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ID Dateup Author Type Category Subject Text Attachments
  16748   Tue Mar 29 17:35:54 2022 PacoUpdateSUSDamping fix on BS, AS4, PR2, and PR3[Ian, Paco]


We removed the "cheby"
filters from AS4, PR2 and PR3 which had been
  
  16749   Thu Mar 31 18:58:16 2022 Ian MacMillanSummaryBHDPart IIa of BHR upgrade - IR laser alignment on Xarm[Ian, Paco]

We continued to try and lock the
IR laser to the x-arm. Last time we adjusted
  
  16750   Fri Apr 1 14:26:19 2022 Ian MacMillanSummaryPEMParticle counter setup near BS ChamberI mounted the particle counter over the
BS chamber attached to the cable tray as
seen in Attachment 1. The signal cable runs
 IMG_1407.jpg 
  16751   Fri Apr 1 14:26:50 2022 TegaUpdateOptical LeversSimplified sketch on MC tableHere is an early sketch
of the MC table. 

 
 MC_Table.drawio.pdf 
  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,
  
  16754   Sat Apr 2 15:46:13 2022 ranaSummaryPEMParticle counter setup near BS Chambernice - please update the particle counter
page in the 40m wiki. Its probably years
out of date.
  
  16755   Mon Apr 4 15:49:06 2022 TegaUpdateOptical LeversSimplified sketch on BS tableI have updated the BS table using feedback
from Koji and Paco and the attached
pdf document is the latest iteration.
 BS_Table.drawio.pdf 
  16756   Mon Apr 4 17:03:47 2022 AnchalSummaryCDSc1susaux2 slow controls acromag chassis fixed and installed[Anchal, JC, Ian, Paco]

We have now fixed all issues with
the PD mons of c1susaux2 chassis. The slow
 Screenshot_2022-04-04_17-03-26.png 
  16757   Tue Apr 5 18:15:06 2022 AnchalSummaryBHDPart IIa of BHR upgrade - IR laser alignment on Xarm[Paco, Anchal, Ian, JC]

We attempted the alignment of IR
beam into the arm cavities. We used PR2 and
  
  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 
  16759   Wed Apr 6 12:03:51 2022 AnchalSummaryBHDPart IIa of BHR upgrade - IR laser alignment on Yarm[Anchal, Paco]

After Koji reduced the output resistors
on PR2/PR3 coil drivers, we got much better
  
  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 
  16761   Thu Apr 7 11:47:22 2022 YehonathanUpdateBHDInitial BHD modeling: AS - LO mode matching

I begin modeling the initial BHD
  
  16762   Thu Apr 7 17:59:51 2022 AnchalSummaryBHDPart IIa of BHR upgrade - IR laser alignment on Yarm[Anchal, Paco, JC, Tega]

Today we have aligned the Yarm
cavity for IR, with verified 1.5 roundtrips.
  
  16763   Thu Apr 7 20:33:42 2022 TommyUpdateElectronicsRFSoC 2x2 board -- setup for remote workTo access the board remotely through the
40m lab ethernet port, use

ssh -N -L localhost:1137:localhost:9090
  
  16764   Thu Apr 7 20:37:06 2022 TommyUpdateElectronicsRFSoC 2x2 Board -- Simple Tone GeneratorIn the "Tommy" sub folder, I
created a new notebook called "SimpleToneGenerator".
This tunes the DAC and ADC mixers to a single
  
  16765   Thu Apr 7 20:41:15 2022 TommyUpdateElectronicsRFSoC 2x2 Board -- Gain PlotterIn this file (under Tommy), we have a notebook
which runs through a spectrum of frequencies
and determines the gain response of the attached
 Screen_Shot_2022-04-07_at_8.40.23_PM.pngUnknown-3.pngUnknown-4.png 
  16766   Thu Apr 7 21:15:04 2022 YehonathanUpdateBHDInitial BHD modeling: AS - LO mode matchingOk, it turns out these optics were purchased
on purpose, as this elog
shows. Jon considered building a mode-matching
  
  16767   Fri Apr 8 16:03:58 2022 ranaUpdateElectronicsRFSoC 2x2 board -- setup for remote work & BALUN sagaSeems like it should be possible to just
remove the transformer (aka as a BALUN ...
BALanced, UNbalanced), or replace it with
  
  16768   Fri Apr 8 17:21:31 2022 Ian MacMillanSummaryBHDPart IIa of BHR upgrade - IR laser alignment on Yarm[Ian, Paco, Tega]

Paco and I opened the ETMY and
ITMY chamber to work on yesterdays efforts
  
  16769   Mon Apr 11 11:00:30 2022 JancarloUpdateVACC1VAC Reboot and Nitrogen tanks[Paco, JC, Ian, Jordan, Chub]

Checking in the morning, I walked
over to the Nitrogen tanks to check the levels.
  
