| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
79
|
Wed Nov 7 14:01:31 2007 |
waldman | Omnistructure | OMC | Frequency and Intensity noise | One of the biggest problems I had using the
PZT to lock was excessive noise. I did a
little noise hunting and found that the problem |
|
|
86
|
Fri Nov 9 00:01:24 2007 |
waldman | Omnistructure | OMC | OMC mechanical resonances (Tap tap tappy tap) | [Pinkesh, Aidan, Sam]
We did a tap-tap-tappy-tap test of the OMC |
7x |
|
179
|
Fri Dec 7 11:33:24 2007 |
waldman | Omnistructure | OMC | PZT wiring | The 2 pin LEMO connector has got an unmarked
pin and a pin marked by a white half-circle.
The unmarked pin is connected to the side |
|
|
206
|
Thu Dec 20 19:05:34 2007 |
waldman | HowTo | OMC | HOWTO build front ends | For instance, to build the TPT front end
code.
|
|
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207
|
Thu Dec 20 19:10:03 2007 |
waldman | Update | OMC | Stressful reattachment of heater | Photos may follow eventually, but for now
here's the rundown. I scraped the heater
clean of the thermal epoxy using a clean |
|
|
14193
|
Wed Sep 5 10:59:23 2018 |
wgautam | Update | CDS | CDS status update | Rolf came by today morning. For now, we've
restarted the FE machine and the expansion
chassis (note that the correct order in which |
|
|
14816
|
Mon Jul 29 19:08:55 2019 |
yehonathan | Update | Loss Measurement | Reviving loss measurement by reflection | 1. X arm is totally misaligned in order
to measure the Y arm loss using the reflection
method. Each measurement round consists of |
|
|
14827
|
Mon Aug 5 14:47:36 2019 |
yehonathan | Update | Loss Measurement | | Summary:
I analyze the 100 reps loss measurement
of the Y arm using the AnalyzeLossData.ipynb |
|
|
Draft
|
Mon Aug 5 16:28:41 2019 |
yehonathan | Update | Loss Measurement | what is going on with the loss measurements ? | We hypothesize that the systematic error
in the loss measurement can come from the
fact that the requirement on the alignment |
|
|
14830
|
Mon Aug 5 17:36:04 2019 |
yehonathan | Update | Loss Measurement | | We check for unexpected drifts in the PD
reading (clipping and such). We put a pickoff
mirror where the PD used to be and place |
|
|
14831
|
Tue Aug 6 14:12:02 2019 |
yehonathan | Update | Computers | making rossa great again | cdsutils is not working on rossa.
Import cdsutils produces this error:
In [2]: import cdsutils |
|
|
14834
|
Tue Aug 6 16:44:50 2019 |
yehonathan | Update | Loss Measurement | | I grab 2 hours of the PD measurements using
dlData_simple.ipynb in the misaligned state.
I get pretty much a normally distributed |
|
|
15116
|
Fri Jan 10 19:48:46 2020 |
yehonathan | Update | PSL | Assembly underway for c1psl upgrade | {Yehonathan, Jon}
I finished pre-wiring the PSL chassis.
I mounted the Acromags on the DIN rails and |
|
|
15118
|
Mon Jan 13 16:05:18 2020 |
yehonathan | Update | PSL | Assembly underway for c1psl upgrade | {Yehonathan, Jon}
I configured the Acromag channels
according to the Slow |
|
|
15120
|
Tue Jan 14 17:16:43 2020 |
yehonathan | Update | PSL | Assembly underway for c1psl upgrade | {Yehonathan, Jon}
I isolated a BIO Acromag completely
from the chassis and powered it up. The inverted |
|
|
15262
|
Tue Mar 10 14:30:16 2020 |
yehonathan | Update | SUS | | ETMX was grossly misaligned.
I re-aligned it and the X arm now
locks. |
|
|
15263
|
Tue Mar 10 19:58:16 2020 |
yehonathan | Update | SUS | | I returned the triggering threshold to
normal values (5/3).
|
|
|
15614
|
Tue Oct 6 07:37:20 2020 |
yehonathan | Update | Wiki | New TIS measurements of 40m Optics | LiYuan has kindly done some Total Integrating
Sphere (TIS) measurements on ITMU01 and ITMU02.
A summary of the measurement is attached. |
|
|
15788
|
Tue Feb 2 17:09:17 2021 |
yehonathan | Update | BHD | SOS assembly | I set up a working area on the table next
to the south flow bench (see attachment).
I also brought in a rolling table for some |
|
|
15816
|
Thu Feb 18 15:15:12 2021 |
yehonathan | Update | SUS | OSEM testing for SOSs | I am setting up a testing rig for the OSEMs
we recently obtained. I found the schematic
for the OSEM assembly from which the pin |
|
|
15837
|
Wed Feb 24 10:09:16 2021 |
yehonathan | Update | SUS | OSEM testing for SOSs | Yes, my phone camera mirrored the image.
Sorry for the confusion.
