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.
BASEX method
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.