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ID Date Author Type Category Subject Text   4644   Thu May 5 15:33:37 2011 steve Configuration RF System LSC rack New right angle PVC front panel with SMA bulkhead connectors are in place. The connections are still lose. It is ready for Suresh to      4650   Fri May 6 06:36:18 2011 Suresh Update RF System PD DC signals at each port connected We now have the DC signal from three PDs available in the ADC channels 14,15 and 16.  The      4657   Sat May 7 10:59:11 2011 Suresh Update RF System RF Source filters changed   The SLP-50 filters which were on the 55 MHz lines      4670   Mon May 9 17:23:25 2011 Suresh Update RF System RF Cables near LSC Rack [Steve, Suresh] We started to clean up the RF cables (heliax and PD interface cables)  at      4675   Tue May 10 01:39:41 2011 Suresh Update RF System RF source troubles Today after Steve and I finished the RF cabling work for the day, Kiwamu noticed that there were no RF signals to be seen.       4698   Thu May 12 02:31:07 2011 Suresh Update RF System installation of RF splitters in Demod boards [Jamie, Koji, Suresh] We replaced splitters in several demod boards as per the table given below:      4702   Thu May 12 10:27:02 2011 rana Update RF System installation of RF splitters in Demod boards                                4703   Thu May 12 16:50:22 2011 Suresh Update RF System installation of RF splitters in Demod boards We have no plan to change the AS11 PD.  I was referring to the AS11 Demod board which currently has the "Demodulator      4708   Thu May 12 23:50:10 2011 Suresh Update RF System POY55_Demod board Hardware change completed The Demod board with S. No. 022 (being used earlier as REFL11) has been modified.  It now has SCLF-65 as its input LP filter      4711   Fri May 13 01:51:56 2011 Suresh Update RF System RF Status update I have posted the attached RF status update and 1Y2 rack layout to the svn.      4714   Fri May 13 22:45:37 2011 Suresh Update RF System The full set of 8 Demod boards is ready for testing We have Completed the hardware changes to the full set of 8 demod boards.  The last one completed today is AS11.       4715   Fri May 13 23:04:58 2011 Suresh Update RF System DC power supply on RF distribution box has been replaced. [Steve, Koji, Suresh]    We shifted two Sorensen power supplies from the Auxiliary rack next      4716   Sat May 14 14:12:16 2011 Koji Update RF System DC power supply on RF distribution box has been replaced. Key points of the power supply installation     We      4736   Wed May 18 07:13:00 2011 Suresh Update RF System Demod board measurements I measured the amplitude and phase imbalances of the demod boards which have been modified.  This is just a basic health check.       4737   Wed May 18 07:18:15 2011 Suresh Update RF System POY55_Demod board Hardware change completed The ~350 Hz noted in the elog below was traced to an RF modulation of the 11 MHz sideband.  This modulation was set up      4738   Wed May 18 15:54:50 2011 Koji Update RF System DC power supplies for the RF generation box in place [Koji, Steve] DC power supplies for the RF generation box are now in place. They are the top two      4739   Wed May 18 16:52:23 2011 Suresh Update RF System Cables for AS11 PD are in place [Larisa, Suresh] All the cables needed for the AS11 PD are in place... the heliax cable runs      4740   Wed May 18 17:06:39 2011 Suresh Update RF System DC power supplies for the RF generation box in place   I have checked the voltages on the connector.  They are okay and I have      4751   Thu May 19 19:41:17 2011 Suresh Update RF System DAQ channel Assignments for RF PDs [Kiwamu, Suresh] In trying to keep the wiring of the LSC rack as neat as possible, we came up      4755   Fri May 20 05:41:22 2011 Suresh Update RF System Demod board measurements The POP110 board which had the large Amplitude and Phase unbalances was examined today.  It turned out that there was some stray solder      4804   Fri Jun 10 12:04:57 2011 Jenne Update RF System Bad RF connections!! I am in the process of calibrating AS55's shot noise, and I noticed that the AS55 PD input to the demod board was only finger-tight.       