| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1815
|
Fri Jul 31 09:52:38 2009 |
Stephanie | Update | General | Multiply Resonant EOM Update | I was able to make an impedance measurement
of the flying-component circuit using Koji's |
|
|
1816
|
Fri Jul 31 11:04:42 2009 |
Stephanie | Update | General | Multiply Resonant EOM Update | I put the flying-component circuit in a
box; a photo is attached. I also measured
the impedance; it looks exactly the same |
|
|
1817
|
Mon Aug 3 01:08:20 2009 |
Alberto | Update | PSL | MC unlocked | Friday afternoon the mode cleaner got unlocked.
Then some adjustment of the MC1 bias sliders
locked it again. The driftmon showed the |
|
|
1818
|
Mon Aug 3 12:57:09 2009 |
Alberto | Update | PSL | MC unlocked |
|
|
|
1819
|
Mon Aug 3 13:47:42 2009 |
pete | Update | Computers | RCG work | Alex has firewalled megatron. We
have started a framebuilder there and added
testpoints. Now it is possible to take |
|
|
1820
|
Mon Aug 3 14:15:50 2009 |
Jenne | Update | IOO | WFS recentered | I am (was) able to get the mode cleaner
mostly locked, but because WFS2 wasn't centered,
the MC would drift, then lose lock. |
|
|
1821
|
Mon Aug 3 14:47:53 2009 |
Jenne | Update | IOO | MC locks again | The mode cleaner seems to be locking again.
I've manually unlocked it a few times in
the past 20min, and most of the time it catches |
|
|
1822
|
Mon Aug 3 18:56:59 2009 |
Zach | Update | Cameras | GigE Phase Camera | While aligning the optics, we tried to
start up the CCD. Although nothing
should have changed since the last time I |
|
|
1823
|
Mon Aug 3 22:54:53 2009 |
Jenne, Koji, rana | Update | IOO | MC_trans is now better, but not best | Jenne, Koji,
Rana |
|
|
1824
|
Tue Aug 4 11:45:29 2009 |
Zach | Update | Cameras | GigE Phase Camera | The camera wasn't working because the router
has no built-in dhcp server. We had
to manually start the server after rebooting |
|
|
1825
|
Tue Aug 4 11:54:20 2009 |
Jenne | Update | IOO | MC_trans readout on LOCK_MC screen now normalized | The MC_trans QPD Pitch and Yaw readout
on the Lock_MC screen are now normalized
by the trans_sum. I used the method described |
|
|
1826
|
Tue Aug 4 13:40:17 2009 |
pete | Update | Computers | RCG work - rate | Koji, Pete
Yesterday we found that the channel |
|
|
1827
|
Tue Aug 4 15:48:25 2009 |
Jenne | Update | Computers | mini boot fest | Last night Rana noticed that the overflows
on the ITM and ETM coils were a crazy huge
number. Today I rebooted c1dcuepics, |
|
|
1828
|
Tue Aug 4 16:12:27 2009 |
rob | Update | Computers | mini boot fest |
|
|
|
1829
|
Tue Aug 4 17:51:25 2009 |
pete | Update | Computers | RCG work | Koji, Peter
We put a simple pendulum into the |
|
|
1830
|
Tue Aug 4 23:03:56 2009 |
alberto | Update | Locking | IFO Alignment | After the mini boot fest that Jenne did
today, I checked whether that fixed the overflow
issues we yesterday prevented the alignemnt |
|
|
1831
|
Wed Aug 5 07:33:04 2009 |
steve | DAQ | Computers | fb40m is down | |
|
|
1832
|
Wed Aug 5 09:25:57 2009 |
Alberto | DAQ | Computers | fb40m is up | FB40m up and running again after restarting
the DAQ. |
|
|
1833
|
Wed Aug 5 09:48:05 2009 |
alberto | Update | Locking | IFO Alignment |
|
|
|
1834
|
Wed Aug 5 11:49:49 2009 |
Stephanie | Update | General | Multiply Resonant EOM Update | I have spent the past couple of days gathering
optics and mounts so that I can observe the
modulation of the EOM attached to the circuit |
|
|
1835
|
Wed Aug 5 15:18:12 2009 |
Stephanie | Update | General | Multiply Resonant EOM Update |
|
|
|
1836
|
Wed Aug 5 15:33:05 2009 |
rob, alberto | DAQ | General | can't get trends | We can't read minute trends from either
Dataviewer or loadLIGOData from before 11am
this morning. |
|
|
1837
|
Wed Aug 5 15:57:05 2009 |
Alberto | Configuration | Computers | PMC MEDM screen changed | I added a clock to the PMC medm screen.
