Ignition conditions for magnetized target fusion in cylindrical geometry

Basko, M. M.; Kemp, Andreas; Meyer‐ter‐Vehn, J.

doi:10.1088/0029-5515/40/1/305

Cited by 114 publications

(82 citation statements)

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“…An analytic solution of a-particle trapping in a uniform cylinder 25 was used to test the a-particle transport in LASNEX with excellent agreement. Note also that LASNEX includes non-ideal MHD terms due to the Hall and Nernst effects, which have been found to be important in previous studies.…”

Section: Numerical Model Of Maglif Implosionsmentioning

confidence: 99%

Scaling magnetized liner inertial fusion on Z and future pulsed-power accelerators

et al. 2016

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The MagLIF (Magnetized Liner Inertial Fusion) concept [S. A. Slutz et al., Phys. Plasmas 17, 056303 (2010)] has demonstrated fusion–relevant plasma conditions [M. R. Gomez et al., Phys. Rev. Lett. 113, 155003 (2014)] on the Z accelerator with a peak drive current of about 18 MA. We present 2D numerical simulations of the scaling of MagLIF on Z as a function of drive current, preheat energy, and applied magnetic field. The results indicate that deuterium-tritium (DT) fusion yields greater than 100 kJ could be possible on Z when all of these parameters are at the optimum values: i.e., peak current = 25 MA, deposited preheat energy = 5 kJ, and Bz = 30 T. Much higher yields have been predicted [S. A. Slutz and R. A. Vesey, Phys. Rev. Lett. 108, 025003 (2012)] for MagLIF driven with larger peak currents. Two high performance pulsed-power accelerators (Z300 and Z800) based on linear-transformer-driver technology have been designed [W. A. Stygar et al., Phys. Rev. ST Accel. Beams 18, 110401 (2015)]. The Z300 design would provide 48 MA to a MagLIF load, while Z800 would provide 65 MA. Parameterized Thevenin-equivalent circuits were used to drive a series of 1D and 2D numerical MagLIF simulations with currents ranging from what Z can deliver now to what could be achieved by these conceptual future pulsed-power accelerators. 2D simulations of simple MagLIF targets containing just gaseous DT have yields of 18 MJ for Z300 and 440 MJ for Z800. The 2D simulated yield for Z800 is increased to 7 GJ by adding a layer of frozen DT ice to the inside of the liner.

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Section: Numerical Model Of Maglif Implosionsmentioning

confidence: 99%

Scaling magnetized liner inertial fusion on Z and future pulsed-power accelerators

et al. 2016

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“…In each case one of these parameters (denoted by BR ) is a measure of the field strength. Previous work in which only a uniform axial field was considered [3] has identified BR (where B is the magnetic field strength and R is fuel radius) as a key parameter for studying fast ion transport in magnetized cylin-…”

Section: A C C E P T E D Mmentioning

confidence: 99%

“…Analogous to the BR parameter for cylinders with a purely axial field, [3] we define a parameter BR as a measure of integrated field strength…”

Section: Field Parameterization For the Azimuthal Topologymentioning

confidence: 99%

“…[3] The field reduces electron thermal conduction and confines the energetic α particles, thereby increasing the self-heating. [4] Magnetized Liner Inertial Fusion (MagLIF) is a fusion scheme currently being investigated at the Z facility, in which a magnetic field is compressed with the fuel in order to generate large magnetic fields at peak compression.…”

Section: Introductionmentioning

confidence: 99%

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The effects of magnetic field topology on secondary neutron spectra in Magnetized Liner Inertial Fusion

Appelbe

Pecover

Chittenden

2017

High Energy Density Physics

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“…From an ICF perspective, the primary benefits are potentially orders of magnitude reduction in the difficult to achieve qr parameter (areal density), and potentially significant reduction in velocity requirements and hydrodynamic instabilities for compression drivers. In fact, ignition becomes theoretically possible from qr B 0.01 g/cm 2 up to conventional ICF values of qr * 1.0 g/cm 2 , and as in MCF, Br rather than qr becomes the key figure-of-merit for ignition because of the enhanced alpha deposition [4]. Within the lower-qr parameter space, MIF exploits lower required implosion velocities (2-100 km/s, compared to the ICF minimum of 350-400 km/s) allowing the use of much more efficient (g C 0.3) pulsed power drivers, while at the highest (i.e., ICF) end of the qr range, both higher gain G at a given implosion velocity as well as lower implosion velocity and reduced hydrodynamic instabilities are theoretically possible.…”

Section: Descriptionmentioning

confidence: 99%

Magneto-Inertial Fusion

et al. 2015

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In this community white paper, we describe an approach to achieving fusion which employs a hybrid of elements from the traditional magnetic and inertial fusion concepts, called magneto-inertial fusion (MIF). The status of MIF research in North America at multiple institutions is summarized including recent progress, research opportunities, and future plans.Keywords Magneto-inertial fusion Á Magnetized target fusion Á Liner Á Plasma jets Á Fusion energy Á MagLIF DescriptionMagneto-inertial fusion (MIF) (aka magnetized target fusion) [1][2][3] is an approach to fusion that combines the compressional heating of inertial confinement fusion (ICF) with the magnetically reduced thermal transport and magnetically enhanced alpha heating of magnetic confinement fusion (MCF). From an MCF perspective, the higher density, shorter confinement times, and compressional heating as the dominant heating mechanism reduce the impact of instabilities. From an ICF perspective, the primary benefits are potentially orders of magnitude reduction in the difficult to achieve qr parameter (areal density), and potentially significant reduction in velocity requirements and hydrodynamic instabilities for compression drivers. In fact, ignition becomes theoretically possible from qr B 0.01 g/cm 2 up to conventional ICF values of qr * 1.0 g/cm 2 , and as in MCF, Br rather than qr becomes the key figure-of-merit for ignition because of the enhanced alpha deposition [4]. Within the lower-qr parameter space, MIF exploits lower required implosion velocities (2-100 km/s, compared to the ICF minimum of 350-400 km/s) allowing the use of much more efficient (g C 0.3) pulsed power drivers, while at the highest (i.e., ICF) end of the qr range, both higher gain G at a given implosion velocity as well as lower implosion velocity and reduced hydrodynamic instabilities are theoretically possible. To avoid confusion, it must be emphasized that the wellknown conventional ICF burn fraction formula does not apply for the lower-qr ''liner-driven'' MIF schemes, since it is the much larger mass and qr of the liner (and not that of the burning fuel) that determines the ''dwell time'' and fuel burnup fraction. In all cases, MIF approaches seek to satisfy/ exceed the inertial fusion energy (IFE) figure-of-merit gG * 7-10 required in an economical plant with reasonable recirculating power fraction. A great advantage of MIF is indeed its extremely wide parameter space which allows it greater versatility in overcoming difficulties in implementation or technology, as evidenced by the four diverse approaches and associated implosion velocities shown in Fig. 1.MIF approaches occupy an attractive region in thermonuclear q-T parameter space, as shown in a paper by

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Ignition conditions for magnetized target fusion in cylindrical geometry

Cited by 114 publications

References 12 publications

Scaling magnetized liner inertial fusion on Z and future pulsed-power accelerators

Scaling magnetized liner inertial fusion on Z and future pulsed-power accelerators

The effects of magnetic field topology on secondary neutron spectra in Magnetized Liner Inertial Fusion

Magneto-Inertial Fusion

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