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ID Date Author Type Category Subject Text   10185   Fri Jul 11 15:29:26 2014 Harry Update General Telescope With Collimator  I used a la mode to make a design for the coupling telescope with a 3.3um target waist, that included the collimator in the      10204   Tue Jul 15 18:26:40 2014 Harry Update General Beam Waist, Telescope, and Fiber Coupling  Goal To design an optical setup (telescope / lens) to couple 1064nm NPRO light into      10205   Tue Jul 15 18:39:04 2014 Harry Update General Weekly Plan (7.16.14)  The Past Week   Attempted to design coupling telescope,      10213   Wed Jul 16 01:54:25 2014 Nichin Update General Work plan for next week 1) Debugging transimpedance calculations in the PDFR Requires      10215   Wed Jul 16 07:51:52 2014 Akhil Update General Weekly Update Work Done:     Solved all the timing      10218   Wed Jul 16 17:34:11 2014 Harry Update General Fiber Coupled  Purpose To couple the spare NPRO into our Panda PM980 fibers, in order to carry out      10230   Thu Jul 17 17:08:58 2014 Harry Update General 1X2 Rack Changes  Purpose   Steve and I moved some things around      10233   Thu Jul 17 21:01:28 2014 Manasa Update General 1X2 Rack Changes                                10234   Thu Jul 17 22:08:14 2014 Koji Update General 1X2 Rack Changes It sounds like the work was done carefully. Even so, Jenne or Manasa have to run the ALS (X and Y) to check if they are still      10240   Sat Jul 19 01:59:34 2014 Harry Update General Fiber Mode Measurement Purpose  We wanted to measure the mode coming out of the fibers, so we can later couple      10244   Mon Jul 21 10:30:38 2014 Harry Update General Fiber Mode Measurement  Purpose The idea was to measure the profile of the light coming out of the fiber, so      10249   Mon Jul 21 18:08:19 2014 Harry Update General Fiber Mode Measurement                                10255   Tue Jul 22 16:26:04 2014 Harry Update General Fiber Mode Measurement I repeated this process once more, this time using the computer controlled stage that the beam profiler is designed to be      10256   Tue Jul 22 17:45:11 2014 Harry Update General Weekly Update  The Past Week   I spent the past week coupling NPRO      10257   Tue Jul 22 23:10:12 2014 Akhil Update General Weekly Update  Work Done      10260   Wed Jul 23 10:40:23 2014 Nichin Update General Weekly Update To do:    Measure and calibrate out  attenuation and phase changes due to RF cables in the      10264   Wed Jul 23 17:54:51 2014 Harry Update General Coupling Improvements plus PER Measurement Setup  Purpose We wanted to improve the coupling into the fibers, because it's very rarely      10268   Thu Jul 24 09:18:15 2014 Steve Update General four days        10271   Thu Jul 24 17:37:19 2014 Harry Update General Coupling Improvements plus PER Measurement Setup                                10272   Thu Jul 24 19:28:43 2014 Akhil Update General Thermal Actuator Transfer Functions  As a part of temperature actuator characterization, today Eric Q and I made some measurements for the open loop TF of      10273   Fri Jul 25 17:28:31 2014 Harry Update General FOL Box and PER Update  Purpose We're putting together a box to go into the 1X2 rack, to facilitate the frequency      10274   Sat Jul 26 10:12:19 2014 Akhil Update General Data Acquisition from FC into EPICS Channels  I succeeded in creating a new channel access server hosted on domenica ( R Pi) for continuous data acquisition from the      10275   Sat Jul 26 13:10:14 2014 Akhil Update General Thermal Actuator Transfer Functions Koji said that the method we used for X-arm thermal actuator TF measurement was not correct and suggested us to make measurements separately      10276   Sat Jul 26 13:38:34 2014 Jamie Update General Data Acquisition from FC into EPICS Channels                                10277   Sat Jul 26 14:35:28 2014 Akhil Update General Data Acquisition from FC into EPICS Channels                                10281   Mon Jul 28 16:34:02 2014 Akhil Update General Calibration of measured Thermal Actuator TFs  To calibrate the measured TFs and characterize the thermal actuator for the FOL loop, we [ Me, Eric Q, Koji ] made the      