Calculation parameters
		Box size in our calculations  [-4, 15]x x [-4, 4]y x [-25, 25]z a.u.
			Grid spacing = 0.2 a.u. supports    EH = - 0.49 a.u.   EHe+= - 1.90 a.u.
	Time Step = 0.06 a.u. Time Range:   ti = - 200.0 a.u. to tf = 200.0 a.u. Projectile Velocity  = 0.1 a.u. xinitial(b,0,-20.0) → xfinal(b,0,20.0)