ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16140
|
Fri May 14 03:29:50 2021 |
Koji | Update | Electronics | HV Driver noise test with the new HV power supply from Matsusada | I believe I did the identical test with
the one in [40m
ELOG 15786]. The + input of PA95 was |
|
|
16141
|
Fri May 14 17:45:05 2021 |
rana | Update | PSL | HEPA speed raised | The PSL was too hot, so I turned on the
south HEPA on the PSL. The north one was
on and the south one was off (or so slow |
|
|
16142
|
Sat May 15 12:39:54 2021 |
gautam | Update | PSL | NPRO tripped/switched off | The NPRO has been off since ~1AM this morning
it looks like. |
|
|
16143
|
Sat May 15 14:54:24 2021 |
gautam | Update | SUS | IMC settings reverted | I want to work on the IFO this weekend,
so I reverted the IMC suspension settings
just now to what I know work (until the new |
|
|
16144
|
Tue May 18 00:52:38 2021 |
rana | Update | PSL | HEPA speed raised | Looks like the fan lowered the temperature
as expected. Need to get a few more days
of data to see if its stabilized, or if that's |
|
|
16145
|
Tue May 18 20:26:11 2021 |
rana | Update | PSL | HEPA speed raised | Fluke. Temp fluctuations
are as usual, but the overall temperature
is still lower. We ought to put some temperature |
|
|
16146
|
Wed May 19 18:29:41 2021 |
Koji | Update | SUS | Mass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI units | Calculation for the SOS POS/PIT/YAW resonant
frequencies
- Nominal height gap between the |
|
|
16147
|
Thu May 20 10:35:57 2021 |
Anchal | Update | SUS | IMC settings reverted | For future reference, the new settings
can be upoaded from a script in the same
directory. Run python /users/anchal/20210505_IMC_Tuned_SUS_with_Gains/uploadNewConfigIMC.py |
|
|
16148
|
Thu May 20 16:56:21 2021 |
Koji | Update | Electronics | Production version of the HV coil driver tested with KEPCO HV supplies | HP HV power supply ( HP6209
) were returned to Downs |
|
|
16149
|
Fri May 21 00:05:45 2021 |
Koji | Update | SUS | New electronics: Sat Amp / Coil Drivers | 11 new Satellite Amps were picked up from
Downs. 7 more are coming from there. I have
one spare unit I made. 1 sat amp has already |
|
|
16150
|
Fri May 21 00:15:33 2021 |
Koji | Update | Electronics | DC Power Strip delivered / stored | DC Power Strip Assemblies delivered and
stored behind the Y arm tube (Attachment
1) |
9x |
|
16151
|
Fri May 21 09:44:52 2021 |
Ian MacMillan | Update | CDS | SUS simPlant model | The transfer function given in the previous
post was slightly incorrect the units
did not make sense the new function is: |
|
|
16152
|
Fri May 21 12:12:11 2021 |
Paco | Update | NoiseBudget | AUX PDH loop identification | [Anchal, Paco]
We went into 40m to identify where
XARM PDH loop control elements are. We didn't |
|
|
16153
|
Fri May 21 14:36:20 2021 |
Ian MacMillan | Update | CDS | SUS simPlant model | The plant transfer function of the pendulum
in the s domain is:
|
|
|
16154
|
Sun May 23 18:28:54 2021 |
Jon | Update | CDS | Opto-isolator for c1auxey | The new HAM-A coil drivers have a single
DB9 connector for all the binary inputs.
