Add thin nonlinear plasma lens with transverse taper #562
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- 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.
Not part of this PR
Eliminate unused variables.
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ax3l
reviewed
Apr 16, 2024
ax3l
reviewed
Apr 16, 2024
Restore assignment of xout, yout, tout
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sigma -> lambda update
sigma -> lambda update (C++ input)
Provide a large tolerance until target values are updated.
ax3l
reviewed
Apr 29, 2024
Co-authored-by: Axel Huebl <[email protected]>
Add energy spread value to README.
Merged
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Added a thin nonlinear plasma lens with transverse (horizontal) taper, as described by C. Lindstrøm. Namely:
where$g$ is the (linear) field gradient in T/m and $D_x$ is the targeted horizontal dispersion in m.
Inputs:
k = integrated focusing strength ( = g ds or g ds / Brho, depending on the choice of units)
taper = taper parameter = 1/Dx