| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
3223
|
Wed Jul 14 19:15:26 2010 |
Gopal | Summary | Optic Stacks | REVISION: Eigenfrequency Analysis of Single Stack Complete | My previous eigenfrequency analysis
was incorrect by two orders of magnitude
due to the misuse of Young's Modulus information |
|
|
3222
|
Wed Jul 14 19:00:56 2010 |
Gopal | Configuration | Optic Stacks | Vitol Material Properties, REVISED |
|
|
|
3221
|
Wed Jul 14 18:09:50 2010 |
josephb, razib | Update | Phase Camera | Some cleanup behind 1Y2 rack of phasecamera electronics | We made an attempt at cleaning up the phase
camera setup electronics.
We have moved a portion of the electronics |
|
|
3220
|
Wed Jul 14 16:39:06 2010 |
Jenne | Update | DAQ | Debugging Guralp and reboots | [Joe, Jenne]
Joe got on the phone with Alex, and
Alex's magic Alex intuition told him to ask |
|
|
3219
|
Wed Jul 14 13:03:04 2010 |
Gopal | Update | WIKI-40M Update | 7.8.10 - 7.14.10 Weekly Update | Summary of this Week's Activities:
Wed. 7/7: COMSOL Busbar tutorials;
began stack design; began base; Viton rubber |
|
|
3218
|
Wed Jul 14 12:31:11 2010 |
nancy | Update | General | Weekly Update | Summary of this week's work
Wednesday
- Aligned the mode cleaner with Koji, and
then measured the beam characteristics at |
|
|
3217
|
Wed Jul 14 12:12:03 2010 |
Razib | Summary | Phase Camera | Weekly update | This week I was mainly interested in investigating
the noise source at the phase camera. So
having this issue in mind, my activities |
|
|
3216
|
Wed Jul 14 11:54:33 2010 |
josephb | Update | DAQ | Debugging Guralp and reboots | This is regards to zero signal being reported
by the channels C1:PEM-SEIS_GUR1_X, C1:PEM-SEIS_GUR1_Y,
and C1:PEM-SEIS_GUR1_Z. |
|
|
3215
|
Wed Jul 14 11:51:48 2010 |
Razib | Update | Phase Camera | Work near 1Y2 yesterday |
|
|
|
3214
|
Wed Jul 14 11:32:36 2010 |
Sharmila, Katharine | Update | WIKI-40M Update | | Weekly update:
We correctly connected our circuit |
|
|
3213
|
Wed Jul 14 10:00:14 2010 |
josephb | Update | Phase Camera | Work near 1Y2 yesterday | Razib and I were attempting to get the
output of a photodiode (PD55A in this case)
recorded, so that we could independently |
|
|
3212
|
Wed Jul 14 01:05:27 2010 |
Sharmila,Katharine | Summary | elog | Maglev | Yesterday we hooked up the Quadrant Maglev
control to the power supply to test the components
in the Input/Output part of the circuit. |
|
|
3211
|
Tue Jul 13 23:20:37 2010 |
Jenne | Update | PEM | Gur1 has no signal?!?!?!?! |
|
|
|
3210
|
Tue Jul 13 21:04:49 2010 |
tara,rana | Summary | PSL | Transfer function of FSS servo | I
measured FSS's open loop transfer function.
|
|
|
3209
|
Tue Jul 13 19:26:47 2010 |
rana | Update | IOO | MC still broken | After whatever Joe/Alberto did this afternoon,
the MC was not locking. Koji and I removed
several of the cables in the side of the |
|
|
3208
|
Tue Jul 13 17:36:42 2010 |
nancy | Update | IOO | Wavefront Sensing Matrix Control | For yesterday - July 12th.
Yesterday, I tried understanding
the MEDM and the Dataviewer screens for the |
|
|
3207
|
Tue Jul 13 14:59:04 2010 |
Gopal | Update | Optic Stacks | Eigenfrequency Analysis of Single Stack Complete | Via reconfiguration of Viton parameters
(previously posted), I managed to debug the
COMSOL run time errors and null pointer exceptions. |
|
|
3206
|
Tue Jul 13 13:56:29 2010 |
Gopal | Configuration | Optic Stacks | Vitol Material Properties | Viton flouroelastomers have somewhat variable
material properties. The following parameters
are being used for eigenfrequency analysis. |
|
|
3205
|
Tue Jul 13 11:51:19 2010 |
Jenne | Update | PEM | Gur1 has no signal?!?!?!?! | [Sanjit, Jenne]
Sanjit discovered that the Gur1 channels
are all digital 0. We determined that |
|
|
3204
|
Tue Jul 13 11:20:07 2010 |
Dmass | Update | Green Locking | SHG on PSL table : optimum temeprature |
It seems like you might inherit
an offset by using step (3) b/c of the temperature |
|
|
3203
|
Tue Jul 13 11:00:29 2010 |
kiwamu | Update | Green Locking | SHG on PSL table : optimum temeprature | The optimum
temperature for the doubling crystal on the |
|
|
3202
|
Tue Jul 13 10:02:30 2010 |
steve | Update | MOPA | laser power is dropping slowly | I have just removed an other 400 cc of
water from the chiller. I have been
doing this since the HTEMP started fluctuating. |
|
|
3201
|
Mon Jul 12 22:01:13 2010 |
Koji | Update | SUS | One TT suspended. Still need fine alignment | Jenne and Koji
We tweaked the alignment of the TT
mirror. |
|
|
3200
|
Mon Jul 12 21:26:02 2010 |
Katharine, Sharmila | Update | elog | maglev coils | The connection between our coil wires and
BNC terminals was pretty awful (soldered
wires broke off |
|
|
3199
|