This requires that the dewhitening switching signals |
|
|
16155
|
Mon May 24 08:38:26 2021 |
Chub | Update | Electronics | 18-bit AI, 16-bit AI and 16-bit AA | - High priority units: 2x 18AI / 1x 16AI
/ 3x 16AA
All six are reworked and on the |
|
|
16156
|
Mon May 24 10:19:54 2021 |
Paco | Update | General | Zita IOO strip | Updated IOO.strip on Zita to show WFS2
pitch and yaw trends (C1:IOO-WFS2_PIY_OUT16 |
|
|
16157
|
Mon May 24 19:14:15 2021 |
Anchal, Paco | Summary | SUS | MC1 Free Swing Test set to trigger | We've set a free swing test to trigger
at 3:30 am tomorrow for MC1. The script for
tests is running on tmux session named 'freeSwingMC1' |
|
|
16158
|
Mon May 24 20:55:00 2021 |
Koji | Summary | BHD | How to align two OMCs on the BHD platform? | Differential
misalignment of the OMCs
40m BHD will employ two OMCs on |
|
|
16159
|
Tue May 25 10:22:16 2021 |
Anchal, Paco | Summary | SUS | MC1 new input matrix calculated and uploaded | The test was succesful and brought back
the IMC to lock point at the end.
We calculated new input matrix |
|
|
16160
|
Tue May 25 17:08:17 2021 |
Chub | Update | Electronics | chassis rework complete! | All remaining chasses have been reworked
and placed on the floor along the west wall
in Room 104. |
|
|
16161
|
Tue May 25 17:42:11 2021 |
Anchal, Paco | Summary | ALS | ALS Single Arm Noise Budget | Here is our first attempt at a single-arm
noise budget for ALS.
Attachment 1 shows |
|
|
16162
|
Wed May 26 02:00:44 2021 |
gautam | Update | Electronics | Coil driver noise | I was preparing a short write-up / test
procedure for the custom HV coil driver,
when I thought of something I can't resolve. |
|
|
16163
|
Wed May 26 11:45:57 2021 |
Anchal, Paco | Configuration | IMC | MC2 analog camera | [Anchal, Paco]
We went near the MC2 area and opened
the lid to inspect the GigE and analog video |
|
|
16164
|
Thu May 27 11:03:15 2021 |
Anchal, Paco | Summary | ALS | ALS Single Arm Noise Budget | Here's an updated X ARM ALS noise budget.
Things to remember:
Major
mistake we were making earlier was that we |
|
|
16165
|
Thu May 27 14:11:15 2021 |
Jordan | Update | SUS | CoM to Clamping Point Measurement for 3" Adapter Ring | The current vertical distance between the
CoM and the wire clamping point on the 3"
Ring assembly is 0.33mm. That is the CoM |
|
|
16166
|
Fri May 28 10:54:59 2021 |
Jon | Update | CDS | Opto-isolator for c1auxey | I have received the opto-isolator needed
to complete the new c1auxey system. I
left it sitting on the electronics bench |
|
|
16167
|
Fri May 28 11:16:21 2021 |
Jon | Update | CDS | Front-End Assembly and Testing | An update on recent progress in the lab
towards building and testing the new FEs.
1. Timing problems resolved / |
|
|
16168
|
Fri May 28 17:32:48 2021 |
Anchal | Summary | ALS | Single Arm Actuation Calibration with IR ALS Beat | I attempted a single arm actuation calibration
using IR beatnote (in the directions of soCal
idea for DARM calibration) |
|
|
16169
|
Tue Jun 1 14:26:23 2021 |
Jordan | Update | SUS | CoM to Clamping Point Measurement for 3" Adapter Ring | After changing the material of the Balance
Mass from 6061 Al to 304 Steel, and changing
the thickness to 0.21" from 0.25". |
|
|
16170
|
Tue Jun 1 16:17:06 2021 |
Yehonathan | Update | BHD | SOS assembly | I tried to push the clean Viton tips into
the vented screws just to find out that the
vented holes are too small. We need to drill |
|
|
16171
|
Tue Jun 1 16:55:32 2021 |
Anchal, Paco | Summary | ALS | Single Arm Actuation Calibration with IR ALS Beat | Rana suggested in today's meeting to
put in a notch filter in the XARM IR PDH
loop to avoid suppressing the excitation |
|
|
16172
|
Wed Jun 2 01:03:19 2021 |
Koji | Update | BHD | SOS assembly | Can you just cut the viton tips smaller?
