| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
15150
|
Thu Jan 23 23:07:04 2020 |
Jon | Configuration | PSL | c1psl breakout board wiring | To facilitate wiring the c1psl chassis
and scripting loopback tests, I've
compiled a distilled spreadsheet with the |
|
|
15149
|
Thu Jan 23 22:10:01 2020 |
gautam | Update | PSL | PMC servo pulled out | While I have the board out, I'll try
and do a thorough investigation of TFs and
noise of the various stages. |
|
|
15148
|
Thu Jan 23 20:08:49 2020 |
shruti | Update | General | PLL / PM measurement of Xend NPRO PZT | Setup Update:
-
No more SR 560, upgraded to LB1005
P-I controller. Because: |
|
|
15147
|
Thu Jan 23 18:52:31 2020 |
gautam | Update | PSL | PMC RFPD characterization | Summary:
The RF transimpedance of the PMC
PDH RFPD was measured, and found to be |
|
|
15146
|
Thu Jan 23 16:37:14 2020 |
rana | Update | PSL | PMC VGA chip damaged? | doesn't seem so anomolous to me; we're
getting ~25 dB of gain range and the ideal
range would be 40 dB. My guess is that even |
|
|
15145
|
Thu Jan 23 15:32:42 2020 |
gautam | Configuration | Computers | Megatron: starts up grade | The burt snapshotting is still not so reliable
- for whatever reason, the number of snapshot
files that actually get written looks random. |
|
|
15144
|
Thu Jan 23 14:37:05 2020 |
gautam | Update | PSL | PMC VGA chip damaged? | [jordan, gautam]
Summary: |
|
|
15143
|
Wed Jan 22 20:12:36 2020 |
gautam | Update | PSL | PMC demodulator electrical characterization | Summary:
The mixer
+ LPF |
|
|
15142
|
Wed Jan 22 19:17:20 2020 |
gautam | Configuration | Computers | Megatron: starts up grade | upgrade was done
cronjob testing wasn't one
by one 😢 |
|
|
15141
|
Wed Jan 22 16:38:01 2020 |
rana | Update | Computers | rossa revival | wiped and install Debian 10 on rossa today
still to be done: config it as
CDS workstation |
|
|
15140
|
Wed Jan 22 16:19:47 2020 |
Jon | Update | VAC | TP3 controller errors | Gautam and I debugged a communications
problem with TP3 that was causing its python
service to fail. We traced the problem back |
|
|
15139
|
Wed Jan 22 11:22:39 2020 |
gautam | Update | PSL | PMC modulation depth measurement | Summary:
I estimate the PMC servo modulation
depth to be approximately |
|
|
15138
|
Wed Jan 22 11:00:21 2020 |
gautam | Update | PSL | PMC REFL ghost beam | I looked into this a little more today.
The steering optic used
to route PMC REFL to the RFPD is in fact |
|
|
15135
|
Mon Jan 20 20:20:36 2020 |
gautam | Update | PSL | PMC servo checkout | Summary:
The PDH discriminant of the PMC
servo was measured to be ~ |
|
|
15134
|
Mon Jan 20 15:11:20 2020 |
gautam | Update | PSL | PMCT photodiode grounding issue | For a few days, I've noticed that the
PSL overview StripTool panel shows PMC transmission
and FSS RMTEMP channels with variation that |
|
|
15133
|
Mon Jan 20 12:16:50 2020 |
gautam | Update | PSL | PMC input reverted to AOM zeroth order beam | Summary:
The input beam to the PMC
cavity was changed back to the zeroth order |
|
|
15132
|
Fri Jan 17 22:11:19 2020 |
Yehonathan | Update | PSL | Ringdown measurements | I prepare for the ringdown measurement
of the PMC according to Gautam's previous
experiments. |
|
|
15131
|
Fri Jan 17 21:56:22 2020 |
Yehonathan | Update | PSL | AOM first order beam alignment | Today I noticed that the beam reflected
from the PMC into the RFPD has a ghost (attachment)
due to reflection from the back of the high |
|
|
15130
|
Fri Jan 17 18:02:21 2020 |
gautam | Update | ALS | Gain blocks packaged and characterized | Summary:
The ZHL-1010+
gain blocks acquired from MiniCircuits |
|
|
15129
|
Thu Jan 16 19:32:23 2020 |
shruti | Update | General | PLL / PM measurement of Xend NPRO PZT | With Gautam's help today the PLL managed
to be be locked for a few brief moments.
Turns out the signal power of the beat was |
|
|
15128
|
Wed Jan 15 16:54:51 2020 |
gautam | Update | General | PDA10CF removed from AS table | Per Yehonathan's request, I removed
one PDA10CF from a pickoff of REFL on the
AS table (it was being used for the mode |
|
|
15127
|
Wed Jan 15 16:08:40 2020 |
not gautam | Update | PSL | Assembly underway for c1psl upgrade | You're right. We had the right
idea before but we got confused about this
issue. I changed all the XT1121s to XT1111 |
|
|
15126
|
Wed Jan 15 15:04:31 2020 |
gautam | Update | PSL | PMC Linewidth measurement | For the ringdowns, I suggest you replicate
the setup
I had - infrastructurally, this was quite |
|
|
15125
|
Wed Jan 15 14:10:28 2020 |
Jon | Configuration | PSL | New EPICS database for C1PSL + C1IOO | Summary
I have completed the
new EPICS channel database for the c1psl
and c1ioo channels |
|
|
15124
|
Wed Jan 15 10:12:46 2020 |
gautam | Update | PSL | Assembly underway for c1psl upgrade | I don't think this is an accurate statement.
