Bug Fixes for Elements

• Fixed the units for K3 and K4 parameters on CSBEND and CSRCSBEND.

• Fixed a bug in the low-pass filter function for CSRCSBEND, which may have resulted in noise in the highest frequency bin. (I haven't seen any effect on simulation results.)

• Fixed a bug in the FMULT (file multipole) element implementation. Results were incorrect for non-zero-length elements. Also, now requires both KnL (normal) and JnL (skew) data in the input file.

• Fixed dispersion and path-length terms in the corrector matrix for HKICK, VKICK, and HVKICK. Previous versions used the terms for a sector magnet. In this revision, these terms are computed correctly for a straight reference trajectory and a rectangular magnet. The changes are probably significant only if one had sextupole included in the corrector field.

• Fixed problem with the MATTER elements that occurred with length was exactly a radiation length (there was no scattering!). This bug was discovered by P. Emma (SLAC).

• The BNL parameter of the MULT element has been renamed BTIPL, which is a more accurate description.

• RFTMEZ0 (TM-mode rf cavity from on-axis longitudinal field):'
  • Now allows independent misalignment of cavity and solenoid fields.
  • Added stray magentic fields.
  • Is now active during trajectory correction.

• Twiss parameter computation is now correct when the ROTATE element is used with an angle of 90 or 270 degrees.

• The SREFFECTS element (which simulates lumped quantum excitation and radiation damping in storage rings), now works correctly when $\alpha_x$ or $\alpha_y$ are nonzero.

• The STRAY element (stray fields) now works for tilted beamlines. The matrix for this element is now recomputed before each use to ensure that it is correct, since the beamline momentum may have changed.