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  40m Log, Page 108 of 341  Not logged in ELOG logo
ID Date Author Type Categoryup Subject Text Attachments
  13632   Tue Feb 13 22:35:21 2018 gautamUpdateElectronicsPSL table power supply cleanupThe main motivation
for this work is that I want +15VDC power
  
  13633   Wed Feb 14 17:49:22 2018 gautamUpdateElectronicsPSL table power supply cleanup[steve,
gautam]
 IMG_5135.JPGSorensens_1X1_before.JPGSorensens_1X1_after.JPG 
  13645   Wed Feb 21 00:04:27 2018 gautamUpdateElectronicsTemporary RF power monitor setupI made a voltage divider using a 20.47kohm
and 1.07kohm (both values measured with a
DMM). The whole thing is packaged inside
 RFbeatAmp.pngBeatMouthX_RFAM_20180221.pdf 
  13649   Thu Feb 22 10:49:11 2018 SteveUpdateElectronicsrack power supplies checkedAll rack power supplies labeled if their
load changed.

 
 8x 
  13665   Mon Mar 5 11:58:24 2018 gautamUpdateElectronicsThree opamps walked onto an AA boardFor testing the new IR ALS noise, we had
decided that we would like to use the differential
output of the demodulated ALS beat signal,
 AA_TF.pdfAA_noise.pdf 
  13667   Wed Mar 7 12:04:14 2018 gautamUpdateElectronicsThree opamps walked onto an AA boardHere are the plots. Comments:


Measurement
and model agree quite well 
 AA_TF.pdfAA_noise.pdfD070081_LTspiceFiles.zip 
  13671   Thu Mar 8 15:23:16 2018 gautamUpdateElectronicsNew DC power ports at c1lsc[Koji,
Gautam]
  
  13802   Tue May 1 08:04:13 2018 Jon RichardsonConfigurationElectronicsPSL-Aux. Laser Phase-Locked Loop[Jon, Gautam, Johannes]

Summary: In
support of making a proof-of-concept RF measurement
 IMG_2553.jpgIMG_2551.jpgIMG_2552.jpgsrc_gouy_phase_v3.pdf 
  13813   Thu May 3 20:29:39 2018 gautamConfigurationElectronicsPSL-Aux. Laser Phase-Locked LoopSome notes about the setup and work at
the PSL table today, Jon can add to / correct
me.
  
  13814   Fri May 4 13:24:56 2018 Jon RichardsonConfigurationElectronicsAUX-PSL PLL Implementation & CharacterizationAttached are final details of the phase-locked
loop (PLL) implementation we'll
use for slaving the AUX 700 mW NPRO laser
 PLL_Schematic.pdfPLL_AUX-PSL_40m.pdf 
  13816   Fri May 4 19:06:28 2018 ranaConfigurationElectronicsAUX-PSL PLL Implementation & Characterizationthis doesn't make much sense to me;
the phase to frequency conversion (mixer-demod
to PZT ) should give us a 1/f loop as Johannes
  
  13845   Tue May 15 20:51:27 2018 gautamConfigurationElectronicsMaking PLL setup more permanent[jon, steve, gautam]

Some points which Jon will elaborate
  
  13848   Wed May 16 18:52:50 2018 gautamConfigurationElectronicsPLL mysteries solved[Koji,
Gautam]

Summary:
 PLLanalysis.pdfPZTcal.pdfSR560_funkiness.pdf 
  13858   Thu May 17 13:51:35 2018 Jon RichardsonConfigurationElectronicsDocumentation & Schematics for AUX-PSL PLL[Jon, Gautam]

Attached is supporting documentation
for the AUX-PSL PLL electronics installed
  
  13863   Fri May 18 14:18:03 2018 gautamConfigurationElectronicsBasic MEDM Control Screen setupI setup a basic MEDM screen for remote
control of the PLL.

