40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 334 of 341  Not logged in ELOG logo
New entries since:Wed Dec 31 16:00:00 1969
ID Date Authorup Type Category Subject Text Attachments
  17146   Tue Sep 20 15:40:07 2022 yehonathanUpdateBHDTrying doing AC lockWe resume the LO phase locking work. MICH
was locked with an offset of 80 cts. LO and
AS beams were aligned to maximize the BHD
 Screenshot_2022-09-20_15-38-44.png 
  14825   Fri Aug 2 17:07:33 2019 yehonathan, gautamUpdateLoss Measurement We run a loss measurement on the Y arm
with 50 repetitions.
  
  12825   Mon Feb 13 17:19:41 2017 yinziConfiguration configuring ethernet for raspberry piGautam and I were able to get the Raspberry
Pi up and running today, including being
able to ssh into it from the control room.
 Screen_Shot_2017-02-13_at_5.11.52_PM.png 
  14205   Fri Sep 21 09:59:09 2018 yukiConfigurationASCY end table upgrade plan[Yuki, Gautam]

Attachments #1 is the current setup
of AUX Y Green locking and it has
 Pic_CurrentSetup_AUXYgreen.jpegModeMatchingSolution_Current.pdfModeMatchingSolution_Current_Magnified.pdfModeMatchingSolution_Optimized.pdfModeMatchingSolution_Optimized_Magnified.pdf 
  14211   Sun Sep 23 17:38:48 2018 yukiUpdateASCAlignment of AUX Y end green beam was recovered[ Yuki, Koji, Gautam ]

An alignment of AUX Y end green
beam was bad. With Koji and Gautam's
  
  14212   Sun Sep 23 19:32:23 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Gautam ]

The setup I designed before has
abrupt gouy phase shift between two steering
 Pic_NewSetup0923_AUXYgreen.jpegModeMatchingSolution_Result.pdfModeMatchingSolution_Magnified_0923.jpgpic0923_1.jpgpic0923_2.jpg 
  14214   Mon Sep 24 11:09:05 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Steve ]

With Steve's help, we checked
a new lens can be set soon after dichroic
 pic0924_1.jpg 
  14216   Tue Sep 25 18:08:50 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Gautam ]

We want to remotely control steeing
PZT mirrors so its driver is needed.
  
  14218   Thu Sep 27 14:02:55 2018 yukiConfigurationASCPZT driver board verification[ Yuki, Gautam ]

I fixed the input terminal that
had been off, and made sure PZT driver
 PZTdriverSimulationDiagram.pdfPZTdriverSimulationResult.pdfPZTdriverPerformanceCheck_ResultOUT.pdfPZTdriverPerformanceCheck_ResultMON.pdfPZTdriver.asc 
  14219   Sun Sep 30 20:14:51 2018 yukiConfigurationASCQPD calibration[ Yuki, Gautam, Steve ]

Results:
I calibrated a QPD (D1600079, V1009)
 QPDcalibrationXaxis.pdfQPDcalibrationYaxis.pdf 
  14221   Mon Oct 1 13:33:55 2018 yukiConfigurationASCQPD calibration


Quote:


 Pic_QPDcalibration.jpg 
  14224   Tue Oct 2 18:50:53 2018 yukiConfigurationASCPZT mirror calibration[ Yuki, Gautam ]

I calibrated PZT mirrors. The ROUGH
result was attached. (Note that some errors and
 PZTM1calibrationCH2.pdfPZTM1calibrationCH1.pdfPZTM2calibrationCH2.pdfPZTM2calibrationCH1.pdf 
  14226   Wed Oct 3 14:24:40 2018 yukiConfigurationASCY end table upgrade planInterim Procedure Report:

