| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16241
|
Thu Jul 8 11:20:38 2021 |
Anchal, Paco, Gautam | Summary | LSC | PRFPMI locking attempts | Last night Gautam walked us through the
algorithm used to lock PRFPMI. We tried it
several times with the PSL HEPA filter off |
|
|
16247
|
Wed Jul 14 20:42:04 2021 |
gautam | Update | LSC | Locking | [paco, gautam]
we decided to give the PRFPMI lock
a go early-ish. Summary of findings today |
|
|
16248
|
Thu Jul 15 14:25:48 2021 |
Paco | Update | LSC | CM board | [gautam, paco]
We tested the CM board by implementing
the high bandwidth IR lock (single arm). |
|
|
16251
|
Mon Jul 19 22:16:08 2021 |
paco | Update | LSC | PRFPMI locking | [gautam, paco]
Gautam managed to lock PRFPMI a
little before ~ 22:00 local time. The ALS |
|
|
16261
|
Tue Jul 27 23:04:37 2021 |
Anchal | Update | LSC | 40 meter party | [ian, anchal, paco]
After our second attempt of locking
PRFPMI tonight, we tried to resotre XARM |
|
|
16264
|
Wed Jul 28 17:10:24 2021 |
Anchal | Update | LSC | Schnupp asymmetry | [Anchal, Paco]
I redid the measurement of Schnupp
asymmetry today and found it to be 3.8 cm |
|
|
16275
|
Wed Aug 11 11:35:36 2021 |
Paco | Update | LSC | PRMI MICH orthogonality plan | [yehonathan, paco]
Yesterday we discussed a bit about
working on the PRMI sensing matrix. |
|
|
16303
|
Mon Aug 30 17:49:43 2021 |
Paco | Summary | LSC | XARM POX OLTF | Used diaggui to get OLTF in preparation
for optimal system identification / calibration.
The excitation was injected at the control |
|
|
16304
|
Tue Aug 31 14:55:24 2021 |
rana | Summary | LSC | XARM POX OLTF | this model doesn't seem to include
the analog AA, analog AI, digital AA, digital
AI, or data transfer delays in the system. |
|
|
16320
|
Mon Sep 13 09:15:15 2021 |
Paco | Update | LSC | MC unlocked? | Came in at ~ 9 PT this morning to find
the IFO "down". The IMC had lost
its lock ~ 6 hours before, so at about 03:00 |
|
|
16322
|
Mon Sep 13 15:14:36 2021 |
Anchal | Update | LSC | Xend Green laser injection mirrors M1 and M2 not responsive | I was showing some green laser locking
to Tega, I noticed that changing the PZT
sliders of M1/M2 angular position on Xend |
|
|
16368
|
Thu Sep 30 14:13:18 2021 |
Anchal | Update | LSC | HV supply to Xend Green laser injection mirrors M1 and M2 PZT restored | Late elog, original date Sep 15th
We found that the power switch
of HV supply that powers the PZT drivers |
|
|
16888
|
Fri Jun 3 15:22:51 2022 |
yuta | Update | LSC | Both arms locked with POY/POX, IR beam centered on TMs with ASS | [JC, Paco, Yuta]
We locked both Y and X arms with POY11 |
|
|
16889
|
Fri Jun 3 17:42:50 2022 |
yuta | Update | LSC | MICH locks with AS55_Q | AS path at AP table as re-aligned and confirmed
that MICH can be locked with AS55 Q.
