GTF gun
PCRF Gun SN #5
Based on SLAC RF Gun Log 1

&reg kprob=1,       ; Superfish problem
! freq=2856.60,      ; Starting frequency in MHz (pi mode)
 freq=2848.18,      ; Starting frequency in MHz (zero mode)
 dx= .02,            ; Mesh spacing in cm
 xreg= 10.4, 11., 12.,
 yreg= .1,
 lreg= -1, 12,
 lmax= 160,
 mat=1,             ; Material air or vacuum
 nbsrt=0,           ; Right side boundary is Dirichlet (default is 1)
 xdri=6.06044,      ; Drive point in cm
 ydri=4.20856,      ;
 rmass=0.511 &      ; Rest mass energy in MeV

&po x=0.0,y=0. &
&po x=0.,y=4.21819 &
&po x=2.4257,y=4.21819 &
&po x=2.4257,y=2.6875 &
&po nt=2,x0=3.37820,y0=2.6875,a=0.9525,b=1.2025,x=0.9525,y=0. &
&po x=4.3307,y=4.26129 &
&po x=7.73176,y=4.26129 &
&po x=7.73176,y=2.55218 &
&po nt=2,x0=8.68426,y0=2.55218,a=0.9525,b=1.3025,x=0,y=-1.3025 &
&po x=15.0,y=1.24968, &
&po x=15.0,y=0., &
&po x=0.0,y=0. &

!
!A - the iris radius (also beam pipe radius)
!BH - half cell radius
!BF - full cell radius
!
!8MHz balanced: (in meters)
!A     =       0.01449680
!BH    =       0.04199390
!BF    =       0.04259790 
!
!8MHz +15% in half-cell
!A     =       0.01449680
!BH    =       0.04198490
!BF    =       0.04260290
!
!8MHz -15% in half-cell
!A     =       0.01449680
!BH    =       0.04200490
!BF    =       0.04259240