title: Determination of the virtual electron source of a betatron.
abstract: The definition and use of the virtual source point of an electron beam are discussed and a new method of measuring the virtual source point using a multi-pinhole camera is described. Application examples are given for a 42 MeV betatron.
mesh_terms: D003201:Computers; D004583:Electrons; D006801:Humans; D010315:Particle Accelerators; D010347:Patient Care Planning / Q000379:methods; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy / Q000379:methods