PIC simulations of an achromatic solenoidal focusing system for LMF
The nominal 1000 MJ yield of a Laboratory Microfusion Facility (LMF) pellet requires at least a 1.5-meter radius target chamber to contain the blast. A geometry has been identified that uses an annular ion beam with a center plug, has a total transport length of 4 meters, and allows no direct line-of-sight from the target blast to the ion diode. An analytic model for an achromatic, 2-lens system that is capable of transporting a 30 MV, 1 MA Li ion beam over this distance has been developed. The system uses both self-B/sub theta/ and solenoidal magnetic lenses. The beam microdivergence requirement is minimized by locating the final solenoidal lens at the target chamber wall. We have verified the analytic model by PIC transport calculations. A realistic coil system has been designed to supply the required 2 Tesla solenoidal fields. Simulations show that a lithium beam can be transported over the 4 meter distance with better than 70% energy and power efficiency, delivering roughly 1 MJ/beam to the target if a 6 mrad microdivergence is achieved at the diode. 4 refs., 5 figs., 2 tabs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6316854
- Report Number(s):
- SAND-89-0765C; CONF-890335-84; ON: DE89011543
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
ACCELERATOR FACILITIES
BEAM FOCUSING MAGNETS
BEAMS
CHARGED PARTICLES
CONFINEMENT
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC LENSES
ELECTROMAGNETS
EQUIPMENT
FOCUSING
INERTIAL CONFINEMENT
ION BEAM FUSION REACTORS
ION BEAMS
IONS
LENSES
LITHIUM IONS
MAGNETS
PLASMA CONFINEMENT
PLASMA SIMULATION
SIMULATION
TARGET CHAMBERS
THERMONUCLEAR REACTORS
TRAJECTORIES
TRANSPORT THEORY