Nozzle Geometry Optimization for High-Current Aluminum Ion Beam Acceleration via Direct Plasma Injection Scheme
Year: 2026
Type: other
Abstract: We report the generation of a record aluminum ion beam current exceeding 58 mA at the Al11+ charge state, accelerated to an energy of 5.5 MeV using the direct plasma injection scheme (DPIS), which integrates a laser ion source (LIS) with a radio-frequency quadrupole (RFQ) accelerator. The effect of nozzle geometry on beam extraction was systematically investigated using 8 mm and 12 mm tapered designs and an 18 mm cylindrical configuration. The 18 mm nozzle achieved the highest Al11+ beam current, while the 12 mm aperture provided a favorable balance between beam intensity and current density. Beam extraction simulations confirmed effective RFQ matching across multiple charge states, and solenoidal field tuning further enhanced plasma collimation. This work not only establishes a new benchmark for high-current ion beam generation but also provides a fundamental understanding of plasma-beam interface dynamics crucial for the next generation of high-intensity particle accelerators, particularly those employing LIS-RFQ systems.
Source: AIP Publishing
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7140035732