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ID Date Author Type Categoryup Subject Text Attachments
  14201   Thu Sep 20 08:17:14 2018 SteveUpdateSUSlocal 3.4M earth quakeM3.4 Colton shake did not trip sus.

 
 local_3.4M.png 
  14223   Mon Oct 1 22:20:42 2018 gautamUpdateSUSPrototyping HV Bias CircuitSummary:

I've been plugging away at
Altium prototyping the high-voltage bias
 CoilDriverBias.pdfcurrentNoise.pdfPSRR.pdf 
  14261   Thu Oct 18 00:27:37 2018 KojiUpdateSUSSUS PD Whitening board inspection[Gautam, Koji]

As a part of the preparation for
the replacement of c1susaux with Acromag,
 43.png 
  14319   Mon Nov 26 17:16:27 2018 gautamUpdateSUSEY chamber work[steve,
rana, gautam]


PSL and EY 1064nm laser
 IMG_5251.JPG 
  14399   Tue Jan 15 10:52:38 2019 gautamUpdateSUSEY door opened[chub, bob, gautam]

We took the heavy door off the
EY chamber at ~930am.
  
  14401   Tue Jan 15 15:49:47 2019 gautamUpdateSUSEY door openedWhile restoring OSEMs on ETMY, I noticed
that the open voltages for the UR and LL
OSEMs had significantly (>30%) changed
 EY_OSEMs.png 
  14403   Wed Jan 16 16:25:25 2019 gautamUpdateSUSYarm locked[chub, gautam]

Summary:

Y arm was locked at low power in
 Yarm_locked.png 
  14407   Fri Jan 18 21:34:18 2019 gautamUpdateSUSUnused optic on EY tableDoes anyone know what the purpose of the
indicated optic in Attachment #1 is? 
 IMG_5408.JPG 
  14408   Sat Jan 19 05:07:45 2019 KojiUpdateSUSUnused optic on EY tableI don't think it was used. It is not
on the diagram too. You can remove it.
  
  14409   Sat Jan 19 15:33:18 2019 gautamUpdateSUSETMY OSEMs faultyAfter diagnosis with the tester box, as
I suspected, the fully open DC voltages on
the two problematic channels, LL and UR,
 Screen_Shot_2019-01-19_at_3.32.35_PM.pngETMY_sensors_1231832635.pdf 
  14411   Tue Jan 22 20:36:53 2019 gautamUpdateSUSETMY OSEMs faultyShort update on latest Satellite box woes.


I checked the resistance
of all 5 OSEM coils on ETMY using a DB25
  
  14413   Wed Jan 23 12:39:18 2019 gautamUpdateSUSEY chamber workWhile Chub is making new cables for the
EY satellite box...


I removed the unused
 6x 
  14415   Wed Jan 23 23:12:44 2019 gautamUpdateSUSPrep for FC cleaningIn preparation for the FC cleaning, I did
the following:


Set up mini-cleanroom at
 IY_level_before.pdf 
  14416   Thu Jan 24 15:32:31 2019 gautamUpdateSUSY arm cavity side first contact appliedEY:


A clean cart was setup
adjacent to the HEPA-enclosed mini cleanroom
 Yarm_FC.pdfOSEMfilter.png 
  14422   Tue Jan 29 22:12:40 2019 gautamUpdateSUSAlignment prepSince we may want to close up tomorrow,
I did the following prep work:


Cleaned up Y-end suspension
  
  14423   Wed Jan 30 11:54:24 2019 gautamUpdateSUSMore alignment prep[chub,
gautam]


ETMY cage was wiped down

Targeted
 IMG_5958.JPGIMG_5962.JPG 
  14424   Wed Jan 30 19:25:40 2019 gautamUpdateSUSXarm cavity alignmentSquishing cables at the ITMX satellite
box seems to have fixed the wandering ITM
that I observed yesterday - the sooner we
 Xarm.pngXarm_IR.png 
  14425   Fri Feb 1 01:24:06 2019 gautamUpdateSUSAlmost ready for pumpdown tomorrow[koji, chub, jon, rana, gautam]

