Xtrack version 0.57.0

Changes:

• Introduce more compact json format (parameters equal to defaults are not stored)
• Slicing done with slice-elements referring to the parent. Parent element can be updated also after the slicing and slice elements are updated accordingly. As a result no expression is generated when slicing an element.
• Introduced Replica class to have multiple instances of the same element.
• Element lengths and magnet strengths correctly extracted for replicas and slices in Line.attr, Line.get_table() and Line.twiss().
• Introduced shift_x, shift_y and rot_s_rad properties to all elements in order to introduce misalignments.
• Introduced aperture associated to an element. If present, this is taken into account when slicing the element.
• TwissTable.reverse() reverses also the magnet strengths.
• More efficient and general survey (vertical bends are correctly handled).
• Rationalize element insertion (uses slicing capabilities).
• Removed only_markers flag in twiss.
• Removed element compounds (superseded by capabilities described above).

Full Changelog: v0.56.1...v0.57.0

Xtrack version 0.56.1

Changes:

• Fix in test

Full Changelog: v0.56.0...v0.56.1

Xtrack version 0.56.0

Changes:

• Add missing elements to prebuilt kernels.
• Better estimation of damping partition numbers in twiss.

Full Changelog: v0.55.0...v0.56.0

Xtrack version 0.55.0

Changes:

• Add interface to RF Track.
• Add "absolute time" mode to RFCavity.
• Add time synchronization capability for simulation of coasting beams.
• Add radiation in solenoids.
• Add ax, ay coordinates and x_prime, y_prime properties for easier extraction of angles in solenoids.
• Add TargetRmatrix for the matching of R-matrix terms over a section of a beam line.
• Add search_for_trev mode in twiss.
• Handle bv flag in MAD-X loader.
• Switch to exact drift as fallback in solenoid with zero strength.

Full Changelog: v0.54.2...v0.55.0

Xtrack version 0.54.2

Changes:

• Add a missing kernel for aperture interpolation.
• Unless skipping reorganisation of particles, on OpenMP only make batches with alive particles.
• Move particles api test from xpart to xtrack.

Full Changelog: v0.54.1...v0.54.2

Xtrack version 0.54.1

Changes:

• Fixes for prebuilt kernels attached to elements.
• Respect the priority of prebuilt kernels according to the order they are defined.

Full Changelog: v0.54.0...v0.54.1

Xtrack version 0.54.0

Changes:

• Add examples for adding tilt or shifts on compound elements.
• Add capability of reinitializing io_buffer when logging is stopped.
• Add capability to cut a thick line at specific s position (Line.cut_at_s).
• Introduce Custom slicing strategy.
• Introduce Line.to_madx_sequence() and Line.to_madng().
• Introduce Quadrupole(..., k1s, ...), Octupole.
• Multispecies tracking supported for Drift, Bend, Quadrupole, Sextupole, Octupole, Multipole, RFCavity, DipoleEdge .
• Fix YRotation (beta confused with beta0).
• Moved Particles class from Xpart to Xtrack.
• Removed ParticlesPurelyLongitudinal.
• Use Jacobian to search closed orbit.
• Add Xcoll elements to prebuilt.

Full Changelog: v0.52.0...v0.54.0

Xtrack version 0.52.0

Changes:

• Introduce Line.transform_compound(...) method to introduce tilt and shifts of elements
• Introduce computation of transverse momentum crab dispersion (dpx_zeta, dpy_zeta).
• Fix in Line.optimize_for_tracking(...) for lines embedded in Multiline objects.
• Fix in twiss for calculation of chromatic properties of line portions.
• Fix in import of Octagon elements form MAD-X.

Full Changelog: v0.51.1...v0.52.0

Xtrack version 0.51.1

Changes

• Add possibility to log variables and other quantities at each turn.
• Add possibility to extract a view on the merit function from Optimize objects
• Adapt to updated nafflib.

Full Changelog: v0.51.0...v0.51.1

Xtrack version 0.51.0

Changes:

• Second order dispersion and second order chromaticity added to twiss result.
• Add chromatic properties to allowed keyword arguments for optimization targets.
• Search for off-momentum closed orbit when computing chromatic properties in twiss.
• Closed orbit search performed with Jacobian optimizer instead of numpy fsolve.
• Possibility to use the optimizer on a generic callable.
• Implement solenoid backtrack.

Full Changelog: v0.50.1...v0.51.0