Ferrite tuner example   
Six ferrite blocks:    Material 2, Epsilon = 14.5, Mu = 1.5
Five ceramic-spacers:  Material 4, Epsilon = 10.0, Mu = 1.0
Ceramic vacuum window: Material 3, Epsilon =  9.0, Mu = 1.0
Initialize one large ferrite block, then superimpose ceramic spacers
[Originally appeared in 1987 Reference Manual C.12.2]

; Copyright 1987, by the University of California. 
; Unauthorized commercial use is prohibited. 

&reg kprob=1,              ! Superfish problem
icylin=1                   ! Cylindrical symmetry
freq=57.76775,             ! Starting frequency 
dslope=-1,                 ! Allow convergence after one iteration
xreg1=94.0,                ! X line region
kreg1=188,                 ! Logical coordinate for XREG1
yreg1=8,yreg2=9,           ! Y line regions
yreg3=13,yreg4=17.5
lreg1=12,lreg2=15,         ! Logical coordinates for YREGs
lreg3=21,lreg4=31,
kmax=260,lmax=43 &         ! Maximum X and Y logical coordinates

&po x=0.0,y=0.0 &
&po x=116.88,y=0.0 &
&po x=116.88,y=8.0 &
&po x=5.0,y=8.0 &
&po x=5.0,y=9.0 &
&po x=96.64,y=9.0 &
&po x=116.88,y=13.0 &
&po x=116.88,y=25.0 &
&po x=96.64,y=25.0 &
&po x=96.64,y=14.0 &
&po x=95.64,y=13.0 &
&po x=93.0,y=13.0 &
&po x=85.0,y=17.5 &
&po x=0.0,y=17.5 &
&po x=0.0,y=0.0 &

&reg mat=2 &            ; Ferrite region
&po x=96.64,y=16.0 &
&po x=96.64,y=25.0 &
&po x=116.88,y=25.0 &
&po x=116.88,y=16.0 &
&po x=96.64,y=16.0 &


&reg mat=3 &            ; Ceramic vacuum window region
&po x=96.64,y=14.0 &
&po x=116.88,y=14.0 &
&po x=116.88,y=14.75 &
&po x=96.64,y=14.75 &
&po x=96.64,y=14.0 &

&reg mat=4 &            ; First ceramic-spacer region
&po x=99.18,y=16.0 &
&po x=100.18,y=16.0 &
&po x=100.18,y=25.0 &
&po x=99.18,y=25.0 &
&po x=99.18,y=16.0 &

&reg mat=4 &            ; Second ceramic-spacer region
&po x=102.72,y=16.0 &
&po x=103.72,y=16.0 &
&po x=103.72,y=25.0 &
&po x=102.72,y=25.0 &
&po x=102.72,y=16.0 &

&reg mat=4 &            ; Third ceramic-spacer region
&po x=106.26,y=16.0 &
&po x=107.26,y=16.0 &
&po x=107.26,y=25.0 &
&po x=106.26,y=25.0 &
&po x=106.26,y=16.0 &

&reg mat=4 &            ; Fourth ceramic-spacer region
&po x=109.80,y=16.0 &
&po x=110.80,y=16.0 &
&po x=110.80,y=25.0 &
&po x=109.80,y=25.0 &
&po x=109.80,y=16.0 &

&reg mat=4 &            ; Fifth ceramic-spacer region
&po x=113.34,y=16.0 &
&po x=114.34,y=16.0 &
&po x=114.34,y=25.0 &
&po x=113.34,y=25.0 &
&po x=113.34,y=16.0 &

; These MT namelists will be numbered 2, 3, and 4 by AUTOMESH.
; The numbers correspond to MAT numbers is the REG namelists.

&mt epsilon = 14.5, mu = 1.5 &

&mt epsilon = 9, mu = 1   &

&mt epsilon = 10, mu = 1 &