Variable energy constant current accelerator structure

Patent · Wed Jul 13 04:00:00 EDT 1988

OSTI ID:6234050

Anderson, O. A.

A variable energy, constant current ion beam accelerator structure is disclosed comprising an ion source capable of providing the desired ions, a pre-accelerator for establishing an initial energy level, a matching/pumping module having means for focusing means for maintaining the beam current, and at least one main accelerator module for continuing beam focus, with means capable of variably imparting acceleration to the beam so that a constant beam output current is maintained independent of the variable output energy. In a preferred embodiment, quadrupole electrodes are provided in both the matching/pumping module and the one or more accelerator modules, and are formed using four opposing cylinder electrodes which extend parallel to the beam axis and are spaced around the beam at 90/degree/ intervals with opposing electrodes maintained at the same potential. 12 figs., 3 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• Assignee: Dept. of Energy
• Patent Number(s): PATENTS-US-A7218390
• Application Number: ON: DE89011438
• OSTI ID: 6234050
• Country of Publication: United States
• Language: English

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ACCELERATORS
BEAM CURRENTS
BEAM INJECTION
BEAM TRANSPORT
BEAMS
CONFINEMENT
CURRENTS
DESIGN
ENERGY LEVELS
INVENTIONS
ION BEAMS
ION IMPLANTATION
ION SOURCES
NEUTRAL ATOM BEAM INJECTION
PLASMA CONFINEMENT