Purpose

The current setup of AUX Y-arm
  
  14227   Wed Oct 3 18:15:34 2018 yukiConfigurationASCAI board improvement[ Yuki, Gautam ]

I improved Anti-Imaging board (D000186-Rev.D),
which will be put between DAC port and
 TF_AIboard.pdf 
  14228   Thu Oct 4 00:44:50 2018 yukiConfigurationASCAI board improvement[ Yuki, Gautam ]

I made a cable which connects DAC
port (40 pins) and AI board (25 pins). I
  
  14230   Thu Oct 4 22:15:30 2018 yukiConfigurationASCY-end table upgradeBefore changing setup at Y-end table, I
measured the status value of the former setup
as follows. These values will be compared
 AUXYGreenLock20180921.jpgPic_FormerSetup.jpegPic_CurrentSetup1004.jpg 
  14232   Fri Oct 5 17:32:38 2018 yukiConfigurationASCY-end table upgradeI measured it with the wrong setting of
a powermeter. The correct ones are here:


beam power going into doubling
  
  14234   Fri Oct 5 22:49:22 2018 yukiConfigurationASCY-end table upgradeI designed a new layout. It has good mode-matching
efficiency, reasonable sensitivity to component
positions, good Gouy phase separation. I'm
  
  14236   Sun Oct 7 22:30:42 2018 yukiConfigurationLSCYarm Green locking was recoveredI finished installation of optics in the
Y-end and recovered green locking. Current
ALS-TRY_OUTPUT is about 0.25, which is lower
 Pic_NewLayout1007.jpgYendGreenModeMatching.zip 
  14237   Mon Oct 8 00:46:35 2018 yukiConfigurationASCY-end table upgrade


Quote:


  
  14240   Tue Oct 9 23:03:43 2018 yukiConfigurationLSCYarm Green locking was recovered[ Yuki, Gautam, Steve ]

To align the green beam in Y-end
these hardware were installed:
 Pic_1Y4.jpgPic_PZTcable.jpg 
  14241   Wed Oct 10 12:38:27 2018 yukiConfigurationLSCAll hardware was installedI connected DAC - AIboard - PZTdriver -
PZT mirrors and made sure the PZT mirrors
were moving when changing the signal
  
  14243   Thu Oct 11 13:40:51 2018 yukiUpdateComputer Scripts / Programsloss measurements


Quote:


  
  14245   Fri Oct 12 12:29:34 2018 yukiUpdateComputer Scripts / Programsloss measurementsWith Gautam's help, Y-arm was locked.
Then I ran the script "armloss_dcrefl_asdcpd_scope.py"
which gets the signals from oscilloscope.
  
  14248   Fri Oct 12 20:20:29 2018 yukiUpdateComputer Scripts / Programsloss measurementsI ran the script for measuring arm-loss
and calculated rough Y-arm round trip loss
temporally. The result was 89.6ppm. (The
  
  14251   Sat Oct 13 20:11:10 2018 yukiUpdateComputer Scripts / Programsloss measurements


Quote:


  
  14254   Mon Oct 15 10:32:13 2018 yukiUpdateComputer Scripts / Programsloss measurementsI used these values for measuring armloss:


Transmissivitity of ITM
= 1.384e-2 * (1 +/- 1e-2) 
Transmissivitity
 XARM_20181015_1500.pdfYARM_20181015_1500.pdf 
  14255   Mon Oct 15 12:52:54 2018 yukiUpdateComputer Scripts / Programsadditional comments


Quote:


  
  14257   Mon Oct 15 20:11:56 2018 yukiConfigurationASCY end table upgrade planFinal Procedure Report for Green Locking
in YARM:

Purpose
  
  14258   Tue Oct 16 00:44:29 2018 yukiUpdateComputer Scripts / Programsloss measurementsThe scripts for measuring armloss are in
the directory "/opt/rtcds/caltech/c1/scripts/lossmap_scripts/armloss_scope".


armloss_derefl_asdcpd_scope.py:
  
  14260   Wed Oct 17 20:46:24 2018 yukiConfigurationASCY end table upgrade planTo do for Green Locking in YARM:

The auto-alignment servo should
be completed. This servo requires many parameters
  
