Highlights of What’s New in Version 34.0, 31 October 2017

Here is a summary of what’s changed since release 33.1.1.

A bug in the IONEFFECTS element was reported by J. Cavley (APS): when only one bunch was present, the electron beam coordinates were zeroed out.
A bug in the WATCH element caused elegant to crash in centroid and parameter mode when the WATCH element was in a beamline branch that did not get executed on the first pass.
In multi-step runs, the STEERING_MULTIPOLES input for the EKICK, EHKICK, and EVKICK elements was ignored except on the first step.

A bug in the ion_effects command was reported by J. Cavley (APS): when only one bunch was present, the electron beam coordinates were zeroed out.
The center_arrival_time feature of sdds_beam did not work correctly for the parallel version, as reported by Jonas Björklund.
The use_moments_output_values qualifier of the bunched_beam command did not work for the parallel version.
The full_grid_output mode of the frequency_map command provided incorrect results for the diffusion for particles that got lost.
The parameters output file from the run_setup command incorrectly reported the length and angle of CSBEND elements when element division was invoked. This was reported by V. Sajaev (APS).
The amplification_factors command now respects link_elements commands.
The tune_footprint command now optionally runs in major action command mode. The inability to do so was pointed out by Y.-P. Sun (APS).

The long-deprecated DIRECTION parameter of the SCRAPER element has been removed; input files using the SCRAPER element will need to be updated to remove this parameter and replace it with equivalent INSERT_FROM parameter. One result is that the SCRAPER element can now support two-sided scrapers.
Added the SYSTEMATIC_MULTIPOLE_FACTOR, RANDOM_MULTIPOLE_FACTOR, and STEERING_MULTIPOLE_FACTOR parameters to the KQUAD, KSEXT, and KOCT elements. These allow multiplying each of the indicated higher multipole contributions by a factor.
Added YAW and YAW_END parameters to UKICKMAP element. It’s useful in simulating canted insertion devices.
Added the SPEEDBUMP element, which provides a new kind of aperture formed by a semi-circular bump protruding from one or both sides of the chamber.
Added the DX, DY, and DZ misalignment parameters to the EHKICK, EVKICK, and EKICK elements. Also added RANDOM_MULTIPOLES parameter.

Added the inelastic_scattering command, which assists in computation of the inelastic gas scattering lifetime and the distribution of lost particles. This is only available in the parallel version.
Added the generation_interval parameter to the ion_effects command to permit generation of ions only at every n^th bunch. This was suggested by J. Calvey (APS).
Added the ignore_elements command, which allows instructing elegant to ignore specified elements in tracking. This can reduce overhead from “do-nothing” elements like markers and monitors.
The link_elements command can now create the source element name by editing the target name.
The momentum_aperture command now uses resources more efficiently for the parallel version when output_mode=2. In particular, it honors the user-provided minimum δ values. In addition, the domain decomposition was revised to better equalize the workload of the processors.

Added the inelasticScatteringAnalysis script, a companion to the inelastic_scattering command in Pelegant. It allows computing the lifetime and local loss rates from inelastic gas scattering.