Learn More
A recent publication [D.] describes the first controlled experiments measuring the growth of the magneto-Rayleigh–Taylor instability in fast ($100 ns) Z-pinch plasmas formed from initially solid aluminum tubes (liners). Sinusoidal perturbations on the surface of these liners with wavelengths of 25–400 lm were used to seed single-mode instabilities. The(More)
The Z-pinch dynamic hohlraum is an x-ray source for high energy-density physics studies that is heated by a radiating shock to radiation temperatures >200 eV. The time-dependent 300-400 eV electron temperature and 15-35 mg/cc density of this shock have been measured for the first time using space-resolved Si tracer spectroscopy. The shock x-ray emission is(More)
The first controlled experiments measuring the growth of the magneto-Rayleigh-Taylor instability in fast (∼100  ns) Z-pinch plasmas are reported. Sinusoidal perturbations on the surface of an initially solid Al tube (liner) with wavelengths of 25-400  μm were used to seed the instability. Radiographs with 15  μm resolution captured the evolution of the(More)
The radial convergence required to reach fusion conditions is considerably higher for cylindrical than for spherical implosions since the volume is proportional to r 2 versus r 3 , respectively. Fuel magnetization and preheat significantly lowers the required radial convergence enabling cylindrical implosions to become an attractive path toward generating(More)
Recyclable transmission lines ͑RTLs͒ are being studied as a means to repetitively drive Z pinches. Minimizing the mass of the RTL should also minimize the reprocessing costs. Low mass RTLs could also help reduce the cost of a single shot facility such as the proposed X-1 accelerator and make Z-pinch driven nuclear space propulsion feasible. Calculations are(More)
Research Areas: Phenomenology of surface science, including roughness-induced field enhancements and heating, electrical and thermal contacts, surface flashover and discharge; electromagnetic wave-structure interaction; surface instability of pinch plasmas Nanyang Technological University (Singapore) 07/2006-07/2008 Project Officer Research Areas: Electron(More)
An approach is presented to design inertial-fusion capsules compensated for time-dependent radiation-drive asymmetries. This approach uses in depth variable doping of the capsule ablator, i.e., the addition of small amounts of material to tailor the opacity. Simulations show that an inertial-fusion capsule, using a beryllium ablator variably doped with(More)
A key demonstration on the path to inertial fusion energy is the achievement of high fusion yield ͑hundreds of MJ͒ and high target gain. Toward this goal, an indirect-drive high-yield inertial confinement fusion ͑ICF͒ target involving two Z-pinch x-ray sources heating a central secondary hohlraum is described by Hammer et al. ͓Phys. Plasmas 6, 2129 ͑1999͔͒.(More)
  • 1