28 the treatment combination will be selected by the patient using selector switch 21 once the system is powered on via switch 19 and the treatment combination is selected via switch 21 the control circuitry 28 will control switch 27 to deliver the desired pulse or pulse train a two to four position switch 21 can be used to select from the preprogrammed menu the amount of energy stored in the capacitor 26 and to set a corresponding number of energy levels for the magnetic pulse the switch 27 would typically be a solid state controllable switch such as a thyristor that is capable of repeatable switching of a high electrical current in a few microseconds as previously described the coils 18 a and 18 b could have air cores or they could use a magnetically permeable core a sufficiently intense time varying magnetic field pulse must be created that would cause neurons to be depolarized and thereby disrupt the start of a headache for tms the intensity of the magnetic field at the surface of the brain should be between 0 1 and 5 tesla for tcms the intensity of the magnetic field at 1 cm below the surface of the scalp should be between 0 1 and 5 tesla in both cases the pulse width of the magnetic pulse should be approximately between 0 1 and 5 milliseconds the frequency rate of the magnetic pulses if more than one is used should be approximately between 0 1 hz and 500 hz with some patients a single short duration pulse may be all that is required the magnetic pulses can be applied continuously for a period of between 0 1 and 50 seconds by.