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ID Date Author Type Category Subjectup Text Attachments
  16154   Sun May 23 18:28:54 2021 JonUpdateCDSOpto-isolator for c1auxeyThe new HAM-A coil drivers have a single
DB9 connector for all the binary inputs.
This requires that the dewhitening switching signals
  
  16166   Fri May 28 10:54:59 2021 JonUpdateCDSOpto-isolator for c1auxeyI have received the opto-isolator needed
to complete the new c1auxey system. I
left it sitting on the electronics bench
 optoisolator.jpeg 
  16178   Thu Jun 3 17:15:17 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyAs Jon wrote we need to use the NPN configuration
(see attachments). I tested the isolator
channels in the following way:
 Optical_Isolator_NPN_Input.pngOptical_Isolator_NPN_Output.png 
  16181   Thu Jun 3 22:08:00 2021 KojiUpdateCDSOpto-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 YehonathanUpdateCDSOpto-isolator for c1auxeyI made a diagram (Attached). I think it
explains the blue thing in the previous post.

I don't know what is the grounding
 Optical_isolator_Wiring.pdf 
  16183   Fri Jun 4 17:46:25 2021 unYehonathanUpdateCDSOpto-isolator for c1auxeyI mounted the optoisolator on the DIN rail
and connected the 3 first channels
 20210604_173420.jpg 
  16184   Sun Jun 6 03:02:14 2021 KojiUpdateCDSOpto-isolator for c1auxeyThis RTS also use the BO interface with
an opto isolator. https://dcc.ligo.org/LIGO-D1002593

Could you also include the pull
  
  16186   Sun Jun 6 12:15:16 2021 JonUpdateCDSOpto-isolator for c1auxeySince 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 YehonathanUpdateCDSOpto-isolator for c1auxeyAccording to the BO interface circuit board
https://dcc.ligo.org/D1001266,
PCIN wires are connected to the coil driver
 Optical_isolator_Wiring.pdf 
  16199   Mon Jun 14 15:31:30 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyI checked the BI situation on the HAM-A
coil driver. It seems like these are
sinking BIs and indeed need to be isolated
 Optical_isolator_Wiring.pdf 
  16203   Tue Jun 15 21:48:55 2021 KojiUpdateCDSOpto-isolator for c1auxeyIf my understanding is correct, the (photo
receiving) NPN transistor of the optocoupler
is energized through the acromag. The LED
 Acromag_RTS_BI_config.jpg 
  16205   Wed Jun 16 17:24:29 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyI updated the wiring diagram according
to Koji's suggestion. According to the
 Optical_isolator_Wiring.pdf 
  16207   Wed Jun 16 20:32:39 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyI installed 2 additional isolators in the
Acromag chassis. I set all the input channels
to PNP. I ran the digital inputs (EnableMon
  
  16243   Fri Jul 9 18:35:32 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyFollowing Koji's channel list review,
we made changes to the
wiring spreadsheet.
  
  16244   Mon Jul 12 18:06:25 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyI edited /cvs/cds/caltech/target/c1auxey1/ETMYaux.db
(after creating a backup) and added the spare
coil driver channels.
  
  16263   Wed Jul 28 12:47:52 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyTo simulate a differential output I used
two power supplies connected in series. The
outer connectors were used as the outputs
 SUS-ETMY_SparePDMon0_NoRef.pngSUS-ETMY_SparePDMon0_Ref_WithGND.pngDifferentialOutputTest.png 
  16276   Wed Aug 11 12:06:40 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyI redid the differential input experiment
using the DS360 function generator we recently
got. I generated a low frequency (0.1Hz)
 SUS-ETMY_SparePDMon0_2.png 
  16635   Tue Feb 1 15:33:28 2022 KojiSummaryBHDOptomechanics configuration for the in-vacuum aux small opticsI've summarized the optomechanics configuration
for the in-vacuum aux small optics

It's not obvious here but the
 Invac_opto_mechanics_v2.pdf 
  16640   Wed Feb 2 18:55:58 2022 KojiSummaryBHDOptomechanics configuration for the in-vacuum aux small opticsHere is more detail of the POP_SM4
mount assembly.

