General Xcoll open points

[freddieknets]

TODO:

• Emittance in elements and colldb should be called nemitt_x gemitt_x etc. Throw warning/errors if still using old naming
• Angles should be ALL in radians, also coll.angle
• CollimatorDatabase should be either line-unaware, or have different databases for different lines (instead of hard-coded b1 and b2)
• We want to use 64-bit random numbers (like RandomUniformAccurate) for normal, exponential, etc
• Need strategy for exact drift vs expanded. We probably want always exact to get correct angles? Also, when skipping a collimator, it should take the same strategy as all other drifts in the line
• jaw_L and jaw_R is CERN jargon! What if x points in the other direction (e.g. transfer line)? Then L is actually R etc
• Allow any s position in colldb
• Finish segments implementation!
• Lossmap:
  • Interpolation: adapt the length calculation to the same system as interpolation=False
  • Plot interpolation=False by using real bin width equal to length of aperture (how to scale up to always view? Use plot points/lines and fill?)
  • Allow plotting multiple loss maps (in overlay or so?)
  • Documentation
  • Lossmap plotting code Bjorn
  • Auto-header in plot
  • Adapt external lossmaps tool to remain compatible and depend on the Xcoll plotting functionality for consistency
  • Currently, losses aper_downstream are moved to the collimator. This should happen for loss on aper_upstream as well! But maybe not if the collimator has limited size?
  • Drastically speed up loading of multiple jsons, and verify they are combined correctly (need test)
• Test longitudinal pencil (Maria)
• Make it easier to change collimator elements in a line (e.g. BlackAbsorber -> EverestCollimator -> TransparentCollimator etc)
• Add tests for TransparentCollimator
• Reversing twiss in assign optics, pencil, .. should be undone. Can we unreverse an existing twiss?
• Fix in aperture warning message if collimator drift has length
• Aperture interpolation failed? => raise error
• Collimator 'class' in environment (protoytpe)
• Materials and tracking:
  • Compare returned particle types (and how many of each) between all scattering code. Are the energy cuts logical/consistent?
  • Investigate which physics processes are accounted for (and which not) in the different scattering codes, at different energies, for different particle types
  • Should materials in collimators be references (to keep memory/file size smaller)? If yes, what with custom materials? What if they are out-of-sync (no longer reproducible)?
• Finish new implementation of accessor
• Finish new implementation of Styled
• Merge hanging changes (currently in release/v0.10.0)
• RFSweep:
  • Should check if frequency=0 and in that case use harmonic
  • Re-implement as beam element, to avoid using time-dependent variables
• Collimator installation is not great: E.g. octupole element gets removed, and aperture is lost instead of taken (see example SPS Lise)
• No need for line.scattering.disable() etc anymore; use new-style Xtrack flags
• Implement new Xtrack headers and compiler macros (instead of comments that will be expanded)
• Dynamic size for InteractionRecord
• Fix jaw_func in BaseCollimator
• Timestamps in copyright headers should be corrected for some files
• Add _K2Collimator for benchmarks etc