40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  PSL  Not logged in ELOG logo
Entry  Sun Sep 23 18:28:04 2012, tara, Notes, Drawings, 1.45" refcav mount cav_mount_assembly2.PDFcav_mount_assembly2.PDFcav_mount_bottom.PDFcavity_mount_top.PDF
    Reply  Thu Sep 27 17:13:13 2012, tara, Notes, Drawings, 1.45" refcav mount cav_mount_assembly_3.PDFpeek_v2.PDF
       Reply  Thu Oct 4 23:28:06 2012, tara, Notes, RefCav, comsol simulation for cavity suspension cavity_sagging_2012_10_04.pngcavity_sagging_0_2012_10_04.png
          Reply  Wed Oct 10 01:38:49 2012, tara, Notes, RefCav, comsol simulation for cavity suspension 
             Reply  Wed Oct 10 21:31:57 2012, tara, Notes, RefCav, comsol simulation for cavity suspension plot.pngcavity_sagging_0_2012_10_04.png
                Reply  Thu Oct 11 19:07:06 2012, tara, Notes, RefCav, comsol simulation for cavity suspension plot_degree_area.png
                   Reply  Sat Oct 13 23:38:08 2012, tara, Notes, RefCav, comsol simulation for cavity suspension dis_tilt_12_45.png
                      Reply  Tue Oct 16 01:14:00 2012, tara, Notes, RefCav, comsol simulation for cavity suspension disx_y.png
                         Reply  Wed Oct 24 11:16:52 2012, tara, Notes, RefCav, comsol simulation for cavity suspension analyzed_plot.pnganalyzed_plot.figIMG_1914.jpg
                            Reply  Fri Oct 26 04:05:18 2012, tara, Notes, RefCav, comsol simulation for cavity suspension plot_line.pngplot_line.pngplot_line.pngplot_angle.png
                               Reply  Tue Feb 4 01:11:01 2014, tara, Notes, RefCav, comsol simulation for cavity suspension 
                                  Reply  Tue Mar 4 18:53:48 2014, tara, Notes, RefCav, comsol simulation for cavity suspension hist_small_mount_err.pnghist_small_mount_err.fig
       Reply  Wed Oct 31 16:00:13 2012, tara, Notes, Drawings, 1.45" refcav mount Assem2.PDFAssem2_1.PDF
          Reply  Thu Nov 8 20:00:33 2012, tara, Notes, Drawings, 1.45" refcav mount 7x
Message ID: 1058     Entry time: Wed Oct 10 01:38:49 2012     In reply to: 1056     Reply to this: 1060
Author: tara 
Type: Notes 
Category: RefCav 
Subject: comsol simulation for cavity suspension 

I'm still working on COMSOL, now my model has the following features:

  • support points are simulated by four rectangles on the spacer surface. The support areas can be changed, and their positions can be moved along the beamline and around the cross section directions. I'm still not sure what should be the effective area for the simulation. However, the paper from Milo's group [2009] showed that the areas of the supports points do not affect the optimum position that much (but the support must be constrained in the same direction as gravity only). I have not tried to constrained the points in only one direction yet.
  • I used a symmetry plane to model only half of the spacer. This will reduce some simulation time and avoid any asymmetry due to the mesh size.
  • I'm trying to use matlab with comsol and print out the result. The work is stil in progress.

 

Note:

Milo etal. 2009 Phys Rev A 79.053829.

ELOG V3.1.3-