| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
9522
|
Mon Jan 6 20:52:09 2014 |
Jenne | Update | IOO | MC1/3 kicked this morning at 8:30 | When I got in this morning at 9-something
(9:45 maybe?), Steve was taking dust photos
on the AS table, of the MC Refl path. |
|
|
9521
|
Mon Jan 6 18:32:17 2014 |
RANA | Update | IOO | MC1/3 kicked this morning at 8:30 | The trend shows a big jolt to the
MC1/3 pointing this morning at 8:30.
Was anyone working |
|
|
9520
|
Mon Jan 6 16:32:40 2014 |
Koji | Summary | General | linux1 RAID crash & recovery | Since this configuration change, the daily
backup was speeded up by factor of more than
two. |
|
|
9519
|
Mon Jan 6 16:30:31 2014 |
Jenne | Summary | PSL | PSL pointing monitoring | I'm not sure which pointing Rana wanted
to fix today, but here's a measurement of
the MC spots. They actually look pretty |
|
|
9518
|
Fri Jan 3 18:21:45 2014 |
rana | Summary | PSL | PSL pointing monitoring |
I went to the PSL table to
re-align the input pointing to the IMC. After |
|
|
9517
|
Fri Jan 3 15:19:39 2014 |
rana | Summary | PSL | PSL pointing monitoring | This |
|
|
9516
|
Fri Jan 3 11:18:41 2014 |
Steve | Summary | VAC | power supply replaced with a short vent |
|
|
|
9515
|
Thu Jan 2 13:35:06 2014 |
Koji | Update | VAC | vacuum monitor is still blank | We probably need to restart the machine,
but I didn't want to touch c1vac1 and c1vac2. |
|
|
9514
|
Thu Jan 2 10:50:24 2014 |
Steve | Update | VAC | vacuum monitor is still blank | The date is correct on this monitor.
Last stored RGA scan data Dec 20,
2013 |
|
|
9513
|
Thu Jan 2 10:15:20 2014 |
Jamie | Summary | General | linux1 RAID crash & recovery | Well done Koji! I'm very impressed
with the sysadmin skillz. |
|
|
9512
|
Wed Jan 1 15:01:29 2014 |
Koji | Summary | General | IFO recovery | IFO restart after the recovery of
linux1
Machine recovery in the following |
|
|
9511
|
Tue Dec 31 23:19:58 2013 |
Koji | Summary | General | linux1 RAID crash & recovery | Dec 22 between 6AM and 7AM, physical or
logical failure has occure on the 4th disk
in the RAID array on linux1. |
|
|
9510
|
Sat Dec 21 10:53:35 2013 |
Steve | Update | VAC | power supply replaced with a short vent-pumpdown completed | The recovery- pumpdown reached valve configuration
vacuum normal at 20 hours, cc1 7.7e-6 Torr
|
|
|
9509
|
Sat Dec 21 01:54:04 2013 |
Koji | Configuration | LSC | LSC Whitening for the DCPDs/CM servo replaced | The previous LSC whitening filters for
the DCPDs were in an unknown state (although
the transfer functions were actually measured |
|
|
9508
|
Fri Dec 20 23:00:41 2013 |
Koji | Update | VAC | power supply replaced with a short vent | I'm leaving the 40m now. IFO is aligned. Everything
look good. |
|
|
9507
|
Fri Dec 20 22:45:02 2013 |
Koji | Update | LSC | high bandwidth loop achieved for yarm | I checked the offset situation in the CM
servo boost circuit.
- The offset voltage on the CM servo |
|
|
9506
|
Fri Dec 20 20:04:01 2013 |
Steve | Update | VAC | power supply replaced with a short vent |
|
|
|
9505
|
Fri Dec 20 18:00:02 2013 |
Koji | Summary | CDS | RCG parsing bug? | The bug is still there but the incorrect
bits are now overridden. |
|
|
9504
|
Fri Dec 20 17:41:25 2013 |
Steve | Update | General | Projector - lightbulb replaced | The lamp lasted for 4,622 hours.
This time I purchased just the bare
lamp itself . The housing doubles the price. |
|
|
9503
|
Fri Dec 20 11:40:13 2013 |
Jamie | Summary | CDS | RCG parsing bug? | I submitted a bug report for this:
https://bugzilla.ligo-wa.caltech.edu/bugzilla3/show_bug.cgi?id=553
However, given how old our RCG version |
|
|
9502
|
Fri Dec 20 10:08:43 2013 |
Jamie | Configuration | General | netgpibdata is working again now |
|
|
|
9501
|
Fri Dec 20 03:34:40 2013 |
Koji | Update | LSC | high bandwidth loop achieved for yarm | This
too huge offset difference with/without "BOOST"
switch should be checked. |
|
|
9500
|
Fri Dec 20 03:31:07 2013 |
Koji | Update | LSC | lock acquisition path for the CM servo | up/down scripts are to be made
(Offset Edit on Dec 20 10:38PM)
Configuration: |
|
|
9499
|
Fri Dec 20 01:24:11 2013 |
Den | Update | LSC | high bandwidth loop achieved for yarm | Koji, Den
CM Servo with |
|
|
9498
|
Fri Dec 20 00:16:39 2013 |
Koji | Summary | CDS | RCG parsing bug? | A
while ago, I noticed that the most significant
bits of the LSC whitening DOs are not toggling. |
|
|
9497
|
Thu Dec 19 21:16:16 2013 |
Koji | Configuration | General | netgpibdata is working again now | Now
netgpibdata is working again.
