| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16266
|
Thu Jul 29 14:51:39 2021 |
Paco | Update | Optical Levers | Recenter OpLevs | [yehonathan, anchal, paco]
Yesterday around 9:30 pm, we centered
the BS, ITMY, ETMY, ITMX and ETMX oplevs |
|
|
16268
|
Tue Aug 3 20:20:08 2021 |
Anchal | Update | Optical Levers | Recentered ETMX, ITMX and ETMY oplevs at good state | Late elog. Original time 08/02/2021 21:00.
I locked both arms and ran ASS
to reach to optimum alignment. ETMY PIT > |
|
|
1150
|
Fri Nov 21 16:03:50 2008 |
rana | HowTo | General | Recharging Batteries | I found some black & red "Ninja" alkaline
AA batteries in the battery charger. [COLOR=red]This
is dangerous.[/COLOR] Please
|
|
|
14091
|
Fri Jul 20 18:30:47 2018 |
Jon | Configuration | AUX | Recommend to install AUX PZT driver | I recently realized that the PLL is only
using about 20% of the available actuation
range of the AUX PZT. The +/-10 V control |
|
|
16674
|
Wed Feb 16 15:19:41 2022 |
Anchal | Update | General | Reconfigured MC reflection path for low power | I reconfigured the MC reflection path for
low power. This meant the following changes:
Replaced the 10% reflection |
|
|
7690
|
Thu Nov 8 20:54:08 2012 |
Manasa, Ayaka | Update | Alignment | Reconfirming on IPPOS, IPANG and oplevs centering |
|
|
|
1907
|
Fri Aug 14 18:33:02 2009 |
Clara | Update | | Record of Accelerometer and Seismometer Movements | Rather than make a new elog post every
time I move something, I'm going to just
keep updating this Google spreadsheet, which |
|
|
4123
|
Fri Jan 7 00:49:16 2011 |
Jenne | Update | Green Locking | Recovered Xarm Green Lock, Preparation for Beat Note Measurement | [Kiwamu, Jenne]
We went this evening in search of
a beat note signal between the Xarm transmitted |
|
|
12611
|
Sat Nov 12 01:09:56 2016 |
gautam | Update | LSC | Recovering DRMI locking | Now that we have all Satellite boxes working
again, I've been working on trying to
recover the DRMI 1f locking over the last |
|
|
16924
|
Thu Jun 16 18:23:15 2022 |
Paco | Configuration | BHD | Recovering LO beam in BHD DCPDs | [Paco, Yuta]
We recovered the LO beam on the
BHD port. To do this, we first tried reverting |
|
|
9755
|
Wed Mar 26 22:22:43 2014 |
Manasa | Update | General | Recovery | The following
that went unnoticed from yesterday were recovered
today: |
|
|
9756
|
Thu Mar 27 10:34:39 2014 |
ericq | Update | General | Recovery |
|
|
|
10326
|
Sun Aug 3 17:19:32 2014 |
ericq | Update | General | Recovery efforts | [ericq, Jenne]
We both happened to come by today
to fix things up. |
|
|
10327
|
Sun Aug 3 23:47:56 2014 |
Koji | Update | General | Recovery efforts | It's great that you guys found the beam.
Yes, ITMX kick and lost communication |
|
|
5592
|
Sat Oct 1 17:47:21 2011 |
Koji | Summary | General | Recovery from the power shutdown | [Steve Koji Kiwamu]
- The storage on linux1 and linux1
itself (with this order) were turned on at |
|
|
5593
|
Sat Oct 1 22:53:49 2011 |
kiwamu | Summary | General | Recovery from the power shutdown : lockable | Found the Marconi for the 11 MHz source
had been reset to its default.
=> reset the parameters. |
|
|
5599
|
Mon Oct 3 08:38:21 2011 |
steve | Summary | VAC | Recovery from the power shutdown is completed |
I failed to start Rana's favorit
anciant desktop computer at the vac rack. |
|
|
5662
|
Thu Oct 13 21:40:59 2011 |
rana | Summary | VAC | Recovery from the power shutdown is completed | As it turns out Steve is not crazy
in this particular instance: the vacuum computer,
linux3 , has some issues. I can login just |
|
|
5596
|
Sun Oct 2 13:45:13 2011 |
rana | Summary | General | Recovery from the power shutdown: apache / svn | Restarted Apache on nodus using Yoichi's
wiki instructions. SVN is back up. |
|
|
4432
|
Wed Mar 23 12:40:22 2011 |
Chief Recycling Officer | HowTo | Environment | Recycle stuff! | The following is a message from the LIGO
40m Chief Recycling Officer:
|
|
|
10449
|
Thu Sep 4 01:28:32 2014 |
ericq | Update | LSC | Recycling cavity lengths | Going off some discussion we had
at lunch today, here is my current knowledge
of the state of cavity lengths. |
|
|
10451
|
Thu Sep 4 10:10:23 2014 |
Koji | Update | LSC | Recycling cavity lengths | Com'on. This is just a 60ppm change of
the mod frequency from the nominal. How can
it change the recycling cav length by more |
|
|
10453
|
Thu Sep 4 18:16:20 2014 |
ericq | Update | LSC | Recycling cavity lengths | Koji correctly points out that I naïvely
overlooked various factors. With a similar
analysis to the wiki page, I get: |
|
|
2071
|
Thu Oct 8 21:32:59 2009 |
Koji | Summary | General | Recycling cavity loss | I looked at the data of the day before
yesterday (Oct 06) to know how much is the
recycling gain. |
|
|
1900
|
Fri Aug 14 02:57:46 2009 |
Clara | Update | PEM | Redo of the Huddle Test | I put all three seismometers and all six
accelerometers together in the foam box with
peanuts. Three of the accelerometers are |
|
|
16623
|
Tue Jan 25 16:42:03 2022 |
Anchal | Summary | BHD | Reduced filter gains in all damped new SOS | I noticed that our current suspension damping
loops for the new SOS were railing the DAC
outputs. The reason being that cts2um module |
|
|
5096
|
Tue Aug 2 17:40:04 2011 |
Jenny | Update | PSL | Reducing beam intensity incident on photodiode | I am using a PDA255 photodiode to measure
the power outputted by the NPRO beam on the
PSL table. (I'm going to then use a network |
|
|
741
|
Fri Jul 25 19:57:18 2008 |
Jenne | Update | PSL | Ref Cav & PMC | "PMC is in, but is still being worked on.
