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New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Typeup Category Subject Text Attachments
  16585   Fri Jan 14 11:00:29 2022 AnchalUpdateBHDPR2 transmission calculationYeah, I counted the loss from arm cavities
as the transmission from ETMs on each bounce.
I assumed Michelson to be perfectly aligned
  
  16586   Fri Jan 14 12:01:21 2022 AnchalUpdateElectronicsBS & ITMY feedthroughs labeled and connected to Sat AmpsI labeled all the newly installed flanges
and connected the in-air cables (40m/16530)
to appropriate ports. These cables are connected
  
  16587   Fri Jan 14 13:46:25 2022 AnchalUpdateBHDPR2 transmission calculation updatedI updated the arm cavity roundtrip losses
due to scattering. Yehonathan told me that
arm cavity looses 50ppm every roundtrip other
 LO_power_vs_PR2_transmission.pdfPRC_Gain_vs_PR2_transmission.pdfPR2_Trans_Calc.ipynb.zip 
  16588   Fri Jan 14 14:04:51 2022 PacoUpdateElectronicsRFSoC 2x2 board arrivedThe Xilinx RFSoC 2x2 board arrived right
before the winter break, so this is kind
of an overdue elog. I unboxed it, it came
 PXL_20220114_211249499.jpg 
  16589   Fri Jan 14 17:33:10 2022 YehonathanUpdateBHDAS4 resurrection{Yehonathan, Anchal}

Came this morning, the gluing of
the magnets was 100% successful. Side blocks,
 AS4_roll_balance2.pngAS4_magnet_height2.pngFreeSwingingSpectra.pdf 
  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
  
  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/
  
  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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