Analysis of Density of Rb MOT
by Cameron Cook
supervisors: Brett DePaola, Larry Weaver
Instructions to get Vrakking’s and BASEX’s files from a picture
To begin, make sure camera is plugged into the firewire and facing the MOT viewing port.
Open Measurement and Automation program from National Instruments. Expand Devices and Interfaces. Click on avt0:Guppy… Now when you press either “grab” or “snap” a picture should show up. Change the gain, brightness and shutter speed until the picture is bright enough to see all features but not saturated.
Once satisfied, close the program and open “C:\Guppy\Guppy.vi”. This will open Labview. Press the white arrow at the top, then Run. This will take a picture of what the camera sees. To save the picture, press “save picture to file” at bottom center and press Run. This will save the files to “c:\guppy\test”. If you are going to invert the pictures in BASEX, make sure the dimensions are an odd number of pixels long and wide. When done, press stop or click on stop sign; close program.
Go to S:\depaola_motrims_group\group_members\Cameron\BaseX and click basex.exe. The perform regularization box should already be checked. Leave all other boxes checked. The options are explained in Instructions.doc. Click Read/Save as a Matrix, input the dimensions, check “Use ‘TAB’ delimiter”. Open file with Guppy picture then reconstruct image. Close BASEX.
Go back to S:\depaola_motrims_group\group_members\Cameron\ and open folder labeled Python. Then open python programs, then useful programs. Right click iotest_TEST_smooth_new_fixed.py and click edit with IDLE. Run program and choose “y” for writing to a file. Python will then use an Abel Transform to deconstruct the image back into a 2-D plot. It will also make a comparison graph in the same program. You can look at these in Origin.
Vrakking iterative method
If you prefer to use Vrakking, go to S:\depaola_motrims_group\group_members\Cameron\Iterative. In Invert_Sankar file, there is a document named readme.txt. Open it and read it; it explains all the files that Vrakking creates. Go back to Iterative file and open input.dat and change the variables to whatever you like. Now right click inversie_cameron.for and open with “Force-Fortran Compiler and Editor”. From lines 48-60, change the files to match whatever number your picture number was from Guppy, EXCEPT FOR LINE 58 WITH THE FILE 'input.dat' DO NOT CHANGE THIS LINE. Now press Run and it’ll open a DOS window and do all the iterations. After it’s done you can close the DOS window, Force will return on the screen, and all your files will be in my Iterative folder. You can open these with Origin as before.