  16770   Mon Apr 11 21:13:21 2022 PacoSummaryBHDPart IIa of BHR upgrade - POY11 debugging[Paco, Koji]

I asked Koji for some advice regarding
closing the loop on YARM using POY11. A few
  
  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 
  16772   Tue Apr 12 09:05:21 2022 JordanUpdateVACNew Pressure Gauge Install/Pump Spool VentToday, Tega and I would like to vent the
pump spool an dinstall the new FRG-400 Agilent
Pressure Gauges (per elog 15703). The attached
 6x 
  16773   Wed Apr 13 12:50:07 2022 TegaUpdateVACNew Pressure Gauge Install/Pump Spool Vent[Jordan, JC, Tega]

We have installed all the FRGs
and updated the VAC medm screens to display
 VAC_FRG_UPGRADE.png 
  16774   Wed Apr 13 15:57:25 2022 Ian MacMillanUpdateCamerasCamera Battery TestTested the Nikon batteries for the camera.
they are supposed to be 7V batteries but
they don't hold a charge. I confirmed
  
  16775   Wed Apr 13 16:23:54 2022 Ian MacMillanUpdateGeneralSmell in 40m[Ian, Paco, JC]

There is a strange smell in the
40m. It smells like a chemically burning
  
  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.
  
  16777   Thu Apr 14 09:04:30 2022 JordanUpdateVACRGA Volume RGA ScansPrior to venting the RGA volume on Tuesday
(4/12/2022) I took an RGA scan of the volume
to be vented (RGA+TP1 volume+Manual Gate
 40mRGA_Overlay.pdfRGAVolume_4_12_22.PNG 
  16778   Thu Apr 14 10:18:35 2022 PacoSummaryBHD2 in oplev mirrors incompatible with LMR2V[Paco, JC]

We realized the 2 in oplev mirrors
(Thorlabs BB2-E02) for ITMYOL, SRMOL, and
  
  16779   Thu Apr 14 11:52:57 2022 yehonathanSummaryBHDPart IIa of BHR upgrade - POY11 debugging{JC, Paco, Yehonathan, Ian}

POY lens was moved to infront of
the POY steering mirror to make the POU beam
 Screenshot_2022-04-14_15-53-39.pngPXL_20220414_220616875.jpg 
  16780   Thu Apr 14 18:34:51 2022 PacoSummaryBHDITMY Oplev reinstalled (Re: 2 in oplev mirrors incompatible with LMR2V)[Paco, Yehonathan]

We installed ITMYOL1 and ITMYOL2
on the ITMY chamber. We aligned the ITMY
  
  16781   Thu Apr 14 18:39:13 2022 PacoSummaryBHDPart IIa of BHR upgrade - POY11 debugging[Paco]

In reply to Koji's questions;

Q1: What is the product number
  
  16782   Fri Apr 15 11:59:16 2022 YehonathanUpdateIOOIMC completely misalignedCame this morning, opened the PSL and there
was not even a beam on the MC REFL.

Looking at the big monitor it seems
  
  16783   Mon Apr 18 14:52:47 2022 Ian MacMillanSummarySEISeismic Study of Buildings and Caltech Campus[Ian, JC]

I want to take measurements of
seismic noise at different places on Caltech's
 7x 
  16784   Mon Apr 18 15:17:31 2022 JancarloUpdateGeneralTool box and Work Station OrganizationI cleaned up around the 40 m lab. All the
Laser Safety Glasses have been picked up
and placed on the rack at the entrance.
  
  16785   Mon Apr 18 16:09:07 2022 YehonathanUpdateBHDBHD Readout simulationI'm planning on simulating the BHD
readout noise in a manner very similar to
the ALS noise model using Simulink. I've
 BHD_Simulink_Sketch.drawio.pdf 
  16786   Mon Apr 18 17:53:45 2022 PacoSummaryBHDPart IIa of BHR upgrade - POY11 debugging[Paco, Ian]

We aligned the X-arm IR laser


First fix pointing on the
  
  16787   Mon Apr 18 23:22:39 2022 KojiUpdateGeneralTool box and Work Station OrganizationWhoa! Thanks!  PXL_20220419_062101907.jpg 
  16788   Tue Apr 19 18:10:10 2022 PacoUpdateBHDPart V of BHR upgrade - POX11 path, LO path, and ITMX Oplev[Yuta, Paco]

We set up POX11 beam path from
ITMX chamber to the ITMX in-air table. To
 DJI_0167.JPGDJI_0169.JPGDJI_0168.JPG 
  16789   Wed Apr 20 08:20:22 2022 PacoUpdateBHDPart V of BHR upgrade - PR2 weirdnessYesterday, I tried tuning the PR2 damping
gains by increasing the gain until the damping
gave the ~5 oscillations (by watching the
  
  16790   Wed Apr 20 14:56:06 2022 TommyUpdateElectronicsRFSoC 2x2 board -- setup for remote work & BALUN sagaHere are a few options for replacement
BALUNs from Mini Circuits and specs:

Current. TCM1-83X+, 10-8000 MHz,
  
  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. 
  
  16794   Thu Apr 21 11:31:35 2022 JCUpdateVACGauges P3/P4[Jordan, JC]

It was brought to attention during
yesterday's meeting that the pressures
 IMG_0560.jpegIMG_0561.jpeg 
  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
  
  16796   Thu Apr 21 16:36:56 2022 TegaUpdateVACcleanup work for vacuum git repogit repo - https://git.ligo.org/40m/vac

Finally incorporated the FRGs into
the main modbusIOC service and everything
  
  16797   Thu Apr 21 16:49:01 2022 PacoUpdateBHDPart V of BHR upgrade - BS Oplev + LO1 offset[Paco, JC, Yuta]

We aligned the BS oplev using the
new BSOL mirror pair. The main change is
  
ELOG V3.1.3-