I made a backup of the original file
in the same directory and named it *.bk20090805 |
|
|
1838
|
Wed Aug 5 16:33:50 2009 |
steve | Configuration | PSL | new PSL output iris | I installed an improvised version of PSL
output beam iris at the output periscope
last week. |
|
|
1839
|
Wed Aug 5 17:41:54 2009 |
pete | Update | Computers | RCG work - daq fixed | The daq on megatron was nuts. Alex
and I discovered that there was no gds installation
for site_letter=C (i.e. Caltech) so the default |
|
|
1840
|
Thu Aug 6 09:05:29 2009 |
steve | Update | VAC | large O-rings of vacuum envelope | The 40m-IFO vacuum envelope doors are sealed
with dual viton O-rings and they are pumped
through the annulos lines. |
|
|
1841
|
Thu Aug 6 09:22:17 2009 |
Alberto | DAQ | General | can't get trends |
|
|
|
1842
|
Thu Aug 6 09:33:08 2009 |
alberto | Update | Locking | FSS Transmitted and Reflected Power Trends | I've now also trended the MOPA output
power for the last 200 days to check a possible
correlation with the FSS reflected power. |
|
|
1843
|
Thu Aug 6 10:32:45 2009 |
alberto, rob | Update | Locking | More PSL trends: NPRO, MOPA, FSS, PMC and MZ | Here we trended also the PMC and
the MZ. The drop in the PMC happens at the
same rate as the MOPA's. |
|
|
1844
|
Thu Aug 6 17:45:37 2009 |
Jenne | Update | PSL | HEPAs on high | Stephanie has needed the doors to the PSL
open all day, and still has them open, so
I just turned the HEPAs on high. |
|
|
1845
|
Thu Aug 6 17:51:21 2009 |
Chris | Update | General | Displacement Sensor Update | For the past week Dmass and I have been
ordering parts and getting ready to construct
our own modified version of EUCLID (figure). |
|
|
1846
|
Thu Aug 6 18:21:03 2009 |
Chris | Update | General | Displacement Sensor Update |
|
|
|
1847
|
Thu Aug 6 18:26:26 2009 |
Jenne | Update | PSL | Ref Cav and PMC aligned | [Alberto, Jenne]
We aligned both the reference cavity
and the PMC, each by looking at their Trans |
|
|
1848
|
Thu Aug 6 19:54:04 2009 |
Stephanie | Update | PSL | HEPAs back to normal |
|
|
|
1849
|
Thu Aug 6 20:03:10 2009 |
Koji | Update | General | We left two carts near PSL table. | Stephanie and Koji
We left two carts near the PSL table.
We are using them for characterization |
|
|
1850
|
Thu Aug 6 23:29:47 2009 |
Jenne | Update | PSL | Ref cav reflection PD is funky | After Alberto and I worked on aligning
the reference cavity, Rob asked the important
and useful question: what is the visibility |
|
|
1851
|
Fri Aug 7 00:10:14 2009 |
rana | Update | PSL | Ref cav reflection PD is funky | we have a tester cable, but you don't want
it. Instead the problem is probably at the
cross-connect. The D-cable goes to a cross-connect |
|
|
1852
|
Fri Aug 7 09:50:57 2009 |
steve | Configuration | VAC | IFO pressure rose to 2.3 mTorr | IFO pressure was 2.3 mTorr this morning,
The Maglev's foreline valve
V4 was closed so P2 rose to 4 Torr. The Maglev |
|
|
1853
|
Fri Aug 7 11:39:13 2009 |
Alberto | Update | PSL | MZ Alignment | For the last couple of days we've been
trying to find the cause that is preventing
us to get more than 0.85 for the arm power.
After |
|
|
1854
|
Fri Aug 7 13:42:12 2009 |
ajw | Omnistructure | Computers | backup of frames restored | Ever since July 22, the backup script that
runs on fb40m has failed to ssh to ldas-cit.ligo.caltech.edu |
|
|
1855
|
Fri Aug 7 14:31:39 2009 |
Alberto | Update | PSL | DAQ REstarted | For some reason a few minutes ago the FB
DAQ crashed and I had to restarted. |
|
|
1856
|
Fri Aug 7 16:00:17 2009 |
pete | Update | Computers | RCG work. MDC MDP open loop transfer function | Today I was able to make low frequency
transfer function with DTT on megatron.
There seems to have been a timing problem, |
|
|
1857
|
Fri Aug 7 16:11:11 2009 |
steve, rob | Configuration | VAC | IFO pressure rose to 2.3 mTorr |
|
|
|
1858
|
Fri Aug 7 16:14:57 2009 |
rob | Omnistructure | VAC | UPS failed | Steve, Rana, Ben, Jenne, Alberto, Rob
UPS in the vacuum rack failed this |
|
|
1859
|
Fri Aug 7 16:53:35 2009 |
Clara | Update | PEM | Guralp breakout box noise, finally | After many issues, I finally have some
Guralp box noise. I did not measure every
single channel with high resolution at the |
|
|
1860
|
Fri Aug 7 17:05:34 2009 |
Jenne | Update | PSL | Ref cav reflection PD is funky |
|
|
|
1861
|
Fri Aug 7 17:46:21 2009 |
Zach | Update | Cameras | The phase camera is sort of working | Shown below are the plots of the amplitude
and phase of the Mephisto laser light modulated
with a chopper as a square wave at about |
|
|
1862
|
Fri Aug 7 17:51:50 2009 |
Zach | Update | Cameras | CMOS vs. CCD | The images that I just posted were taken
with the CMOS camera. We switched from
the CCD to the CMOS because the CCD was exhibiting |
|
|
1863
|
Fri Aug 7 18:06:24 2009 |
rob | Omnistructure | VAC | opening V1 when PTP1 is broken | We've had a devil of a time getting V1
to open, due to the Interlock code.
|
|
|
1864
|
Fri Aug 7 19:34:40 2009 |
steve | Summary | VAC | UPS failed | The Maglev is running on single phase 220V
and that voltage was not interrupted.
TP1 was running undisturbed with V1 and V4 |
|