| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16270
|
Thu Aug 5 14:59:31 2021 |
Anchal | Update | General | Added temperature sensors at Yend and Vertex too | I've added the other two temperature
sensor modules on Y end (on 1Y4, IP: 192.168.113.241)
and in the vertex on (1X2, IP: 192.168.113.242). |
|
|
16269
|
Wed Aug 4 18:19:26 2021 |
paco | Update | General | Added infrasensing temperature unit to martian network | [ian, anchal, paco]
We hooked up the infrasensing unit
to power and changed its default IP address |
|
|
16268
|
Tue Aug 3 20:20:08 2021 |
Anchal | Update | Optical Levers | Recentered ETMX, ITMX and ETMY oplevs at good state | Late elog. Original time 08/02/2021 21:00.
I locked both arms and ran ASS
to reach to optimum alignment. ETMY PIT > |
|
|
16267
|
Mon Aug 2 16:18:23 2021 |
Paco | Update | ASC | AS WFS MICH commissioning | [anchal, paco]
We picked up AS WFS comissioning
for daytime work as suggested by gautam. |
|
|
16266
|
Thu Jul 29 14:51:39 2021 |
Paco | Update | Optical Levers | Recenter OpLevs | [yehonathan, anchal, paco]
Yesterday around 9:30 pm, we centered
the BS, ITMY, ETMY, ITMX and ETMX oplevs |
|
|
16265
|
Wed Jul 28 20:20:09 2021 |
Yehonathan | Update | General | The temperature sensors and function generator have arrived in the lab | I put the temperature sensors box on Anchal's
table (attachment 1) and the function generator
on the table in front of the c1auxey Acromag |
|
|
16264
|
Wed Jul 28 17:10:24 2021 |
Anchal | Update | LSC | Schnupp asymmetry | [Anchal, Paco]
I redid the measurement of Schnupp
asymmetry today and found it to be 3.8 cm |
|
|
16263
|
Wed Jul 28 12:47:52 2021 |
Yehonathan | Update | CDS | Opto-isolator for c1auxey | To simulate a differential output I used
two power supplies connected in series. The
outer connectors were used as the outputs |
|
|
16262
|
Wed Jul 28 12:00:35 2021 |
Yehonathan | Update | BHD | SOS assembly | After receiving two new tubes of EP-30
I resumed the gluing activities. I made a
spreadsheet |
|
|
16261
|
Tue Jul 27 23:04:37 2021 |
Anchal | Update | LSC | 40 meter party | [ian, anchal, paco]
After our second attempt of locking
PRFPMI tonight, we tried to resotre XARM |
|
|
16260
|
Tue Jul 27 20:12:53 2021 |
Koji | Update | BHD | SOS assembly | 1 or 2. The stained ones are just fine.
If you find the vented 1/4-20 screws in the
clean room, you can use them. |
|
|
16259
|
Tue Jul 27 17:14:18 2021 |
Yehonathan | Update | BHD | SOS assembly | Jordan has made 1/4" tap holes in
the lower EQ stop holders (attachment). The
1/4" stops (schematics) |
|
|
16257
|
Mon Jul 26 17:34:23 2021 |
Paco | Update | Loss Measurement | Loss measurement | [gautam, yehonathan, paco]
We went back to the loss data from
last week and more carefully estimated the |
|
|
16256
|
Sun Jul 25 20:41:47 2021 |
rana | Update | Loss Measurement | Loss measurement | What are the quantitative root causes for
why the statistical uncertainty is so large?