The Slow control voltage slider
 AUX_PLL_CTRL.png 
  13867   Fri May 18 19:59:55 2018 Jon RichardsonConfigurationElectronicsAUX-PSL PLL Characterization MeasurementsBelow is analysis of measurements
I had taken of the AUX-PSL PLL using an SR560
as the servo controller (1 Hz single-pole
 SR560_OL.pdfSR560_CL.pdf 
  13869   Sun May 20 17:43:01 2018 ranaUpdateElectronicsHow to choose resistorsArticle
from EE Times, describing why metal foil
(NOT metal film) resistors are really better
  
  13873   Mon May 21 15:34:19 2018 gautamConfigurationElectronicsChannel hijacking historySince we've been hijacking channels
like there is no tomorrow for the AUX-PLL
setup, I'm documenting the channel names
  
  13876   Tue May 22 10:14:39 2018 Jon RichardsonConfigurationElectronicsDocumentation & Schematics for AUX-PSL PLL 




 Schematic_PLL.pdf 
  13891   Fri May 25 13:06:33 2018 Jon RichardsonConfigurationElectronicsImproved Measurements of AUX-PSL PLLAttached are gain-variation measurements
of the final, in situ AUX-to-PSL phase-locked
loop (PLL).
 LB1005_OL_transfer.pdfdata.tar.gz 
  13998   Thu Jun 21 15:32:05 2018 gautamUpdateElectronicsEX AA filter range change[steve, gautam]

I took this opportunity of EX downtime
to change the supply voltage for the AA unit
  
  14024   Wed Jun 27 18:12:04 2018 gautamUpdateElectronicsCoil driver dewhiteningSummary:

I've been thinking about what
we need to do to the de-whitening boards
 DeWhiteningSketch.pdf 
  14112   Sun Jul 29 00:59:54 2018 KojiUpdateElectronicsCharacterization of Transimpedance AmplifierYou have this measurement problem when
the IF bandwidth is larger than the measurement
frequency. I suspect the IF bandwidth is
  
  14125   Thu Aug 2 20:47:29 2018 gautamSummaryElectronicsX Green "Mystery" solvedI walked
down to the X end and found that the entire
  
  14128   Fri Aug 3 14:35:56 2018 gautamSummaryElectronicsEX AUX electronics power restoredSteve and I restored the power to the EX
AUX electronics rack. The power strip on
the lowest shelf of the AUX rack now
  
  14175   Wed Aug 22 00:22:05 2018 KojiSummaryElectronicsInspection of the possible dual backplane interfaces for Acromag DAQ[Johannes, Koji]

We went around the LSC, PSL, IOO,
and SUS racks to check how many dual backplane
  
  14177   Wed Aug 22 12:22:27 2018 ranaSummaryElectronicsInspection of the possible dual backplane interfaces for Acromag DAQI think we don't need to keep Crystal
Ref: we can change this into a regular Wenzel
box with no outside control or monitoring.
  
  14273   Tue Nov 6 10:03:02 2018 SteveUpdateElectronicsContec board foundThe Contec test board with Dsub37Fs was
on the top shelf of E7
 DSC01836.JPG 
  14414   Wed Jan 23 18:11:56 2019 gautamUpdateElectronicsEthernet Power Strip IP conflictFor the last week, I noticed that I was
unable to turn the EY chamber illuminator
on using the remote python scripts. This
  
  14417   Thu Jan 24 22:55:50 2019 gautamUpdateElectronicsSatellite box S/N 102 investigationI had taken Satellite box S/N 102, from
the SRM suspension, down to the Y-end as
part of debugging. However, at some point,
 IMG_7294.JPGD961289-B2.pdf 
  14418   Fri Jan 25 12:49:53 2019 gautamUpdateElectronicsEthernet Power Strip IP conflict resolvedTo avoid the annoying excercise of having
to manually toggle the illuminators, I solved
the IP conflict. Made a wiki
  
  14421   Tue Jan 29 17:19:16 2019 gautamUpdateElectronicsSatellite box S/N 105 repaired[chub,
koji, gautam]

 IMG_7301.JPG 
  14555   Fri Apr 19 12:06:31 2019 awadeBureaucracyElectronicsBorrowed Busby Box May 19th 2019I've borrowed the Busby Box for a day
or so.  Location: QIL lab at Bridge
West.
  
