| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
9793
|
Thu Apr 10 01:56:05 2014 |
Jenne | Update | LSC | CARM transitioned to IR error signals! | [Jenne, EricQ]
This |
|
|
9792
|
Wed Apr 9 16:08:33 2014 |
Jenne | Update | LSC | CARM loop gains vs. CARM offset | I have taken EricQ's simulation results
for the CARM plant change vs. CARM offset,
and put that together with the CM and CARM |
8x |
|
9791
|
Wed Apr 9 02:34:20 2014 |
Jenne | Update | LSC | Jumping over the CARM resonance point | Koji was right, and I was using much too
large of a CARM offset. |
|
|
9790
|
Tue Apr 8 23:04:14 2014 |
manasa | Update | LSC | arm length measurements |
|
|
|
9789
|
Tue Apr 8 19:10:39 2014 |
rana | Update | LSC | arm length measurements | Since we don't have an arm length
precision measurement (i.e. better than centimeters),
why not just do as Koji suggests and use |
|
|
9788
|
Tue Apr 8 10:44:53 2014 |
Koji | Update | LSC | Playing with PRMI + 2 arms | I vaguely remember that the ALS count (Phase
Tracker output) is converted to Hz@532nm
by a factor ~20kHz/cnt. |
|
|
9787
|
Tue Apr 8 01:58:53 2014 |
Jenne | Update | LSC | Playing with PRMI + 2 arms | I played around with the PRMI + 2 arms
situation again this evening. (I'm
not ready to call it "PRFPMI" until |
|
|
9786
|
Mon Apr 7 15:26:32 2014 |
jamie, ericq | Update | CDS | aborted attempt to update c1sus machine with second CPU | This morning we attempted to replace the
c1sus front end machine with a spare that
had been given a second CPU, and therefore |
|
|
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 |
|
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 |
|
|
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.
|
|
|
9782
|
Thu Apr 3 17:05:52 2014 |
Steve | Update | VAC | Maglev controller swapped |
|
|
|
9781
|
Thu Apr 3 03:06:34 2014 |
Jenne | Update | LSC | Attempt at PRMI+2 arms | [EricQ, Jenne]
Much more success later!
We've had the arms locked on ALS |
|
|
9780
|
Thu Apr 3 00:30:52 2014 |
Jenne | Update | LSC | Attempt at PRMI+2 arms | [EricQ, Jenne]
We started out this evening by
locking the PRMI, on different REFL PDs, |
|
|
9779
|
Wed Apr 2 23:08:51 2014 |
Koji | Summary | ASC | New PRM ASC is running | The new PRM ASC design
Pitch
FM1: zero at 0Hz, pole at 2000Hz, |
|
|
9778
|
Wed Apr 2 20:13:04 2014 |
Jenne | Update | PEM | More Chile EQs | 2 more earthquakes in Chile: a M6.4
and a M7.8.
We got them about 15 minutes ago |
|
|
9777
|
Wed Apr 2 19:50:12 2014 |
Koji | Summary | ASC | New PRM ASC is running | As the designed ASC filters in this
entry had too little phase margins (~10deg),
I had to compromise the servo design. |
|
|
9776
|
Wed Apr 2 16:34:15 2014 |
Steve | Update | VAC | Maglev controller needs service |
|
|
|
9775
|
Wed Apr 2 09:31:22 2014 |
Steve | Update | PEM | local 3.0M earthquake |
|
|
|
9774
|
Wed Apr 2 01:18:30 2014 |
Jenne | Update | LSC | Attempt at PRMI+2 arms | I was trying to lock PRMI+2 arms, but I'm
losing patience with the MC losing lock.
It's mostly well-behaved, but every now and |
|
|
9773
|
Tue Apr 1 22:03:44 2014 |
Koji | Summary | ASC | New PRM ASC is running | [Koji Jenne]
New PRM ASC was implemented. [to
be cnt'd] |
|
|
9772
|
Tue Apr 1 21:45:01 2014 |
Jenne | Summary | LSC | PRM violin notch not at correct freq? | Koji and I have the PRMI locked right now,
and we hear a very strong violin mode ringing
up, at 628Hz. This is, according to |
|
|
9771
|
Tue Apr 1 20:56:27 2014 |
Jenne | Update | PEM | No noticeable effect from Chile's M8.2 earthquake | Koji locked the MC, arms, and PRMI, with
no troubles, after the M8.2 earthquake off
the coast of Chile, that happened about 4 |
|
|
9770
|
Tue Apr 1 17:37:57 2014 |
Evan | Update | Computer Scripts / Programs | Comsol 4.4 upgrade | Comsol 4.4 is now installed under /cvs/cds/caltech/apps/linux64/COMSOL44.
