
This starts the FB.
Now the dataviewer and DTT work! |
|
|
15661
|
Fri Nov 6 11:36:37 2020 |
gautam | Update | General | ETMY suspension eigenmodes | Attachment
#1 shows the main |
|
|
15671
|
Tue Nov 10 15:13:41 2020 |
rana | Update | General | ETMY suspension eigenmodes | For the input matrix diagonalization, it
seemed to me that when we had a significant
seismic event or a re-alignment of the optic |
|
|
15673
|
Thu Nov 12 14:26:35 2020 |
gautam | Update | General | ETMY suspension eigenmodes | The results from the ringdown are attached
- in summary:
The peak positions have |
|
|
14433
|
Mon Feb 4 20:13:39 2019 |
gautam | Update | SUS | ETMY suspension oddness | I looked at the free-swinging sensor data
from two nights ago, and am struggling with
the interpretation. |
|
|
14441
|
Thu Feb 7 19:34:18 2019 |
gautam | Update | SUS | ETMY suspension oddness | I did some tests of the electronics chain
today.
Drove a sine-wave using |
|
|
7429
|
Sat Sep 22 01:03:30 2012 |
Den | Update | PEM | ETMY table | I've installed Guralp readout box back
and it turned out that it does not work with
voltage provided from the rack (+13.76 0 |
|
|
7539
|
Fri Oct 12 22:44:49 2012 |
Den | Update | PEM | ETMY table |
|
6x |
|
7540
|
Sun Oct 14 11:41:42 2012 |
Den | Update | PEM | ETMY table |
|
|
|
8330
|
Thu Mar 21 17:06:34 2013 |
Steve | Update | 40m Upgrading | ETMY table is out |
|
|
|
8340
|
Mon Mar 25 18:07:31 2013 |
Steve | Update | 40m Upgrading | ETMY table is out |
|
|
|
8355
|
Tue Mar 26 16:10:31 2013 |
Jamie | Update | 40m Upgrading | ETMY table leveling | Steve's suggestion for how to level the
end table using "swivel leveling mounts":
|
|
|
8320
|
Thu Mar 21 08:11:53 2013 |
Steve | Update | 40m Upgrading | ETMY table swap |
|
|
|
8321
|
Thu Mar 21 08:46:46 2013 |
Manasa | Update | 40m Upgrading | ETMY table swap | Yes! We are swapping.
I'll be there very soon! |
|
|
4695
|
Wed May 11 22:54:53 2011 |
Jenne | Update | Treasure | ETMY trans QPD installed | I put the ETMY trans QPD in.
The ETMY trans beam was already going
toward the TRY DC PD, and a CCD camera. |
|
|
213
|
Wed Dec 26 15:00:06 2007 |
rana | Update | SUS | ETMY tripping | Steve mentioned to me that ETMY is still tripping
more than ETMX. The attached DV plot
shows the trend of the watchdog sensors; |
|
|
214
|
Wed Dec 26 15:12:48 2007 |
rana | Update | SUS | ETMY tripping | It turned out that the ETMY POS damping gain
was set to 1.0 while the ETMX had 3.8.
|
|
|
216
|
Thu Dec 27 13:08:04 2007 |
rana | Update | SUS | ETMY tripping | Here's a trend from the last 2 days of ETMX
and ETMY. You can see that the damping gain
increase
|
|
|
629
|
Thu Jul 3 12:36:05 2008 |
Jonh | Summary | SUS | ETMY watchdog | ETMY watchdog was tripped. I turned it off
and re-enabled the outputs. |
|
|
2433
|
Sun Dec 20 14:34:24 2009 |
Koji | Update | SUS | ETMY watchdog tripped Sunday 5:00AM local | It seemed that the ETMY watchdog tripped
early Sunday morning.
