I am studying space-charge effects in rings and would appreciate your advice on a surprising result from an element-by-element tracking test.
I attached the input file that shows how I set up the simulation. In the run I apply a space-charge kick at every quadrupole (element-by-element tracking). For the test I used a flat beam with horizontal emittance emitx=20 pm, and vertical emittance emity=2 pm. I therefore expected stronger emittance growth in the vertical plane.
With a bunch charge of 7.6 nC the attached figure shows the result: contrary to my expectation, the horizontal emittance starts to increase first and more rapidly.
- sc_res.png (6.01 KiB) Viewed 201 times
Yours Chao