| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
15095
|
Wed Dec 11 22:01:24 2019 |
rana | Configuration | Computers | Megatron: starts up grade | Megatron is now running Ubuntu 18.04
LTS.
We should probably be able to load |
|
|
15094
|
Wed Dec 11 15:29:17 2019 |
Yehonathan | Update | PSL | PMC is locked | Make sure
to measure the power drop of the beam downstream |
|
|
15093
|
Wed Dec 11 15:01:57 2019 |
Jon | Summary | PSL | PMC cavity ringdown measurement | [Jon, Yehonathan]
We carried out a set of cavity
ringdown measurements of the PMC. The 1/e |
|
|
15092
|
Tue Dec 10 18:27:22 2019 |
Yehonathan | Update | PSL | PMC is locked | {Yehonathan, Jon}
We are able to lock the PMC on
the TEM00 mode of the deflected beam. |
|
|
15091
|
Tue Dec 10 15:17:17 2019 |
Yehonathan | Update | PSL | PMC is locked | {Jon, Yehonathan}
We burt-restored the PSL and the
PMC locked immediately. |
|
|
15090
|
Tue Dec 10 13:26:46 2019 |
Yehonathan | Update | PSL | AOM first order beam alignment | nvm the PZT can scan over many GHz.
|
|
|
15089
|
Tue Dec 10 01:24:17 2019 |
Yehonathan | Update | PSL | AOM first order beam alignment |
|
|
|
15088
|
Mon Dec 9 21:22:46 2019 |
shruti | Update | General | PLL / PM measurement of Xend NPRO PZT | In short:
Using the
same setup as before with a LPF changed to
have a cutoff of 5 MHz, the PLL was implemented |
|
|
15087
|
Mon Dec 9 19:19:04 2019 |
Yehonathan | Update | PSL | AOM first order beam alignment | {Yehonathan, Rana}
In order to setup a ringdown measurement
with perfect extinction we need to align |
|
|
15086
|
Mon Dec 9 13:08:24 2019 |
Yehonathan | Summary | PEM | Jump test of seismometers: EX needs recentering | I check the seismometers in the last 14
hours (Attached). Seems like the coherenece
is restored in the x direction. |
|
|
15085
|
Sun Dec 8 20:48:29 2019 |
rana | Configuration | Computers | Megatron: starts up grade | I noticed recently that Megatron was running
Ubuntu 12, so I've started
its OS upgrade. |
|
|
15084
|
Sun Dec 8 20:27:11 2019 |
rana | Update | Computers | Viviana upgrade to Ubuntu 16 | The IBM laptop at EX was running Ubuntu
14, so I allowed it to start upgrading itself
to Ubuntu16 as it desired. After it is done, |
|
|
15083
|
Sun Dec 8 20:15:41 2019 |
rana | Summary | PEM | Jump test of seismometers: EX needs recentering | I have re-centered the EX (and EY) seismometers.
They are Guralp CMG40-T, and have no special
centering procedure except cycling the power |
|
|
15082
|
Fri Dec 6 17:49:46 2019 |
rana | Summary | PEM | Jump test of seismometers: EX needs recentering | Yehonathan, |
|
|
15081
|
Fri Dec 6 15:22:01 2019 |
gautam | Frogs | LSC | DAFI system revived | [Jordan, gautam]
We did the following: |
|
|
15080
|
Fri Dec 6 00:02:48 2019 |
gautam | Update | LSC | What is the correct way to set the 3f offsets? | Summary:
I made it to 0 CARM offset, PRMI
locked a bunch of times today. However, I |
|
|
15079
|
Thu Dec 5 18:15:01 2019 |
gautam | Update | Optical Levers | ITM, PRM and BS Oplevs re-centered | In preparation for locking tonight, I re-centered
the spots on the Oplev QPDs for the ITMs,
BS and PRM after locking and running the |
|
|
15078
|
Thu Dec 5 15:09:50 2019 |
gautam | Update | CDS | c1oaf crashed c1lsc | I tried starting the c1oaf model, but got
a DQ error (I want the option of running
feedforward during locking even if the filters |
|
|
15077
|
Thu Dec 5 14:54:15 2019 |
gautam | Update | General | Symlink to SRmeasure and AGmeasure | I symlinked the SRmeasure and AGmeasure
commands to /usr/bin/ on donatella (as it
is done on pianosa) so that these scripts |
|
|
15076
|
Thu Dec 5 08:44:44 2019 |
Gavin | Update | Loss Measurement | Q Measurements of Test Masses | [Yehonathan, Gavin]
Measuring POX11_Q_MON and injecting
a signal into the ITMX_UL_IN port a signal |
|
|
15075
|
Thu Dec 5 01:54:39 2019 |
gautam | Update | LSC | Partial CM board path engaged |
The arm powers could be stabilized
somewhat once the CM_SLOW path to MC2 was
engaged.
However, I was never |
|
|
15074
|
Wed Dec 4 20:32:43 2019 |
gautam | Update | General | PLL for PM measurement | Were
some cables from the ALS beat setup modified?
I can't see the beat on the scope, and |
|
|
15073
|
Wed Dec 4 19:54:27 2019 |
gautam | Update | LSC | A look to the past | Trawling
through some past elogs, I saw that the ALS
noise increase as a function of CARM offset |
|
|
15072
|
Wed Dec 4 12:13:10 2019 |
gautam | Update | CDS | Reboot script | It was way more annoying without a script
and took longer than the 4 minutes it does
now. |
|
|
15071
|
Wed Dec 4 09:11:42 2019 |
Yehonathan | Update | CDS | Reboot script | After the CDSs crashed we run the rebootC1LSC.sh script.
