force free spheromak
 &all
 equiltype='ffprime'
 rmax=100.  rzero=110.0 ; minor and major radii--here we have A=1.1
 modelbnd=1 ; use ishape formulation to get boundary
 ishape=5  eshape=1.2 xshape=0.7; ishape=5 is dee shape used for low A
                                ; studies. Try ishape = 4 for rounder dee
                                ; with ishape = 4 ; triang. = sin (xshape)
                                ; with ishape = 5 ; triang. = xshape
 npsi=67  nthet=65         ; mesh size 
 ;  acceptable values are
 ;  npsi=19  nthet=17 
 ;  npsi=35  nthet=33 
 ;  npsi=67  nthet=65 
 ;  npsi=131  nthet=129 
 ;-----pressure profile------------------
 modelp=6 ppcoef=-0.0 0.0   nppcoef=2  ; pprime=0
 ; modelf=3 specifies fprime not ffprime
 modelf=3 ffpcoef=-15.0    nffp=1; fprime
 ;---- magnetic field and total current-----------
 baxis0=-2.e5  ; set toroidal field--rescaled internally for modelf=3
 fixcur=.true.   totcur=5.0e6      ; specify total current that you want
 ;---------------------------------------------------------------------
 betafix="none"     ; do not adjust beta
 ieqdsk=0           ; there is no initial guess from a dskeqi file
 iteqmx=2000  
 toleq=1.e-3	 ; convergence criterion--I almost never change this
 imislo=3 ; sometimes data near axis is garbage--in that case set
           ; imislo=3 to use extrapolation to axis which should 
           ; clean it up--otherwise set imislo=0
 alpsi=-0.99 ; determines the relationship between psic--psi coordinate
           ;  and psiv--psi value=poloidal flux(*2pi)
           ; alpsi=0 makes psic = sqrt(psiv) normalized to 0-1
    ; for alpsi<0
    ; psi_norm(i)=(sin(psic(i)*alpsi*pi*0.5))**2/sin(-alpsi*pi*0.5)**2
    ; idea for alpsi~-1 is to put lots of surfaces near axis and 
    ; near edge
 bavq=0.   bava=0.0   bavxz=0.0  nbavxz=6 ; relaxation parameters
 prtgato=.true.     ; print out a dskgato file
 prtbal=.true.      ; print out a dskbalnew file
 ;nbug = 1
 &end