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Entry  Thu Mar 10 16:29:32 2016, gautam, Update, endtable upgrade, Inventory check Inventory_check.pdfDoubler_comparison.pdf
    Reply  Thu Mar 10 16:32:45 2016, rana, Update, endtable upgrade, Inventory check 
       Reply  Mon Mar 14 22:42:23 2016, gautam, Update, endtable upgrade, Inventory check 
       Reply  Mon Mar 28 10:43:18 2016, Steve, Update, endtable upgrade, ETMX 4'x2' optical table pictures ETMX4x2Layout.jpgETMX_4x2.JPGETMXopt_4x2.JPG
          Reply  Wed Mar 30 17:38:52 2016, gautam, Update, endtable upgrade, X end table proposed layout  ETMX_3x2.JPGlayout_details_20160328.pdfETMX_proposed_layout.pdf
             Reply  Thu Mar 31 09:38:41 2016, Steve, Update, endtable upgrade, Y end 4x3 existing layout ETMY4x3layout.jpg
                Reply  Thu Mar 31 19:49:31 2016, gautam, Update, endtable upgrade, proposed layout v2 ETMX_proposed_layout_v2.pdf
                   Reply  Mon Apr 4 10:59:12 2016, gautam, Update, endtable upgrade, proposed layout v3 ETMX_proposed_layout_v3.pdfIR_modematch.pdfGreen_modematch.pdfXendALaMode.zipETMX_proposed_layout_dimensions.dwg
                      Reply  Mon Apr 4 15:04:14 2016, gautam, Update, endtable upgrade, COMPONENT REMOVAL 
                         Reply  Tue Apr 5 11:42:17 2016, gaericqutam, Update, endtable upgrade, TABLE REMOVAL 
                            Reply  Wed Apr 6 17:52:21 2016, gautam, Update, endtable upgrade, First contact cleaning commenced 
                               Reply  Thu Apr 7 12:51:24 2016, gautam, Update, endtable upgrade, Beam height differences 
                                  Reply  Thu Apr 7 14:30:58 2016, Steve, Update, endtable upgrade, ETMX table height ETMXbrs.pngETMX.jpgIMG_0618.JPGETMX.jpgETMXwc.jpg
                                     Reply  Fri Apr 8 09:13:20 2016, Steve, Update, endtable upgrade, ETMX-T beam height ETMXalignedT.pngETMXF.jpg
Message ID: 12058     Entry time: Thu Mar 31 19:49:31 2016     In reply to: 12057     Reply to this: 12060
Author: gautam 
Type: Update 
Category: endtable upgrade 
Subject: proposed layout v2 

The major changes from the previous layout:

  1. I've depicted the Green reflected beam path more accurately - I approximately measured the angle of the rejected beam from the faraday from the Y-end setup. This looks like a workable solution, and is similar to what we have currently at the Y-end
  2. I've added some optics to monitor the DC power and RIN of the AUX laser
  3. I've added two lenses to the input path of the Oplev beam (the path is such that I think we can use the same lenses that are currently being used. 
  4. I've now drawn the beams in CAD so that is marginally neater.

To do:

  1. Post mode matching solutions for AUX laser to doubler and green beam to arm for this proposed layout (should be identical to what we have now, which at least according to the calculation is a good solution, but I will double check - I also need to quantify what the effect of the elliptical beam is)
  2. Check the Gouy phase of the transmitted IR beam at the QPD - we may need to change some lenses in this path. But I think the path as such is close enough (distance-wise) to what we have currently at the X end (after accounting for the fact that the new endtable edge will be closer to the ETM) so I don't expect this to be a show-stopper.

Does any part of this layout need a radical redesign? 

Attachment 1: ETMX_proposed_layout_v2.pdf  271 kB  | Show | Show all
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