40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 151 of 344  Not logged in ELOG logo
ID Date Author Type Categoryup Subject Text Attachments
  16921   Wed Jun 15 17:12:39 2022 CiciSummaryGeneralPreparation for AUX Loop Characterization[Deeksha, Cici]

We went to the end Xarm station
and looked at the green laser setup and electronics.
  
  16926   Thu Jun 16 19:49:48 2022 CiciUpdateGeneralUsing the SR785[Deeksha, Cici]

We used a python script to collect
data from the SR785 remotely. The SR785 is
  
  16933   Tue Jun 21 14:59:22 2022 CiciSummaryGeneralAUX Transfer Function Loop Exploration[Deeksha, Cici]

We learned about the auxillary
laser control loop, and then went into the
  
  16944   Fri Jun 24 13:29:37 2022 YehonathanUpdateGeneralOSEMs from KAGRAThe box was given to Juan Gamez (SURF)




  
  16950   Mon Jun 27 13:25:50 2022 CiciUpdateGeneralCharacterizing the Transfer Loop[Deeksha, Cici]

We first took data of a simple
low pass filter, and attempted to perform
 TF_measurement_b.pngtransfer_function_mag_fit.pngtransfer_function_phase_fit.pngcontrol_flow.png 
  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
  
  16955   Tue Jun 28 16:26:58 2022 CiciSummaryGeneralVector fitting open loop transfer function/Audio cancellation of optical table enclosure[Deeksha, Cici]

We attempted to use vectfit to
fit our earlier transfer function data, and
 vectfit_firstattempt.pngTFSR785_28-06-2022_161937.pdfenclosure_open.MP4enclosure_closed.MP4 
  16982   Fri Jul 8 23:10:04 2022 KojiSummaryGeneralJuly 9th, 2022 Power Outage Prep The 40m team worked on the power outage
preparation. The detailed is summarized on
this wiki page. We will still be able to
  
  16988   Mon Jul 11 19:29:23 2022 PacoSummaryGeneralFinalizing recovery -- timing issues, cds, MC1[Yuta, Koji, Paco]

Restarting
CDS

We were having
  
  16993   Tue Jul 12 18:35:31 2022 Cici HannaSummaryGeneralFinding Zeros/Poles With VectfitAm still working on using vectfit to find
my zeros/poles of a transfer function - now
have a more specific project in mind, which
  
  17003   Thu Jul 14 19:09:51 2022 ranaUpdateGeneralEQ recoveryThere was a EQ in Ridgecrest (approximately
200 km north of Caltech). It was around 6:20
PM local time.
 ETMY-screen.png 
  17006   Fri Jul 15 16:20:16 2022 Cici HannaUpdateGeneralFinding UGFI have temporarily abandoned vectfit and
aaa since I've been pretty unsuccessful
with them and I don't need poles/zeroes
 UGF_4042.pngUGF_5650.pngTFSR785_29-06-2022_114042.txtTFSR785_29-06-2022_115650.txt 
  17021   Wed Jul 20 11:58:45 2022 PacoSummaryGeneralJenne laser kaput?[Paco, Yehonathan, JC]

We were trying to setup the Jenne
laser to characterize the response of three
  
  17022   Wed Jul 20 14:12:07 2022 PacoSummaryGeneralJenne laser kaput![Koji, Yehonathan, Paco]

Koji pointed out that this laser
was always driven with a current driver (which
  
  17023   Wed Jul 20 15:58:52 2022 KojiSummaryGeneralJenne laser kaput!For troubleshooting, the proper laser driver
(found beneath the AG network analyzer) was
connected.
  
  17027   Fri Jul 22 17:43:19 2022 KojiUpdateGeneralObtained a functional CRT[Koji Paco]

Koji went to Downs and found a
CRT labeled "for 40m Rana?". So
 PXL_20220723_003631871.jpg 
  17030   Mon Jul 25 09:05:50 2022 PacoSummaryGeneralTesting 950nm laser found in trash pile[Paco, Yehonathan]

==== Late elog from Friday ====

Koji provided us with a QFLD-950-3S
 PXL_20220722_234600124.jpgPXL_20220722_234551918.jpg 
  17051   Mon Aug 1 17:19:39 2022 CiciSummaryGeneralRPitaya Data on Jupyter NotebookHave successfully plotted data from the
Red Pitaya on Jupyter Notebook! Have
lost years of my life fighting with PyQt.
  
