Asymmetric capsule for inertial confinement fusion

Abstract

Methods, devices and system for asymmetric inertial confinement fusion are disclosed. One method includes a fixing in position a target capsule comprising an inertial confinement fusion fuel, where the target capsule is substantially spherical. The method further includes for applying an oscillatory compression to the target capsule. The oscillatory compression includes compression at a first time in a radial direction orthogonal to a diametric axis of the target capsule, and compression at a second time along the diametric axis to drive the target capsule into driven into an ovoid shape. The oval shaped target can implode upon being further driven at a third time.

What is claimed is: 
     
         1 . An asymmetric inertial confinement fusion target capsule comprising:
 an ovoid shaped shell; and   a fuel comprising deuterium and tritium, wherein the target capsule is positioned to receive an oscillatory energy to cause nuclear ignition of the target capsule,   wherein the target capsule is positioned to receive the oscillatory energy applied asymmetrically by a first oscillatory compression to the target capsule at a first time with more energy along a first axis of the target capsule than a second axis orthogonal to the first axis of the target capsule, with no oscillatory compression applied to the target capsule prior to the first time, and   wherein the target capsule is positioned to receive a second oscillatory compression applied asymmetrically to the target capsule at a second time with more energy along the second axis than the first axis, and   wherein an ovoid shaped implosion of the target capsule is caused upon application of a third oscillatory compression to the target capsule at a third time, wherein the first time occurs before the second time and the second time occurs before the third time, and wherein no oscillatory compression after the third time is applied to the target capsule prior to the ovoid shaped implosion.   
     
     
         2 . The asymmetric inertial confinement fusion target capsule of  claim 1 , wherein the first axis is an equatorial axis and the second axis is a polar axis. 
     
     
         3 . The asymmetric inertial confinement fusion target capsule of  claim 1 , wherein the target capsule is positioned inside a hohlraum. 
     
     
         4 . The asymmetric inertial confinement fusion target capsule of  claim 3 , wherein the target capsule is held in the hohlraum by one or more support structures. 
     
     
         5 . The asymmetric inertial confinement fusion target capsule of  claim 4 , wherein the target capsule is cooled in the hohlraum. 
     
     
         6 . The asymmetric inertial confinement fusion target capsule of  claim 1 , wherein the target capsule is positioned to receive one or more of a laser beam or an ion beam to effectuate compression of the target capsule. 
     
     
         7 . The asymmetric inertial confinement fusion target capsule of  claim 1 , wherein the oscillatory energy is provided by a driver that is configured to drive the target capsule with more energy along a first axis than a second axis orthogonal to the first axis, and subsequently drive the target capsule with more energy along the second axis than the first axis. 
     
     
         8 . The asymmetric inertial confinement fusion target capsule of  claim 1 , wherein the target capsule includes one or more of deuterium, tritium, or helium-3. 
     
     
         9 . The asymmetric inertial confinement fusion target capsule of  claim 1 , wherein the third oscillatory compression applies equal energy along the first axis and the second axis. 
     
     
         10 . The asymmetric inertial confinement fusion target capsule of  claim 1 , wherein the third oscillatory compression applies more energy along the first axis than the second axis 
     
     
         11 . The asymmetric inertial confinement fusion target capsule of  claim 1 , wherein the third oscillatory compression applies less energy along the first axis than the second axis 
     
     
         12 . The asymmetric inertial confinement fusion target capsule of  claim 1 , wherein the first, second, and third oscillatory compressions are delivered via direct drive to the target capsule. 
     
     
         13 . The asymmetric inertial confinement fusion target capsule of  claim 1 , wherein the first, second, and third oscillatory compressions are delivered to the target capsule by beams that impinge on an inside surface of the hohlraum before reaching the target capsule.