Leave it alone." ---Rana
|
|
|
1847
|
Thu Aug 6 18:26:26 2009 |
Jenne | Update | PSL | Ref Cav and PMC aligned | [Alberto, Jenne]
We aligned both the reference cavity
and the PMC, each by looking at their Trans |
|
|
1850
|
Thu Aug 6 23:29:47 2009 |
Jenne | Update | PSL | Ref cav reflection PD is funky | After Alberto and I worked on aligning
the reference cavity, Rob asked the important
and useful question: what is the visibility |
|
|
1851
|
Fri Aug 7 00:10:14 2009 |
rana | Update | PSL | Ref cav reflection PD is funky | we have a tester cable, but you don't want
it. Instead the problem is probably at the
cross-connect. The D-cable goes to a cross-connect |
|
|
1860
|
Fri Aug 7 17:05:34 2009 |
Jenne | Update | PSL | Ref cav reflection PD is funky |
|
|
|
5072
|
Sat Jul 30 20:41:50 2011 |
rana | Update | PSL | RefCav Stabilization back on | |
|
|
12573
|
Wed Oct 19 18:32:25 2016 |
rana, yinzi | Update | PSL | RefCav thermal control: heater is dead | We wanted to re-activate the Heater for
the reference cavity today to use it as a
testbed for PID autotuning and the new heater |
|
|
1001
|
Fri Sep 26 19:08:43 2008 |
rana | Configuration | PSL | Refcav Trans: PD + Camera + Dumps | I went out to improve the Refcav trans path.
I removed all ND filters to get rid of the |
|
|
1923
|
Tue Aug 18 14:24:43 2009 |
Yoichi | Summary | PSL | Reference Cavity Inspection | Rana, Koji, Yoichi
To see why the reflected beam from the RC |
|
|
3240
|
Fri Jul 16 20:25:52 2010 |
Megan | Update | PSL | Reference Cavity Insulation | Rana and I
1) took the temperature sensors off
the reference cavity; |
|
|
3241
|
Fri Jul 16 23:53:27 2010 |
Rana | Update | PSL | Reference Cavity Insulation | From the trend, it seems that the Reference
Cavity's temperature servo is working fine
with the new copper foil. I was unable to |
|
|
3280
|
Fri Jul 23 16:02:16 2010 |
Rana | Update | PSL | Reference Cavity Insulation | This is the trend so far with the copper
foil wrapping. According to Megan's calculation,
we need ~1 mm of foil and the thickness of |
|
|
3282
|
Fri Jul 23 21:14:29 2010 |
Rana | Update | PSL | Reference Cavity Insulation | I wrapped another ~3 layers onto there.
It occurs to me now that we could just get
some 2mm thick copper plates made to fit |
|
|
2732
|
Mon Mar 29 21:43:27 2010 |
Alberto | Configuration | PSL | Reference Cavity PD Noise Spectrum | [Rana, Alberto]
This evening we measured the noise
spectrum of the reference cavity PD used |
|
|
2733
|
Tue Mar 30 06:37:32 2010 |
rana | Configuration | PSL | Reference Cavity PD Noise Spectrum | Some more words about the RFAM: I noticed
that there was an excess RFAM by unlocking
the RC and just looking at the RF out with |
|
|
2759
|
Sat Apr 3 11:35:47 2010 |
rana | Configuration | PSL | Reference Cavity PD Noise Spectrum | The units on this
plot are completely bogus - we know that
the thermal noise from the resonant part |
|
|
2760
|
Sat Apr 3 16:07:40 2010 |
Alberto | Configuration | PSL | Reference Cavity PD Noise Spectrum | I was aware of a problem on those
units since I acquired the data. Then it
wasn't totally clear to me which were the |
|
|
2742
|
Wed Mar 31 15:31:53 2010 |
steve | Update | PSL | Reference Cavity RF PD base upgraded |
|
|
|
1954
|
Wed Aug 26 19:58:14 2009 |
Rana, Alberto | Update | PSL | Reference Cavity Temperature Control: MINCO PID removed | Summary: This afternoon we managed
to get the temperature control of the reference
cavity working again. |
|
|
1956
|
Thu Aug 27 13:42:08 2009 |
rana | Summary | PSL | Reference Cavity Temperature Control: psl.db changes | I made the changes
to the psl.db to handle the new Temperature |
|
|
1018
|
Wed Oct 1 23:21:03 2008 |
Yoichi | Configuration | PSL | Reference cavity reflection camera | I re-centered the reference cavity reflection
camera, which has been mis-aligned for a
while.
|
|
|
1915
|
Mon Aug 17 02:05:49 2009 |
Yoichi,rana | Update | PSL | Reference cavity reflection looks bad | Rana, Yoichi
It has been a well known fact that the reference |
|
|
1917
|
Mon Aug 17 04:16:13 2009 |
Yoichi | Update | PSL | Reference cavity reflection looks bad | [quote]Rana, Yoichi
- We also moved the Refcav reflection camera
to look at the leakage through a reflection |
|