The collaboration will study fusion in a relatively unexplored intermediate density regime between the lower - than - air density
of magnetic confinement fusion (MCF) that is studied at the ITER project in southern France, and the greater - than - solid density of laser - driven inertial confinement fusion (ICF) at the National Ignition Facility at Lawrence Livermore National Laboratory.
«The interesting thing about our ideas on mass separation is that it is a form
of magnetic confinement, so it fits well within the Laboratory's culture,» said physicist Nat Fisch, co-author of the paper and director of the Princeton University Program in Plasma Physics.
Recent results with Tokamak experiments provide insights into the problem
of magnetic confinement.
Not exact matches
After that I wanted to do something very practical so I switched to work on
magnetic confinement fusion, as part
of the ongoing effort to develop fusion reactors.
In a recent paper published in EPJ H, Fritz Wagner from the Max Planck Institute for Plasma Physics in Germany, gives a historical perspective outlining how our gradual understanding
of improved
confinement regimes for what are referred to as toroidal fusion plasmas — confined in a donut shape using strong
magnetic fields — have developed since the 1980s.
Twelve scientific divisions are investigating
confinement of high - temperature hydrogen plasmas in
magnetic fields, heating
of plasmas, plasma diagnostics,
magnetic field technology, data acquisition and processing, plasma theory, materials research, plasma - wall interaction, and systems studies.
Inertial
confinement fusion (ICF) seeks to create those conditions by taking a tiny capsule
of fusion fuel (typically a mixture
of the hydrogen isotopes deuterium and tritium) and crushing it at high speed using some form
of «driver,» such as lasers, particle beams, or
magnetic pulses.
On the other hand, in
magnetic field
confinement fusion plasma intended for a fusion reactor, which research is being conducted at the National Institute for Fusion Science, development
of high precision electron density measurements is becoming an important research topic.
Inertial
confinement fusion achieves this by crushing tiny capsules
of fuel with intense laser or
magnetic field pulses to achieve the required conditions.
Most fusion research focuses on
magnetic confinement, using powerful electromagnets to contain a thin plasma
of hydrogen isotopes and heat it until the nuclei fuse.
The core
of the device uses cusp
confinement, a sort
of magnetic trap in which particles that try to escape are pushed back by rounded, pillowlike
magnetic fields.
McGuire says they get around this problem by encapsulating the cusp device inside a
magnetic mirror device, a different sort
of confinement technique.
The breakthrough is in
magnetic confinement fusion, in which hydrogen is heated until it is a plasma 10 times hotter than the centre
of the sun, and held in place by strong
magnetic fields until fusion reactions occur.
One is enhancement
of the negative - ion current by optimizing the
magnetic configuration for plasma
confinement in the ion source.
The campaign will also increase the heating power
of the stellarator to eight megawatts to enable operation at a higher beta — the ratio
of plasma pressure to the
magnetic field pressure, a key factor for plasma
confinement.
A main goal
of tokamak research is to use
magnetic plasma
confinement to develop the means
of operating high - pressure fusion plasmas near stability and controllability boundaries while avoiding the occurrence
of transient events that can degrade performance or terminate the plasma discharge.