New Elements

• Added LSCDRIFT, which provides simulation of longitudinal space charge in a drift space, based on an impedance provided by Z. Huang (SLAC).
• Added FRFMODE and FTRFMODE elements. These are similar to RFMODE and TRFMODE, in that they simulate cavity modes. However, FRFMODE and FTRFMODE take the mode data from a file. If there are several modes to be simulated, this is much faster than using several RFMODE or TRFMODE elements.
• Added TFBPICKUP and TFBDRIVER, a pair of elements for simulation of single-bunch transverse digital feedback systems.
• Added FLOOR element for setting floor coordinates inside a beamline. This can be used, for example, to optimize the initial coordinate and direction of a beamline so that it terminates at a required location and direction.
• Added LTHINLENS and LMIRROR elements, which provide modeling of thin lenses and mirrors for light beams.
• Added EMATRIX element, allowing explicit matrix input on the element definition line (instead of in a file as in MATR element). This was suggested by P. Emma (SLAC).