The script is a bit annoying in
that it requires entering the CDSs' passwords |
|
|
15070
|
Wed Dec 4 08:54:07 2019 |
Yehonathan | Update | IMC | Mirror analog shaking | {Yehonathan, Gavin}
Yesterday we tried to shake ITMX
with a function generator in order to observe |
|
|
15069
|
Tue Dec 3 22:41:17 2019 |
shruti | Update | General | PLL for PM measurement | I worked on the setup up for the phase
modulation measurement of the X end NPRO
PZT. A previous similar measurement can be |
|
|
15068
|
Tue Dec 3 21:28:24 2019 |
gautam | Update | ALS | EY uPDH post mixer LPF | Here are some loop transfer functions.
I basically followed the decomposition of
the end PDH loop as was done in the multi-color |
|
|
15067
|
Tue Dec 3 20:32:37 2019 |
rana | Omnistructure | DAQ | NDS2 situation | Recently,
accordian to Gautam, the NDS2 server has |
|
|
15066
|
Tue Dec 3 18:15:42 2019 |
gautam | Update | ALS | EY uPDH post mixer LPF | Rana and I discussed this alogrythym a
bit today - here are some bullet points,
I'll work on preparing a notebook. We |
|
|
15065
|
Tue Dec 3 14:52:13 2019 |
rana | Update | IMC | Q Measurement of Test Masses |
|
|
|
15064
|
Tue Dec 3 00:51:25 2019 |
gautam | Update | ALS | EY uPDH post mixer LPF | I'm not sure - maybe it was measurement
error on my part, I will double check. Moreover,
the EX |
|
|
15063
|
Tue Dec 3 00:10:15 2019 |
Koji | Update | ALS | EY uPDH post mixer LPF | I got confused. Why don't we see that
too-high-Q pole in the OLTF? |
|
|
15062
|
Tue Dec 3 00:03:57 2019 |
gautam | Update | LSC | Green ALS also shows elevated noise with high arm buildup | Summary: |
|
|
15061
|
Mon Dec 2 23:01:47 2019 |
gautam | Update | CDS | Frequent DTT crashes on pianosa | I have been experiencing frequent crashes of |
|
|
15060
|
Mon Dec 2 20:18:18 2019 |
rana | Update | ALS | EY uPDH post mixer LPF |
filter
Q seems too high, |
|
|
15059
|
Mon Dec 2 18:20:29 2019 |
gautam | Update | ALS | EY uPDH post mixer LPF | As part of characterization, I wanted to
calibrate the EY uPDH error point monitor
into units of Hz. So I thought I'd measure |
|
|
15058
|
Mon Dec 2 00:27:20 2019 |
gautam | Update | ALS | Green ALS resurrection | Attachment
#1 - |
|
|
15057
|
Sun Dec 1 13:38:48 2019 |
rana | Update | LSC | No shaking but no inspiration either | yes, reasonable |
|
|
15056
|
Wed Nov 27 23:24:01 2019 |
gautam | Update | LSC | No shaking but no inspiration either | Summary:
I tried the following minor changes
to the locking procedure to see if there |
|
|
15055
|
Wed Nov 27 18:51:22 2019 |
Gavin Wallace | Update | IMC | Q Measurement of Test Masses | [Yehonathan, Gavin]
As the resonant modes of the 40m
TMs are at high frequencies (starting at |
|
|
15054
|
Wed Nov 27 17:51:52 2019 |
gautam | Update | Wiener | MCL FF status | The old MCL filters are not completely
useless - I find a factor of ~2 reduction
in the MCL RMS when I turn the FF on. It'd |
|
|
15053
|
Wed Nov 27 16:10:29 2019 |
gautam | Update | LSC | AOM reconnected | i reconnected the AOM driver to the AOM
in the main beam path (it was hijacked for
the AOM in the AUX laser path for Anjali's |
|
|
15052
|
Wed Nov 27 13:14:02 2019 |
rana | Update | LSC | ITMX and ITMY OSEMs with low and high circulating power | if the RP don't fit
u must acquit
sweep the laser amplitude |
|
|
15051
|
Wed Nov 27 12:16:52 2019 |
gautam | Update | LSC | ITMX and ITMY OSEMs with low and high circulating power | Summary:
The ITMX OSEMs report elevated
noise in the 10-100 Hz band when we have |
|
|
15050
|
Tue Nov 26 18:16:08 2019 |
rana | Update | LSC | POX / POY calibration | ...maybe the opto-mechanical
CARM plant |
|
|
15049
|
Tue Nov 26 17:07:41 2019 |
gautam | Update | LSC | POX / POY calibration | Summary:
Since we are using the POX and
POY photodiodes as out-of-loop sensors for |
|
|
15048
|
Tue Nov 26 13:33:33 2019 |
Yehonathan | Update | Cameras | MC2 Camera rotated by 90 degrees | MC2 analog camera was rotated by 90 degrees.
Orientation correctness was verified by exciting
the MC2 Yaw degree of freedom. |
|
|
15047
|
Mon Nov 25 22:10:26 2019 |
shruti | Update | NoiseBudget | Diagnostics | This is to help troubleshoot the excess
noise measured earlier.
The following channels were measured |
|
|
15046
|
Mon Nov 25 19:11:22 2019 |
gautam | Update | LSC | ALS noise re-look | I re-checked the ALS noise in the following
configurations:
PRM is misaligned.
Michelson |
|