|
|
|
16890
|
Sun Jun 5 19:46:40 2022 |
Paco | Update | LSC | Fixed IMC Trans sum issue | [Paco]
Fixed the issue below:
|
|
|
16892
|
Mon Jun 6 13:35:11 2022 |
Paco | Update | LSC | First calibrated spectra of MICH at AS55 Q | [Paco, Yuta]
On the topic of high AS55_Q RFPD
offset, it seems it stems from a small residual |
|
|
16929
|
Fri Jun 17 16:22:21 2022 |
yuta | Update | LSC | Actuator calibration of BS. ITMX, ITMY, updated MICH displacement spectra from c1cal | Following what we have done in 2013 (40m/8242),
actuator calibration was done using MICH. |
6x |
|
16940
|
Wed Jun 22 18:55:31 2022 |
yuta | Update | LSC | Daily alignment work; POY trouble solved | [Koji, Yuta]
I found that Yarm cannot be locked |
|
|
16941
|
Wed Jun 22 19:41:13 2022 |
Koji | Update | LSC | Daily alignment work; POY trouble solved | Before the final measurement of the DC
values for the transmissions, I aligned the
PMC. This made the PMC trans increased from |
|
|
16952
|
Mon Jun 27 18:54:27 2022 |
yuta | Update | LSC | Modulation depths measurement using Yarm cavity scan | [Yehonathan, Yuta]
EDITED
by YM on 22:11 June 27, 2022 to correct for |
|
|
16968
|
Fri Jul 1 08:50:48 2022 |
yuta | Summary | LSC | FPMI with REFL/AS55 trial | [Anchal, Paco, Yuta]
We tried to lock FPMI with REFL55
and AS55 this week, but no success yet. |
|
|
16977
|
Thu Jul 7 18:18:19 2022 |
yuta | Update | LSC | Actuator calibration of ETMX and ETMX | (This is a
complete restore of elog 40m/16970
from July 5, 2022 at 14:34) |
|
|
16978
|
Thu Jul 7 18:22:12 2022 |
yuta | Update | LSC | Actuator calibration of MC2 using Yarm | (This is also
a restore of elog 40m/16971
from Jul 5, 2022 at 17:36) |
|
|
16981
|
Fri Jul 8 16:18:35 2022 |
rana | Update | LSC | Actuator calibration of MC2 using Yarm | although I know that Yuta knows this, I
will just put this here to be clear: the
NNN/f^2 calibration is only accurate abouve |
|
|
17002
|
Thu Jul 14 00:10:08 2022 |
yuta | Summary | LSC | FPMI with REFL/AS55 trial continued | [Paco, Koji, Yuta]
We managed to lock MICH using REFL55_Q
by setting the demodulation phases and offsets |
|
|
17007
|
Fri Jul 15 19:13:22 2022 |
Paco | Summary | LSC | FPMI with REFL/AS55 demod phase adjust | [Yuta, Paco]
We first zero the offsets
in ASDC, AS55, REFL55, POX11, and POY11 when |
|
|
17008
|
Fri Jul 15 22:36:04 2022 |
rana | Summary | LSC | FPMI with REFL/AS55 demod phase adjust | Very nice! |
|
|
17012
|
Mon Jul 18 16:39:07 2022 |
Paco | Summary | LSC | FPMI locking procedure using REFL55 and AS55 | [Yuta, Paco]
In summary, we locked FPMI using
REFL55_I, REFL55_Q, and AS55_Q. The key to |
|
|
17014
|
Mon Jul 18 17:07:12 2022 |
yuta | Update | LSC | x4.12 added to ETMX coil outputs to balance with ETMY | To balance the actuation on ETMX and ETMY,
x4.12
was aded to C1:SUS-ETMX_(UL|UR|LR|LL|SD)COIL |
|
|
17016
|
Mon Jul 18 21:41:42 2022 |
Anchal | Summary | LSC | FPMI locking procedure using REFL55 and AS55 | Now that you have found a working configuration,
I suggest we update CARM and DARM filter
banks so that they are used in locking those |
|
|
17069
|
Tue Aug 9 19:54:31 2022 |
yuta | Summary | LSC | FPMI locking tonight | [Tega, Anchal, Yuta]
We resored FPMI locking settings. |
|
|
17089
|
Thu Aug 18 14:49:35 2022 |
Yehonathan | Summary | LSC | FPMI Sensitivity | {Yuta, Yehonathan}
We wrote a notebook found on Git/40m/measurements/LSC/FPMI/NoiseBudget/FPMISensitivity.ipynb
for calculating the MICH, DARM (currently |