10282   Mon Jul 28 17:25:32 2014 Harry Update General Fiber Mode With Collimators  Purpose We want a measurement of the fiber modes at either end, with the collimators,      10283   Mon Jul 28 17:53:00 2014 Akhil Update General Work plan for the Upcoming weeks- FOL Project  [Akhil, Harry] Work Completed      10287   Tue Jul 29 18:52:42 2014 Harry Update General PSL and AUX Coupling Waist Measurement //edit Manasa//  Harry will update this elog with before/after pictures of the table and power of the 1064nm rejected beam  9x    10289   Tue Jul 29 19:00:40 2014 Harry Update General Weekly Plan (7.29.14)  The Past Week In the past week, I have improved the coupling in the fiber testing setup on      10297   Wed Jul 30 11:15:44 2014 Akhil Update General Weekly Update  Plan for the week:     PID loop design and testing with the Green laser beat note by actuating      10298   Wed Jul 30 15:33:48 2014 Akhil Summary General Calibrated Thermal Actuator TFs  The goal of the measurements we made ( my previous 3 elogs) was to characterize the laser frequency thermal actuator that      10299   Wed Jul 30 18:09:08 2014 Harry Update General AUX and PSL Coupling Telescopes  Purpose These telescopes will be used to mode match//couple the dumped SHG light from      10301   Wed Jul 30 23:12:05 2014 Koji Update General IFO patrol - The cable for the beat note was disconnected from the frequency counter and reconnected to the spectrum analyzer.      10308   Thu Jul 31 15:25:51 2014 Harry Update General PolarizationExtinction Ratio of Fibers  Purpose We wanted to measure the PER of the polarization maintaining fibers, so we could      10312   Thu Jul 31 21:59:25 2014 Koji Bureaucracy General Ants Don't leave your food on tables and desks! Also I put the souvenir chocolates      10318   Fri Aug 1 03:49:26 2014 Koji Summary General Koji - to do - Put the circuit diagram of the sum amp on/in the circuit enclosure and associate it with an elog [done].      10325   Fri Aug 1 22:56:27 2014 Koji Update General Beam lost in the chamber??? I was investigating several issues on the IFO. As many of you noticed and not elogged, ITMX had frequent kicking without its oplev      10326   Sun Aug 3 17:19:32 2014 ericq Update General Recovery efforts [ericq, Jenne] We both happened to come by today to fix things up.      10327   Sun Aug 3 23:47:56 2014 Koji Update General Recovery efforts It's great that you guys found the beam. Yes, ITMX kick and lost communication      10329   Mon Aug 4 17:30:00 2014 ericq Update General Chronic Suspension Problems TRX and TRY communication were recovered by doing a simultaneous reboot of all of the frontends.      10330   Mon Aug 4 18:25:46 2014 Jenne Update General Chronic Suspension Problems Q is working on fixing the "save offsets" script for the ASS, because that has lost me my alignment two more times in the last      10333   Tue Aug 5 19:05:41 2014 Akhil Update General Beat Note Testing on EPICS Channels        10334   Tue Aug 5 19:20:05 2014 Akhil Update General PID loop Design for beat note stabilization  Today I and EricQ went inside the lab and set up the cables running from the a DAC channel into  PZT input so that      10336   Wed Aug 6 10:10:45 2014 Harry Update General Weekly Plan 8.6.14 Last Week   Took first round of PER measurements      10347   Thu Aug 7 14:50:43 2014 Harry Update General PER Measurement  Purpose I wanted to do a more robust measurement of PER of PM fibers for FOL, so I thought      10349   Thu Aug 7 17:09:53 2014 Harry Update General AUX Coupling In Progress  I'm currently in the process of coupling dumped SHG light from the Y arm end table into fibers for FOL.      10353   Fri Aug 8 14:42:41 2014 Akhil Update General PID loop Design for beat note stabilization  The attached in a zip file are the Simulink feedback loop models for the FOL for both X and Y ends. The controller PID      10357   Fri Aug 8 19:42:59 2014 Jenne Metaphysics General kitchen sink flooding  When I got back to the lab, there was enough water that it was seeping under the wall, and visible outside. Physical plant      10358   Fri Aug 8 20:22:12 2014 Jenne Metaphysics General kitchen sink water off

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