40m QIL Cryo_Lab CTN SUS_Lab CAML OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m elog, Page 4 of 357  Not logged in ELOG logo
ID Date Author Type Categoryup Subject Text Attachments
  14278   Tue Nov 6 19:41:46 2018 JonOmnistructure c1vac1/2 replacementThis afternoon I started setting up the
Supermicro 5017A-EP that will replace c1vac1/2.
Following Johannes's procedure in 
  
  14282   Wed Nov 7 19:17:18 2018 JonOmnistructure modbusIOC is running on c1vac replacementToday I finished setting up the server
that will replace the c1vac1/2 machines.
I put it on the martian network at the unassigned
  
  14287   Fri Nov 9 22:24:22 2018 JonOmnistructure Wiring of Vacuum Acromag Chassis CompleteWiring of the power, Ethernet, and indicator
lights for the vacuum Acromag chassis is
complete. Even though this crate will only
 IMG_2987.jpgIMG_2985.jpgIMG_2986.jpg 
  14296   Wed Nov 14 21:34:44 2018 JonOmnistructure Vacuum Acromags installed and testedAll 7 Acromag units are now installed in
the vacuum chassis. They are connected to
24V DC power and Ethernet.
 IMG_3003.jpg 
  14308   Mon Nov 19 22:45:23 2018 JonOmnistructure Vacuum System SubnetworkI've set up a closed subnetwork for
interfacing the vacuum hardware (Acromags
and serial devices) with the new controls
  
  14309   Mon Nov 19 23:38:41 2018 JonOmnistructure Vacuum Acromag Channel AssignmentsI've completed bench testing of all
seven vacuum Acromags installed in a custom
rackmount chassis. The system contains
 Binary_IO_Channel_Assignments.pdf 
  14315   Sun Nov 25 17:41:43 2018 JonOmnistructure Vacuum Controls Upgrade - Status and PlansNew hardware has been installed in the
vacuum controls rack. It is shown in the
below post-install photo.
 rack_photo.jpg 
  14320   Mon Nov 26 21:58:08 2018 JonOmnistructure Serial Vacuum SignalsAll the serial vacuum signals are now interfaced
to the new digital controls system. A set
of persistent Python scripts will query each
 GP307_relays.jpeg 
  14420   Tue Jan 29 16:12:21 2019 ChubUpdate  The foam in the cable tray wall passage
had been falling on the floor in little bite-sized
pieces, so I investigated and found a fiber
  
  14435   Tue Feb 5 10:22:03 2019 chubUpdate oil added to RP-1 & 3I added lubricating oil to roughing pumps
RP1 and RP3 yesterday and this morning. 
Also, I found a nearly full 5 gallon jug
  
  14437   Wed Feb 6 10:07:23 2019 ChubUpdate pre-construction inspectionThe Central Plant building will be undergoing
seismic upgrades in the near future. 
The adjoining north wall along the Y arm
  
  14476   Fri Mar 8 08:40:26 2019 AnjaliConfiguration Frequency stabilization of 1 micron sourceThe schematic of the homodyne configuration
is shown below.

Following are the list of components
 Homodyne_setup.png 
  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 
  14626   Mon May 20 21:45:20 2019 MilindUpdate Traditional cv for beam spot motionWent through all of Pooja's elog posts,
her report and am currently cleaning up her
code and working on setting up the simulations
  
  14782   Fri Jul 19 22:48:08 2019 KruthiUpdate Dataviewer errorI'm not able to get trends of
the TM adjustment test that Rana had
asked us to perform, from the dataviewer.
  
  14783   Sat Jul 20 01:03:37 2019 gautamUpdate Dataviewer errorWhat channels are you trying to read?




  
  14869   Tue Sep 10 16:10:40 2019 ChubUpdate Rack UpdateStill removing old cable, terminal blocks
and hardware.  Once new strain reliefs
and cable guides are in place, I will need
 20190910_154018.jpg20190910_154006.jpg 
  15225   Wed Feb 26 17:17:17 2020 YehonathanUpdate Arms DC loss measurements{Yehonathan, Gautam}

In order to measure the loss in
the arm cavities in reflection, we use the
 6x 
  15729   Thu Dec 10 17:12:43 2020 JonUpdate New SMA cables on orderAs requested, I placed an order for an
assortment of new RF cables: SMA male-male,
RG405.
  