It's a combination of BA2V
 Screen_Shot_2022-02-02_at_6.46.46_PM.png 
  16641   Wed Feb 2 21:16:23 2022 KojiSummaryBHDOptomechanics configuration for the in-vacuum aux small opticsAsked Jordan to clean 2x 1.5" posts
(0.5 dia) and a washer with 1" dia.

 
 PXL_20220203_050156031.jpg 
  15319   Wed May 6 00:31:09 2020 gautamUpdateALSOptomechanics during CARM offset reductionSummary:

The apparent increase in the ALS
noise (witnessed in-loop, e.g. 
 CARMplant.pdfCARMplant_force2disp.pdf 
  16953   Tue Jun 28 09:03:58 2022 JCUpdateGeneralOrganizing and CleaningThe plan for
the tools in 40m

As of right now, there are 4 tool
  
  5969   Mon Nov 21 15:47:58 2011 MirkoUpdateIOOOsem loop shape[Jenne, Mirko]
To
reiterate: We changed the OSEM loop shape
 OsemFilterShape.pdf 
  13071   Fri Jun 16 23:27:19 2017 Kaustubh, JigyasaUpdateComputersOttavia Connected to the Netgear BoxI just connected the Ottavia to the Netgear
box and its working just fine. It'll
remain switched on over the weekend.
  
  13065   Thu Jun 15 14:24:48 2017 Kaustubh, JigyasaUpdateComputersOttavia Switched OnToday, I and Jigyasa connected the Ottavia
to one of the unused monitor screens Donatella.
The Ottavia CPU had a label saying 'SMOKED''.
  
  13067   Thu Jun 15 19:49:03 2017 Kaustubh, JigyasaUpdateComputersOttavia Switched OnIt has been working fine the whole day(we
didn't do much testing on it though).
We are leaving it on for the night.
  
  13068   Fri Jun 16 12:37:47 2017 Kaustubh, JigyasaUpdateComputersOttavia Switched OnOttavia had been left running overnight
and it seems to work fine. There has been
no smell or any noticeable problems in the
  
  9925   Wed May 7 23:09:06 2014 rana, jamieSummaryComputer Scripts / ProgramsOttavia back on networkAfter Jamie fixed the third party repo
issue with Ottavia, he was able to upgrade
it to Ubuntu 12.04 Precise Pangolin. But
  
  2878   Tue May 4 14:57:53 2010 josephbUpdateComputersOttavia has movedOttavia was moved this afternoon from the
control room into the lab, adjacent to Mafalda
in 1Y3 on the top shelf.  It has been
  
  11091   Tue Mar 3 04:43:12 2015 JenneOmnistructurePEMOttavia is dead? After some searching, including help from
4 security guys (I think they don't have
a lot to do at 4:30am :), we found that 
  
  10535   Wed Sep 24 18:56:45 2014 ericqUpdateGeneralOttavia slownessOttavia was having some severe interaction
latency today. Xorg was taking up >90%
of the CPU, just sitting around. The machine
  
  9144   Fri Sep 20 08:15:30 2013 SteveUpdateComputer Scripts / ProgramsOttavia, Rossa and PianosaOttavia, Rossa  and Pianosa are running
out of storage  space.
 Ottavia.pngRossa.pngPianosa.png 
  16791   Wed Apr 20 16:11:08 2022 KojiUpdateSUSOutpur resistors updated for LO1 coil drivers / for SR2, LO2, AS1, and AS4 in progress[JC Koji]

To give more alignment ranges for
the SUS alignment, we started updating the
 6x 
  16795   Thu Apr 21 15:22:44 2022 KojiUpdateSUSOutpur resistors updates for SR2, LO2, AS1, and AS4 done[JC Koji]