  14584   Mon Apr 29 16:34:27 2019 gautamUpdateElectronicsITMX/IMTY mis-labelling fixed at 1X4 and 1X5After the X and Y arm naming conventions
were changed, the labelling of the electronics
in the eurocrates was not changed 😞
 IMG_7400.JPGIMG_7401.JPG 
  14669   Thu Jun 13 15:08:31 2019 MilindUpdateElectronicsVCO pickup by RichRich dropped by at around 3:00 PM today
and picked up the VCO in Attachment #1 and
left the note in Attachment #2 on Gautam's
 WhatsApp_Image_2019-06-13_at_15.06.57.jpegWhatsApp_Image_2019-06-13_at_15.06.57(1).jpeg 
  14718   Tue Jul 2 12:30:53 2019 gautamUpdateElectronicsAcromag crate switched to Sorensens[chub, gautam]

We crossed off another couple of
 1X5Sorensens.pdfCDS_20190702.png 
  14754   Thu Jul 11 18:15:22 2019 gautamSummaryElectronicsPSL/IOO rack checkoutI looked at the PSL/IOO racks to check
for which boards, if any, require an additional
P2 interface, so that we can try and design
  
  14839   Fri Aug 9 20:58:33 2019 JonUpdateElectronicsBorrowed Variac transformerI borrowed an old-looking Variac variable
transformer from the power supplies cabinet
along the y-arm. It is currently in
  
  14945   Mon Oct 7 14:51:20 2019 aaronUpdateElectronicsWFS head RF measurementsMon Oct 7 14:51:53 2019. I closed the PSL
shutter to measure the WFS head responsivity.

I made a thru calibration as in
 WFShead_response.pdf 
  14951   Tue Oct 8 16:00:06 2019 aaronUpdateElectronicsWFS head RF measurementsI simulated this
circuit with zero, but haven't gotten
the results to match the measurements above.
 WFS_ACresponse.pdfWFS_DCresponse.pdf 
  14959   Wed Oct 9 12:15:05 2019 ranaUpdateElectronicsWFS head RF measurementsIt would be good if you and Shruti can
look at how to change the parameters in Zero
so as to do a fit to the measured data. Usually,
  
  15230   Thu Feb 27 15:50:37 2020 gautamUpdateElectronicsFSS box power cable removedIn 1X1, there is a box labelled "FSS
REF" below a KEPCO HV supply. This box
had a power cable that wasn't actually
  
  15238   Mon Mar 2 16:29:40 2020 gautamUpdateElectronicsc1psl VME crate removed, Acro-crate installed[JV, JWR, YD, GV]


The old c1psl VME crate,
and all the ribbon cables connected to it
 c1psl.pdf 
  15242   Tue Mar 3 17:20:14 2020 gautamUpdateElectronicsMore cabling removedJordan and I removed another 10 kg of cabling
from 1X2. The c1iool0 crate now has all cabling
to it disconnected - but it remains in the
  
  15243   Tue Mar 3 17:59:33 2020 YehonathanUpdateElectronicsPSL Shutter and PMC TRANSPD workingI used existing BNC cables running from
the PSL table to the PSL rack and reassigned
them to the PSL Shutter and PMC transmission
  
  15249   Wed Mar 4 16:18:31 2020 gautamUpdateElectronicsMore cabling removedAfter discussing with Koji, I removed the
PZT driver and associated AI card from the
Eurocrate at 1X2. The corresponding backplane
 1X2EuroBefore.JPGIOO.png 
  15251   Wed Mar 4 20:42:53 2020 gautamUpdateElectronicsC1PSL acromag crate is sitting on the floorJon is going to write up the details of
todays adventures. But
the C1PSL Acromag chassis is sitting on the
  
  15252   Wed Mar 4 21:02:49 2020 KojiUpdateElectronicsMore cabling removedWe are going to replace the old Sun c1ioo
with a modernized supermicro. At the opportunity,
remove the DAC and BIO cards to use them
  
  15254   Thu Mar 5 11:27:48 2020 gautamUpdateElectronicsC1PSL acromag crate is no longer sitting on the floor[jordan, gautam]

The C1PSL crate has now been installed
  
  15255   Thu Mar 5 15:03:48 2020 YehonathanUpdateElectronicsPSL Shutter and PMC TRANSPD working[Jon, Yehonathan]

Summary

With the Acromag chassis now permanently
  
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