ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1765
|
Mon Jul 20 17:06:29 2009 |
Jenne | Update | PEM | Guralp Box Fail | [quote]That's terrible: R5 & R8 should definitely
be 100 Ohm and not 100kOhm. 100k would make
it a noise disaster. They should also be |
|
|
1766
|
Tue Jul 21 01:11:30 2009 |
Dmass | AoG | Computers | Alarms going off | I came into the 40m to sign things out
briefly then swiftly return them, and the
alarms were going off on op540m at 1am. |
|
|
1767
|
Tue Jul 21 13:55:08 2009 |
Clara | Update | PEM | Guralp Box Success! | There managed to be just enough 100 kOhm
resistors to stuff all the "2"
channels (VERT2, N/S2, E/W2) with the fancy |
|
|
1768
|
Tue Jul 21 15:32:47 2009 |
Jenne | Update | IOO | MC_L flatlined | [Clara, Jenne]
While Clara was working on her Wiener
filtering and optimizing the locations of |
|
|
1769
|
Tue Jul 21 17:01:18 2009 |
pete | DAQ | DAQ | temp channel PEM-PETER_FE | I added a temporary channel, to input 9
on the PEM ADCU. Beware
the 30, 31, and 32 inputs. I tried |
|
|
1770
|
Tue Jul 21 17:52:12 2009 |
Jenne | Update | IOO | MC_L flatlined |
|
|
|
1771
|
Tue Jul 21 18:46:47 2009 |
steve | Configuration | Computers | computers are down | All suspentions are kicked up. Sus dampings
and oplev servos turned off.
c1iscey and c1lsc are down. c1asc |
|
|
1772
|
Wed Jul 22 01:57:19 2009 |
Alberto | Configuration | Computers | computers are down |
|
|
|
1773
|
Wed Jul 22 09:04:10 2009 |
Alberto | Configuration | Computers | computers are down |
|
|
|
1774
|
Wed Jul 22 10:49:40 2009 |
Alberto | Update | PSL | MC Alignment Trend | Trying to track the MC positions back for
a few days, it seems that the data hasn't
been recorded properly for a while. Something |
|
|
1775
|
Wed Jul 22 11:08:36 2009 |
Stephanie | Update | General | Multiply Resonant EOM Update | I have built a version of the circuit with
flying components; the completed circuit
is shown in the attached picture. I built |
|
|
1776
|
Wed Jul 22 11:14:11 2009 |
Alberto | Configuration | Computers | computers are down |
|
|
|
1777
|
Wed Jul 22 11:18:49 2009 |
rob | Configuration | Computers | sticky sliders |
|
|
|
1778
|
Wed Jul 22 14:44:57 2009 |
Zach | Update | Cameras | GigE Phase Camera | This past week, I have mostly been debugging
my software. I have tried to use the
fluorescent lights to test the camera, but |
|
|
1779
|
Wed Jul 22 16:15:52 2009 |
Chris Zimmerman | Update | General | Week 5/6 Update | The last week I've started setting up the
HeNe laser on the PSL table and doing some
basic measurements (Beam waist, etc) with |
|
|
1780
|
Wed Jul 22 18:04:14 2009 |
rob | Omnistructure | Computers | weird noise coming from Gigabit switch | in the rack next to the printer.
It sounds like a fan is hitting something. |
|
|
1781
|
Wed Jul 22 20:11:26 2009 |
pete | Update | Computers | RCG front end | I compiled and ran a simple (i.e. empty)
front end controller on scipe12 at wilson
house. I hooked a signal into the ADC |
|
|
1782
|
Thu Jul 23 07:34:45 2009 |
Aidan | Update | CDS | Added C2 MEDM screens to 40m SVN. |
See Adhikari eLOG entry: http://nodus.ligo.caltech.edu:8080/AdhikariLab/194 |
|
|
1783
|
Thu Jul 23 10:05:38 2009 |
Alberto | Update | PSL | Summary of the latest adventures with the alignment of the mode cleaner |
|
|
|
1784
|
Thu Jul 23 20:30:23 2009 |
Alberto | Update | PSL | Beam aligned to the Farady | After yesterday's changes in the MC cavity
state today it was necessary to optimize
the alignment to the Faraday. |
|
|
1785
|
Fri Jul 24 11:04:11 2009 |
Alberto | Configuration | Computers | elog restarted | This morning I found the elog down. I restarted
it using the procedure in the wiki. |
|
|
1786
|
Fri Jul 24 17:20:48 2009 |
Jenne | Update | oplevs | ETMY oplev is iffy | ETMY oplev is currently a work in progress.
