What's New in Version 14.5

Here is a summary of what's changed since version 14.4. For details and references, see the specific entries in the manual.

The following new elements were added:

• The CLEAN element allows removing outlier particles from the beam. This was suggested by Mark Woodley (SLAC).
• The REFLECT element allows reflecting the beam from a perfect mirror, which is very useful for multiple beamline matching. This was suggested by J. Lewellen (ANL).

Improvements to elements:

• The CSRDRIFT element has an additional model that is more rigorous than the previous models. It is based on an extension of the results of Saldin et al. by Gennady Stupakov (SLAC), brought to my attention by Paul Emma (SLAC)
• The CSRCSBEND element now interpolates the wake values, giving smoother results. It also features a new parameter, BLOCK_CSR, which permits blocking CSR from entering drift spaces. This is a handy way to test the impact of drift CSR.
• The MATTER element has an improved scattering model for thin materials and a very crude energy straggling estimation.
• Added tilt, yaw, and pitch misalignment for RFTMEZ0 and MAPSOLENOID elements.

Other features:

• The macro commandline option was added, permitting macro substitution in the input file. This permits running many simulation variants with a single input file.

• The run_setup namelist has a new parameter called element_divisions. This is used to force elegant to split elements into pieces. Each element that results from this splitting becomes a separate element in the lattice.

• The run_setup namelist has a new parameter called search_path, which permits specifying a list of pathnames in which to look for input files. The input files in question include lattice files, particle input, wakefield input, and so on. This allows storing common input files in a convenient location without having to put the location into every filename.