XT1111 modules have sinking digital
outputs, while XT1121 modules have sourcing digital |
|
|
15123
|
Wed Jan 15 10:04:19 2020 |
gautam | Summary | General | POX / POY locking restored | Single arm locking using POX and POY has
been restored. After running the dither alignment
servos, the TRX/TRY levels are ~0.7. This |
|
|
15122
|
Wed Jan 15 08:55:14 2020 |
gautam | Update | CDS | Yearly DAQD fix | Summary:
Every new year (on Dec 31 or Jan
1), all of the realtime models will report |
|
|
15121
|
Tue Jan 14 20:17:09 2020 |
gautam | Summary | General | IFO recovery | Summary:
There was no light entering the
IFO. I worked on a few things to bring the |
|
|
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 |
|
|
15119
|
Mon Jan 13 23:30:53 2020 |
Yehonathan | Summary | PSL | Changes made since Gautam left | As per Gautam's request, I list the
changes that were made since he left:
1. The AOM driver was connected |
|
|
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 |
|
|
15117
|
Mon Jan 13 15:47:37 2020 |
shruti | Configuration | Computer Scripts / Programs | c1psl burt restore | [Yehonathan, Jon, Shruti]
Since the PMC would not lock, we
initially burt-restored the c1psl machine |
|
|
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 |
|
|
15115
|
Fri Jan 10 14:21:19 2020 |
Yehonathan | Update | PSL | c1psl reboot | PSL controls on the sitemap went blank.
Rebooted c1psl. PSL screens seem normal again. |
|
|
15114
|
Tue Jan 7 18:51:51 2020 |
Jon | Update | PSL | New c1psl server assembled | I've assembled a new SuperMicro rackmount
machine to replace c1psl. It is currently
set up on the electronics bench. |
|
|
15113
|
Mon Jan 6 19:05:09 2020 |
not gautam | Update | PSL | Assembly underway for c1psl upgrade | I found them, thanks. After c1psl, there
are 4 2GB DIMM cards and 1 SSD left. I moved
them into the storage bins with all the other |
|
|
15112
|
Mon Jan 6 16:07:12 2020 |
gautam | Update | PSL | Assembly underway for c1psl upgrade | RTFE.
Where did the spares go?
|
|
|
15111
|
Mon Jan 6 15:36:55 2020 |
Jon | Update | PSL | Assembly underway for c1psl upgrade | [Jon, Yehonathan]
We've begun assembling the
new c1psl Acromag chassis based on Yehonathan's |
|
|
15110
|
Wed Jan 1 16:04:37 2020 |
Yehonathan | Update | PSL | Mapping the PSL electronics | Done.
|
|
|
15109
|
Wed Jan 1 14:14:00 2020 |
Yehonathan | Update | PSL | PMC Linewidth measurement | Turns out the 35MHz sidebands are way too
weak to resolve from the resonance when doing
a PZT scan. |
|
|
15108
|
Wed Jan 1 04:53:11 2020 |
gautam | Update | PSL | Mapping the PSL electronics | For the IMC servo board, it'd be easiest
to copy the wiring scheme for the BIO bits
as is configured for the CM board (i.e. copy |
|
|
15107
|
Tue Dec 31 03:03:02 2019 |
gautam | Update | PSL | PMC cavity ringdown measurement | When I was looking at this, the AOM shutdown
time was measured to be ~120 ns, and while
I wasn't able to do a ringdown measurement |
|
|
15106
|
Fri Dec 27 16:26:11 2019 |
Yehonathan | Update | PSL | PMC Linewidth measurement | I try to measure the linewidth of the PMC
by ramping the PMC PZT.
I do it by connecting a triangular |
|
|
15105
|
Fri Dec 27 15:01:02 2019 |
Yehonathan | Update | PSL | PMC cavity ringdown measurement | I measured PMC ringdowns for several input
powers. I change the input power by changing
the DC voltage to the AOM. |
|
|
15104
|
Mon Dec 23 19:30:20 2019 |
Yehonathan | Update | PSL | Mapping the PSL electronics | PSL wiring spreadsheet is ready. (But the
link was stripped. Koji)
Link |
|
|
15103
|
Fri Dec 20 18:33:21 2019 |
Yehonathan | Update | PSL | Mapping the PSL electronics | Final (hopefully) PSL channel list is attached
with allocated Acromag channels. Wiring spreadsheet
coming soon. |
|
|
15102
|
Tue Dec 17 20:45:30 2019 |
rana | Update | PSL | PMC cavity ringdown measurement | idk - I'm recently worried about the
'thermal self locking' issue we discussed.
I think you should try to measure the linewidth |
|
|
15101
|
Tue Dec 17 20:08:09 2019 |
shruti | Update | General | PLL / PM measurement of Xend NPRO PZT | 1. Some calculations
For a
Unity Gain Frequency (UGF) of 1 kHz, assumed
PZT response |
|
|
15100
|
Tue Dec 17 18:05:06 2019 |
Yehonathan | Update | PSL | Mapping the PSL electronics | Updated the channel list (Attached):
1. Removed the MC steering mirror
PZT channels |
|
|
15099
|
Tue Dec 17 00:23:28 2019 |
Yehonathan | Update | PSL | Mapping the PSL electronics | I added to the PSL wiring list the
ioo channels and the laser shutter (See attached
pdf for an updated list). |
|