Fix bunch size calc within space charge calc. (bmad-sim#1355)

Author: DavidSagan

bmad/multiparticle/beam_utils.f90

@@ -1412,6 +1412,9 @@ subroutine calc_bunch_params (bunch, bunch_params, error, print_err, n_mat, is_t
 if (bunch_params%n_particle_live < 6) return
 
 call calc_emittances_and_twiss_from_sigma_matrix (bunch_params%sigma, bunch_params, error, print_err, n_mat)
+if (error .and. logic_option(.true., print_err)) then
+  call out_io(s_blank$, r_name, 'This at element: ' // ele_full_name(ele))
+endif
 
 end subroutine calc_bunch_params
 

bmad/space_charge/space_charge_mod.f90

@@ -215,8 +215,12 @@ subroutine sc_step(bunch, ele, include_image, t_end, sc_field, n_emit)
 
 ! Calculate space charge field
 if (space_charge_com%particle_sigma_cutoff > 0) then
-  call calc_bunch_params(bunch, bunch_params, error, is_time_coords=.true., ele=ele)
-  call sc_field_calc(bunch, ele%branch, include_image, t_end, sc_field, bunch_params)
+  call calc_bunch_params(bunch, bunch_params, error, .false., is_time_coords=.true., ele=ele)
+  if (error) then
+    call sc_field_calc(bunch, ele%branch, include_image, t_end, sc_field)
+  else
+    call sc_field_calc(bunch, ele%branch, include_image, t_end, sc_field, bunch_params)
+  endif
 else
   call sc_field_calc(bunch, ele%branch, include_image, t_end, sc_field)
 endif

tao/code/tao_show_this.f90

@@ -293,7 +293,7 @@ subroutine tao_show_this (what, result_id, lines, nl)
   zb = -1
 
   do 
-    call tao_next_switch (what2, [character(16):: '-universe'], .true., switch, err)
+    call tao_next_switch (what2, [character(16):: '-universe', '-lattice', '-comb', '-z'], .true., switch, err)
     if (err) return
     if (switch == '') exit
 
@@ -357,7 +357,7 @@ subroutine tao_show_this (what, result_id, lines, nl)
     return
   endif
 
-  if (what_to_show == '-comb' .and. ele_name == '') then
+  if (what_to_show == '-comb' .and. ele_name == '') then   ! -comb used without comb index.
     if (.not. allocated(tao_branch%bunch_params_comb)) then
       nl=nl+1; lines(nl) = 'Beam parameter comb not calculated (check comb_ds_save)' 
       return
@@ -445,6 +445,9 @@ subroutine tao_show_this (what, result_id, lines, nl)
     nl=nl+1; write(lines(nl), amt)  'dump_at           = ', quote(u%beam%dump_at)
     nl=nl+1; write(lines(nl), amt)  'dump_file         = ', quote(u%beam%dump_file)
     nl=nl+1; write(lines(nl), rmt3) 'comb_ds_save      = ', tao_branch%comb_ds_save, '  ! Note: -1 => Use (latice branch length)/plot_page%n_curve_pts'
+    if (allocated(tao_branch%bunch_params_comb)) then
+      nl=nl+1; write(lines(nl), amt)  'comb index range  = [0, ', int_str(tao_branch%bunch_params_comb(1)%n_pt), ']'
+    endif
 !!!!    nl=nl+1; write(lines(nl), rmt) 'comb_max_ds_save  = ', tao_branch%bunch_params_comb(1)%max_ds_save
     nl=nl+1; write(lines(nl), amt)  'track_start       = ', quote(bb%track_start), '  ! ', ele_full_name(branch%ele(bb%ix_track_start))
     nl=nl+1; write(lines(nl), amt)  'track_end         = ', quote(bb%track_end),   '  ! ', ele_full_name(branch%ele(bb%ix_track_end))

tao/version/tao_version_mod.f90

@@ -6,5 +6,5 @@
 !-
 
 module tao_version_mod
-character(*), parameter :: tao_version_date = "2024/12/22 21:46:37"
+character(*), parameter :: tao_version_date = "2025/01/07 00:41:27"
 end module