| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2953
|
Wed May 19 16:09:11 2010 |
josephb | Update | CDS | Racks to small for IO Chassis rails | So I discovered the hard way that the racks
are not standard width, when I was unable
to place a new IO chassis into the racks |
|
|
2952
|
Wed May 19 16:00:18 2010 |
Jenne | Update | IOO | Hooray! We locked the MC! (and some other stuff) | [Jenne, Kevin]
We opened up the MC chambers again,
and successfully got the MC locked today! |
|
|
2951
|
Wed May 19 14:36:46 2010 |
Aidan | HowTo | Phase Camera | Phase Camera algorithm and stuff | I had a think about the algorithm
we might use for the phase camera measurement.
MATLAB has an fft function that will allow |
|
|
2950
|
Tue May 18 23:03:08 2010 |
Jenne | Update | IOO | No real progress.... | [Jenne, Kevin]
No real progress today. We
opened the chambers and again tried to lock |
|
|
2949
|
Tue May 18 16:44:35 2010 |
Koji | Update | IOO | First steps toward MC mode measuring | Here is the upadted list http://lhocds.ligo-wa.caltech.edu:8000/40m/Upgrade_09/Optics
|
|
|
2948
|
Tue May 18 16:19:19 2010 |
josephb | Update | CDS | We have two new IO chassis | We have 2 new IO chassis with mounting
rails and necessary boards for communicating
to the computers. Still need boards |
|
|
2947
|
Tue May 18 15:09:02 2010 |
steve | Configuration | SAFETY | PSL output shutter in order again |
|
|
|
2946
|
Tue May 18 14:30:31 2010 |
josephb | Update | CDS | LSC.mdl problem found and fixed | After having checked old possibilities
and deciding I wasn't imagining the lsc.mdl
file not working, but working as another |
|
|
2945
|
Tue May 18 12:04:13 2010 |
rob | Update | IOO | First steps toward MC mode measuring |
|
|
|
2943
|
Tue May 18 11:54:29 2010 |
steve | Configuration | SAFETY | psl mechanical shutter is not working | As we learned yesterday, the PSL laser
power out put mechanical shutter is not working
in the remote mode. It only works in local |
|
|
2942
|
Tue May 18 01:40:56 2010 |
Koji | Update | IOO | First steps toward MC mode measuring | OK. Don't worry. This is just an initial
confusion which we also had for the suspensions
a while ago. |
|
|
2941
|
Mon May 17 19:42:11 2010 |
Jenne | Update | IOO | First steps toward MC mode measuring | [Jenne, Kevin, Steve]
We made some progress toward getting
the MC's beam profile measured. In |
|
|
2940
|
Mon May 17 17:17:49 2010 |
josephb, steve, alberto, kiwamu | Update | CDS | New CDS computers now in racks. | We placed 3 new computers in the racks.
One in 1X4 (machine running SCX) and 2 in
1Y4 (LSC and SUS). These are 1U chassis, |
|
|
2939
|
Mon May 17 10:57:16 2010 |
steve | Configuration | SUS | damping restored to ETMYs | ETMY-south sus damping was restored |
|
|
2938
|
Mon May 17 02:10:10 2010 |
Koji | Configuration | IOO | How to lock / align the MC | Let
me remind you how to lock and align the IMC
To lock |
|
|
2937
|
Sun May 16 19:25:45 2010 |
Koji | Update | Green Locking | reflected beam at PD | Don't
make a short cut. The beam size at a single
place does not tell you anything. |
|
|
2936
|
Sun May 16 12:51:08 2010 |
kiwamu | Update | Green Locking | reflected beam at PD | Mode matching
to the cavity has been done. |
|
|
2935
|
Sat May 15 04:13:33 2010 |
Koji | Summary | IOO | MC table leveled | Fixing at the next time is absolutely OK.
|
|
|
2934
|
Fri May 14 16:19:22 2010 |
Jenne | Update | PEM | Guts of a Guralp | [Jenne, Rana]
We took apart and examined one of
the Guralp seismometers this afternoon. |
|
|
2933
|
Fri May 14 16:14:37 2010 |
Kevin | Update | Green Locking | Green Laser Beam Profile |
|
|
|
2932
|
Fri May 14 12:14:26 2010 |
josephb | Update | CDS | Need to track down old code for lsc system and remove them | I'm currently in the process of tracking
down what legacy code is interfering with
the new lsc model. |
|
|
2931
|
Fri May 14 10:33:01 2010 |
Zach | Summary | IOO | MC table leveled | Ah... no, I didn't. That explains why there
were loose dogclamps on the table. I wrapped
them in foil and put them on the clean cart. |
|
|
2930
|
Fri May 14 08:18:46 2010 |
steve | Update | Green Locking | Reflection from ETM and ITM ! | I stopped AWG 1 Hz drive to ITMYs.
ITMXe was also driven or oscillating. ITMXe
damping was off, so I turned it on. It did |
|
|
2929
|
Fri May 14 03:30:45 2010 |
Koji | Summary | IOO | MC table leveled | Thanks Zach.This was a great job.
