The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

C.S. Debonnel1,2, S.S. Yu2, P.F. Peterson1

(1) Thermal Hydraulics LaboratoryDepartment of Nuclear EngineeringUniversity of California, Berkeley

(2) Accelerator & Fusion Research DivisionLawrence Berkeley National Laboratory

Heavy-Ion Inertial Fusion Virtual National Laboratory

ARIES Meeting, Madison, April 22, 2002

Strategies to Control the Heavy-Ion Beam Line Gas Density and Pressure in the HYLIFE Thick-

Liquid Chamber

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

9x9-beam Hybrid HYLIFE II configuration

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Cut-away view shows beam and target injection paths

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Strategies to Prevent Debris Deposition in the Beam Tubes (I)

• Design efficient target chamber structures

• Mass and energy fluxes at the entrance of beam ports should be as low as possible

• Venting in target chamber has been modeled to determine inlet boundary conditions for the beam tubes

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

The TSUNAMI 2.8.1 Code

•TranSient Upwind Numerical Analysis Method for Inertial confinement fusion

• Provides estimates of the gas dynamics behavior during the venting process in inertial confinement energy systems

• Ideal gas equation (gives conservative results)

• Solves Euler’s equations for compressible flows

• Two-dimensional, axially symmetric pocket

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Axially symmetric 9x9 – Density Contour Plots

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Show Time!

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Axially symmetric 9x9 – Pressure Contour Plots

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Impulse Load on Target-Facing Liquid Structures

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Centerline Beam Port: Integrated Mass Flux

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Centerline Beam Port: Integrated Energy Flux

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Centerline Beam Port: Pressure

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Centerline Beam Port: Velocities

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Key heavy-ion thick-liquid chambers phenomena include gas dynamics and vapor condensation in the

target chamber and in the beam tubes

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Strategies to Prevent Debris Deposition in the Beam Tubes (II)

• Liquid Vortex

• Ablation

• Condensation

• Magnetic sweeper

• Mechanical shutter

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Centerline Beam Port: Density

The Heavy Ion Fusion Virtual National Laboratory

UC Berkeley

Current & Future Work: Gas Transport in Beam Lines

• Detail Geometrical Modeling of Beam Tubes

• Improving the Physics in TSUNAMI:

• Condensation, Evaporation

• Real gas equation

• Radiative Transport