| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17413
|
Mon Jan 23 22:51:17 2023 |
yuta | Summary | BHD | 60 Hz harmonics side lobe investigations | [Paco, Yehonathan, Yuta]
Since we have installed BH44, we
are seeing side lobes of 60 Hz + harmonics |
|
|
17417
|
Tue Jan 24 21:29:31 2023 |
yuta | Summary | BHD | Electronics diagram around BH44 and BH55 | 1) Turning the whitening filter before
the ADC on/off didn't changed the relative
height of 60 Hz peak compared with the |
|
|
17419
|
Wed Jan 25 11:35:20 2023 |
yuta | Summary | BHD | REFL55 visually inspected, BH44 Kapton taped | Following was done to investigate 60 Hz
noise issue, but no significant change in
the FPMI noise observed. |
|
|
17423
|
Wed Jan 25 18:01:21 2023 |
yuta | Summary | BHD | BH44 setup isolated, but 60 Hz noise stays the same | [Paco, Anchal, Yuta]
Isolating
BH44 setup from the rest didn't help |
|
|
17426
|
Thu Jan 26 16:07:05 2023 |
yuta | Summary | PSL | PMC aligned, now PMC transmission is 0.7 | PMC aligned (Attachment #1).
Over the past month, PMC transmission
is actually slowly growing from 0.68 to 0.70 |
|
|
17431
|
Fri Jan 27 19:35:31 2023 |
yuta | Summary | BHD | 60 Hz noise investigations around IMC | So far different measurements are consistent
with the hypothesis that the 60 Hz noise
is from PSL frequency noise (40m/17423). |
6x |
|
17432
|
Fri Jan 27 21:22:57 2023 |
yuta | Summary | BHD | V beam dump installed for BH44 RF PD | One of these V beam dumps was installed
for BH44 RF PD.
The rest is now stored in the box |
|
|
17446
|
Fri Feb 3 17:39:38 2023 |
yuta | Summary | BHD | 60 Hz noise investigations around IMC, part 2 | [Paco, Yuta]
We estimated the frequency noise of |
|
|
17455
|
Tue Feb 7 20:10:05 2023 |
yuta | Summary | BHD | 60 Hz noise investigations around IMC, part 3 | [Anchal, Yuta]
We have measured OLTF of IMC loop, |
|
|
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 |
|
|
14251
|
Sat Oct 13 20:11:10 2018 |
yuki | Update | Computer Scripts / Programs | loss measurements |
Quote:
|
|
|
14254
|
Mon Oct 15 10:32:13 2018 |
yuki | Update | Computer Scripts / Programs | loss measurements | I used these values for measuring armloss:
Transmissivitity of ITM
= 1.384e-2 * (1 +/- 1e-2)
Transmissivitity |
|
|
14255
|
Mon Oct 15 12:52:54 2018 |
yuki | Update | Computer Scripts / Programs | additional comments |
Quote:
|
|
|
14257
|
Mon Oct 15 20:11:56 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | Final Procedure Report for Green Locking
in YARM:
Purpose |
|
|
14258
|
Tue Oct 16 00:44:29 2018 |
yuki | Update | Computer Scripts / Programs | loss measurements | The scripts for measuring armloss are in
the directory "/opt/rtcds/caltech/c1/scripts/lossmap_scripts/armloss_scope".
armloss_derefl_asdcpd_scope.py: |
|
|
14260
|
Wed Oct 17 20:46:24 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | To do for Green Locking in YARM:
The auto-alignment servo should
be completed. This servo requires many parameters |
|
|
14280
|
Wed Nov 7 05:16:16 2018 |
yuki | Update | Computer Scripts / Programs | arm loss measuremenents | Please check your data file and compare
with those Johannes made last year.
I think the power in your data file may have |
|
|
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. |
|
|
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. |
|
|
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. |
|