High-impedance ion-diode experiment on the Aurora pulser

Meger, R. A.; Young, F.C.; Drobot, A.; Cooperstein, G.; Goldstein, Shyke A.; Mosher, D.; Graybill, S. E.; Huttlin, G. A.; Kerris, K. G.; Stewart, A. G. R.

doi:10.1063/1.328548

Cited by 12 publications

(3 citation statements)

References 8 publications

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“…One of the most successful experiments was carried out on the Aurora pulsed-power generator which was able to accelerate 5 Â 10 16 protons up to 5 MeV energies. 47 A 160 ns FWHM pulse implied an ion current of about 50 kA. The ions appeared to originate primarily from a small area (2-4 cm 2 ) at an anode.…”

Section: Other Powerful Sources Of Multi-mev Ionsmentioning

confidence: 98%

Deuterium z-pinch as a powerful source of multi-MeV ions and neutrons for advanced applications

et al. 2016

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A novel configuration of a deuterium z-pinch has been used to generate a nanosecond pulse of fast ions and neutrons. At a 3 MA current, the peak neutron yield of (3.6 ± 0.5) × 1012 was emitted within 20 ns implying the production rate of 1020 neutrons/s. High neutron yields resulted from the magnetization of MeV deuterons inside plasmas. Whereas deuterons were trapped in the radial direction, a lot of fast ions escaped the z-pinch along the z-axis. A large number of >25 MeV ions were emitted into a 250 mrad cone. The cut-off energy of broad energy spectra of hydrogen ions approached 40 MeV. The total number of >1 MeV and >25 MeV deuterons were 1016 and 1013, respectively. Utilizing these ions offers a real possibility of various applications, including the increase of neutron yields or the production of short-lived isotopes in samples placed in ion paths. On the basis of our experiments with various samples, we concluded that a single shot would have been sufficient to obtain GBq positron activity of 13N isotopes via the 12C(d,n)13N reaction. Furthermore, the first z-pinch generated neutron radiograph produced by ≈20 ns pulses is presented in this paper.

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Section: Other Powerful Sources Of Multi-mev Ionsmentioning

confidence: 98%

Deuterium z-pinch as a powerful source of multi-MeV ions and neutrons for advanced applications

et al. 2016

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“…The presence of carbon ions has been identified in previous ion-diode experiments by the activation of aluminum with the 27 Al( 12 C,an) 34m Cl reaction. 40 Additionally, carbon ions consisting of C þ1 , C þ2 , C þ3 , and C þ4 with a carbon fraction of about 10% have been measured previously in an ion PBD with a Thomson-parabola ion analyzer. 59 Here, a carbon fraction of 10% with an average charge state of about þ3 would be measured as about 10 kA.…”

Section: Licl Nuclear Diagnosticmentioning

confidence: 99%

“…Note that Aurora was a traditional oil-Blumlein accelerator, not an IVA, but had a stainless steel MITL with 50-X vacuum impedance between the oil-vacuum interface and the diode load. The ion diode on Aurora was fielded in both negative polarity with the full-length MITL 40 and positive polarity with a reduced-length MITL. 39 In both cases the Marx was only charged to 90 kV (compared with 120 kV for full charge).…”

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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Nuclear Reaction Diagnostics for Intense Particle Beam Measurements

Leeper

1986

Fast Electrical and Optical Measurements

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High-impedance ion-diode experiment on the Aurora pulser

Cited by 12 publications

References 8 publications

Deuterium z-pinch as a powerful source of multi-MeV ions and neutrons for advanced applications

Deuterium z-pinch as a powerful source of multi-MeV ions and neutrons for advanced applications

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

Nuclear Reaction Diagnostics for Intense Particle Beam Measurements

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