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Entry  Mon Oct 25 13:23:45 2021, Anchal, Summary, BHD, Before photos of BSC 
    Reply  Mon Oct 25 17:37:42 2021, Anchal, Summary, BHD, Part I of BHR upgrade - Removed optics from BSC rn_image_picker_lib_temp_44cb790a-c3b4-42aa-8907-2f9787a02acd.jpgrn_image_picker_lib_temp_0fd8f4fd-64ae-4ccd-8422-cfe929d4eeee.jpg
       Reply  Tue Oct 26 16:56:22 2021, Paco, Summary, BHD, Part I of BHR upgrade - Locked PMC and IMC 
          Reply  Wed Oct 27 16:27:16 2021, Anchal, Summary, BHD, Part II of BHR upgrade - Prep OMCNorthBefore.jpegOMCNorthAfter.jpeg
             Reply  Wed Oct 27 16:31:35 2021, Anchal, Summary, BHD, Part III of BHR upgrade - Removal of PR2 Small Suspension 
                Reply  Thu Oct 28 16:32:32 2021, Paco, Summary, BHD, Part IV of BHR upgrade - Removal of BSC eastern optics 
                   Reply  Fri Nov 5 12:21:16 2021, Anchal, Summary, BHD, Part VI of BHR upgrade - Removal of ITMYC optics XendFlowBenchLeftEnd.jpgXendFlowBenchMiddle.jpgXendFlowBenchRightEnd.jpg
                      Reply  Wed Dec 15 16:11:38 2021, Anchal, Summary, BHD, Part VIII of BHR upgrade - Placed LO1 signal-2021-12-15-161437.jpeg
                         Reply  Wed Dec 15 17:44:18 2021, Koji, Summary, BHD, Part VIII of BHR upgrade - Placed LO1 
                            Reply  Thu Jan 6 21:04:41 2022, Anchal, Summary, BHD, Part VIII of BHR upgrade - LO1 OSEMs inserted 
                               Reply  Mon Jan 10 14:52:51 2022, Anchal, Summary, BHD, LO1 OSEMs roughly calibrated and noise measured LO1_vs_ETMX_OSEM_Spectrum_LF_x30_Gain.pdfLO1_vs_ETMX_OSEM_Spectrum_HF_x30_Gain.pdf
                                  Reply  Mon Jan 10 18:36:41 2022, Anchal, Summary, BHD, LO1 free swinging test set to trigger 
                                     Reply  Tue Jan 11 12:19:12 2022, Anchal, Summary, BHD, LO1 Input Matrix Diagonalization performed. LO1_SUS_InpMat_Diagnolization.pdfLO1_FreeSwingData_PeakFitting.pdf
                         Reply  Thu Jan 6 11:54:20 2022, Anchal, Summary, BHD, Part IX of BHR upgrade - Placed AS1 and AS4 
                            Reply  Fri Jan 7 16:17:42 2022, Anchal, Summary, BHD, Part IX of BHR upgrade - Placed AS1 and AS4 filters 
                               Reply  Sat Jan 8 16:01:42 2022, Paco, Summary, BHD, Part IX of BHR upgrade - Placed LO2 filters 
                                  Reply  Tue Jan 18 14:26:09 2022, Paco, Summary, BHD, Part IX of BHR upgrade - Placed remaining filters SR2, PR3, PR2 
                               Reply  Tue Jan 11 18:18:29 2022, Anchal, Summary, BHD, Attempted OSEM installation on AS1 
                                  Reply  Tue Jan 11 18:40:25 2022, Anchal, Summary, BHD, AS1 Sat Amp has a PCB issue signal-2022-01-11-184917.jpeg
                                     Reply  Thu Jan 13 09:48:41 2022, Anchal, Summary, BHD, AS1 Sat Amp fixed signal-2022-01-13-094823_001.jpegsignal-2022-01-13-094823_002.jpeg
                                  Reply  Thu Jan 13 12:24:08 2022, Anchal, Summary, BHD, AS1 SD and LR magnets broke 
                            Reply  Thu Jan 13 12:29:27 2022, Anchal, Summary, BHD, AS4 LR magnet broke 
                               Reply  Fri Jan 14 18:12:47 2022, Anchal, Summary, BHD, AS4 placed in ITMY Chamber, OSEMs connected 
                                  Reply  Tue Jan 18 18:19:22 2022, Koji, Summary, BHD, AS4 placed in ITMY Chamber, OSEMs connected Screen_Shot_2022-01-18_at_17.48.16.pngcable_swap.png
                                     Reply  Wed Jan 19 12:56:52 2022, Paco, Summary, BHD, AS4 OSEMs installation 
                                        Reply  Thu Jan 20 16:42:55 2022, Paco, Update, BHD, AS4 OSEMs installation - part 2 
                                           Reply  Thu Jan 20 18:16:29 2022, Anchal, Update, BHD, AS4 set to trigger free swing test 
                   Reply  Tue Jan 18 15:19:49 2022, Paco, Summary, BHD, Part IV of BHR upgrade - Replaced old SR3 with SOS SR2. OSEM tuning attemtped. PXL_20220119_012954365.jpgPXL_20220119_013003522.jpg
                      Reply  Tue Jan 18 18:16:28 2022, Anchal, Summary, BHD, Part IV of BHR upgrade - SR2 Sat Amp Box inspection 
                         Reply  Wed Jan 19 12:50:10 2022, Anchal, Summary, BHD, Part IV of BHR upgrade - SR2 OSEM tuning progress. 
                            Reply  Thu Jan 20 17:03:36 2022, Anchal, Summary, BHD, Part IV of BHR upgrade - SR2 OSEM tuned. DJI_0144.JPG
                               Reply  Thu Jan 20 18:41:55 2022, Anchal, Summary, BHD, SR2 set to trigger free swing test 
                Reply  Thu Oct 28 17:01:54 2021, Anchal, Summary, BHD, Part III of BHR upgrade - Adding temp fixed flat mirror for PR2 
             Reply  Wed Oct 27 16:38:02 2021, Anchal, Summary, BHD, Part II of BHR upgrade - Relocation of TT2 and MMT1/2 alignment 
                Reply  Wed Oct 27 18:11:37 2021, Koji, Summary, BHD, Part II of BHR upgrade - Relocation of TT2 and MMT1/2 alignment 
                Reply  Wed Oct 27 18:16:45 2021, Koji, Summary, BHD, Part II of BHR upgrade - Relocation of TT2 and MMT1/2 alignment 
Message ID: 16432     Entry time: Wed Oct 27 16:31:35 2021     In reply to: 16431     Reply to this: 16437   16438
Author: Anchal 
Type: Summary 
Category: BHD 
Subject: Part III of BHR upgrade - Removal of PR2 Small Suspension 

I went inside the ITMX Chamber to read off specs from PR2 edge. This was required to confirm our calculations of LO power for BHR later. The numbers that I could read from the edge were kind of meaningless "0.5 088 or 2.0 088". To make it more worthwhile this opening of the chamber, we decided to remove the PR2 suspension unit so that the optic can be removed and installed on an SOS in the cleanroom. We covered the optic in clean aluminum foil inside the chamber, then placed in on another aluminum foil to cover completely. Then I traveled slowly to the C&B room, where I placed it on a flow bench.


Later on, we decided to use a dummy fixed mount mirror for PR2 initially with the same substrate thickness, so that we get enough LO power in transmission for alignment. In the very end, we'll swap that with the PR2 mounted on an SOS unit.

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