Highlights of What’s New in Version 2020.2

Here is a summary of what’s changed since release 2020.1. Historical change logs are collected in Section 13.

The CSRDRIFT element was not including longitudinal space charge as requested when CSR effects were turned off. This was reported by Y. Park (UCLA).

The parameters file created by the run_setup command had negative values for certain drift lengths when backtracking was used. This was reported by Y. Park (UCLA).

Added MIN_NORMAL_ORDER, MAX_NORMAL_ORDER, MIN_SKEW_ORDER, and MAX_SKEW_ORDER to the KQUAD, KSEXT, and CCBEND elements. This allows easily restricting which systematic and random multipole orders are included without changing the data files.
Added the T_REFERENCE parameter to RFCW, which is useful in backtracking in linacs.

Added the obstruction_data command, which permits specifying obstructions in global coordinates. At present, this is experimental and only enforced inside CSBEND, KQUAD, KSEXT, KOCT, and KQUSE elements, and at the end of elements.
Added the losses_include_global_coordinates to the run_setup command, which allows requesting that the losses file contains global coordinates of lost particles (as opposed to only Frenet-Serret coordinates).
The closed_orbit command now includes a parameter in the output file that indicates if the orbit determination has failed.
Added the rfc_reference_output parameter to the run_setup command, which allows recording the internally-determined reference times for RFCA and RFCW elements. This can be useful in improving backtracking in linacs.
The error_element command now supports using sampled values in an external files as the source for perturbation values.