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Magneto-Inertial Fusion (MIF)

Innovative Breakthroughs in
Fusion Technology

Magneto-Inertial Fusion (MIF) synergistically combines the best features of Magnetic Confinement Fusion (MCF) and Inertial Confinement Fusion (ICF).

Our pioneering approach to it, the Staged Z-Pinch makes thermo-nuclear fusion with net energy gain easier to achieve and significantly more cost-effective than other approaches. It involves using a liner with a higher atomic number to compress a fusible target. This process initiates shock preheating of the target plasma to approximately 100 eV, while compression of the magnetic field (Bɵ) at the liner/target interface near stagnation time generates an extraordinarily high magnetic field (10³ – 10⁴).This magnetic field effectively “freezes” electrons along the Bɵ (azimuthal magnetic field) lines, leading to mass accumulation and robust adiabatic compression. In this approach the target plasma remains stable until peak implosion, surrounded by a strong magnetic field that retains alpha particles. Under the right conditions, this results in the ignition of the target plasma and fusion with net energy gain.

Magneto-inertial Fusion (MIF)

In our opinion this MIF approach using a Staged Z-Pinch synergistically combines the best features of Magnetic Confinement Fusion (MCF) and Inertial Confinement Fusion (ICF), making thermo-nuclear fusion with net energy gain easier to achieve and also significantly more cost-effective than other approaches.

MIFTI’s SZP technology Embodies the Future of Fusion Energy, Characterized By:

Sustainability: Using hydrogen isotopes either from seawater or bred on site

Environmental friendliness: No long-term radioactive waste

Independence: Not reliant on variable natural resources

Scalability: Customizable to diverse application needs

Decentralization: Suitable for small-grid installations

Cost-effectiveness: Unmatched in power generation

With our path-breaking MIFGEN plant, utilizing our patented SZP technology, MIFTI is setting the stage for commercial-scale power plants within the next 5 – 7 years. A successful MIF demonstration in a SZP configuration will not only revolutionize the energy sector but also pave the way for a cleaner, more sustainable future.

Our Staged Z-Pinch Concept

Z-Pinches were one of the first thermonuclear fusion energy ideas explored. The earliest observations of deuterium-deuterium fusion neutrons from Z-Pinches were reported in 1950s (Post, 1956, Berglund et al., 1957, Anderson et al., 1958) but the classical magnetohydrodynamic (MHD) and magneto Rayleigh-Taylor (MRT) instabilities limited the fusion yield. In the late 1970s, A. Fisher and collaborators at the University of California, Irvine (UCI), created the first gas puff Z-Pinch using a 200-kA pulsed power generator (Shiloh et al. 1978). Use of the gas mixtures enhanced the pinch stability and increased its radiation efficiency (Bailey et al. 1982). Applying a modest level of axial magnetic field and compressing it by gas puff Z-Pinch increased the magnetic flux compression, allowing amplification of the axial magnetic field Bz and stabilization of the Z-pinch (Wessel et al. 1986 and Felber et al. 1988).

The UCI experiments led to a concept called Staged Z-Pinch (SZP) where the energy to the final load is transferred in successive stages and the rate of energy transfer increases in each stage. The SZP name was initially used (Rahman et al. 1995) for an annular shell (i.e. liner) compressing an on-axis cryogenic deuterium fiber (i.e. target): the current pre-pulse in the fiber premagnetized the liner, which was then compressed with the main Z-Pinch current pulse through the liner; if the azimuthal magnetic flux is conserved inside the liner, the initial pre-pulse current can grow to a very large value on a fast time scale. The key SZP feature is the control and mitigation of the Magneto-Rayleigh-Taylor instability, allowing the formation of stable target plasma, even though the liner plasma becomes unstable (Rahman et al. 2001). The concept further evolved to include gas-puff liners. It was observed both theoretically and experimentally that by using a high atomic number (i.e. high-Z) liner, the liner would cool down due to higher level of radiation loss and thus facilitate the diffusion of magnetic field.
  • CESZAR is a compact machine at UC San Diego, based on Linear Transformer Driver (LTD) generator technology.
  • 4 kJ stored energy, 0.5 mega-ampere current, 200 ns rise time
  • Experiments using various liner gases (Ne, Ar, Kr) on deuterium target

In this approach, Magnetosonic (MS) and ion acoustic shock waves are produced in the liner plasma during pinch implosion. Their timing and effect are governed by interplay of coupled parameters: the mass distributions, the liner acceleration, the material-atomic numbers, the degree of ionization, and the presence of intense-magnetic fields. When a high-atomic-number liner and low-atomic number target are used, MS shocks transport discharge current and magnetic field into the liner interior, at a rate much faster than classical diffusion. The result is a stable, high-density, shock-front discontinuity, at the liner-target interface that propagates ahead of the slower-moving, unstable liner. Ion acoustic shock waves penetrate into the target plasma and provide an additional source of target pre-heat and ultimately contribute to the adiabatic compressional heating. Near peak compression, current amplification occurs near the interface, due to flux-compression, that allows the target to compress inertially and adiabatically. The intense-magnetic fields that develop at the interface, confine the fusion products, and could lead to ignition for high current machines.

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