Simulation of heavy ion fusion beams

Conference · Fri Jul 10 00:00:00 EDT 1992

OSTI ID:10154544

Friedman, A; Barnard, J J; Callahan, D A; Caporaso, G J; Chen, Y J; DeFord, J F; Grote, D P; Hewett, D W; Ho, D D.M.; Langdon, A B; Payne, A N; Shang, C C; Sharp, W M; Shay, H D ^[1]; Fawley, W M; Hahn, K D; Henestroza, E; Lee, E P; Smith, L; Yu, S S ^[2] ; Haber, I ^[3]

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1. Lawrence Livermore National Lab., CA (United States)
2. Lawrence Berkeley Lab., CA (United States)
3. Naval Research Lab., Washington, DC (United States)

Beams of heavy ions generated by induction accelerators represent the principal driver approach in the US Office of Fusion Energy`s Inertial Fusion Energy program. The technology appears to be well suited to the requirements of power production, enjoying advantages of efficiency, durability, repetition rate, and survivability of final optics. However, for inertial fusion applications the current is well above that found in conventional high energy physics accelerators, and the beams must be viewed as collisionless, non-neutral plasmas, confined by applied magnetic and electric fields. These space-charge-dominated beam-q must be focused onto small spots at the fusion target and so preservation of a small emittance is crucial. The nonlinear beam self-fields can lead to emittance growth, especially when the beam undergoes many manipulations, which may include: Transport through bends and imperfectly aligned focusing elements, non-steady acceleration, insertion into rings, merging, and splitting. Furthermore, beam formation and injection, and transport through the target chamber, are inherently plasma processes. Thus, a self-consistent field description is generally needed. Because of the beams` low plasma frequencies and short residence times, particle-in-cell techniques are particularly effective. This paper describes the variety of simulation techniques and codes used to model Heavy Ion Fusion beams. These range from simple envelope equation models to elaborate fluid and discrete-particle simulations in 1d, 2d and 3d. The Induction Linac Systems Experiments (ILSE) facility and experimental sequence proposed by the Lawrence Berkeley Laboratory has become the main thrust of the US program. We describe the simulation tools being applied to ILSE and to advanced accelerators, including recirculating induction accelerator concepts. We also describe the codes used to model beam sources and injectors, final focus, chamber transport, and interactions with the target corona.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Department of Defense, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48; AC03-76SF00098
• OSTI ID: 10154544
• Report Number(s): UCRL-JC-110193; CONF-9206235-6; ON: DE93012578
• Resource Relation: Conference: International Atomic Energy Agency (IAEA) technical committee meeting on advances in simulation and modeling of thermonuclear plasmas,Montreal (Canada),15-17 Jun 1992; Other Information: PBD: 10 Jul 1992
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
43 PARTICLE ACCELERATORS
HILACS
COMPUTERIZED SIMULATION
HEAVY ION FUSION REACTIONS
INERTIAL CONFINEMENT
BEAM EMITTANCE
BEAM TRANSPORT
ION BEAMS
ION SOURCES
SPACE CHARGE
BEAM INJECTION
TARGET CHAMBERS
BEAM DYNAMICS
700411
430100
INERTIAL CONFINEMENT DEVICES
DESIGN, DEVELOPMENT, AND OPERATION