Its larger than 1/sqrt(N) |
|
|
16255
|
Sun Jul 25 18:21:10 2021 |
Koji | Update | General | Canon camera / small silver tripod / macro zoom lens / LED ring light returned / Electronics borrowed | Camera and accesories returned
One HAM-A coildriver and one sat
amp borrowed -> QIL |
|
|
16254
|
Thu Jul 22 16:06:10 2021 |
Paco | Update | Loss Measurement | Loss measurement | [yehonathan, anchal, paco, gautam]
We concluded estimating the XARM
and YARM losses. The hardware configuration |
|
|
16253
|
Wed Jul 21 18:08:35 2021 |
yehonathan | Update | Loss Measurement | Loss measurement | {Gautam, Yehonathan, Anchal, Paco}
We prepared for the loss measurement
using DC reflection method. We did the following |
|
|
16252
|
Wed Jul 21 14:50:23 2021 |
Koji | Update | SUS | New electronics | Received:
Jun 29, 2021 BIO I/F 6 units
Jul 19, 2021 PZT Drivers x2 / QPD |
|
|
16251
|
Mon Jul 19 22:16:08 2021 |
paco | Update | LSC | PRFPMI locking | [gautam, paco]
Gautam managed to lock PRFPMI a
little before ~ 22:00 local time. The ALS |
|
|
16250
|
Sat Jul 17 00:52:33 2021 |
Koji | Update | General | Canon camera / small silver tripod / macro zoom lens / LED ring light borrowed -> QIL | Canon camera / small silver tripod / macro
zoom lens / LED ring light borrowed ->
QIL |
|
|
16249
|
Fri Jul 16 16:26:50 2021 |
gautam | Update | Computers | Docker installed on nodus | I wanted to try hosting some docker images
on a "private" server, so I installed
Docker on nodus following the instructions |
|
|
16248
|
Thu Jul 15 14:25:48 2021 |
Paco | Update | LSC | CM board | [gautam, paco]
We tested the CM board by implementing
the high bandwidth IR lock (single arm). |
|
|
16247
|
Wed Jul 14 20:42:04 2021 |
gautam | Update | LSC | Locking | [paco, gautam]
we decided to give the PRFPMI lock
a go early-ish. Summary of findings today |
|
|
16246
|
Wed Jul 14 19:21:44 2021 |
Koji | Update | General | Brrr | Jordan reported on Jun 18, 2021:
"HVAC tech came today, and replaced |
|
|
16245
|
Wed Jul 14 16:19:44 2021 |
gautam | Update | General | Brrr | Since the repair work, the temperature
is significantly cooler. Surprisingly, even
at the vertex (to be more specific, inside |
|
|
16244
|
Mon Jul 12 18:06:25 2021 |
Yehonathan | Update | CDS | Opto-isolator for c1auxey | I edited /cvs/cds/caltech/target/c1auxey1/ETMYaux.db
(after creating a backup) and added the spare
coil driver channels. |
|
|
16243
|
Fri Jul 9 18:35:32 2021 |
Yehonathan | Update | CDS | Opto-isolator for c1auxey | Following Koji's channel list review,
we made changes to the
wiring spreadsheet. |
|
|
16242
|
Fri Jul 9 15:39:08 2021 |
Anchal | Summary | ALS | Single Arm Actuation Calibration with IR ALS Beat [Correction] | I did this analysis again by just doing
demodulation go 5s time segments of the 60s
excitation signal. The major difference is |
|
|
16241
|
Thu Jul 8 11:20:38 2021 |
Anchal, Paco, Gautam | Summary | LSC | PRFPMI locking attempts | Last night Gautam walked us through the
algorithm used to lock PRFPMI. We tried it
several times with the PSL HEPA filter off |
|
|
16240
|
Tue Jul 6 17:40:32 2021 |
Koji | Summary | General | Lab cleaning | We held the lab cleaning for the
first time since the campus reopening (Attachment
1). |
7x |
|
16239
|
Tue Jul 6 16:35:04 2021 |
Anchal, Paco, Gautam | Update | IOO | Restored MC | We found that megatron is unable to properly
run scripts/MC/WFS/mcwfsoff and scripts/MC/WFS/mcwfson
scripts. It fails cdsutils commands due to |
|
|
16238
|
Tue Jul 6 10:47:07 2021 |
Paco, Anchal | Update | IOO | Restored MC | MC was unlocked and struggling to recover
this morning due to misguided WFS offsets.
In order to recover from this kind of issue, |
|
|
16237
|
Fri Jul 2 12:42:56 2021 |
Anchal, Paco, Gautam | Summary | LSC | snap file changed for MICH | We corrected the MICH locking snap file
C1configure_MI.req and saved an updated C1configure_MI.snap.