4957   Fri Jul 8 19:50:19 2011 Suresh Update RF System LSC rack channel assignment [Jamie, Suresh]    We looked at the ADC channel assignments in the LSC model and      5249   Tue Aug 16 16:59:20 2011 Anamaria Update RF System AM in the PM Kiwamu, Keiko, Anamaria Looking at the I and Q signals coming from REFL11 and REFL55 we saw large offsets,      5251   Wed Aug 17 02:48:56 2011 kiwamu Update RF System Re: AM in the PM [Keiko / Suresh / Anamaria / Kiwamu]  The AM      5278   Mon Aug 22 20:37:43 2011 Anamaria Configuration RF System Plan for install of 3f PDs I made a quick sketch of how to include two more RF PDs on the REFL beam, given the space we have on the table. We want to install      5921   Thu Nov 17 11:04:02 2011 Jenne Update RF System Stochmon? Is there an update on Stochmon?  Are the signals acquired somewhere already?  What's the current deal-io?  The new      5923   Thu Nov 17 11:35:27 2011 Koji Update RF System Stochmon? The  Stochmon channels for 11&55MHz have been reasonably working since last night. The output is not yet calibrated      5926   Thu Nov 17 14:38:16 2011 Zach Update RF System Stochmon? It turns out that we don't have all the parts I would need to do a full prototype      5951   Fri Nov 18 19:07:07 2011 Jenne Update RF System Foam house on EOM [Jenne, Zach, Frank] Frank helped Zach and I cable up at PT-100 RTD, and make sure it worked with      5954   Sat Nov 19 00:09:02 2011 Zach Update RF System Foam house on EOM                                5955   Sat Nov 19 00:34:36 2011 Zach Update RF System why the Newport 6000 isn't working  I just figured out why the Newport 6000 isn't stabilizing the temperature. It is designed      5976   Tue Nov 22 06:12:43 2011 Zach Update RF System Prototype temperature controller Tonight I built a simpler version of      5984   Wed Nov 23 00:30:14 2011 Zach Update RF System EOM temperature controller trials [Jenne, Zach] We did some testing of the prototype temperature controller. When I left it late      6022   Mon Nov 28 14:27:35 2011 Jenne Update RF System EOM temp driver Here is 5 days of trend of the EOM temp sensor and the heater driver monitor.  Unfortunately, it looks like we're regularly      6023   Mon Nov 28 14:40:43 2011 Koji Update RF System EOM temp driver                                6025   Mon Nov 28 15:43:36 2011 steve Update RF System EOM temp zoomed                                6032   Tue Nov 29 02:09:15 2011 Zach Update RF System EOM temp stabilization fixed I inspected the temperature stabilization circuit today to see why it wasn't working. It didn't make sense that it just kept railing      6035   Tue Nov 29 14:22:03 2011 Zach Update RF System EOM temp stabilization performance I left the EOM stabilization running overnight, so we can finally see how the EOM temperature stabilization does over long periods of time.      6036   Tue Nov 29 15:25:29 2011 steve Update RF System EOM temp stabilization performance  It is not obvious what is working.        6040   Tue Nov 29 18:17:27 2011 Zach Update RF System EOM temp stabilization performance                                6043   Tue Nov 29 19:08:53 2011 Zach Update RF System EOM heater disconnected I disconnected the heater at ~2:20 UTC, leaving the sensor circuit operational. Don't be fooled by the apparent      6044   Tue Nov 29 22:10:18 2011 kiwamu Update RF System RFAM fluctuation reduced                                6047   Tue Nov 29 23:03:34 2011 Zach Update RF System RFAM fluctuation reduced I was hesitant to claim that this is definitely true without the control data we were taking      6050   Wed Nov 30 03:01:55 2011 kiwamu Update RF System RFAM fluctuation reduced Okay I have turned ON the temperature control at 2:40 AM and will leave it ON for a while.      6053   Wed Nov 30 13:52:09 2011 Zach Update RF System EOM temp stabilization ineffectual This recent off/on run proved what I was afraid of: the temperature stabilization setup appears to do nothing except very near      6054   Wed Nov 30 14:12:53 2011 Jenne Update RF System New EOM mount almost ready The new EOM adapter plate and riser just got back from the shop.  I just had Mike do the milling, and I'll drill and tap      6055   Wed Nov 30 22:09:20 2011 Zach Update RF System some final EOM stabilization efforts First, things that were done:     I was troubled by the odd-looking noise in the EOM temperature      6056   Thu Dec 1 01:24:56 2011 Jenne Update RF System EOM temp stabilization at PSL lab [Frank, Jenne] Activities in a far, far away land called PSL lab...      6059   Thu Dec 1 12:27:51 2011 Zach Metaphysics RF System RAM diagnosis/suppression plan? It seems like there is some confusion---or disagreement---amongst the lab about how      6069   Mon Dec 5 09:46:21 2011 Zach Metaphysics RF System RAM diagnosis/suppression plan? Since no one has made any comments

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