| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16126
|
Fri May 7 11:19:29 2021 |
Ian MacMillan | Update | CDS | SUS simPlant model | I copied c1scx.mdl
to the docker to attach to the plant using
the commands: |
|
|
16127
|
Fri May 7 11:54:02 2021 |
Anchal, Paco | Update | LSC | IMC WFS noise contribution in arm cavity length noise | We today measured the calibration factors
for XARM_OUT and YARM_OUT in nm/cts and replotted
our results from 16117 |
|
|
16129
|
Mon May 10 18:19:12 2021 |
Anchal, Paco | Update | LSC | IMC WFS noise contribution in arm cavity length noise, Corrections | A few corrections to last analysis:
The first plot was not
IMC frequency noise but actually MC_F noise |
|
|
16130
|
Tue May 11 16:29:55 2021 |
Jon | Update | CDS | I/O Chassis Assembly |
Quote:
|
|
|
16131
|
Tue May 11 17:43:09 2021 |
Koji | Update | CDS | I/O Chassis Assembly | Did you match the local PC time with the
GPS time? |
|
|
16132
|
Wed May 12 10:53:20 2021 |
Anchal, Paco | Update | LSC | PSL-IMC PDH Loop and XARM PDH Loop diagram | Attached is the control loop diagram when
main laser is locked to IMC and a single
arm (XARM) is locked to the transmitted light |
|
|
16134
|
Wed May 12 13:06:15 2021 |
Ian MacMillan | Update | CDS | SUS simPlant model | Working with Chris, we decided that it
is probably better to use a simple filter
module as a controller before we make the |
|
|
16135
|
Wed May 12 14:23:20 2021 |
Jordan | Update | SUS | Mass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI units | |
|
|
16136
|
Wed May 12 16:53:59 2021 |
Koji | Update | SUS | Mass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI units | No, this is the property of the suspension
assembly. The mass says 10kg
Could you do the same for the testmass |
|
|
16137
|
Wed May 12 17:06:52 2021 |
Jordan | Update | SUS | Mass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI units | Here are the mass properties for the only
the test mass assembly (optic, 3" ring,
and wire block). (Updated with g*mm^2) |
|
|
16138
|
Thu May 13 11:55:04 2021 |
Anchal, Paco | Update | SUS | MC1 suspension misbehaving | We came in the morning with the following
scene on the zita monitor:
|
|
|
16139
|
Thu May 13 19:38:54 2021 |
Anchal | Update | SUS | MC1 Satellite Amplifier Debugged | [Anchal Koji]
Koji and I did a few tests with
an OSEM emulator on the satellite amplifier |
|
|
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 |
|
|
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. |
|
|
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. |
|
|
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 / |
|
|
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 |
|
|
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 |
|
|
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: |
|
|
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 |
|