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  40m Log, Page 119 of 335  Not logged in ELOG logo
ID Date Authorup Type Category Subject Text Attachments
  16673   Tue Feb 15 19:40:02 2022 KojiUpdateGeneralIMC lockingIMC
is locking now. There was
nothing wrong: just a careful alignment +
  
  16684   Sat Feb 26 23:48:14 2022 KojiUpdateSUSETMY SUS Electronics Replacement[Ian, Koji] - Activity
on 25th (Fri)

We continued working on
 PXL_20220226_023111179_2.jpg 
  16685   Sun Feb 27 00:37:00 2022 KojiUpdateGeneralIMC Locking RecoverySummary:

- IMC was locked.
- Some alignment change in the output
 PXL_20220226_093809056.jpgPXL_20220226_093854857.jpgPXL_20220226_100859871.jpgScreenshot_2022-02-26_01-56-31.pngScreenshot_2022-02-26_01-56-47.png 
  16686   Sun Feb 27 01:12:46 2022 KojiUpdateGeneralIMC manual alignment procedureWe expect that the MC sus are susceptible
to the temperature change and the alignment
drifts away with time.
 PXL_20220226_100859871.jpg 
  16690   Tue Mar 1 19:26:24 2022 KojiUpdateSUSETMY SUS Electronics ReplacementThe replacement key switches and Ne Indicators
came in. They were replaced and work fine
now.
 PXL_20220302_025723651.jpgPXL_20220302_030102033.MP.jpg 
  16695   Thu Mar 3 04:11:36 2022 KojiUpdateSUSETMY 1Y4 Electronics ReplacementFor the Y-end electronics replacement,
we want to remove unused power supplies.
In fact, we already removed the +/-5V supplies
 PXL_20220303_082726693.jpgPXL_20220303_082752494.jpgPXL_20220303_082744464.jpg 
  16696   Thu Mar 3 04:24:23 2022 KojiUpdateSUSETMY 1Y4 Electronics ReplacementThe DC power strip at Y-end was connected
to the bottom two Sorensen power supplies.
They are configured to provide +/-18V.
 PXL_20220303_094421604.jpgPXL_20220303_094435127.jpg 
  16701   Fri Mar 4 18:12:44 2022 KojiUpdateVACRGA pumping down1. Jordan reported that the newly installed
Pirani gauge for P2 shows 850Torr while PTP2
show 680 Torr. Because of this, the vacuum
 Screenshot_2022-03-04_19-38-11.png 
  16702   Sat Mar 5 01:58:49 2022 KojiSummaryCDSpaola rescueETMY end ThinkPad "paola" could
not reboot due to "Fan Error".
It seems that it is the failure of the CPU
 PXL_20220305_035255834.jpgPXL_20220305_034649120.MP.jpg 
  16703   Sat Mar 5 02:03:46 2022 KojiUpdateSUSETMY 1Y4 Electronics ReplacementOplev saga

Summary 

- The new coil driver had not enough
 6x 
  16707   Mon Mar 7 14:52:34 2022 KojiUpdateVACOngoing work to get the FRG gauges readouts to EPICs channelsGreat trouble shoot!

> I guess, the only remaining
issue now is the incorrect atmospheric
  
  16708   Mon Mar 7 14:55:33 2022 KojiUpdateIOOIMC unlocked again, completely misalignedHmm, the bias values were reset at 2022-03-03-20:01UTC
which is 2022-03-03-12:01 PST with no apparent
disruption of the data acquisition (= no
  
  16711   Mon Mar 7 18:53:16 2022 KojiUpdateBHDRe-susspension of AS1Not sure if that small difference can cause
the alignment inability. Particularly, the
removed metal was just below the wire. This
  
  16719   Wed Mar 9 12:57:52 2022 KojiUpdateBHDSimplified BHD readout sketch on ITMY table- BHD beams were already mixed in the chamber.
So we don't need a BS on the table. (Probably
there is no BS already)
  
  16752   Fri Apr 1 17:02:02 2022 KojiUpdateOptical LeversSimplified sketch on MC tableWe are supposed to have BS Oplev Beams.
We don't like the shallow angle reflections
(i.e. AOI>45deg).
  
