diff --git a/docs/source/dataanalysis/dataanalysis.rst b/docs/source/dataanalysis/dataanalysis.rst index cc170b57a..96e1f5c6f 100644 --- a/docs/source/dataanalysis/dataanalysis.rst +++ b/docs/source/dataanalysis/dataanalysis.rst @@ -16,6 +16,9 @@ For data analysis of openPMD data, see examples of `many supported tools, Python See also `WarpX' documentation on openPMD `__. +At each monitor, the output for every particle in the beam is provided. This includes the 6 canonical phase space variables (x [m], px, y[m], py, t[m], pt), where each coordinate is measured +relative to the reference particle, in the local moving frame. See the section :ref:`Coordinates and Units ` for additional details. + .. _dataanalysis-monitor-refparticle: Additional Beam Attributes @@ -62,7 +65,7 @@ Reduced Beam Characteristics ---------------------------- ImpactX calculates reduced beam characteristics based on the beam moments during runtime. -These include averaged positions, momenta, beam emittances and Courant-Snyder (Twiss) parameters. +These include averaged positions and momenta, as well as beam emittances and Courant-Snyder (Twiss) parameters. For computing beam moments (as elsewhere), positions and momenta are given as deviations with respect to the reference particle (see :ref:`Coordinates and Units `). The reduced beam characteristics are stored with the output of the beam monitor element.