|
|
17091
|
Thu Aug 18 18:10:49 2022 |
Koji | Summary | LSC | FPMI Sensitivity | The overlapping plot of the calibrated
error and control signals gives you an approximately
good estimation of the freerun fluctuation, |
|
|
17122
|
Wed Aug 31 11:39:48 2022 |
Yehonathan | Update | LSC | Updated XARM noise budget | {Radhika, Paco, Yehonathan}
For educational purposes we update
the XARM noise budget and add the POX11 calibrated |
|
|
17137
|
Thu Sep 8 16:03:25 2022 |
Yehonathan | Update | LSC | Realignment, arm locking, gains adjustments | {Anchal, Yehonathan}
We came this morning and the IMC
was misaligned. The IMC was realigned and |
|
|
17141
|
Thu Sep 15 16:19:33 2022 |
Yehonathan | Update | LSC | POX-POY noise budget | Doing POX-POY noise measurement as a poor
man's FPMI for diagnostic purposes. (Notebook
in /opt/rtcds/caltech/c1/Git/40m/measurements/LSC/POX-POY/Noise_Budget.ipynb) |
|
|
17277
|
Thu Nov 17 11:24:39 2022 |
JC | HowTo | LSC | Locking MICH | [Yuta, JC]
Here is the Yuta's Alignment
Scheme from elog |
|
|
17321
|
Tue Nov 29 11:38:37 2022 |
JC | HowTo | LSC | Lock Single Arm After MICH lock | I tried locking single arm this morning,
but I was unable to because the triggers
were set to lock strictly to MICH. Anchal |
|
|
17359
|
Wed Dec 14 17:01:39 2022 |
Paco | Summary | LSC | FPMI in the post-cds upgrade era | [Paco, Anchal, Koji]
A possible long-hidden
bug of MC2 dewhitening switching was found |
|
|
17366
|
Tue Dec 20 09:20:18 2022 |
Paco | Summary | LSC | FPMI locked and cal | [Anchal, Yuta, Paco]
Late elog (from yesterday) -- We
locked FPMI, YAUX, and turned on calibration |
|
|
17367
|
Tue Dec 20 18:27:14 2022 |
Anchal | Summary | LSC | FPMI locked, DARM calibration data taken, FPMI BHD locked! | [Anchal, Paco, Yuta]
FPMI |
|
|
17369
|
Wed Dec 21 12:18:44 2022 |
Paco | Summary | LSC | FPMI locked, but FPMI BHD not locked | [Yuta, Paco]
We tried restoring the FPMI BHD
readout from yesterday but |
|
|
17392
|
Wed Jan 11 16:56:57 2023 |
yuta | Summary | LSC | FPMI BHD recovered, LO phase noise not limiting the sensitivity | [Paco, Yuta]
We recovered FPMI BHD, and sensitivity |
6x |
|
17395
|
Thu Jan 12 12:00:09 2023 |
Paco | Summary | LSC | FPMI BHD sensitivity curve with higher resolution upto 6.9 kHz | Here's the same sensitivity plot from
yesterday (40m/17392),
but with higher frequency resolution, upto |
|
|
17399
|
Fri Jan 13 14:20:34 2023 |
yuta | Summary | LSC | Calibration friendly FPMI BHD | [Paco, Yuta]
Gains in DARM are corrected to make |
|
|
17400
|
Fri Jan 13 18:54:59 2023 |
yuta | Summary | LSC | Investigations of LO phase locking in FPMI BHD | [Paco, Yuta]
After several hours of unattended |
|
|
17428
|
Thu Jan 26 23:33:19 2023 |
Koji | Update | LSC | EP30-2 Epoxy bonding for Yuta | @OMC Lab
EP30-2 Epoxy bonding of V beam dumps
for LSC PDs. |
|
|
17135
|
Thu Sep 8 11:54:37 2022 |
JC | Configuration | Lab Organization | Lab Organization | The arms in the 40m laboratory have now
been sectioned off. Each arm has been divided
up into 15 sections. Along the Y arm, the |
|
|
17136
|
Thu Sep 8 12:01:02 2022 |
JC | Configuration | Lab Organization | Lab Organization | The floor cable cover has been changed
out for a new one. This is in Section X11. |
|
|
17187
|
Thu Oct 13 14:46:34 2022 |
JC | Update | Lab Organization | Lab Cleanup 10/12/2022 | During Wednesday’s lab clean up,
we made a ton of progress in organization.
Our main focus was to tackle CDS debris from |
|