I've left the other installations alone. |
|
|
9769
|
Mon Mar 31 23:57:22 2014 |
Koji | Summary | ASC | PRM ASC characterization / design | A
series of measurements / calculations for
the PRM ASC characterization and servo design |
7x |
|
9768
|
Mon Mar 31 21:23:30 2014 |
Gabriele | Summary | LSC | MICH sensing oddities in REFL 3F |
|
|
|
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 |
|
|
9766
|
Mon Mar 31 13:26:23 2014 |
manasa | Update | LSC | LSC model modified | I have included Yarm CESAR to the LSC model.
It was just a copy paste of the Xarm CESAR.
Since we are now meditating about implementing |
|
|
9765
|
Mon Mar 31 13:15:55 2014 |
manasa | Summary | LSC | Alignment update |
|
|
|
9764
|
Mon Mar 31 11:34:00 2014 |
manasa | Summary | IOO | MC2 moved |
|
|
|
9763
|
Mon Mar 31 08:11:00 2014 |
Steve | Update | SUS | recovery from earthquakes |
|
|
|
9762
|
Sat Mar 29 00:11:39 2014 |
Koji | Configuration | General | NTP setting on nodus | FB: /etc/ntp.conf was updated as
below such that it refers nodus and also
caltech server when nodus is not available |
|
|
9761
|
Fri Mar 28 23:28:13 2014 |
Koji | Configuration | General | NTP setting on nodus | [Koji Rana]
We are looking at NTP settings. I
looked at nodus. |
|
|
9760
|
Fri Mar 28 22:10:00 2014 |
rana, koji | Update | SUS | recovery from | * EQ Southeast of LA around 45 minutes
ago. Callum and I felt it.
|
|
|
9759
|
Fri Mar 28 20:23:02 2014 |
rana | Summary | IOO | MC2 moved | I aligned MC2 suspension by 0.01 in pit
and yaw to align the MC better to the PSL
beam. Then I turned the WFS back on. The |
|
|
9758
|
Fri Mar 28 17:22:55 2014 |
Koji | Summary | LSC | PRMIsb locked with REFL165I&Q again | While I'm looking at the PRM ASC servo
model, I tried to use the current servo
filters for the ASC |
|
|
9757
|
Fri Mar 28 16:26:20 2014 |
steve | Update | VAC | RGA scan after power failure |
|
|
|
9756
|
Thu Mar 27 10:34:39 2014 |
ericq | Update | General | Recovery |
|
|
|
9755
|
Wed Mar 26 22:22:43 2014 |
Manasa | Update | General | Recovery | The following
that went unnoticed from yesterday were recovered
today: |
|
|
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 |
|
|
9753
|
Wed Mar 26 14:54:32 2014 |
Koji | Summary | LSC | PRMIsb locked with REFL165I&Q again | [Manasa, Eric, Koji]
PRMIsb
was locked with REFL165I&Q. |
|
|
9752
|
Wed Mar 26 11:30:07 2014 |
Koji | Update | General | Power Failure | Recovery work: now arms are locking as usual
- FB is failing very frequently. |
|
|
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 |
|
|
9750
|
Tue Mar 25 16:11:24 2014 |
Koji | Update | General | Power Failure | As far as I know the system is running
as usual. I had the IMC locked and one of
the arm flashing. |
|
|
9749
|
Tue Mar 25 14:52:57 2014 |
steve | Update | VAC | vacuum is recovered | Out
gassing plus leak rate 0.15 |
|
|
9748
|
Mon Mar 24 22:13:37 2014 |
steve | Update | General | Power Failure |
|
|
|
9747
|
Mon Mar 24 21:36:28 2014 |
Koji | Update | General | Power Failure | I'm checking the status from home.
P1 is 8e-4 torr
nodus did not feel the power outage |
|
|
9746
|
Mon Mar 24 19:42:12 2014 |
Charles | Frogs | VAC | Power Failure | The 40m experienced a building-wide
power failure for ~30 seconds at ~7:38 pm
today. |
|
|
9745
|
Mon Mar 24 10:41:46 2014 |
Steve | Update | VAC | RGA scan at day 50 |
|
|
|
9744
|
Sun Mar 23 14:20:07 2014 |
rana | HowTo | LSC | BLRMS screens | We should make screens like this
for the LSC signals, errors, ALS, etc. |
|