New and Modified Elements

• Improved the ZTRANSVERSE and ZLONGIT elements, which provide simulation of transverse and longitudinal impedances. The improved version features automatic adjustment of number of bins and bin size for broad-band impedances. This prevents unphysical results in the simulation. This was inspired by an example input file sent by Y. Hao (BNL). On a related note, the manual page for ZTRANSVERSE was updated to fix errors and add a discussion of preparing impedance input.

• Added end-pass control for the WATCH element. Hence, one can now specify the pass on which to start and end logging of data.

• Added end-pass control for the DSCATTER element. Hence, one can now specify the pass on which to start and end scattering.

• The KQUAD and KSEXT elements now include internal apertures. These may result from the existing MAXAMP element, or from the new aperture_input command (see below). This was inspired by a discussion with R. Bartolini (DLS).

• A simple linear transverse space-charge model is available using the SCMULT element. This was implemented by A. Xiao (ANL). One simply inserts one or more SCMULT elements into the lattice, along with a CHARGE element to specify the beam charge.

• Added second-order matrices to the RFCA element in non-body-focus mode. This issue was raised by E. Prat. This improves computation of dispersion due to a corrector in a linac. Note, however, that if body-focusing is used, only the first-order matrix is available.