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[Opal] OPAL Dispersion Issues

Chronological Thread 
  • From: Ryan Roussel <roussel AT>
  • To: "opal AT" <opal AT>
  • Subject: [Opal] OPAL Dispersion Issues
  • Date: Tue, 10 Apr 2018 21:43:26 +0000

Hello all,
I am having difficulty obtaining correct physical results with OPAL-T involving dipole magnets. I have attached the relevant files.

The beamline is a single dogleg with two equal strength bend magnets. The issue I am seeing is in the calculation of the dispersion function and the final particle distribution. The dispersion contribution from the first dipole magnet is orders of magnitude lower than what it should be, while the second dipole contributes something reasonable. On the other hand the particle phase space distribution between the dipoles looks correct for a dispersion section but the final particle distribution after the second dipole looks incorrect as it is not symmetrical. 

Note: My graph x-axes have been cut off for some reason both labels are z(m).

Any help on this issue would be greatly appreciated.
Ryan Roussel

Attachment: ref_traj.png
Description: PNG image

Attachment: disp.png
Description: PNG image

Description: Binary data

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