If you cut it to have some wedge (or say,
taper), it can get stuck with the vent hole. |
|
|
16173
|
Wed Jun 2 01:08:57 2021 |
Koji | Update | SUS | CoM to Clamping Point Measurement for 3" Adapter Ring | How about to use the non-Ag coated threaded
shaft + the end SS masses with helicoils
inserted? Does this save the masses to get |
|
|
16174
|
Wed Jun 2 09:43:30 2021 |
Anchal, Paco | Summary | SUS | IMC Settings characterization | Plot description:
We
picked up three 10 min times belonging to
the three different configurations:
'Old |
|
|
16175
|
Wed Jun 2 16:20:59 2021 |
Anchal, Paco | Summary | SUS | IMC Suspension gains reverted to old values | Following the conclusion, we are reverting
the suspension gains to old values, i.e.
|
|
|
16176
|
Wed Jun 2 17:50:50 2021 |
Paco | Update | Equipment loan | Borrow red cart | I borrowed the little red cart 🛒
to help clear the path for new optical tables
in B252 West Bridge. Will return once I am |
|
|
16177
|
Thu Jun 3 13:06:47 2021 |
Ian MacMillan | Update | CDS | SUS simPlant model | I was able to measure the transfer function
of the plant filter module from the channel X1:SUP-C1_SUS_SINGLE_PLANT_Plant_POS_Mod_EXC
to X1:SUP-C1_SUS_SINGLE_PLANT_Plant_POS_Mod_OUT. |
|
|
16178
|
Thu Jun 3 17:15:17 2021 |
Yehonathan | Update | CDS | Opto-isolator for c1auxey | As Jon wrote we need to use the NPN configuration
(see attachments). I tested the isolator
channels in the following way: |
|
|
16179
|
Thu Jun 3 17:35:31 2021 |
Anchal | Summary | IMC | Fixed medm button | I fixed the PSL shutter button on Shutters
summary page C1IOO_Mech_Shutter.adl. Now
PSL switch changes C1:PSL-PSL_ShutterRqst |
|
|
16180
|
Thu Jun 3 17:49:46 2021 |
Paco | Update | Equipment loan | Borrow red cart | Returned today.
|
|
|
16181
|
Thu Jun 3 22:08:00 2021 |
Koji | Update | CDS | Opto-isolator for c1auxey | - Could you explain what is the blue thing
in Attachment 1?
- To check the validity of the |
|
|
16182
|
Fri Jun 4 14:49:23 2021 |
Yehonathan | Update | CDS | Opto-isolator for c1auxey | I made a diagram (Attached). I think it
explains the blue thing in the previous post.
I don't know what is the grounding |
|
|
16183
|
Fri Jun 4 17:46:25 2021 |
unYehonathan | Update | CDS | Opto-isolator for c1auxey | I mounted the optoisolator on the DIN rail
and connected the 3 first channels
|
|
|
16184
|
Sun Jun 6 03:02:14 2021 |
Koji | Update | CDS | Opto-isolator for c1auxey | This RTS also use the BO interface with
an opto isolator. https://dcc.ligo.org/LIGO-D1002593
Could you also include the pull |
|
|
16185
|
Sun Jun 6 08:42:05 2021 |
Jon | Update | CDS | Front-End Assembly and Testing | Here is an update and status report on
the new BHD front-ends (FEs).
Timing
The changes |
|
|
16186
|
Sun Jun 6 12:15:16 2021 |
Jon | Update | CDS | Opto-isolator for c1auxey | Since this Ocean Controls optoisolator
has been shown to be compatible, I've
gone ahead and ordered 10 more: |
|
|
16187
|
Sun Jun 6 15:59:51 2021 |
Yehonathan | Update | CDS | Opto-isolator for c1auxey | According to the BO interface circuit board
https://dcc.ligo.org/D1001266,
PCIN wires are connected to the coil driver |
|
|
16188
|
Sun Jun 6 16:33:47 2021 |
Jon | Update | CDS | BI channels on c1auxey |
There |
|
|
16189
|
Mon Jun 7 13:14:20 2021 |
Yehonathan | Update | CDS | BI channels on c1auxey | I added a new XT1111 Acromag module to
the c1auxey chassis. I sanitized and configured
it according to the slow |
|