  14280   Wed Nov 7 05:16:16 2018 yukiUpdateComputer Scripts / Programsarm loss measuremenentsPlease check your data file and compare
with those Johannes made last year.
I think the power in your data file may have
  
  3622   Wed Sep 29 16:56:36 2010 yutaUpdateVAC2 doors opened(Steve, Koji, Joe, Kiwamu, Yuta)
Background:
 The vent was started on Monday,
  
  3623   Wed Sep 29 18:28:32 2010 yutaUpdateComputersaldabella connects to the wireless networkBackground:
 We need laptops that connect
to the wireless network to use them in the
  
  3627   Thu Sep 30 14:09:33 2010 yutaUpdateComputersmariabella connects to the wireless networkBackground:
 We need laptops that connect
to the wireless network to use them in the
  
  3630   Thu Sep 30 18:51:50 2010 yutaUpdateComputerssetting up aldabella and mariabella(Kiwamu, Yuta)

Background:
  
  3645   Mon Oct 4 19:48:00 2010 yutaUpdateVACseveral mirrors installed to ITMX/BS chamber(Koji, Kiwamu, Yuta)
Lots of progress
 P1060901.JPGP1060904.JPG 
  3656   Tue Oct 5 21:22:46 2010 yutaUpdateVACgreen beam reached PSL tableY  IMG_3627.jpg 
  3667   Thu Oct 7 14:39:50 2010 yutaUpdatePSLmeasured PMC's laser power-output relation(Rana, Yuta)

Motivation:
 PMCreflect.png 
  3672   Thu Oct 7 16:34:06 2010 yutaUpdatePSLmeasured PMC's laser power-output relationResult2:
 Attached is the visibility vs
incident power(assuming output of the PD
 PMCvis.png 
  3674   Thu Oct 7 17:53:07 2010 yutaUpdateComputersFarfalla with Firefox, fixed(Kiwamu, Yuta)

Symptom:
  
  3675   Thu Oct 7 23:24:44 2010 yutaUpdateCDSchecking MC1 suspension dampingBackground:
 The new CDS is currently being
set up.
  
  3689   Mon Oct 11 16:09:10 2010 yutaSummarySUScurrent OSEM outputsBackground:
 The output range of the OSEM
is 0-2V.
  
  3690   Mon Oct 11 17:31:44 2010 yutaUpdateCDSActivation of DAQ channels for 8 optics(Joe, Yuta)

Background:
  
  3692   Mon Oct 11 22:04:28 2010 yutaUpdateCDSdamping for MCs are basically workingBackground:
 Even if we can't use the Dataviewer
to get the time series of each 4 DOF displacements,
 SUS-MC1.pngSUS-MC2.pngSUS-MC3.png 
  3697   Tue Oct 12 15:51:18 2010 yutaBureaucracySAFETYthe 40m squad received safety training from PeterYuta, Joonho, and Suresh received the Basic
Laser Safety Training from Peter King today.
  
  3699   Tue Oct 12 17:42:57 2010 yutaUpdateSUSvery first measurement of Q-values for MC1Background:
 Data aquisition system is fixed,
and now we can use the Dataviewer to measure
 MC1ringdown.png 
  3700   Tue Oct 12 22:06:08 2010 yutaUpdateComputerscelan-installed CentOS 5.5 on mafaldaI clean-installed CentOS 5.5(32bit) on
mafalda.
No firewalls, no SELinix.
  
  3705   Wed Oct 13 11:09:28 2010 yutaUpdateComputersclean-installed CentOS 5.5 on mafaldaDear mafalda,
Sorry for leaving you alone.
We put ethernet cable in you. You
  
  3708   Wed Oct 13 18:01:43 2010 yutaHowToCDSeditting all the similar medm screens(Joe, Yuta)

Say, you want to edit all the similar
  
ELOG V3.1.3-