The reason is not known. I just looked |
|
|
4802
|
Thu Jun 9 20:10:38 2011 |
kiwamu | Update | SUS | ETMY whitening filter : all off | I checked
the state of the whitening filters for the |
|
|
4065
|
Thu Dec 16 15:10:18 2010 |
josephb, kiwamu | Update | CDS | ETMY working at the expense of ETMX | I acquired
a second full pair of Host interface board
cards (one for the computer and one for the |
|
|
15607
|
Fri Oct 2 10:29:49 2020 |
gautam | Update | Optical Levers | ETMY, BS and ITMX HeNes degrading | Attachment
#1 shows that the |
|
|
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. |
|
|
8145
|
Sat Feb 23 14:52:03 2013 |
Jenne | Update | LSC | ETMYT camera back to normal |
|
|
|
12424
|
Fri Aug 19 22:51:12 2016 |
gautam | Update | SUS | ETMs first-contacted | I've applied first contact to both
the ETMs. They're now ready to be suspended.
I've also cut up some lengths of the |
|
|
1608
|
Tue May 19 16:08:03 2009 |
rana | Summary | SEI | EUCLID | From Stuart Aston, I've attached a picture
of the EUCLID position sensor: |
|
|
1810
|
Wed Jul 29 19:41:58 2009 |
Chris | Configuration | General | EUCLID-setup configuration change | David and I were thinking about changing
the non-polarizing beam splitter in the EUCLID
setup from 50/50 to 33/66 (ref picture). |
|
|
13998
|
Thu Jun 21 15:32:05 2018 |
gautam | Update | Electronics | EX AA filter range change | [steve, gautam]
I took this opportunity of EX downtime
to change the supply voltage for the AA unit |
|
|
14128
|
Fri Aug 3 14:35:56 2018 |
gautam | Summary | Electronics | EX AUX electronics power restored | Steve and I restored the power to the EX
AUX electronics rack. The power strip on
the lowest shelf of the AUX rack now |
|
|
14523
|
Mon Apr 8 18:28:25 2019 |
gautam | Update | ALS | EX Green PDH checkout | I worked on characterizing the green PDH
setup at EX, as part of the ALS noise budgeting
process. Summary of my findings: |
|
|
14527
|
Tue Apr 9 18:44:00 2019 |
gautam | Update | ALS | EX Green PDH discriminant measurement | I decided to use the more direct method,
of disconnecting feedback to the EX laser
PZT, and then looking at the cavity flashes. |
|
|
14524
|
Mon Apr 8 23:52:09 2019 |
gautam | Update | ALS | EX Green PDH error monitor calibrated | Some time ago, I had done an actuator
calibration of ITMX. This suspension
hasn't been victim to the recent spate |
|
|
14525
|
Tue Apr 9 00:16:22 2019 |
rana | Update | ALS | EX Green PDH error monitor calibrated | G=10 or
G=100? |
|
|
14526
|
Tue Apr 9 00:18:19 2019 |
gautam | Update | ALS | EX Green PDH error monitor calibrated | wrong assumption - i checked the gain just
now, it is G=10, and is running in the "low-noise"
mode, so can only drive 4V. fixed elog, filter. |
|
|
13751
|
Fri Apr 13 11:02:41 2018 |
gautam | Update | ALS | EX fiber polarization drift | Attachment #1 |
|
|
14740
|
Tue Jul 9 18:42:15 2019 |
gautam | Update | ALS | EX green doubling oven temperature controller power was disconnected | There was no green light even though the
EX NPRO was on. I checked the doubling oven
temperature controller and found that its |
|
|
13635
|
Fri Feb 16 01:09:55 2018 |
gautam | Update | ALS | EX green locking duty cycle | I have been puzzled as to why the duty
cycle of the EX
green locks are much |
|
|
13752
|
Fri Apr 13 16:59:12 2018 |
gautam | Update | ALS | EX green mode-matching | THIS CALCULATION |
|
|
12532
|
Wed Oct 5 16:28:10 2016 |
gautam | Update | endtable upgrade | EX laser power monitor PD installed | I installed a 10% BS to pick off some of
the light going to the IR fiber, and have
added a Thorlabs PDA55 PD to the EX table |
|
|
14984
|
Tue Oct 22 15:32:15 2019 |
gautam | Update | ALS | EX uPDH electronics checkout | Summary:
The EX PDH setup had what I thought
was insufficient phase and gain margins. |
|