  15739   Sat Dec 19 00:25:20 2020 JonUpdate New SMA cables on orderI re-ordered the below cables, this
time going with flexible, double-shielded
RG316-DS.
  
  15740   Sat Dec 19 02:42:56 2020 KojiUpdate New SMA cables on orderOur favorite (flexible) RF cable is Belden's
1671J (Jacketed solder-soaked coax cable).
It is compatible RG405. I'm not sure
  
  16308   Thu Sep 2 19:28:02 2021 KojiUpdate This week's FB1 GPS Timing Issue SolvedAfter the disk system trouble, we could
not make the RTS running at the nominal state.
A part of the troubleshoot FB1 was rebooted.
  
  16339   Thu Sep 16 14:08:14 2021 Ian MacMillanFrogs TourI gave some of the data analysts a look
around because they asked and nothing was
currently going on in the 40m. Nothing was
  
  16812   Mon Apr 25 18:00:03 2022 Ian MacMillanUpdate Cable supports updateI have designed new cable supports for
the new ribbon cables running up the side
of the tables in the vacuum chambers. This
 Chamber_Leg_Ribbon_Cable_Attachments.pdf 
  17418   Wed Jan 25 10:02:47 2023 yehonathanUpdate Earthquake, MC3 watchdog trippedWe came this morning and noticed the FSS_FAST
channel was moving very rapidly. Short inspection
showed that MC3 watchdog got tripped. After
  
  17595   Fri May 19 09:23:58 2023 PacoUpdate MCF Noise The fan behind the
PSL controller is injecting excess band limited
 PXL_20230519_162346524.jpgMC_Fnoisehunting_Screenshot_2023-05-19_09-27-03.png 
  17630   Tue Jun 13 14:12:34 2023 MayankConfiguration Restarted the NDS2 script on Megatron[Radhika, Mayank]

Restarted the NDS2 script on Megatron
following the instructions here
  
  17636   Fri Jun 16 23:09:31 2023 MayankUpdate IFO working after ETMX electronics upgradeAfter lots of burtrestores and alignment
by Koji. The interferometer is live again.

The X/Y green beams are resonating.
 IFo.png 
  17637   Fri Jun 16 23:23:56 2023 KojiUpdate IFO working after ETMX electronics upgradeRemaining work:

Hardware


The +/-15V power supply
  
  17638   Mon Jun 19 01:05:49 2023 KojiUpdate IFO working after ETMX electronics upgradeETMX
Eurocard Crate investigation ~ Summary

-
 PXL_20230619_061807540.jpg 
  17642   Wed Jun 21 08:21:03 2023 JCUpdate IFO working after ETMX electronics upgradeAndrei asked me yesterday for the location
of the ambient temperature sensor for the
X-end. He mentioned that he needed to run
 Screenshot_2023-06-21_at_8.40.20_AM.png 
  17646   Thu Jun 22 00:27:27 2023 KojiUpdate IFO working after ETMX electronics upgrade[Koji, Hiroki]

ETMX OPLEV QPD was fixed.


- What we knew was that
 PXL_20230621_212041482.jpgPXL_20230622_005211516.jpgPXL_20230622_005224200.MP.jpg 
  17647   Thu Jun 22 00:47:00 2023 KojiUpdate IFO working after ETMX electronics upgrade[Mayank, Koji]

ETMX Sat amp (D080276)
CH3 PD receiver circuit fixed.
 PXL_20230621_235639337.jpg 
  17648   Thu Jun 22 01:04:42 2023 KojiUpdate IFO recoveryI wanted to check the oplev functionality
but the IFO was not well aligned. So started
the CDS recovery.
  
