Light ion driven inertial confinement fusion

Quintenz, J. P.; Bloomquist, D. D.; Leeper, R. J.; Mehlhorn, T. A.; Olson, Craig; Olson, R. E.; Peterson, R. R.; Matzen, M. K.; Cook, D.L.

doi:10.1016/0149-1970(95)00083-v

Cited by 15 publications

(8 citation statements)

References 90 publications

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“…Ion diodes have been fielded as loads on the end of a MITL in the past for both water-line and IVA accelerators in positive polarity, but the diodes have typically been appliedmagnetic-field diodes (ABDs). 32,33 In this case the MITL electron flow is shunted to the anode upstream of the diode by the large, transverse, externally applied magnetic field associated with the ABD and does not participate as part of the diode current. For the backless ion PBD used in this work, 19 the MITL electron flow can interact with the diode and, because the flow current is not necessarily lost, has the potential for more efficient coupling of power from the accelerator to the diode.…”

Section: Shotmentioning

confidence: 99%

Ion diode performance on a positive polarity inductive voltage adder with layered magnetically insulated transmission line flow

et al. 2011

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A pinch-reflex ion diode is fielded on the pulsed-power machine Mercury (R. J. Allen, et al., 15th IEEE Intl. Pulsed Power Conf., Monterey, CA, 2005, p. 339), which has an inductive voltage adder (IVA) architecture and a magnetically insulated transmission line (MITL). Mercury is operated in positive polarity resulting in layered MITL flow as emitted electrons are born at a different potential in each of the adder cavities. The usual method for estimating the voltage by measuring the bound current in the cathode and anode of the MITL is not accurate with layered flow, and the interaction of the MITL flow with a pinched-beam ion diode load has not been studied previously. Other methods for determining the diode voltage are applied, ion diode performance is experimentally characterized and evaluated, and circuit and particle-in-cell (PIC) simulations are performed. Results indicate that the ion diode couples efficiently to the machine operating at a diode voltage of about 3.5 MV and a total current of about 325 kA, with an ion current of about 70 kA of which about 60 kA is proton current. It is also found that the layered flow impedance of the MITL is about half the vacuum impedance.

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Section: Shotmentioning

confidence: 99%

Ion diode performance on a positive polarity inductive voltage adder with layered magnetically insulated transmission line flow

et al. 2011

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“…11,12 Beam transport provides standoff or isolation between the driver hardware and debris from the ICF target explosion. Advantages exist for SPT in both light ion fusion ͑LIF͒ 13 and heavy ion fusion ͑HIF͒ 14 where multiple ion beams are used to indirectly drive a target implosion.…”

Section: Numerical Simulations Of Self-pinched Transport Of Intense Imentioning

confidence: 99%

“…[11][12][13] The LIF beam source is envisioned to be annular and to produce a fully stripped beam. 15 A typical LIF beam consists of Li ϩ3 ions with kinetic energy of 35…”

Section: Numerical Simulations Of Self-pinched Transport Of Intense Imentioning

confidence: 99%

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Numerical simulations of self-pinched transport of intense ion beams in low-pressure gases

et al. 1999

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The self-pinched transport of intense ion beams in low-pressure background gases is studied using numerical simulations and theoretical analysis. The simulations are carried out in a parameter regime that is similar to proton beam experiments being fielded on the Gamble II pulsed power generator ͓J. D. Shipman, Jr., IEEE Trans. Nucl. Sci. NS-18, 243 ͑1971͔͒ at the Naval Research Laboratory. Simulation parameter variations provide information on scaling with background gas species, gas pressure, beam current, beam energy, injection angles, and boundaries. The simulation results compare well with simple analytic scaling arguments for the gas pressure at which the effective net current should peak and with estimates for the required confinement current. The analysis indicates that the self-pinched transport of intense proton beams produced on Gamble II ͑1.5 MeV, 100 kA, 3 cm radius͒ is expected to occur at gas pressures between 30 and 80 mTorr of He or between 3 and 10 mTorr of Ar. The significance of these results to ion-driven inertial confinement fusion is discussed.

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“…Inertial confinement fusion driven by intense beams of light ions offers the possibility for high gain target implosions. Intense ion beams are attractive for driving ICF targets for several reasons [1]. First, intense light ion beams have been produced with 'wall plug efficiencies' (the efficiency of converting the energy taken off the electrical power grid into ion beam energy) of 15%.…”

Section: Introductionmentioning

confidence: 99%

Deposition and drive symmetry for light ion ICF targets

Allshouse¹,

Olson

Callahan-Miller

et al. 1999

Nucl. Fusion

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Light ion beam ICF is a concept in which intense beams of low atomic number ions would be used to drive ICF targets to ignition and gain. Three dimensional analytic approximations indicate that at least twelve beams would be required to drive an indirect drive target with adequate symmetry. Here, results from two dimensional numerical simulations are presented describing the ion deposition and drive symmetry aspects of such a target for which the ion beams are approximated as ring sources. For adequate symmetry in the two dimensional calculations, the simulations required six ring sources and two pole sources during the low power `foot' pulse and four ring sources during the main ion beam drive pulse. If each ring represents five individual beams, this corresponds to 32 beams in the foot pulse and 20 beams in the main pulse. The corresponding two dimensional integrated LASNEX calculation, simulating the target from ion beam input to ignition and burn in the same code run, produced 591 MJ of thermonuclear yield with lithium ion beam sources containing a total input energy of 16 MJ.

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Light ion driven inertial confinement fusion

Cited by 15 publications

References 90 publications

Ion diode performance on a positive polarity inductive voltage adder with layered magnetically insulated transmission line flow

Ion diode performance on a positive polarity inductive voltage adder with layered magnetically insulated transmission line flow

Numerical simulations of self-pinched transport of intense ion beams in low-pressure gases

Deposition and drive symmetry for light ion ICF targets

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