Xtrack version 0.19.4

Changes:

• Update following method rename in xobjects
• Line.from_dict significantly faster following xobject optimisation

Xtrack version 0.19.2

Changes:

• Handle local_particle_src in a way that is compatible with python multithreading

Xtrack version 0.19.1

Changes:

• Rename CustomSetter to MultiSetter.
• Fix in mad_loader (import of crabcavity element)

Xtrack version 0.19.0

Changes:

• Introduced CustomSetter class to simultaneously apply changes to a large number of element properties

Xtrack version 0.18.0

Changes:

• Introduce e-lens with arbitrary radial profile.
• Subtract arbitrary dipolar kick in wire beam element.
• Introduce LongitudinalLimitRect beam element.
• Make effective quantum radiation robust against dynamic beta.
• Element-by-element monitor now saves value at the end of the line.
• Tracker.twiss computes values at the end of the line (solves issues with tune computation when the last element is a drift). Added input flag values_at_element_exit to get optionally get values at the exit of the elements.
• More efficient implementation of Line.copy.
• Fixed issue with repeated names in Line.to_dict.
• Option inplace=False is not anymore allowed in Line.remove_inactive_multipoles, LIne.remove_zero_length_drifts, Line.merge_consecutive_drifts and Line.merge_consecutive_multipoles. User should explicitly make a copy of the line before the simplification steps.
• Further development of pipelined multibunch simulation capabilities, in view of strong-strong beam beam simulations.

Xtrack version 0.17.0

Changes:

• Rewritten mad_loader, new features:
  • Improved import of MAD-X expressions
  • Import of tilt and offsets for elements and apertures from MAD-X elements and error tables
• Introduced Line.to_pandas and Line.check_aperture methods
• Introduced flag to skip loss location refinement for certain element classes, e.g. collimators

Xtrack version 0.16.2

Changes:

• Introduced mechanism to pass custom headers to Tracker
• Introduced compilation flag to disable radiation in Multipole at compile time (beneficial for performance)

Xtrack version 0.16.1

Changes:

• Refactored BeamElement class and metaclass to remove duplicated code and features from xobjects.HybridClass.
• Kernel declarations can be provided through the _kernel dictionary when subclassing BeamElement.
• Additional dependencies from xobjects types can be specified through the _depends_on list when subclassing BeamElement.
• Adapted to new Xobjects API (C source code provided in _extra_c_sources inside class declaration, _move_to renamed to move, XoStruct renamed to _XoStruct).
• Renamed per_particle_kernels to _per_particle_kernels.
• LocalParticle API is temporarily appended to the Particles class API just before compiling the track kernels. It is removed right after the compilation.

Xtrack version 0.16.0

Changes:

• Removed dress_element function. Now there is only one mechanism to create beam elements which is to inherit from the BeamElement class.
• Across the package xobjects.DressedStruct has been replaced with xobjects.HybridClass following update in xobjects.
• Introduced pipeline features (preparation for strong-strong beam beam simulations):
  • Collective elements can put the tracking on hold;
  • Tracker handles the hold condition and can resume the tracking when the Tracker.resume method is called;
  • Introduced PipelineMultitracker objects to handle multiple ongoing tracking sessions.
• Introduced custom per-particle kernels attached to beam elements.
• Regenerated all json files in test_data folder following refactoring of beam-beam classes in xfields.
• Introduced _arr2ctx internal method to transfer arrays to context if needed.
• extra_sources are now specified as member of the BeamElement class and not attached a posteriori to the XoStruct as done before.
• Adapted ducktrack to setup beam-beam elements from dictionaries produced with he new data structure implemented in xfields.

Xtrack version 0.15.0

Changes:

• knl and ksl stored directly in Multipole and RFMultipole data structures (instead of bal). Improves significantly the speed when these are changed dynamically in the simulation.
• Restored set of canonically conjugate variables in R matrix, now using (x, px, y, py, zeta, pzeta)