Now the 'Restore MICH' script in |
|
|
16236
|
Thu Jul 1 16:55:21 2021 |
Anchal | Summary | Optical Levers | Fixed Centeringoptical levers PRM | This was a mistake. When arms are locked,
PRM is misaligned by setting -800 offset
in PIT dof of PRM. The oplev is set to function |
|
|
16235
|
Thu Jul 1 16:45:25 2021 |
Yehonathan | Update | BHD | SOS assembly | The bonding test passed - the weight still
hangs from the dumbell. Unfortunately, I
broke the bond trying to release the assembly |
|
|
16234
|
Thu Jul 1 11:37:50 2021 |
Paco | Update | General | restarted c0rga | Physically rebooted c0rga workstation after
failing to ssh into it (even as it was able
to ping into it...) the RGA seems to be off |
|
|
16233
|
Thu Jul 1 10:34:51 2021 |
Paco, Anchal | Summary | LSC | ETMY QPD fixed | Paco worked on alignign the beam splitter
to get light on the ETMY QPD and was successful
in centering it without any other changes |
|
|
16232
|
Wed Jun 30 18:44:11 2021 |
Anchal | Summary | LSC | Tried fixing ETMY QPD | I worked in Yend station, trying to get
the ETMY QPD to work properly. When I started,
only one (quadrant #3) of the 4 quadrants |
|
|
16231
|
Wed Jun 30 15:31:35 2021 |
Anchal | Summary | Optical Levers | Centered optical levers on ITMY, BS, PRM and ETMY | When both arms were locked, we found that
ITMY optical lever was very off-center. This
seems to have happened after the c1susaux |
|
|
16230
|
Wed Jun 30 14:09:26 2021 |
Ian MacMillan | Update | CDS | SUS simPlant model | I have looked at my code from the previous
plot of the transfer function and realized
that there is a slight error that must be |
|
|
16229
|
Tue Jun 29 20:45:52 2021 |
Yehonathan | Update | BHD | SOS assembly | I glued another batch of 6 magnet+dumbell
assemblies. I will take a look at them under
the microscope once they are cured. |
|
|
16228
|
Tue Jun 29 17:42:06 2021 |
Anchal, Paco, Gautam | Summary | LSC | MICH locking tutorial with Gautam | Today we went through LSC locking mechanics
with Gautam and as a "Hello World"
example, worked on locking michelson cavity. |
|
|
16227
|
Mon Jun 28 12:35:19 2021 |
Yehonathan | Update | BHD | SOS assembly | On Thursday, I glued another set of 6 dumbells+magnets
using the same method as before. I made sure
that dumbells are pressed onto the magnets. |
|
|
16226
|
Fri Jun 25 19:14:45 2021 |
Jon | Update | Equipment loan | Zurich Instruments analyzer | I returned the Zurich Instruments analyzer
I borrowed some time ago to test out at home.
It is sitting on first table across from |
|
|
16225
|
Fri Jun 25 14:06:10 2021 |
Jon | Update | CDS | Front-End Assembly and Testing | Summary
Here is the final
summary (from me) of where things stand with
the new front-end systems. With Anchal and |
|
|
16224
|
Thu Jun 24 17:32:52 2021 |
Ian MacMillan | Update | CDS | Front-End Assembly and Testing | Anchal and I ran tests on the two systems
(C1-SUS2 and C1-BHD). Attached are the results
and the code and data to recreate them. |
|
|
16223
|
Thu Jun 24 16:40:37 2021 |
Koji | Update | SUS | MC lock acquired back again | [Koji, Anchal]
The issue
of the PD output was that the PD whitened |
|
|
16222
|
Wed Jun 23 09:05:02 2021 |
Anchal | Update | SUS | MC lock acquired back again | MC was unable to acquire lock because the
WFS offsets were cleared to zero at some
point and because of that MC was very misaligned |
|
|
16221
|
Tue Jun 22 17:05:26 2021 |
Yehonathan | Update | BHD | SOS assembly | According to the schematics,
the distance between the original EQ tap
holes is 0.5". Given that the original |
|
|
16220
|
Tue Jun 22 16:53:01 2021 |
Ian MacMillan | Update | CDS | Front-End Assembly and Testing | The channels on both the C1BHD and C1SUS2
seem to be frozen: they arent updating and
are holding one value. To fix this Anchal |
|