| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
7294
|
Tue Aug 28 11:28:31 2012 |
ericq | Update | PSL | PMC alignment going bad |
|
|
|
7295
|
Tue Aug 28 16:27:22 2012 |
ericq | Update | PSL | PBS and Half Wave plates introduced | [Jenne, Eric]
We installed a Half Wave Plate ->
Polarized Beam Splitter -> Half Wave Plate |
|
|
7297
|
Tue Aug 28 17:16:54 2012 |
ericq | Update | PSL | Power reduced! | We have now reduced the power being
input to the MC from 1.25W to 10mW, and changed
out the MC refl BS for a mirror. |
|
|
7306
|
Wed Aug 29 11:47:21 2012 |
ericq | Update | VAC | Venting | [Steve, Eric]
I've been helping Steve vent this
morning. The following things were done (from |
|
|
7308
|
Wed Aug 29 17:02:41 2012 |
ericq | Update | PSL | Power reduced! |
|
|
|
7337
|
Tue Sep 4 13:50:26 2012 |
ericq | Update | PSL | PMC Realigned, power adjusted | I adjusted the PMC alignment this
morning, brought the transmission up to 0.83V.
After the lunch meeting, we found |
|
|
7377
|
Wed Sep 12 20:08:51 2012 |
ericq | Update | Electronics | AS beam scan |
|
|
|
7958
|
Tue Jan 29 20:28:11 2013 |
ericq | Update | General | Early work on Mirror Mounts | [Q, Chloe]
Chloe has been to the lab twice to
start up her investigations in acoustic noise |
|
|
9442
|
Wed Dec 4 21:41:09 2013 |
ericq | Update | Green Locking | Green PDH Characterization | My job right now is to characterize
the green PDH loops on each arm. Today, Jenne
took me around and pointed at the optics |
|
|
9447
|
Fri Dec 6 12:45:51 2013 |
ericq | Update | Green Locking | Green PDH Characterization | Yesterday, made a slew of measurements
on the X-arm when locked on green. By tweaking
the temperature loop offset and the green |
|
|
9459
|
Thu Dec 12 21:23:15 2013 |
ericq | Update | Green Locking | Better Xarm OLTF | With the newly repaired PDH board, I spent
some time with the x arm green PDH loop.
I found it SO MUCH EASIER to measure the |
|
|
9496
|
Thu Dec 19 19:45:12 2013 |
ericq | Update | Green Locking | X-Arm Green PDH Loop Stuff | With the fixed servo box, I remeasured the
OLTF, the servo, and the low pass filter
between the mixer output and servo input. |
|
|
9539
|
Wed Jan 8 16:08:52 2014 |
ericq | Summary | LSC | Effect of PRC length mismatch on error signals | [ericq,Gabriele]
So, we want an relatively quick measurement
of the PRC length error (with sign!) at the |
|
|
9544
|
Thu Jan 9 17:58:31 2014 |
ericq | Summary | LSC | Effect of PRC length mismatch on error signals | [ericq, Gabriele, Manasa]
We wanted to perform the PRC
length measurement today with an AS11 signal, |
|
|
9560
|
Thu Jan 16 21:38:13 2014 |
ericq | Update | LSC | Repeat of PRC length measurement | [ericq,Jenne]
Since we don't have agreement between
the measurements we made the other day and |
|
|
9566
|
Wed Jan 22 16:36:45 2014 |
ericq | Update | Electronics | RF distribution box power button fail |
|
|
|
9608
|
Thu Feb 6 16:41:31 2014 |
ericq | Update | General | In-Vac Alignment | [Manasa, ericq]
Both arms |
|
|
9609
|
Fri Feb 7 12:43:12 2014 |
ericq | Update | General | In-Vac Alignment | [ericq]
|
|
|
9612
|
Fri Feb 7 13:30:25 2014 |
ericq | Update | General | In-Vac Alignment |
|
|
|
9614
|
Sat Feb 8 15:14:18 2014 |
ericq | Update | LSC | PRM Sideband Splitting | [ericq]
Today, I kicked the PRM to see the
sideband splitting in POP110. |
|
|
9627
|
Wed Feb 12 14:05:16 2014 |
ericq | Update | SUS | PRM Oplev Checked Out | [ericq]
Steve fixed the PRM oplev pointing.
I turned on the loops and measured the OLG, |
|
|
9637
|
Fri Feb 14 02:09:55 2014 |
ericq | Update | Electronics | Transmon QPD whitening | [Quick post, will follow up with
further detail later. Excuse my sleepy ELOG
writing] |
|
|
9642
|
Mon Feb 17 20:35:19 2014 |
ericq | Update | Electronics | Transmon QPD whitening | My apologies for all of that crap I left
at the Y-end... I cleaned the rest of it
up today. |
|
|
9654
|
Wed Feb 19 11:00:16 2014 |
ericq | Update | LSC | Some Simulation Efforts | Q EDIT: THIS
IS WRONG. I LOCKED PRC ON THE CARRIER
As
Koji measured the other day: MICH and |
|
|
9656
|
Wed Feb 19 14:14:46 2014 |
ericq | Update | LSC | Some Simulation Efforts | Q EDIT: THIS
IS WRONG. I LOCKED PRC ON THE CARRIER
Koji
noted oddities in the sensing matrix results |
|
|
9657
|
Wed Feb 19 16:42:08 2014 |
ericq | Update | LSC | Some Simulation Efforts | Disregard previous
ELOGs, I had the PRC locked on carrier |
|
|
9660
|
Fri Feb 21 12:45:57 2014 |
ericq | Update | LSC | Equivalent Displacement Noise from QPD Dark Noise in SQRTINV | EQ UPDATE: Measured it wrong the first
time, fixed now.
