Variable energy constant current accelerator structure

Patent · Tue Mar 27 04:00:00 EST 1990

OSTI ID:6722601

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{degrees} intervals with opposing electrodes maintained at the same potential.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4912421; A
• Application Number: PPN: US 7-218390A
• OSTI ID: 6722601
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430301* -- Particle Accelerators-- Ion Sources
BEAM DYNAMICS
DESIGN
FOCUSING
ION SOURCES