Beam charge and current neutralization of high-charge-state heavy ions

Conference · Wed Oct 29 00:00:00 EST 1997

OSTI ID:633961

Logan, B G; Callahan, D A

High-charge-state heavy-ions may reduce the accelerator voltage and cost of heavy-ion inertial fusion drivers, if ways can be found to neutralize the space charge of the highly charged beam ions as they are focused to a target in a fusion chamber. Using 2-D Particle-In- Cell simulations, we have evaluated the effectiveness of two different methods of beam neutralization: (1) by redistribution of beam charge in a larger diameter, preformed plasma in the chamber, and (2), by introducing a cold-electron-emitting source within the beam channel at the beam entrance into the chamber. We find the latter method to be much more effective for high-charge-state ions.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 633961
• Report Number(s): UCRL-JC-127486; CONF-9709166-; ON: DE98051487; TRN: 98:009123
• Resource Relation: Conference: 12. international symposium on heavy ion inertial fusion, Heidelberg (Germany), 17-27 Sep 1997; Other Information: PBD: 29 Oct 1997
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
COMPUTERIZED SIMULATION
BEAM NEUTRALIZATION
HEAVY ION ACCELERATORS
TWO-DIMENSIONAL CALCULATIONS
ELECTRON SOURCES
PLASMA