Mon Jul 12 18:37:10 2010 |
Gopal | Update | Optic Stacks | Eigenfrequency Analysis of Simple Objects | Eigenfrequency analysis has been successfully
completed in COMSOL on both a tutorial camshaft,
as well as a homemade metal bar. |
|
|
3198
|
Mon Jul 12 17:05:30 2010 |
nancy | Update | SUS | Characterisation of the QPD |
|
|
|
3197
|
Mon Jul 12 15:49:56 2010 |
nancy | Update | SUS | Characterisation of the QPD | I and koji setup the measurement of the
QPD response to the pitch and yaw displacements
of the beam spot. |
|
|
3196
|
Mon Jul 12 14:22:36 2010 |
Jenne | Summary | PSL | Things I did to the PSL today: Refcav, PMC, cameras, etc. |
|
|
|
3195
|
Mon Jul 12 13:16:53 2010 |
kiwamu | Update | Green Locking | PZT feedback at X end | The
feedback signal going to the laser PZT at
the X end station was measured in |
|
|
3194
|
Mon Jul 12 12:16:50 2010 |
Dmass | HowTo | COMSOL Tips | Intrusions (Negative Extrusions) | An entry on the 40m wiki page might
serve you better, and be easier to sift
through once all is said and done |
|
|
3193
|
Mon Jul 12 11:20:56 2010 |
Gopal | HowTo | COMSOL Tips | Intrusions (Negative Extrusions) | For the sake of future users, I have decided
to periodically add tips and tricks in using
COMSOL that I have figured out, most probably |
6x |
|
3192
|
Mon Jul 12 10:23:51 2010 |
steve | Update | PEM | air condition maintenance is today | The AC filters will be checked and/or replaced
today. This means the AC will be off for
sort periods of time. Temperature and particle |
|
|
3191
|
Mon Jul 12 02:21:01 2010 |
Koji | Configuration | ASC | Resurrection of MC WFS | I have resurrected the MC WFS on Friday
night.
I have uncommented the WFS part of |
|
|
3190
|
Sun Jul 11 20:11:48 2010 |
rana | Summary | PSL | RC trend after the insulation removal | |
|
|
3189
|
Fri Jul 9 20:16:19 2010 |
rana | Summary | PSL | Things I did to the PSL today: Refcav, PMC, cameras, etc. | I re-aligned the beam into the PMC. I got
basically no improvement. So I instead changed
the .LOW setting so that PMCTRANS would no |
|
|
3188
|
Fri Jul 9 12:25:25 2010 |
kiwamu | Update | Green Locking | SHG on PSL table | In order
to increase the green power on the PSL table, |
|
|
3187
|
Fri Jul 9 12:07:26 2010 |
Razib | Update | Phase Camera | Weekly update | Here are some more details about the current
phasecam setup. We are using a He-Ne laser
setup |
|
|
3186
|
Fri Jul 9 11:41:58 2010 |
Gopal | Summary | Optic Stacks | Top Optic Layer Complete; Mechanical Tests Giving Problems |
|
7x |
|
3185
|
Fri Jul 9 11:09:14 2010 |
josephb | Update | Computers | Fb40m and a few other machines turned off briefly just before 11am | I turned off fb40m2 and fb40m temporarily
while we added an extra power strip
to the (new) 1X6 rack at the bottom in the |
|
|
3184
|
Thu Jul 8 21:44:43 2010 |
nancy | Update | IOO | WFS calculations |
I just found the singular values
and the condition number of the 4*4 matrix |
|
|
3183
|
Thu Jul 8 20:32:22 2010 |
nancy | Update | IOO | MC alignment values. | I and Koji were trying to lock the mode
cleaner for measuring the beam power at
MC2 end. That is when we obtained the trans |
|
|
3182
|
Thu Jul 8 19:43:16 2010 |
nancy | Update | IOO | WFS calculations | The WFS error signals were recorded in
the order
WFS1_PIT |
|
|
3181
|
Thu Jul 8 17:29:20 2010 |
Katharine, Sharmila | Update | elog | |
|
6x |
|
3180
|
Thu Jul 8 16:24:30 2010 |
Gopal | Update | Optic Stacks | Completion of single stack layer | Single layer of stack successfully modeled
in COMSOL. I'm working on trying to add Viton
springs now and extend it to a full stack. |
|
|
3179
|
Thu Jul 8 15:43:58 2010 |
rana | Update | Computers | Some channels not being recorded!!! |
|
|
|
3178
|
Thu Jul 8 15:19:27 2010 |
josephb, koji | Configuration | Computers | Added Zonet camera to IP table on linux1 | We gave the Zonet camera the IP 192.168.113.26
and the name Zonet1.
We did this by modifying the /var/named/chroot/var/named/113.168.192.in-addr.arpa.zone |
|
|
3177
|
Thu Jul 8 14:32:42 2010 |
josephb | Update | CDS | Daily Downs Update | After talking with Rolf, and clarifying
exactly which machine I wanted, he gave me
an 4600 Sun machine (similar to our current |
|
|
3176
|
Thu Jul 8 14:11:16 2010 |
josephb | Update | Computers | Some channels not being recorded!!! | This has been fixed,
thanks to some help from Alex. It doesn't |
|
|
3175
|
Wed Jul 7 23:11:08 2010 |
Koji | Update | IOO | MC alignment values. | Hmm. I expect that you will put more details
of the work tomorrow.
i.e. motivation, method, result (the |
|
|
3174
|
Wed Jul 7 22:58:08 2010 |
nancy | Update | IOO | MC alignment values. | Nancy and Koji:
This is what I and Koji measured
after aligning the MC in the afternoon. |
|