Low density volume ignition assisted by high-Z shell
نویسندگان
چکیده
Conventionally driven high-Z metal shell implosion, with a large radius (a few centimeters) and a low DT gas pressure (∼ 10−5 g/cm), is calculated by one dimensional radiation hydrodynamics to find the fusion ignition energy. Calculation shows, with sufficiently high driving pressure and the right amount of fusion fuel, a volume ignition like fusion process can be initiated, at a ignition temperature of about 2 keV, and a relatively low density of about 70 g/cm. The total fusion energy released is limited. Excessive kinetic energy and extra confinement provided by the shell is essential in this low density low area density volume ignition. PACS numbers: 52.58.-c, 89.30.Jj Cavity Implosion 2
منابع مشابه
Hot-Core Characterization of a Cryogenic D2 Target at Peak Neutron Production in a Direct-Drive Spherical Implosion
LLE Review, Volume 97 11 In inertial confinement fusion1 (ICF), a spherical shell is irradiated either directly by a large number of overlapping laser beams (direct drive) or by x rays produced in a high-Z “hohlraum” (indirect drive).2 During the laser-driven acceleration phase of an implosion, the target compresses while it converges to the center, then decelerates to peak compression as the c...
متن کاملSpherical Strong-Shock generation for Shock-ignition inertial fuSion
LLE Review, Volume 141 48 Introduction Shock ignition (SI)1–5 is an advanced concept in inertial confinement fusion (ICF)6 that is very promising and has the potential to provide significantly higher gains than conventional hot-spot ignition.7 SI is a two-step process where the fuel compression and ignition phases are separated by applying a highly shaped laser pulse with a duration of several ...
متن کاملHollow-Shell Implosion Studies on the 60-Beam, UV OMEGA Laser System
82 LLE Review, Volume 78 Direct-drive inertial confinement laser fusion is accomplished by uniformly illuminating spherical fuel-bearing targets with high-power laser beams, ablatively driving implosions that result in large increases in density and temperature. Current large laser systems such as the University of Rochester’s OMEGA laser, which is capable of both directand indirectdrive implos...
متن کاملFuel Assembly for Conventional, Fast and Shock Ignition Direct-Drive Inertial Confinement Fusion
Relations between stagnation and in-flight phases are derived both analytically and numerically, for hydrodynamic variables relevant to direct-drive inertial confinement fusion implosions. Scaling laws are derived for the stagnation values of the shell density and areal density; also the hot spot pressure, temperature and areal density. Simple formulas are derived for the thermonuclear energy g...
متن کاملDiagnosing Implosions at the National Ignition Facility with X-ray Spectroscopy
X-ray spectroscopy is used on the National Ignition Facility (NIF) to diagnose the plasma conditions in the hot spot and the compressed shell of ignition-scale inertial confinement fusion (ICF) implosions. Ignition of an ICF target depends on the formation of a central hot spot with sufficient temperature and areal density. The concentric spherical layers of current NIF ignition targets consist...
متن کامل