  17055   Wed Aug 3 15:01:13 2022 KojiUpdateGeneralBorrowed Dsub cables Borrowed DSUB cables for
Juan's SURF project
 PXL_20220803_215819580.jpg 
  17064   Fri Aug 5 17:03:31 2022 YehonathanSummaryGeneralTesting 950nm laser found in trash pileI set out to test the actuation bandwidth
of the 950nm laser. I hooked the laser to
the output of the bias tee of PD testing
 20220805_164434.jpgLaserActuation_TF_Measurement.drawio.pdf 
  17070   Wed Aug 10 15:33:59 2022 CiciUpdateGeneralWorking Red Pitaya VNATL;DR: I am now able to inject a swept
sine and measure a transfer function with
python on my Red Pitaya! Attached is
 rpi_vna_test.pdf 
  17071   Wed Aug 10 19:24:19 2022 ranaUpdateGeneralWorking Red Pitaya VNA                
Boom!
  
  17072   Wed Aug 10 19:36:45 2022 KojiBureaucracyGeneralLab cleaning and discoveryDuring the cleaning today, we found many
legacy lab items. Here are some policies
what should be kept / what should be disposed
 steel_plate.jpglogbook1.jpglogbook2.jpgpaper_plots.jpg 
  17076   Thu Aug 11 17:15:33 2022 CiciUpdateGeneralMeasuring AUX Laser UGF with Red PitayaTL;DR: Have successfully measured the UGF
of the AUX laser on my Red Pitaya! Attached
is one of my data runs (pdf + txt file). 
 rpi_OLG_2022_08_11_16_51_53.pdfrpi_OLG_2022_08_11_16_51_53.txt 
  17077   Fri Aug 12 02:02:31 2022 KojiUpdateGeneralPower Outage Prep: nodus /home/export backupTook the backup (snapshot) of /home/export
as of Aug 12, 2022

controls@nodus>
  
  17078   Fri Aug 12 13:40:36 2022 JCUpdateGeneralPreparing for Shutdown on Saturday, Aug 13[Yehonathan, JC]

Our first step in preparing for
the Shutdown was to center all the OpLevs.
  
  17079   Mon Aug 15 10:27:56 2022 KojiUpdateGeneralRecap of the additional measures for the outage prep[Yuta Koji]

(Report on Aug 12, 2022)

We went around the lab
 PXL_20220812_234438097.jpgPXL_20220812_234655309.jpgPXL_20220812_234748559.jpgrn_image_picker_lib_temp_b5f3e38d-796c-4816-bc0e-b11ba3316cbe.jpgPXL_20220812_235429314.jpg 
  17080   Mon Aug 15 15:43:49 2022 AnchalUpdateGeneralComplete power shutdown and startup documentationAll steps taken have been recorded here:
https://wiki-40m.ligo.caltech.edu/Complete_power_shutdown_2022_08
  
  17081   Mon Aug 15 18:06:07 2022 AnchalUpdateGeneralc1vac issues, 1 pressure gauge died[Anchal, Paco, Tega]


Disk full issue:

c1vac
was showing /var disk to be full. We moved
  
  17082   Mon Aug 15 20:09:18 2022 KojiUpdateGeneralc1vac issues, 1 pressure gauge died- Disk Full: Just use the usual /etc/logrotate
thing

- Vacuum gauge
  
  17084   Wed Aug 17 01:18:54 2022 KojiUpdateGeneralNotice: SURF SUS test setup blocking the lab wayJuan and I built an analog setup to measure
some transfer functions of the MOS suspension.
The setup is blocking the lab way around
 PXL_20220817_060428109.jpg 
  17085   Wed Aug 17 07:35:48 2022 yutaBureaucracyGeneralMy wish list for IFO commissioningFPMI related
- Better suspension damping
HIGH
  
  17086   Wed Aug 17 10:23:05 2022 TegaUpdateGeneralc1vac issues, pressure gauge replacement- Disk full

I updated the configuration file
'/etc/logrotate.d/rsyslog' to set
  
  17087   Wed Aug 17 10:27:49 2022 CiciUpdateGeneralLocking X-arm AUX laserTL;DR: Got the x-arm aux laser locked again
and took more data - my fit on my transfer
functions need improvement and my new method
 rpi_OLG_2022_08_16_17_00_41.pdfrpi_OLG_2022_08_16_17_01_21.pdf 
  17090   Thu Aug 18 16:35:29 2022 CiciUpdateGeneralUGF linked to optical gain!TL;DR: When the laser has good lock, the
OLTF moves up and the UGF moves over!

