Conveners
4.1 Fusion (Inertial, Magnetic and Alternate Concepts)
- Adam Sefkow
Double-shell targets, as an additional design for demonstrating and exploring ignition, consist of two concentric shells, a low-Z outer-shell (ablator) surrounding a high-Z inner-shell (pusher) kept in place by a low-density foam. The hydrodynamic instabilities such as Rayleigh-Taylor (RT) and Richtmyer-Meshkov (RM) are especially critical due to the existence of several interfaces, such as...
The volumetric ignition which can substantially reduces the radiation loss requires low threshold temperature and low implosion velocity. Golden double-shell design is one of the volumetric ignition designs. The design consists of two concentric golden shells with the inner shell enclosing a volume filled with DT fuel. The thick inner golden shell can re-radiate the escaped radiation back to...
For the purpose towards to ignition based on Laser inertial confinement fusion(ICF), the traditional indirect drive scheme proposed to create an extremely high hot-spot pressure up to ~350Gbar at stagnation phase and makes it ignited. On the other hand, the high compression ratio implosion(Cr~35) design was necessary while the driven pressure was just around 100Mbar and limited by ~300eV...
The plasma with fusion parameters produced in tokamak, or at the interaction of powerful lasers with matter or z-pinch discharges deals with similar questions, mechanism of generation of high energy beams of charge particles similar to the plasma in solar flares1,2. The plasma generated in plasma focus discharges has some advantages in solving of this problem – convenient parameters for...
Magnetized Liner Inertial Fusion (MagLIF) is a magneto-inertial fusion concept that is presently being studied on Sandia’s Z machine. The concept utilizes an axial magnetic field of order 10 T to reduce thermal conduction losses as a cm-scale beryllium can implodes and compresses fusion fuel, which was preheated to of order 100 eV with a few kJ from a TW-class laser. During the implosion, the...
Axially rotating plasmas implode very differently than non-rotating ones since the kinetic energy delivered by the implosion is now shared between pressure and rotation, rather than pressure alone. We propose to study this approach numerically inside a MagLIF target using a cryo-DT fiber rather than a gas pre-fill. An external pulsed-power generator is used to turn the fiber into a plasma....
