An example particle accelerator includes the following: a voltage source to provide a radio frequency (RF) voltage to a cavity to accelerate particles from a plasma column, where the cavity has a magnetic field causing particles accelerated from the plasma column to move orbitally within the cavity； an extraction channel to receive the particles accelerated from the plasma column and to output the received particles from the cavity； and a regenerator to provide a magnetic field bump within the cavity to thereby change successive orbits of the particles accelerated from the plasma column so that, eventually, particles output to the extraction channel. The magnetic field is at least 6 Tesla and the magnetic field bump is at most 2 Tesla.本發明揭示一種實例性粒子加速器，其包含以下各項：一電壓源，其用以提供一射頻(RF)電壓至一腔以使粒子自一電漿柱加速，其中該腔具有致使自該電漿柱加速之粒子在該腔內沿軌道移動之一磁場；一提取通道，其用以接收自該電漿柱加速之該等粒子且用以輸出來自該腔之該等所接收粒子；及一再生器，其用以在該腔內提供一磁場突增以藉此改變自該電漿柱加速之該等粒子之連續軌道以使得最終粒子輸出至該提取通道。該磁場係至少6特斯拉(Tesla)且該磁場突增係至多2特斯拉。
