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Add GSI space charge benchmark lattice #393

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@cemitch99 cemitch99 commented Jun 29, 2023

Added the lattice used for space charge benchmarks described here:
http://web-docs.gsi.de/~giuliano/research_activity/trapping_benchmarking/main.html

  • The beam parameters need to be double-checked. Add additional RF element.
  • Implement first for a 2.5D space charge solver?

cemitch99 and others added 5 commits June 28, 2023 14:55
- Modified the initial beam size in the IOTA lens benchmark example.
- Added 2 benchmarks of 3D space charge for initial testing.
- Add documentation for 2 benchmarks with space charge.
- Add a benchmark example with space charge and periodic s-dependent focusing.
- Added an s-dependent example using a Kurth beam without space charge.
- Modified tolerance for IOTA lens benchmark example.
  Reduced tolerance to account for smaller initial beam size and
  improved preservation of invariants of motion.
- Modified tolerances of space charge examples to allow CI tests to
  pass when space charge is not active.

- Modified tolerance for space charge examples.
  These should fail unless space charge is turned on.
Selected numerical values for amr.n_cell, lattice.nslice, and geometry.prob_relative.
This is not part of this pull request.
@ax3l ax3l requested review from ax3l and qianglbl June 30, 2023 17:28
@ax3l ax3l added component: space charge Space charge & potential solver component: tests examples, tests and benchmarks labels Jun 30, 2023
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