  16753   Fri Apr 1 22:22:29 2022 KojiUpdateOptical LeversSimplified sketch on MC tablePossibility to swap BS and ITMX
tables:
BS table, which Tega said MC table,
  
  16758   Wed Apr 6 01:20:48 2022 KojiSummaryBHDPart IIa of BHR upgrade - IR laser alignment on XarmPR2/PR3 Output R for fame OSEMS reduced
from 1.2K to 1.2K//100Ohm

I
 PXL_20220406_060846581.jpgPXL_20220406_014205726.jpgPXL_20220406_060324812.jpgPXL_20220406_015259326.jpg 
  16760   Wed Apr 6 22:51:47 2022 KojiSummaryBHDPart IIa of BHR upgrade - IR laser alignment on Xarm[Yuta Koji]

We took out the two coil driver
units for PR3 and the incorrect arrangement
 PXL_20220406_213356237.MP.jpgPXL_20220406_212936502.MP.jpg 
  16771   Mon Apr 11 21:44:14 2022 KojiSummaryBHDPart IIa of BHR upgrade - POY11 debuggingWe took out the right most PD interface
board D990543 and removed the 74LS04 chips.
In fact two out of 4 were already replaced
 D990543A1.PDFPXL_20220412_023941730.jpgPXL_20220412_023950567.jpg 
  16776   Wed Apr 13 18:55:54 2022 KojiUpdateCamerasCamera Battery TestI believe that the Nikon has an exposure
problem and that's why we bought the
Canon.
  
  16787   Mon Apr 18 23:22:39 2022 KojiUpdateGeneralTool box and Work Station OrganizationWhoa! Thanks!  PXL_20220419_062101907.jpg 
  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 
  16792   Wed Apr 20 18:50:03 2022 KojiUpdateBHDPart V of BHR upgrade - PR2 weirdnessIt seemed that it comes from the servo
oscillation. This does not happen when the
output limitters were set to be 100-ish.
 Screenshot_2022-04-20_18-46-11.png 
  16793   Thu Apr 21 10:35:23 2022 KojiUpdateCDSDAQ seemed downYesterday, when I worked on the damping
servo, I found that any of the daqvtools
(ndscope, dtt, dataviewer,...) is not available. 
  
  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
  
  16801   Thu Apr 21 20:33:31 2022 KojiUpdateBHDAS1 UR OSEM problem localized in the chamberTega and Paco reported that the UR OSEM
of AS1 lost the response.

- I have checked the LED MON (left)
 Screenshot_from_2022-04-21_20-13-13.png 
  16809   Mon Apr 25 14:49:02 2022 KojiUpdateGeneralNitrogen TankFor your (and mine) info:

N2 pressure can be monitored on
the 40m summary page: https://nodus.ligo.caltech.edu:30889/detcharsummary/day/20220425/vacuum/
  
  16839   Mon May 9 22:19:06 2022 KojiUpdateBHDBHD Platform Progress status[Don, Koji]

Don is working on finalizing the
BHD Platform design. All the components on
 Screenshot_2022-05-09_220220.pngScreenshot_2022-05-09_222405.png 
  16840   Mon May 9 23:18:44 2022 KojiUpdateBHDBHD Platform Progress statusI quickly ran the FEA model to check the
resonant freqs of the BHD platform.
The boundary conditions were:
 6x 
  13941   Mon Jun 11 18:10:51 2018 Koji UpdateelogComparison of the analytical and finesse values of TMS and FSR.Hmm? What is the definition of the percentage
error? I don't obtain these numbers from
the given values.
  
  2613   Thu Feb 18 15:39:16 2010 Koji and SteveConfigurationVACvalve condition: ALL OFFAs preparation for the upcoming planned
power outage we turned turbos, RGA off and
closed valves.
  
