production dynamics
 &cntrl
  imin=0, irest=1, ntx=5,
  nstlim=5000000, dt=0.002,
  ntc=2, ntf=2,
  cut=10.0, ntb=2, ntp=1, taup=2.0,
  ntpr=1000, ntwx=1000, ntwr=50000,
  ntt=3, gamma_ln=2.0,
  temp0=300.0,
 /


