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New entries since:Wed Dec 31 16:00:00 1969
IDup Date Author Type Category Subject Text Attachments
  16595   Wed Jan 19 12:50:10 2022 AnchalSummaryBHDPart IV of BHR upgrade - SR2 OSEM tuning progress.It was indeed the issue of the top OSEM
plate not being in the right place horizontally.
But the issue was more non-trivial. I believe
  
  16596   Wed Jan 19 12:56:52 2022 PacoSummaryBHDAS4 OSEMs installation[Paco, Tega, Anchal]

Today, we started work on AS4 SOS
by checking the OSEM and cable. Swapping
  
  16597   Wed Jan 19 14:41:23 2022 KojiUpdateBHDSuspension StatusIs this the correct status? Please
directly update this entry.


  
  16598   Wed Jan 19 16:22:48 2022 AnchalUpdateBHDPR2 transmission calculation updatedI have further updated my calculation.
Please find the results in the attached pdf.

Following is the description of
 PR2transmissionSelectionAnalysis.pdfPR2_Trans_Calc.ipynb.zip 
  16599   Wed Jan 19 18:15:34 2022 YehonathanUpdateBHDAS1 resurrectionToday I suspended AS1. Anchal helped me
with the initial hanging of the optics. Attachments
1,2 show the roll balance and side magnet
 AS1_roll_balance2.pngAS1_magnet_heigh2.pngFreeSwingingSpectra.pdfIMG_6324.JPG 
  16600   Wed Jan 19 21:39:22 2022 TegaUpdateSUSTemporary watchdogAfter some work on the reference database
file, we now have a template for temporary
watchdog implementation for LO1 located here
  
  16601   Thu Jan 20 00:26:50 2022 KojiUpdateSUSTemporary watchdogAs the new db is made for c1susaux, 1)
it needs to be configured to be read by c1susaux
2) it requires restarting c1susaux 3) it
  
  16602   Thu Jan 20 01:48:02 2022 KojiUpdateBHDPR2 transmission calculation updatedIMC is not such lossy. IMC output is supposed
to be ~1W.

The critical coupling condition
  
  16603   Thu Jan 20 12:10:51 2022 YehonathanUpdateBHDAS1 resurrectionI was wondering whether I should take AS1
down to redo the wire clamping on the side
blocks. I decided to take the OpLev spectrum
 FreeSwingingSpectra.pdfFreeSwingingSpectra_div_20mV.pdfFreeSwingingSpectra_div_50mV.pdf 
  16604   Thu Jan 20 16:42:55 2022 PacoUpdateBHDAS4 OSEMs installation - part 2[Paco]

Turns out, the shifting was likely
due to the table level. Because I didn't
  
  16605   Thu Jan 20 17:03:36 2022 AnchalSummaryBHDPart IV of BHR upgrade - SR2 OSEM tuned.The main issue with SR2 OSEMs, now that
I think of it, was that the BS table was
very inclined due to the multiple things
 DJI_0144.JPG 
  16606   Thu Jan 20 17:21:21 2022 TegaUpdateSUSTemporary watchdogTemp software watchdog now operational
for LO1 and the remaining optics!

Koji helped me understand how to
  
  16607   Thu Jan 20 17:34:07 2022 KojiUpdateBHDV6-704/705 Mirror now @DownsThe PR2 candidate V6-704/705 mirrors (Qty2)
are now @Downs. Camille picked them up for
the measurements.
 PXL_20220120_225248265_2.jpgPXL_20220120_225309361_2.jpg 
  16608   Thu Jan 20 18:16:29 2022 AnchalUpdateBHDAS4 set to trigger free swing testAS4 is set to go through a free swinging
test at 10 pm tonight. We have used this
script (Git/40m/scripts/SUS/InMatCalc/
  
  16609   Thu Jan 20 18:41:55 2022 AnchalSummaryBHDSR2 set to trigger free swing testSR2 is set to go through a free swinging
test at 3 am tonight. We have used this script
(Git/40m/scripts/SUS/InMatCalc/freeSwing.py)
  
  16610   Fri Jan 21 11:24:42 2022 AnchalSummaryBHDSR2 Input Matrix Diagonalization performed. The free swinging test
was successful. I ran the input matrix diagonalization
code (
 SR2_SUS_InpMat_Diagnolization_20220121.pdfSR2_FreeSwingData_PeakFitting_20220121.pdf 
  16611   Fri Jan 21 12:46:31 2022 TegaUpdateCDSSUS screen debuggingAll done (almost)! I still have not sorted
the issue of pitch and yaw gains growing
together when modified using ramping time.
 Custom_ADC_DAC_monitors.png 
  16612   Fri Jan 21 14:51:00 2022 KojiUpdateBHDV6-704/705 Mirror now @DownsCamille@Downs measured the surface of these
M1 and M2 using Zygo.
 M1.PNGM1_30mm.PNGM2.PNGM2_30mm.PNG 
  16613   Fri Jan 21 16:40:10 2022 AnchalUpdateBHDAS4 Input Matrix Diagonalization performed. The free swinging test was successful.
I ran the input matrix diagonalization code
(/opt/rtcds/caltech/c1/Git/40m/scripts/SUS/InMAtCalc/sus_diagonalization.py)
 AS4_SUS_InpMat_Diagnolization_20220121.pdfAS4_FreeSwingData_PeakFitting_20220121.pdf 
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