I measured the spectra of the SQRTINV |
|
|
9670
|
Tue Feb 25 14:48:49 2014 |
ericq | Update | LSC | Changing PRCL offset changes REFL 165 degeneracy | After speaking with Jenne and Gabriele,
I did a little bit of simulating based on
my earlier code that looked at the angle |
|
|
9671
|
Tue Feb 25 16:07:33 2014 |
ericq | Update | LSC | Changing PRCL offset changes REFL 165 degeneracy | And glossing over the MICH offset,
here's the PRC offset plots in displacement,
rather than radians. |
|
|
9692
|
Wed Mar 5 16:27:51 2014 |
ericq | Update | LSC | Preliminary Arm Loss Measurements | I measured the arm cavity losses as Kiwamu
did way back in ELOG
5074. |
|
|
9693
|
Wed Mar 5 18:04:36 2014 |
ericq | Update | LSC | Equivalent Displacement Noise from QPD Dark Noise in SQRTINV | At today's meeting, it was suspected that
these noise levels were far too low. (ELOG |
|
|
9710
|
Mon Mar 10 21:14:58 2014 |
ericq | Summary | LSC | Composite Error Signal for ARms (3) | Using Koji's mathematica notebook, and
Nic's python work, I set out to run a time
domain simulation of the error signal, with |
|
|
9714
|
Tue Mar 11 15:01:28 2014 |
ericq | Update | Computer Scripts / Programs | MC Signal Monitoring | Two weeks ago (Feb 26) I took the "Q
MON" output of the demodulator that
sends its Q output to the MC servo board |
|
|
9720
|
Tue Mar 11 19:07:24 2014 |
ericq | Update | Electronics | High gain Trans PD electronics change | Speaking of the whitening board, I had
neglected to post details showing the the
whitening was at least having a positive |
|
|
9742
|
Fri Mar 21 01:54:32 2014 |
ericq | Update | LSC | Some early CARM modeling | I've been getting a simulation going
with the eventual goal of simulating CESAR-type
signals for CARM. So for I've only been using |
7x |
|
9751
|
Wed Mar 26 11:16:59 2014 |
ericq | Summary | LSC | Composite Error Signal for ARms (3) | Extending the previous model, I've closed
a rudimentary CESAR loop in simulink. Error
signals with varying noise levels are combined |
|
|
9754
|
Wed Mar 26 21:51:42 2014 |
ericq | Summary | LSC | PRMIsb locked with REFL165I&Q again | Incidentally, while messing around with
transfer functions and sensing matrix elements
this evening, I was able to sideband lock |
|
|
9756
|
Thu Mar 27 10:34:39 2014 |
ericq | Update | General | Recovery |
|
|
|
9767
|
Mon Mar 31 17:47:57 2014 |
ericq | Summary | LSC | MICH sensing oddities in REFL 3F | Last week, while I had the PRMI locked
on REFL33, I did some poking around with
mirror excitation to RFPD quadrature transfer |
|
|
9783
|
Thu Apr 3 18:09:54 2014 |
ericq | Update | LSC | Attempt at PRMI+2 arms | So, here's the basic: "We reduced
the CARM offset and saw more TRY" plot.
|
|
|
9784
|
Thu Apr 3 18:55:10 2014 |
ericq | Summary | LSC | Some CARM related modeling | The other day, Jenne and I were comparing
my MIST simulation to her Optickle simulation
for the CARM transfer functions I posted |
|
|
9785
|
Fri Apr 4 18:51:29 2014 |
ericq | Summary | LSC | MORE CARM related modeling | In today's ISC call, Kiwamu was comparing
two ways to approach resonance:
"C-Type": The |
9x |
|
9801
|
Fri Apr 11 12:32:33 2014 |
ericq | Update | LSC | CARM and DARM both on IR signals!!!!!!!!! |
|
|
|
9811
|
Tue Apr 15 02:26:45 2014 |
ericq | Update | LSC | Analog phasing of REFL11 and REFL55 | For future reference:
As we were poking around with the
common mode servo in an FPMI configuration, |
|
|
9818
|
Wed Apr 16 02:29:30 2014 |
ericq | Update | LSC | CARM and DARM on IR signals, boosts engaged | As Jenne mentioned, we took OLTF
transfer functions, and determined that we
had more than enough phase margin to switch |
|
|
9827
|
Thu Apr 17 17:27:32 2014 |
ericq | Update | LSC | Some reference Plots | Jenne made some suggestions for some plots
that would be useful on our CARM offset reduction
adventures, so I made some with my MIST model. |
|
|
9833
|
Sun Apr 20 18:15:37 2014 |
ericq | Update | IOO | Cleaner Cleanup | Came in, and the PMC and MC needed aligning.
PMC Trans .74->.83
I wasn't able to move the MC1&3 |
|
|
9840
|
Tue Apr 22 02:14:55 2014 |
ericq | Update | LSC | lock acquisition path for the CM servo | In an effort to familiarize myself with
the analog CM servo, I've begun to replicate
Koji and Den's work from the ELOG post that |
|
|
9850
|
Thu Apr 24 16:25:31 2014 |
ericq | Update | LSC | Quick CM servo prep | I added ~1m of cable to the LO side of
the REFL11 Demodulator, which brought its
PRCL demod phase to about 8 degrees. According |
|
|
9853
|
Fri Apr 25 03:14:46 2014 |
ericq | Update | LSC | locking activity | [ericq, Jenne, Zach]
We spent some time tonight trying
to push our CARM locking further, to little |
|