ELECTRON BEAM RADIATION SYSTEM USEFUL FOR THERAPEUTIC APPLICATIONS

The invention refers to an electron beam radiation system useful to irradiate a target site with electron beam radiation dose having an adjustable penetration depth, said system comprising:a. an electron beam directed at the target site, said electron beam having an adjustable and controllable electron beam energy adjusted to correspond to a desired penetration depth; andb. a feedback system configured to stabilize the penetration depth of a linearly accelerated, straight through electron beam having an electron beam energy, said system providing a control signal derived from a plurality of sensed electron beam characteristics that in combination correlate to the electron beam energy; andc. wherein the penetration depth is adjusted by presenting selected absorbers of a library of electron beam absorbers configured to provide stepwise tuning of an electron beam in increments of 2 mm or less, wherein at least one electron beam absorber is presented to the electron beam in a manner to reduce the electron beam energy to control the penetration depth of the electron beam dose delivered to the target and/or the penetration depth is adjusted by electronically changing the machine configuration to tune the electron beam energy.