The HeNe beam is hitting the photodiode,
but the spot size there is pretty much the |
|
|
1787
|
Fri Jul 24 17:47:52 2009 |
Stephanie | Update | General | Multiply Resonant EOM Update | After speaking with Rana and realizing
that it would be better to use smaller inductances
in the flying-component circuit (and after |
|
|
1788
|
Fri Jul 24 21:02:46 2009 |
Alberto | Update | PSL | Aligning the beam to the Faraday | This afternoon I kept working on the alignment
of the beam so that it matches at the same
the PSL periscope, the Mode Cleaner and the |
|
|
1789
|
Sat Jul 25 13:34:58 2009 |
Koji | Update | General | Week 5/6 Update |
|
|
|
1790
|
Sat Jul 25 13:49:28 2009 |
Koji | Update | General | Multiply Resonant EOM Update |
|
|
|
1791
|
Sat Jul 25 16:04:32 2009 |
rob | Update | PSL | Aligning the beam to the Faraday |
|
|
|
1792
|
Sat Jul 25 19:04:01 2009 |
Koji | Update | PSL | Aligning the beam to the Faraday |
|
|
|
1793
|
Sun Jul 26 13:19:54 2009 |
rana | Update | PSL | Aligning the mode cleaner | I set the MC back to its good alignment
(June 21st) using this
procedure. The trend of the OSEM values |
|
|
1794
|
Sun Jul 26 16:05:17 2009 |
Alberto | Update | PSL | Aligning the mode cleaner |
|
|
|
1795
|
Mon Jul 27 09:34:07 2009 |
steve | Summary | IOO | Aligning the mode cleaner |
|
|
|
1796
|
Mon Jul 27 14:12:14 2009 |
rana | Summary | SUS | TM Coil Noise Spectra | Rob noticed that the ITMY DAC channels were
saturating occassionally. Looking at the
spectrum we can see why.
|
|
|
1797
|
Mon Jul 27 14:43:34 2009 |
Chris | Update | | Photodetectors | I found two ThorLabs PDA55 Si photodetectors
that says detect visible light from DC to
10MHz that I'm going to use from now on. |
|
|
1798
|
Mon Jul 27 17:48:44 2009 |
Jenne | Update | oplevs | ETMY oplev is still down for the count | ETMY oplev is still out of order.
Hopefully I'll get it under control by tomorrow. |
|
|
1799
|
Mon Jul 27 19:55:19 2009 |
Koji | HowTo | IOO | Lens selection: plano-convex? or bi-convex? | Q. When should we use plano-convex lenses,
and when should we use bi-convex?
As I had the same question from Jenne |
|
|
1800
|
Tue Jul 28 16:03:14 2009 |
Clara | Update | PEM | Guralp Seismometer cable pin diagram | I mapped out the corresponding pins on
both ends of the Guralp seismometer cable.
Here is the diagram: |
|
|
1801
|
Tue Jul 28 18:32:21 2009 |
Koji | Update | CDS | RCG work | Peter and Koji,
We are constructing a setup for the |
|
|
1802
|
Wed Jul 29 11:15:06 2009 |
steve | Bureaucracy | SAFETY | Kevin receives safety training | Kevin Vigue, our high school summer student
went through the 40m specific safety traning
yesterday. |
|
|
1803
|
Wed Jul 29 11:58:57 2009 |
Alberto | Update | PSL | MC not locking | This morning I found the Mode Cleaner unlocked.
I check the sliders for the mirrors
bias and they have not changed. Also the |
|
|
1804
|
Wed Jul 29 12:00:49 2009 |
Stephanie | Update | General | Multiply Resonant EOM Update | For the past couple of days I have been
trying to understand and perform Koji's
method for impedance measurement using |
|
|
1805
|
Wed Jul 29 12:14:40 2009 |
pete | Update | Computers | RCG work | Koji, Pete
Yesterday, Jay brought over the IO
box for megatron, and got it working. |
|
|
1806
|
Wed Jul 29 13:15:35 2009 |
Clara | Update | PEM | Dents = Bad?? | I was in the lab last night accelerometerizing
and noticed some dents on the tubes that
stick out horizontally from the MC2 optical |
|
|
1807
|
Wed Jul 29 14:22:33 2009 |
Zach | Update | Cameras | GigE Phase Camera | This week, Joe and I have been setting
up the laser and optics. The mephisto
laser is emitting a very ugly beam that we |
|
|
1808
|
Wed Jul 29 14:56:44 2009 |
Jenne | Update | PEM | MiniEarthquakes due to construction | The construction people next door seem
to be getting pretty excited about pounding
things lately. At my desk the floor |
|
|
1809
|
Wed Jul 29 19:31:17 2009 |
rana | Configuration | Computers | elog restarted | Just now found it dead. Restarted it. Is
our elog backed up in the daily backups? |
|
|
1810
|
Wed Jul 29 19:41:58 2009 |
Chris | Configuration | General | EUCLID-setup configuration change | David and I were thinking about changing
the non-polarizing beam splitter in the EUCLID
setup from 50/50 to 33/66 (ref picture). |
|
|
1811
|
Wed Jul 29 19:46:04 2009 |
rana, alberto | Update | PEM | Dents = Bad?? | [B]It looks like the MC2 chamber and/or stack
has been jarred and shifted. Please be careful
and use much less force and speed around |
|
|
1812
|
Thu Jul 30 03:10:18 2009 |
rob | Update | IOO | MC tweaked further | I tilted the periscope beam and aligned
the MC. Now the spot at the Faraday
entrance is near the center of the aperture |
|
|
1813
|
Thu Jul 30 19:55:23 2009 |
Koji | Update | General | Multiply Resonant EOM Update |
|
|
|
1814
|
Thu Jul 30 21:26:16 2009 |
rana | Update | IOO | MC Drumhead mode | I used COMSOL 3.5a to do a FEA of one of the
MC flat mirrors. Should be close to the same
for all the mirrors.
|
|