Quick report: JC has done all the
mods for the coil driver circuit in the morning
  
  6599   Thu May 3 19:52:43 2012 JenneUpdateCDSOutput errors from dither alignment (Xarm) scriptepicsThreadOnceOsd epicsMutexLock
failed.
Segmentation fault
  
  16973   Wed Jul 6 15:28:18 2022 TegaUpdateSUSOutput matrix diagonalisation : F2P coil balancinggit repo : https://git.ligo.org/40m/scripts/-/tree/main/SUS/OutMatCalc

local dir: 
  
  12536   Thu Oct 6 15:42:51 2016 LydiaUpdateSUSOutput matrix diagonalizationSummary: At the 40m meeting yesterday,
Eric Q. gave the suggestion that we
accept the input matrix weirdness and adjust
  
  12540   Fri Oct 7 20:56:15 2016 KojiUpdateSUSOutput matrix diagonalizationI wanted to see what is the reason to have
such large coupling between pitch and yaw
motions.
 161007_P.pdf161007_Y.pdf 
  12354   Fri Jul 29 13:17:34 2016 KojiUpdateGeneralOvenWhile the air bake oven situation is being
improved, how about to buy a cheepo toaster
oven at Target, BestBuy, or anywhere?
  
  14073   Mon Jul 16 15:07:19 2018 KojiSummaryVACOven C vent[Steve Koji]

- Attachment1: Removed the thermal
cap. Checked the temperature of the oven.
 P_20180716_141512.jpgP_20180716_141601.jpgP_20180716_141610.jpgP_20180716_141827.jpgP_20180716_143901.jpg 
  15528   Sat Aug 15 15:12:22 2020 JonConfigurationVACOverhaul of small turbo pump interlocksSummary

Yesterday I completed
the switchover of small turbo pump interlocks
as proposed in ELOG
 small_tp_signal_routing.pngsmall_tp_interlock_signal.pngsmall_tp_signal_routing.pngmedm_screen.png 
  273   Sat Jan 26 02:34:34 2008 AndreyUpdateComputer Scripts / ProgramsOvernight Measuremts in XARM
I am running the program for measuring RMS
of peaks in XARM tonight. I just started
  
  12179   Tue Jun 14 19:37:40 2016 jamieUpdateCDSOvernight daqd test underwayI'm running another overnight test
with new daqd software on fb1.  The
normal daqd process on fb has been shutdown,
  
  2541   Fri Jan 22 02:54:06 2010 AlbertoUpdateABSLOvernight measurementI'm leaving a measurement running overnight.
It should be done in about one hour.
Tomorrow morning, If you need to
  
  2543   Fri Jan 22 14:40:49 2010 AlbertoUpdateABSLOvernight measurement

    
        
 2010-01-21_PRCtransmissivityVsModel.png 
  191   Thu Dec 13 23:56:02 2007 AndreyConfigurationComputer Scripts / ProgramsOvernight measurements
[COLOR=blue]After my disease[/COLOR] (fever,
vomitting, nose problem, overall weakness)
  
  194   Mon Dec 17 23:42:08 2007 AndreyConfigurationComputer Scripts / ProgramsOvernight measurements in X-arm
I am making overnight measurements this night
(from Monday to Tuesday) in XARM.
  
  9909   Mon May 5 19:26:43 2014 JenneUpdateLSCOverride ability for whitening triggering Today I finally implemented a feature
in the whitening triggering that I should
have a long time ago:  an override button.
  
  3344   Sun Aug 1 18:50:35 2010 KojiUpdateVACP1 = 0.48 torrI resumed the pumping today. Now the pressure
is 0.48 torr. The pump was stopped.

  
  14844   Tue Aug 13 08:07:09 2019 gautamUpdateCDSP1--->P2This morning, I wanted to move the existing
cables going to the P1 connectors of the
iLIGO whitening boards to the P2 connector,
  
ELOG V3.1.3-