Design, construction, and characterization of a compact DD neutron generator designed for 40Ar/39Ar geochronology

Ayllon, Mauricio; Adams, Parker A.; Batchelder, J.C.; Bauer, J. D.; Becker, T.; Bernstein, L. A.; Chong, Su-Ann; James, Jay Z.; Kirsch, Leo; Leung, K. N.; Matthews, E. F.; Morrell, Jonathan T.; Renne, Paul R.; Rogers, A. M.; Rutte, Daniel; Voyles, Andrew S.; Bibber, K. van; Waltz, Cory

doi:10.1016/j.nima.2018.04.020

Cited by 17 publications

(13 citation statements)

References 10 publications

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“…We used one ion source of the HFNG using a multi-aperture extraction plate, directing 31 beamlets of D + ions at a titanium surface 8 mm above the samples. Impinging with an energy of 100 keV, they produced neutrons through fusion with already embedded D ( 15 ). The setup resulted in a neutron source region with a diameter of 19 mm centered on the samples.…”

Section: Methodsmentioning

confidence: 99%

“…It was then extracted through hole(s) in an extraction plate: Irradiation 1 used a single extraction hole with a diameter of 4 mm, while irradiation 3 used 31 holes with a diameter of 1 mm, arranged in a triangular pattern [cf. ( 15 ) for details on extraction plates]. The resulting beamlets were accelerated by a high-voltage differential potential (here 100 kV) and implanted in a Ti target.…”

Section: Methodsmentioning

confidence: 99%

“…Such a proposed apparatus, dubbed the high flux neutron generator (HFNG), has been constructed at the University of California (UC) Berkeley, commissioned in 2013, and has undergone continuous upgrades subsequently. Its design and technical capabilities were recently detailed in ( 15 ). Here, we report (i) the first dating and experiments to quantify (ii) the reduction of recoil, (iii) interference reactions, and (iv) the 39 K(n,p) 39 Ar cross section at 1.3 to 3.2 MeV.…”

Section: Introductionmentioning

confidence: 99%

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Boutique neutrons advance ⁴⁰ Ar/ ³⁹ Ar geochronology

et al. 2019

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We designed and tested a compact deuteron-deuteron fusion neutron generator for application to 40Ar/39Ar geochronology. The nearly monoenergetic neutrons produced for sample irradiation are anticipated to provide several advantages compared with conventional fission spectrum neutrons: Reduction of collateral nuclear reactions increases age accuracy and precision. Irradiation parameters within the neutron generator are more controllable compared with fission reactors. Confidence in the prediction of recoil energies is improved, and their likely reduction potentially broadens applicability of the dating method to fine-grained materials without vacuum encapsulation. Resolution of variation in the 39K(n,p)39Ar neutron capture cross section at 1.3 to 3.2 MeV and discovery of a strong resonance at ~2.4 MeV illuminate future pathways to improve the technique for 40Ar/39Ar dating.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Boutique neutrons advance ⁴⁰ Ar/ ³⁹ Ar geochronology

et al. 2019

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“…Neutron tube has been widely used in nuclear physics, reactor physics, radiochemistry and medicine, cancer treatment, neutron radiography, on-line neutron activation analysis, and nuclear data measurement [1][2][3][4][5]. Neutron tube is a kind of small accelerator neutron source, which seals ion source, acceleration system, target and pressure regulating system in a ceramic tube, forming a compact electric vacuum device.…”

Section: Introductionmentioning

confidence: 99%

The influence of target film material and coating on neutron yield and sputtering yield

Liu¹,

Lu²,

Xu³

et al. 2022

Mater. Res. Express

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The long-life, high yield deuterium-deuterium (D-D) neutron tube has become one of the research hotspots. Here, deuterated polyethylene target, heavy water target and titanium target were investigated by Stopping and Range of Ions in Matter (SRIM). The calculation showed that the deuterated polyethylene target, which was a potential target material, had the highest yield at an incident energy of 120 keV. Further, considering the unfavorable factors such as impurity ions and high temperature, the coating was used to protect the target material. Diamond, boron carbide, boron nitride, silicon carbide, and aluminum carbide were selected. The simulation results showed that the diamond composite deuterated polyethylene film had the best sputtering resistance, and the aluminum nitride composite heavy water target film had the lowest sputtering yield. The two coating materials shield the target, reduced the energy loss of incident ions, and provided a new method for the research of high yield and long life neutron tube.

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“…22,24 Neutron yields are measured using a cylindrical plastic scintillator, directly coupled to a fast PMT, that was calibrated at the High Flux Neutron Generator. 28 Monte Carlo N-Particle (MCNP) calculations are used to determine the effective solid angle for the detectors and to correct for room-dependent neutron attenuation and scattering effects. 29 The detector is located at z = 15 cm, and at a radial distance of 33 cm from the z-axis.…”

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confidence: 99%

Sustained Neutron Production from a Sheared-Flow Stabilized Z Pinch

et al. 2019

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The sheared-flow stabilized (SFS) Z-pinch has demonstrated long-lived plasmas with fusion-relevant parameters. This Letter presents the first experimental results demonstrating sustained, quasi-steady-state neutron production from the Fusion Z-pinch Experiment (FuZE), operated with a mixture of 20% deuterium/80% hydrogen by volume. Neutron emissions lasting approximately 5 µs are reproducibly observed with pinch currents of approximately 200 kA during an approximately 16 µs period of plasma quiescence. The average neutron yield is estimated to be (1.25 ± 0.45) × 10 5 neutrons/pulse and scales with the square of the deuterium concentration. Coincident with the neutron signal, plasma temperatures of 1 − 2 keV, and densities of approximately 10 17 cm −3 with 0.3 cm pinch radii are measured with fully-integrated diagnostics.

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Design, construction, and characterization of a compact DD neutron generator designed for 40Ar/39Ar geochronology

Cited by 17 publications

References 10 publications

Boutique neutrons advance ⁴⁰ Ar/ ³⁹ Ar geochronology

Boutique neutrons advance ⁴⁰ Ar/ ³⁹ Ar geochronology

The influence of target film material and coating on neutron yield and sputtering yield

Sustained Neutron Production from a Sheared-Flow Stabilized Z Pinch

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Design, construction, and characterization of a compact DD neutron generator designed for 40Ar/39Ar geochronology

Cited by 17 publications

References 10 publications

Boutique neutrons advance 40 Ar/ 39 Ar geochronology

Boutique neutrons advance 40 Ar/ 39 Ar geochronology

The influence of target film material and coating on neutron yield and sputtering yield

Sustained Neutron Production from a Sheared-Flow Stabilized Z Pinch

Contact Info

Product

Resources

About

Boutique neutrons advance ⁴⁰ Ar/ ³⁹ Ar geochronology

Boutique neutrons advance ⁴⁰ Ar/ ³⁹ Ar geochronology