  17651   Thu Jun 22 22:34:43 2023 KojiUpdate IFO recovery[Hiroki, Mayank, Koji]

The X end PZT driver for green
alignment:
  
  17819   Thu Aug 31 10:15:21 2023 RadhikaUpdate Electronic CARM to ALS CARM handoff[Paco, Radhika]

ALS control of CARM

Yesterday
 ALS_CARM_OLTF.pdfALS_CARM_lockFPMI.pdf 
  17833   Thu Sep 7 21:09:17 2023 PacoUpdate eCARM and eDARM to ALS CARM and ALS DARMTonight
I managed to lock CARM and DARM under ALS
control only
 ALSCARMDARMlock_oolnoise_Screenshot_2023-09-07_21-32-31.pngALSerrortuning_Screenshot_2023-09-07_21-33-10.pngALSCARMDARM_oltfs_Screenshot_2023-09-07_21-36-34.png 
  17873   Mon Sep 25 17:01:46 2023 MurtazaUpdate IFO ALIGNED (WITH SOME ISSUES)[JC, Paco, Radhika, Murtaza]

IFO ALIGNED

1.
  
  17874   Tue Sep 26 14:07:00 2023 MurtazaUpdate IFO ALIGNED (WITH SOME ISSUES)[Paco, JC, Murtaza]

[WIP]

To fix the WFS loops, went through
  
  17879   Thu Sep 28 12:43:02 2023 RadhikaUpdate IFO ALIGNED (WITH SOME ISSUES)While aligning today I realized the cavAlign
step sizes and step factors had not been
updated after the upgrade.
  
  Draft   Thu Sep 28 16:45:54 2023 MurtazaUpdate IFO ALIGNED (WITH SOME ISSUES)[Rana, Radhika, Murtaza]

WFS Loop Debugging

-
  
  2653   Wed Mar 3 18:32:25 2010 AlbertoUpdate40m Upgrading11 MHz RFPD elctronics** Please
add LISO file w/ component values.
 
 rfpd11_v2_TF.pdfrfpd11_v2_Noise.pdf 
  2655   Thu Mar 4 08:43:35 2010 AlbertoUpdate40m Upgrading11 MHz RFPD elctronics


   
        
            
 rfpd11_v2.fil 
  2656   Thu Mar 4 19:53:56 2010 AlbertoUpdate40m Upgrading11MHz PD designed adjusted for diode's resistance; 55 MHz RFPD designedAfter
reading this study done
 6x 
  2657   Thu Mar 4 22:07:21 2010 ranaUpdate40m Upgrading11MHz PD not yet designedUse 10 Ohms for the resistance - I have
never seen a diode with 25 Ohms.
p.s. PDFs can be joined together
  
  2704   Tue Mar 23 22:46:43 2010 AlbertoUpdate40m UpgradingREFL11 upgradedI modified REFL11 according to the changes
lsited in this
schematic (see wiki  / Upgrade 09
 2010-03-23_REFL11_model_to_meas_comparison.png 
  2711   Wed Mar 24 14:57:21 2010 AlbertoUpdate40m UpgradingREFL11 upgraded 
 Hartmut suggested a possible
explanation for the way the electronics transfer
  
  2715   Thu Mar 25 17:32:42 2010 AlbertoUpdate40m UpgradingREFL55 UpgradedI upgraded the old REFL199 to the new REFL55.
To do that I had to replace the old
photodiode inside, switching to a 2mm one.
 2010-03-25_REFL55_model_to_meas_comparison.png2010-03-25_REFL55_model_to_meas_comparison.png 
  2761   Sat Apr 3 19:54:19 2010 AlbertoUpdate40m UpgradingREFL11 and REFL55 PDs Noise SpectrumThese are the dark noise spectrum that
I measured on the 11MHz and 55MHz PD prototypes
I modified.
 2010-04-03_REFL11_darknoise.png2010-04-03_REFL55_darknoise.png 
  2767   Mon Apr 5 10:23:40 2010 AlbertoUpdate40m UpgradingREFL11 Low Frequency Oscilaltion ReducedAfter adding an inductor L=100uH and a
resistor R=10Ohm in parallel after the OP547A
opamp that provide the bias for the photodiode
 2010_04_05_REFL11_darknoise_with_100uH_coil_10ohm_res.png2010_04_05_REFL11_darknoise_wide_freq_window_lid_open-closed.png2010_04_05_REFL11_darknoise_wide_freq_window_lid_open-closed.png 
ELOG V3.1.3-