Full story tomorrow, but we went
through most of the required pre close-up
  
  14426   Fri Feb 1 13:16:50 2019 gautamUpdateSUSPumpdown 83 underway[chub, bob, gautam]


Steps described in previous
elog were carried out
EY heavy
  
  14427   Fri Feb 1 14:44:14 2019 gautamUpdateSUSY arm FC cleaning and reinstall[Attachment
#1]: ITMY HR face
 IMG_5974.JPGIMG_5986.JPGIMG_5992.JPG 
  14428   Fri Feb 1 21:52:57 2019 gautamUpdateSUSPumpdown 83 underway[jon, koji, gautam]


IFO is at ~1 mtorr, but
pressure is slowly rising because of outgassing
  
  14433   Mon Feb 4 20:13:39 2019 gautamUpdateSUSETMY suspension oddnessI looked at the free-swinging sensor data
from two nights ago, and am struggling with
the interpretation. 
 ETMY_sensors_1_Feb_2019_2230_PST.pdfETMY_UL.pdfETMY_sensors_timeDomain.pdf 
  14441   Thu Feb 7 19:34:18 2019 gautamUpdateSUSETMY suspension oddnessI did some tests of the electronics chain
today.


Drove a sine-wave using
 ETMY_sensors.pdfpostDiag.pdf 
  14443   Fri Feb 8 02:00:34 2019 gautamUpdateSUSITMY has tendency of getting stuckAs it turns out, now ITMY has a tendency
to get stuck. I found it MUCH
more difficult to release the optic using
 Screenshot_from_2019-02-08_02-04-22.png 
  14470   Mon Feb 25 20:20:07 2019 KojiUpdateSUSDIN 41612 (96pin) shrouds installed to vertex SUS coil driversThe forthcoming Acromag c1susaux is
supposed to use the backplane connectors
of the sus euro card modules.
 P_20190222_175058.jpg 
  14499   Thu Mar 28 23:29:00 2019 KojiUpdateSUSSuspension PD whitening and I/F boards modified for susaux replacementNow
the sus PD whitening bards
are ready to move the 
 IMG_7474.JPGD000210_backplane.pdfScreenshot_from_2019-03-28_23-28-23.png 
  14536   Thu Apr 11 12:04:43 2019 JonUpdateSUSStarting some scripted SUS tests on ITMYWill advise when I'm finished, will
be by 1 pm for ALS work to begin.
  
  14538   Thu Apr 11 12:57:48 2019 JonUpdateSUSStarting some scripted SUS tests on ITMYTesting is finished.




  
  14539   Thu Apr 11 17:30:45 2019 JonUpdateSUSAutomated suspension testing with susPythonSummary

In anticipation of
needing to test hundreds of suspension
signals after the c1susaux upgrade, I've
  
  14551   Thu Apr 18 22:35:23 2019 gautamUpdateSUSETMY actuator diagnosis [rana, gautam]

Rana did a checkout of my story
  
  14554   Fri Apr 19 11:36:23 2019 gautamUpdateSUSNo consistent solution for output matrixTher isn't a consistent set of OSEM
coil gains that explains the best actuation
vectors we determined yesterday. Here are
  
  14557   Fri Apr 19 15:13:38 2019 ranaUpdateSUSNo consistent solution for output matrixlet us
have 3 by 4, nevermore
  
  14558   Fri Apr 19 16:19:42 2019 gautamUpdateSUSActuation matrix still not orthogonalI repeated the exercise from yesterday,
this time driving the butterfly mode [+1
-1 -1 +1] and adding the tuned PIT and
  
  14559   Fri Apr 19 19:22:15 2019 ranaUpdateSUSActuation matrix still not orthogonalIf thy left hand troubles thee

then let the mirror show the right

for if it troubles enough to cut
  
  14561   Mon Apr 22 21:33:17 2019 JonUpdateSUSBench testing of c1susaux replacementToday I bench-tested most of the Acromag
channels in the replacement c1susaux. I connected
a DB37 breakout board to each chassis feedthrough
  
  14562   Mon Apr 22 22:43:15 2019 gautamUpdateSUSETMY sensor diagnosis Here are the results from this test. The
data for 17 April is with the DC bias for
ETMY set to the nominal values (which gives
 ETMY_sensorSpectra_consolidated.pdf 
  14563   Tue Apr 23 18:48:25 2019 JonUpdateSUSc1susaux bench testing completedToday I tested the remaining Acromag channels and
retested the non-functioning channels found
yesterday, which Chub repaired this morning.
  
