JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018

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bam_group [2018/09/13 21:40]
hamaker [DAY 3:] 		bam_group [2018/09/13 21:44] (current)
hamaker [DAY 4:]
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 Today we are working on problem 8. We are using the command ''SA <DX> <DY>'' to change the beam position. ''SA <DX> <DY>'' offsets the optics axis x by DX and y by DY. To 5th order, changing the x offset by .5 mm leads to a 5% change in the mass resolution. Any amount of change of the y offset leads to no change in the mass resolution. This is pretty weird... Today we are working on problem 8. We are using the command ''SA <DX> <DY>'' to change the beam position. ''SA <DX> <DY>'' offsets the optics axis x by DX and y by DY. To 5th order, changing the x offset by .5 mm leads to a 5% change in the mass resolution. Any amount of change of the y offset leads to no change in the mass resolution. This is pretty weird...
-We changed the beam size by changing the values of variables X and Y. By changing X by .1 mm, the mass resolution decreased by 5%. We changed the beam size by changing the values of variables X and Y. By changing Y by .1 mm, the mass resolution does not change.+We changed the beam size by changing the values of variables X and Y. Increasing X by .1 mm caused the mass resolution to decrease by 5%. Increasing Y by the same amount leads to no change in the mass resolution...
  
 By adding 2 mm to the lengths of quad 3 and 4 and decreasing the drift lengths after them by 2 mm, we reach a 5% change in the mass resolution. By adding 2 mm to the lengths of quad 3 and 4 and decreasing the drift lengths after them by 2 mm, we reach a 5% change in the mass resolution.
-We can shift optical elements by placing the SA command before and after the element you are shifting. For instance, if you want to shift a quadrupole in the positive y-direction by 5 mm, you would use the following command:+We can shift optical elements in the x-y plane by placing the SA command before and after the element you are shifting. For instance, if you want to shift a quadrupole in the positive y-direction by 5 mm, you would use the following command:
  
  ''SA 0 .005;''  ''SA 0 .005;''
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 We used this command to shift quadrupole 3 up by 5 mm which changed the mass resolution by 5%. Shifting the quadrupole by 0.5 mm in the x-direction changes the mass resolution by 5%. We used this command to shift quadrupole 3 up by 5 mm which changed the mass resolution by 5%. Shifting the quadrupole by 0.5 mm in the x-direction changes the mass resolution by 5%.
  
-We can use the TA command to do rotations about the x and y axes. This has the same syntax as SA. +We can use the TA command to rotate the quad about the x and y axes. This has the same syntax as SA. 
-Rotating about x-axis .05° changes the mass resolution by 5%. Rotating about y-axis .15° changes the mass resolution by 5%.+Rotating about the x-axis by .05° changes the mass resolution by 5%. Rotating about the y-axis by .15° changes the mass resolution by 5%.
  
 To determine how much roll is allowed before changing the mass resolution by 5%, we use the RA command which takes one angle and rotates about the z-axis. An angle 0f 2.3° is allowed. To determine how much roll is allowed before changing the mass resolution by 5%, we use the RA command which takes one angle and rotates about the z-axis. An angle 0f 2.3° is allowed.
  
/srv/thewikis/JIOSS/data/attic/bam_group.1536889236.txt.gz · Last modified: 2018/09/13 21:40 by hamaker

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