Usage: |
|
|
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. |
|
|
9495
|
Thu Dec 19 18:33:25 2013 |
Gabriele | Summary | LSC | Estimate of the sign of the PRC length error | Maybe I'm getting confused,
but I still believe there is no way to decide
the direction from yesterday's measurement. |
|
|
9494
|
Thu Dec 19 14:40:42 2013 |
Koji | Update | CDS | RFM Time over mitigation for c1mcs | I worked on the mitigation of c1mcs time-over
issue this afternoon.
The |
|
|
9493
|
Thu Dec 19 12:51:57 2013 |
Jenne | Summary | LSC | Estimate of the sign of the PRC length error | My hunch is that the PRC is SHORT
by a few cm, not long.
In my Optickle simulation, the sidebands |
|
|
9492
|
Thu Dec 19 03:29:34 2013 |
Den | Update | LSC | CM servo test using yarm is complete | Koji, Den
Procedure:
lock yarm on IR, wire |
|
|
9491
|
Wed Dec 18 18:45:39 2013 |
Jenne | Update | LSC | REFL 165 demod phases | I checked out the REFL165 demod phase,
and it looks like it was okay. it was
-20.9 degrees. I turned on my sensing |
|
|
9490
|
Wed Dec 18 17:28:50 2013 |
Gabriele | Summary | LSC | Estimate of the PRC length error | Measurement
Looking back at what I did in april
(see log |
|
|
9489
|
Wed Dec 18 15:35:48 2013 |
Steve | Update | PEM | excess seismic noise | This is not a test. Life can be dangerous
in the 40m Control Room. |
|
|
9488
|
Wed Dec 18 13:34:03 2013 |
Steve | Update | General | LIGOX people | 40m crew and visitor Holger Muller from
Berkeley. |
|
|
9487
|
Wed Dec 18 11:37:12 2013 |
Jenne | Update | LSC | POP22 and POP110 demod phases | Somehow the POP22 and POP110 demod phases
weren't correct anymore. I guess Den
saw this after he changed the setup for the |
|
|
9486
|
Wed Dec 18 11:32:34 2013 |
rana | Update | LSC | Xend QPD schematic investigation |
Since we use the TransMon QPD
for triggering the high/low gain switching |
|
|
9485
|
Wed Dec 18 03:29:48 2013 |
Den | Update | LSC | yarm locked on mc | As a CM slow path test I locked free swinging
yarm by actuating on MC length with bandwidth
of 200 Hz. Crossover with AO is not stable |
|
|
9484
|
Wed Dec 18 00:26:15 2013 |
Jenne | Update | LSC | Xend QPD schematic investigation | I have looked at the photo of the Xend
QPD from elog
9367, as well as the schematic for the |
|
|
9483
|
Tue Dec 17 21:28:36 2013 |
Jenne | Update | LSC | CM servo slow output digitized | Den just plugged an output from the common
mode board into an LSC whitening board (the
spare channel that used to be called "PD_XXX_I" |
|
|
9482
|
Tue Dec 17 20:59:23 2013 |
Jenne | Update | LSC | 1/sqrt(TR) signals added to frames | I noticed that we have not been saving
the 1/sqrt(TRX) and 1/sqrt(TRY) data, so
I modified the c1lsc model and added them |
|
|
9481
|
Tue Dec 17 14:06:59 2013 |
rana | Update | LSC | New Broadband PD for POP 22/110 | I looked at the BBPD design so that
we could make a POP22/110. It looks like
it will be easy (I hope). |
|
|
9480
|
Tue Dec 17 02:10:29 2013 |
Den | Update | LSC | locking activity | Koji, Den
Some results and conclusions from
tonight: |
|
|
9479
|
Mon Dec 16 20:08:43 2013 |
Koji | Update | LSC | CM servo module installed | I found another backplane cable for the
CM servo module. It is plugged to the module
now. |
|
|
9478
|
Mon Dec 16 02:20:49 2013 |
Den | Update | LSC | MICH rms is improved | When PRMI is locked on REFL 165 I&Q
signals MICH rms is dominated by the 60 Hz
line and harmonics. It comes from demodulation |
|
|
9477
|
Sun Dec 15 21:01:19 2013 |
Koji | Update | LSC | CM servo module installed | Now the module is inserted at the 2nd crate
from the top of 1Y2 (LSC analog rack). It
is next to the DCPD whitening module. |
|
|
9476
|
Sun Dec 15 20:37:41 2013 |
rana | Summary | Treasure | There is a Wagonga in the container that Steve does not believe in | From Linda and Bram: |
|
|
9475
|
Sun Dec 15 03:13:15 2013 |
Den | Update | LSC | attempt to reduce carm offset | X,Y arms were stabilized using ALS and
moved 5 nm from the resonance, PRMI was locked
on sideband using REFL165 I&Q. POP angular |
|
|
9474
|
Sat Dec 14 14:21:46 2013 |
Den | Update | LSC | common mode servo |
|
|
|
9473
|
Sat Dec 14 13:46:54 2013 |
Den | Update | IOO | low bandwidth MCL loop | Last time we designed MCL loop with UGF
~ 30 Hz and I think, it was hard to lock
the arm because of large frequency noise |
|