It was not mentioned but: was the
Faraday clamped down on the table? |
|
|
2928
|
Thu May 13 23:59:46 2010 |
Zach | Summary | IOO | MC table leveled | After the recent removal of the old
IMMT and the relocation of the Faraday isolator,
the MC table was tilted a bit (southward |
|
|
2927
|
Thu May 13 15:19:44 2010 |
josephb | Update | CDS | Trying to get lsc.mdl and lsp.mdl working | I had a chat with Alex this morning and
discovered that the dcu_ids 13,14,15,16 are
reserved currently, and should not be used. |
|
|
2926
|
Thu May 13 05:06:43 2010 |
rana | Update | 40m Upgrading | 216 MHz resonance in the POY11 PD killed |
This idea was tried before
by Dale in the ~1998 generation of PDs. Its |
|
|
2925
|
Wed May 12 23:31:17 2010 |
Alberto | Update | 40m Upgrading | 216 MHz resonance in the POY11 PD killed | It turned out that the resonance at 216
MHz in the 11MHz PD that I showed in the
elog entry 2902 |
|
|
2924
|
Wed May 12 17:10:16 2010 |
Alberto | Update | 40m Upgrading | RF frequency generation box - step 0 | I started putting together the components
that are coint to go inside the frequency
generation box. Here's how it looked like: |
|
|
2923
|
Wed May 12 12:58:26 2010 |
josephb | Configuration | CDS | Setup fb to handle lsc, lsp models on megatron | I modified /cvs/cds/caltech/target/fb and
changed the line "set controller_dcu=10"
to "set controller_dcu=13" (where |
|
|
2922
|
Wed May 12 12:32:04 2010 |
josephb | Configuration | CDS | Modified /etc/rc.d/rc.local on megatron | I modified the /etc/rc.d/rc.local file
on megatron removing a bunch of the old test
module names and added the new lsc and lsp |
|
|
2921
|
Wed May 12 12:25:11 2010 |
Koji | Update | Green Locking | Re: Reflection from ETM and ITM ! | ???
I still don't understand. What principle
are you rely on? |
|
|
2920
|
Wed May 12 10:33:32 2010 |
kiwamu | Update | Green Locking | Re: Reflection from ETM and ITM ! | The procedure you wrote down as a standard
is right. I explain reasons why
we didn't do such way. |
|
|
2919
|
Wed May 12 09:16:29 2010 |
steve | Update | Green Locking | Reflection from ETM and ITM ! |
Now I know why Rana was wearing
his bright green pants yesterday. It is nice |
|
|
2918
|
Wed May 12 03:56:54 2010 |
Koji | Update | IOO | Faraday aligned | Zach and Koji
The old small MMT was removed and
wrapped by Al foils. |
|
|
2917
|
Wed May 12 03:52:54 2010 |
Koji | Update | Green Locking | Reflection from ETM and ITM ! | I could not understand this operation.
Can you explain this a bit more?
It sounds different from the standard |
|
|
2916
|
Wed May 12 03:42:38 2010 |
Koji | Update | Green Locking | Green Laser Beam Profile | Strange.
I thought the new result became twice of
the first result. i.e. w0=32um or so. |
|
|
2915
|
Wed May 12 02:35:13 2010 |
Koji, Rana, Kiwamu | Update | Green Locking | Reflection from ETM and ITM ! | We succeeded in getting
the reflected green beam from both ITMY and |
|
|
2914
|
Wed May 12 02:21:56 2010 |
rana | HowTo | Electronics | Marconi phase noise measurement setup | Finally got the 3-cornered-hat measurement
of the IFRs done. The result is attached.
|
|
|
2913
|
Tue May 11 18:58:49 2010 |
rana | HowTo | Electronics | Marconi phase noise measurement setup | Just a little while ago, at 2330 UTC on
5/11, I swapped the phase noise setup to
use another Marconi - this time its the 3rd |
|
|
2912
|
Tue May 11 17:02:43 2010 |
Kevin | Update | Green Locking | Green Laser Beam Profile |
|
|
|
2911
|
Tue May 11 16:38:16 2010 |
josephb,rana,rolf | Update | CDS | CDS questions and thoughts | 1) What is c1asc doing? What is ascaux
used for? What are the cables labeled
"C1:ASC_QPD" in the 1X2 rack really |
|
|
2910
|
Tue May 11 14:39:17 2010 |
Aidan | Update | Green Locking | Green Laser Beam Profile |
Here's a photo of the set-up
used. The beam profile is measured relative |
|
|
2909
|
Mon May 10 22:25:03 2010 |
Koji | Update | Green Locking | Green Laser Beam Profile | Hey, what a quick work!
But,
wait... |
|
|
2908
|
Mon May 10 20:33:29 2010 |
Koji | Summary | CDS | Finished | This IPC stuff looks really a nice improvement
of CDS.
Please just maintain the wiki updated |
|
|
2907
|
Mon May 10 20:03:22 2010 |
Kevin | Update | Green Locking | Green Laser Beam Profile | Kiwamu and Kevin measured the beam profile
of the green laser by the south arm ETM.
The following measurements were made |
|
|
2906
|
Mon May 10 19:29:33 2010 |
Alberto | HowTo | Electronics | New Focus 1811 PD calibrated against New Focus 1611 PD | I measured the output impedance of the
New Focus 1611 PD (the 1GHz one) and it is
50 Ohm for both the DC and the AC output. |
|
|
2905
|
Mon May 10 19:09:45 2010 |
rana | Update | Electronics | Unexpected oscilaltionin the POY11 PD |
|
|
|
2904
|
Mon May 10 18:56:53 2010 |
rana | Update | Electronics | Unexpected oscilaltionin the POY11 PD | Where did you get the 55nH based notch
from? I don't remember anything like that
from the other LSC PD schematics. This is |
|
|
2903
|
Mon May 10 17:47:16 2010 |
josephb | Summary | CDS | Finished | So I finished writing a script which takes
an .ipc file (the one which defines channel
names and numbers for use with the RCG code |
|