  14564   Tue Apr 23 19:31:45 2019 JonUpdateSUSWatchdog channels separated from autoBurt.reqFor the new c1susaux, Gautam and I moved
the watchdog channels from autoBurt.req to
a new file named autoBurt_watchdogs.req. When
  
  14567   Wed Apr 24 17:07:39 2019 gautamUpdateSUSc1susaux in-situ testing [and future of IFOtest][jon, gautam]

For the in-situ test, I decided
that we will use the physical SRM to test
 2019-04-24_20-29.pdfScreenshot_from_2019-04-24_20-05-54.pngSRM_OSEMPD_WHT_ACROMAG.pdfDCVmon.png 
  14569   Thu Apr 25 00:30:45 2019 gautamUpdateSUSETMY BR mode We briefly talked about the bounce and
roll modes of the SOS optic at the meeting
today. 
 ETMY_sensorSpectra_BRmode.pdfETMY_sensorSpectra_BRmode.pdfETMX_sensorSpectra_BRmode.pdfIMG_5993.JPG 
  14581   Fri Apr 26 19:35:16 2019 JonUpdateSUSNew c1susaux installed, passed first round of scripted testing[Jon, Gautam]

Today we installed the c1susaux
Acromag chassis and controller computer in
 IMG_3254.jpgIMG_3256.jpg 
  14587   Thu May 2 10:41:50 2019 gautamUpdateSUSSOS Magnet polarityA concern was raised about the two ETMs
and ITMX having the opposite response (relative
to the other 7 SOS optics) in the OSEM PDmon
  
  14588   Thu May 2 10:59:58 2019 JonUpdateSUSc1susux in situ wiring testing completedSummary

Yesterday Gautam and
I ran final tests of the eight suspensions
controlled by c1susaux, using PyIFOTest.
 Screen_Shot_2019-05-02_at_12.15.39_PM.pngScreen_Shot_2019-05-02_at_12.23.21_PM.pngScreen_Shot_2019-05-02_at_12.30.53_PM.png 
  14591   Fri May 3 09:12:31 2019 gautamUpdateSUSAll vertex SUS watchdogs were trippedI found the 8 vertex watchdogs tripped
today morning. The ETMs were fine, suggesting
this was not an actual earthquake. I suspect
 SUSwatchdogs.png 
  14592   Fri May 3 12:48:40 2019 gautamUpdateSUS1X4/1X5 cable adminChub and I crossed off some of these items
today morning. The last bullet was addressed
by Jon yesterday. I added a couple of
 D38CC485-1EB6-4B34-9EB1-2CB1E809A21A.jpeg 
  14596   Mon May 6 11:05:23 2019 JonUpdateSUSAll vertex SUS watchdogs were trippedYes, this was a consequence of the systemd
scripting I was setting up. Unlike the old
susaux system, we decided for safety NOT
  
  14608   Wed May 15 00:40:19 2019 gautamUpdateSUSETMY diagnosis planI collected some free-swinging data from
earlier today evening. There are still only
3 peaks visible in the ASDs, see Attachment
 ETMY_sensorSpectra.pdf 
  14610   Wed May 15 10:57:57 2019 gautamUpdateSUSEY chamber opened[chub, gautam]


Vented the EE annulus.
Took
the heavy door off, put it on the wooden
  
  14611   Wed May 15 17:46:24 2019 gautamUpdateSUSETMY inspectionI setup the usual mini-cleanroom setup
around the ETMY chamber. Then I carried out
the investigative plan outlined here.
 firstContactFiber.JPGETMY_sensorSpectra.pdf 
  14612   Wed May 15 19:36:29 2019 KojiUpdateSUSETMY instepctionA pair of tweezer is OK as long as there
is no magnets around. You need to (somewhat)
constrain the mirror with the EQ stops so
  
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