-----------------------------------------------------------
 rpi_OLG_2022_08_17_18_03_52.pdfrpi_OLG_2022_08_17_18_00_50.pdf 
  17093   Fri Aug 19 15:20:14 2022 KojiUpdateGeneralNotice: SURF SUS test setup blocking the lab wayThe setup was (at least partially) cleared.  PXL_20220819_201318044.jpg 
  17095   Fri Aug 19 15:36:10 2022 KojiUpdateGeneralSR785 C21593 CHA+ BNC brokenWhen Juan and I were working on the suspension
measurement, I found that CHA didn't
settle down well.
 PXL_20220819_195619620.jpgPXL_20220819_195643478.jpg 
  17101   Wed Aug 24 10:49:43 2022 CiciUpdateGeneralMeasuring DFD output/X-arm laser PZT TF with MokuWe measured the TF of the X-arm laser PZT
using the Moku so we can begin fitting to
that data and hopefully creating a digital
 AUX_PZT_Actuator_nofit.pdf 
  17103   Wed Aug 24 16:37:52 2022 CiciUpdateGeneralMore DFD/AUX PZT resonance measurements Some more measurements of the PZT resonances
(now zoomed in!) I'm adjusting parameters
on our model to try and fit to it by hand
 AUX_PZT_Actuator_narrow_fit.pdf 
  17106   Thu Aug 25 16:39:31 2022 CiciUpdateGeneralI have learned the absolute basics of githubI have now added code/data to my github
repository. (it's the little victories)
  
  17107   Fri Aug 26 12:46:07 2022 CiciUpdateGeneralProgress on fitting PZT resonancesHere is an update of how fitting the resonances
is going - I've been modifying parameters
by hand and seeing the effect on the fit.
 PZT_fit.zipAUX_PZT_Actuator_narrow_fit_1.pdf 
  17110   Mon Aug 29 13:33:09 2022 JCUpdateGeneralLab CleanupThe machine shop looked a mess this morning,
so I cleaned it up. All power tools
are now placed in the drawers in the
 EDE63209-D556-41F1-9BF2-89CD78E3D7B7.jpeg 
  17112   Mon Aug 29 18:25:12 2022 CiciUpdateGeneralTaking finer measurements of the actuator transfer functionTook finer measurements of the x-arm aux
laser actuator tranfer function (10 kHz -
1 MHz, 1024 pts/decade) using the Moku.
 PZT_TF_fine.pngPZT_TF_fine_mag_stdev.pngATF_fine.zip 
  17114   Wed Aug 31 00:32:00 2022 KojiUpdateGeneralSOS and other stuff in the clean roomSalvage these (and any other things).
Wrap and double-pack nicely. Put the labels.
Store them and record the location. Tell
 6x 
  17115   Wed Aug 31 00:46:56 2022 KojiUpdateGeneralVertex Lab area to be cleanedAs marked up in the photos.

 

Attachment 5: The
 9x 
  17116   Wed Aug 31 01:22:01 2022 KojiUpdateGeneralAlong the X arm part 1 

Attachment 5:
RF delay line was accommodated in 1X3B. (KA)
 9x 
  17117   Wed Aug 31 01:24:48 2022 KojiUpdateGeneralAlong the X arm part 2 

 
 9x 
  17118   Wed Aug 31 01:25:37 2022 KojiUpdateGeneralAlong the X arm part 3 

 
 9x 
  17119   Wed Aug 31 01:30:53 2022 KojiUpdateGeneralAlong the X arm part 4Behind the X arm tube  PXL_20220831_020757504.jpgPXL_20220831_020825338.jpgPXL_20220831_020856676.jpgPXL_20220831_020934968.jpgPXL_20220831_021030215.jpg 
  17120   Wed Aug 31 01:53:39 2022 KojiUpdateGeneralAlong the Y arm part 1 

 
 9x 
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