I see you already uploaded the |
|
|
16062
|
Wed Apr 21 11:09:57 2021 |
yehonathan | Update | PSL | Laser amplifier | I went to the TCS lab to take a look at
the chillers lying around. I spotted two
chillers: |
|
|
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 |
|
|
16371
|
Fri Oct 1 14:25:27 2021 |
yehonathan | Summary | SUS | PRM and BS Angular Actuation transfer function magnitude measurements | {Paco, Yehonathan, Hang}
We measured the sensing PRMI sensing
matrix. Attachment 1 shows the results, the |
|
|
16779
|
Thu Apr 14 11:52:57 2022 |
yehonathan | Summary | BHD | Part IIa of BHR upgrade - POY11 debugging | {JC, Paco, Yehonathan, Ian}
POY lens was moved to infront of
the POY steering mirror to make the POU beam |
|
|
16799
|
Thu Apr 21 18:18:42 2022 |
yehonathan | Update | BHD | POX Alignment | {Yehonathan, Paco}
BS, ITMX and ETMX were aligned
to get flashing in the X arm. |
|
|
14825
|
Fri Aug 2 17:07:33 2019 |
yehonathan, gautam | Update | Loss Measurement | | We run a loss measurement on the Y arm
with 50 repetitions. |
|
|
12825
|
Mon Feb 13 17:19:41 2017 |
yinzi | Configuration | | configuring ethernet for raspberry pi | Gautam and I were able to get the Raspberry
Pi up and running today, including being
able to ssh into it from the control room. |
|
|
14205
|
Fri Sep 21 09:59:09 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | [Yuki, Gautam]
Attachments #1 is the current setup
of AUX Y Green locking and it has |
|
|
14211
|
Sun Sep 23 17:38:48 2018 |
yuki | Update | ASC | Alignment of AUX Y end green beam was recovered | [ Yuki, Koji, Gautam ]
An alignment of AUX Y end green
beam was bad. With Koji and Gautam's |
|
|
14212
|
Sun Sep 23 19:32:23 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | [ Yuki, Gautam ]
The setup I designed before has
abrupt gouy phase shift between two steering |
|
|
14214
|
Mon Sep 24 11:09:05 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | [ Yuki, Steve ]
With Steve's help, we checked
a new lens can be set soon after dichroic |
|
|
14216
|
Tue Sep 25 18:08:50 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | [ Yuki, Gautam ]
We want to remotely control steeing
PZT mirrors so its driver is needed. |
|
|
14218
|
Thu Sep 27 14:02:55 2018 |
yuki | Configuration | ASC | PZT driver board verification | [ Yuki, Gautam ]
I fixed the input terminal that
had been off, and made sure PZT driver |
|
|
14219
|
Sun Sep 30 20:14:51 2018 |
yuki | Configuration | ASC | QPD calibration | [ Yuki, Gautam, Steve ]
Results:
I calibrated a QPD (D1600079, V1009) |
|
|
14221
|
Mon Oct 1 13:33:55 2018 |
yuki | Configuration | ASC | QPD calibration |
Quote:
|
|
|
14224
|
Tue Oct 2 18:50:53 2018 |
yuki | Configuration | ASC | PZT mirror calibration | [ Yuki, Gautam ]
I calibrated PZT mirrors. The ROUGH
result was attached. (Note that some errors and |
|
|
14226
|
Wed Oct 3 14:24:40 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | Interim Procedure Report:
Purpose
The current setup of AUX Y-arm |
|
|
14227
|
Wed Oct 3 18:15:34 2018 |
yuki | Configuration | ASC | AI board improvement | [ Yuki, Gautam ]
I improved Anti-Imaging board (D000186-Rev.D),
which will be put between DAC port and |
|
|
14228
|
Thu Oct 4 00:44:50 2018 |
yuki | Configuration | ASC | AI board improvement | [ Yuki, Gautam ]
I made a cable which connects DAC
port (40 pins) and AI board (25 pins). I |
|
|
14230
|
Thu Oct 4 22:15:30 2018 |
yuki | Configuration | ASC | Y-end table upgrade | Before changing setup at Y-end table, I
measured the status value of the former setup
as follows. These values will be compared |
|
|
14232
|
Fri Oct 5 17:32:38 2018 |
yuki | Configuration | ASC | Y-end table upgrade | I measured it with the wrong setting of
a powermeter. The correct ones are here:
beam power going into doubling |
|
|
14234
|
Fri Oct 5 22:49:22 2018 |
yuki | Configuration | ASC | Y-end table upgrade | I designed a new layout. It has good mode-matching
efficiency, reasonable sensitivity to component
positions, good Gouy phase separation. I'm |
|
|
14236
|
Sun Oct 7 22:30:42 2018 |
yuki | Configuration | LSC | Yarm Green locking was recovered | I finished installation of optics in the
Y-end and recovered green locking. Current
ALS-TRY_OUTPUT is about 0.25, which is lower |
|
|
14237
|
Mon Oct 8 00:46:35 2018 |
yuki | Configuration | ASC | Y-end table upgrade |
Quote:
|
|
|
14240
|
Tue Oct 9 23:03:43 2018 |
yuki | Configuration | LSC | Yarm Green locking was recovered | [ Yuki, Gautam, Steve ]
To align the green beam in Y-end
these hardware were installed: |
|
|
14241
|
Wed Oct 10 12:38:27 2018 |
yuki | Configuration | LSC | All hardware was installed | I connected DAC - AIboard - PZTdriver -
PZT mirrors and made sure the PZT mirrors
were moving when changing the signal |
|
|
14243
|
Thu Oct 11 13:40:51 2018 |
yuki | Update | Computer Scripts / Programs | loss measurements |
Quote:
|
|
|
14245
|
Fri Oct 12 12:29:34 2018 |
yuki | Update | Computer Scripts / Programs | loss measurements | With Gautam's help, Y-arm was locked.
Then I ran the script "armloss_dcrefl_asdcpd_scope.py"
which gets the signals from oscilloscope. |
|
|
14248
|
Fri Oct 12 20:20:29 2018 |
yuki | Update | Computer Scripts / Programs | loss measurements | I ran the script for measuring arm-loss
and calculated rough Y-arm round trip loss
temporally. The result was 89.6ppm. (The |
|