  7736   Wed Nov 21 01:31:37 2012 Koji, AyakaUpdateLockingalignment on ETMX tableSince the transmission beam on ETMXT camera
seemed to be clipped, we checked the optics
on ETMX table.
 output.nv12.bmp 
  2259   Thu Nov 12 17:24:29 2009 Koji, Joe, PeterConfigurationCDSETMY CDS test startedWe started the test of the new CDS system
at ETMY.
The plan is as follows:
  
  3054   Tue Jun 8 00:38:22 2010 Koji, KiwamuUpdateIOOimproved Gaussian beam in new IOOThe shape
of the beam spot in the new input optics
 2010-6-7_2.png 
  2915   Wed May 12 02:35:13 2010 Koji, Rana, KiwamuUpdateGreen LockingReflection from ETM and ITM !We succeeded in getting
the reflected green beam from both ITMY and
  
  2290   Wed Nov 18 11:27:33 2009 Koji, josephbConfigurationSUSETMY suspension conencted to megatron ADC/DAC

    
        
  
  2291   Wed Nov 18 12:33:30 2009 Koji, josephbConfigurationSUSETMY suspension conencted to megatron ADC/DACHurraaaah!
We've got the damping of the suspension.
The Oplev loops has also worked!
The
 Untitled.png 
  12640   Wed Nov 23 20:08:51 2016 Koji, ranaUpdateIOOMC WFS Demod/Whitening boards removed from the IOO rackWe removed one set of the MC WFS
demod board and whitening board from the
IOO rack for the investigation.
  
  10162   Wed Jul 9 11:41:12 2014 KoushikUpdatePSLPMC local oscillator is going wonky

    

       
            
  
  14621   Sat May 18 12:19:36 2019 KruthiUpdate CCD calibration and telescope designI went through all the elog entries related
to CCD calibration. I was wondering
if we can use Spectralon diffuse
 6x 
  14633   Thu May 23 10:18:39 2019 KruthiUpdateCamerasCCD calibrationOn Tuesday, I tried reproducing Pooja's
measurements (https://nodus.ligo.caltech.edu:8081/40m/13986).
The table below shows the values I got.
 setup.jpegled_circuit.jpegled_schematic.pdfLED_plot.png 
  14639   Sun May 26 21:47:07 2019 KruthiUpdateCamerasCCD Calibration 

On Friday, I tried calibrating
the CCD with the following setup. Here, I
 CCD_calibration_setup.png 
  14644   Fri May 31 01:38:21 2019 KruthiUpdateCamerasTelescope[Kruthi, Milind]

Yesterday, we were able to
capture some images of objects at a
 telescope_mug_image.pdf 
  14651   Tue Jun 4 00:11:45 2019 KruthiUpdateCamerasGigE setupChub and I are trying to figure out a way
to co-mount GigE into the existing cylindrical
enclosure. I'm attaching a picture of
 MC2.pdfSetup_3.pngSetup_1.pngSetup_2.png 
  14660   Sun Jun 9 21:24:00 2019 KruthiUpdateCamerasGigE setupI managed to fit all the parts into the
cylindrical enclosure without having to drill
a hole in the enclosure to mount the analog
 GigE_setup.jpgGigE_setup_top_view.jpg 
  14663   Tue Jun 11 00:25:05 2019 KruthiUpdateCamerasGigE setup[Kruthi, Milind]

Today, with Milind's help,
I installed the analog camera into the MC2
 MC2_analog_setup.jpgtelescope.pdf 
  14665   Wed Jun 12 02:15:50 2019 KruthiUpdateCamerasGigE setup[Koji, Kruthi]

Yesterday, Koji helped me clean
all the optics that are being used for the
 MC2_GigE_setup.jpg 
  14666   Wed Jun 12 21:55:34 2019 KruthiUpdateCamerasGigE setupI'm attaching a picture of the screen.
I just positioned the enclosure by turning
it a bit and I suppose we can see the
 MC2_analog_pic.jpg 
  14674   Fri Jun 14 00:40:33 2019 KruthiUpdateCamerasGigE setupToday, I tried aligning it further; I'm
attaching a picture of it. We are not able
to see all the 4 OSEMs yet. In the reference
 Reference_image_taken_with_previous_analog_camera_setup.jpegMC2_image.JPG 
  14676   Sat Jun 15 00:03:26 2019 KruthiUpdateCamerasGigE setupThe analog camera is aligned and we are
able to see all the 4 OSEMs (pictures attached).
Due to secondary reflection from the
 mc2_GigE.pdfMC2_analog.jpegMC2_analog_OSEMs.jpeg 
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