Deuterated target comparison for pyroelectric crystal D–D nuclear fusion experiments

Gillich, Donald J.; Kovanen, Andrew; Danon, Y.

doi:10.1016/j.jnucmat.2010.08.012

Cited by 21 publications

(18 citation statements)

References 17 publications

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“…It follows from the Table that for SBN-61 the parameter γ(T )/ε cr . = 0.11 nC/(cm 2 ×K), which is 2.5 times smaller than for LiNbO 3 . The lower value F I for SBN-61 crystals is determined by the permittivity, which is anomalously large: ε cr = 800.…”

Section: Resultsmentioning

confidence: 75%

“…The crystal (1) was attached onto the copper plate (2), mounted on the thermoelectric Peltier module (3). The upper face of the crystal had the positive polarity (c+).…”

Section: Methodsmentioning

confidence: 99%

“…[1][2][3][4] In these devices, strong electric fields with strengths up to 100 kV/cm are produced due to uncompensated charges, which are formed on the surface of a pyroelectric crystal under temperature change by 50-100 • C. In X-ray sources, these fields accelerate electrons, which after collision with a target or a pyroelectric crystal induce the generation of characteristic and bremsstrahlung X-rays. In neutron sources, these electric fields cause ionization of deuterium molecules and their subsequent acceleration to a deuterium target, where the reaction of fusion D+D = He + n occurs.…”

Section: Introductionmentioning

confidence: 99%

“…In neutron sources, these electric fields cause ionization of deuterium molecules and their subsequent acceleration to a deuterium target, where the reaction of fusion D+D = He + n occurs. 3,4 The electric charge Q on the polar face of pyroelectric crystal is the sum of the bound charge Q bond (T ) and the compensating surface charge Q comp : Q = Q bond (T ) + Q comp . The bound charge Q bond (T ) is due to the macroscopic polarization of the crystal and depends on the temperature T. The charge Q bond (T ) is sufficiently large, 5,6 and for the lithium niobate and lithium tantalate crystals it is about 50 µC/cm 2 .…”

Section: Introductionmentioning

confidence: 99%

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X-ray source on the basis of the piroelectric crystal Sr0.61Ba0.39Nb2O6

et al. 2017

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The properties of X-ray source based on Sr0.61Ba0.39Nb2O6 crystals (SBN-61) having a large pyroelectric coefficient γ = 85 nC/(cm2K) was studied. When the crystal was heated to 60 ° C, X-rays from a tungsten target with energy of 8.4 keV were detected. The maximum energy of the electron beam was 52 keV. The visualization of the electron beam with a grid electrode and a fluorescent screen showed that the electron beam was inhomogeneous in the polar plane of the crystal and varied during heating.The radiation intensity was unstable in time. The work of the X-ray source was limited to electrical breakdowns between the polar faces of the crystal. When the crystal was cooled, there was no X-ray emission, which could be due to the depolarization of the crystal by the total electric field or as a result of electrical breakdowns. The crystals SBN-61 and LiNbO3 are compared.

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Section: Resultsmentioning

confidence: 75%

“…The crystal (1) was attached onto the copper plate (2), mounted on the thermoelectric Peltier module (3). The upper face of the crystal had the positive polarity (c+).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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X-ray source on the basis of the piroelectric crystal Sr0.61Ba0.39Nb2O6

et al. 2017

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“…Gillich [7] reports calculations showing that plastic targets have higher theoretical neutron yield than metal targets, but that plastic targets degrade under the experimental condition of pyrofusion. Deuterated titanium targets loaded 2:1 D:Ti (theoretically, the maximum limit) had the next highest theoretical yield.…”

Section: Introductionmentioning

confidence: 99%

Neutron production using a pyroelectric driven target coupled with a gated field ionization source

Ellsworth

Tang

Falabella

et al. 2013

AIP Conference Proceedings

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Abstract.A palm sized, portable neutron source would be useful for widespread implementation of detection systems for shielded, special nuclear material. We present progress towards the development of the components for an ultracompact neutron generator using a pulsed, meso-scale field ionization source, a deuterated (or tritiated) titanium target driven by a negative high voltage lithium tantalate crystal. Neutron production from integrated tests using an ion source with a single, biased tungsten tip and a 3x1 cm, vacuum insulated crystal with a plastic deuterated target are presented. Component testing of the ion source with a single tip produces up to 3 nA of current. Dielectric insulation of the lithium tantalate crystals appears to reduce flashover, which should improve the robustness. The field emission losses from a 3 cm diameter crystal with a plastic target and 6 cm diameter crystal with a metal target are compared.

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Neutron Yield Increase by Simulated Pyroelectric Crystal Neutron Source

Valikhani

Habibi

2017

J Fusion Energ

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Deuterated target comparison for pyroelectric crystal D–D nuclear fusion experiments

Cited by 21 publications

References 17 publications

X-ray source on the basis of the piroelectric crystal Sr0.61Ba0.39Nb2O6

X-ray source on the basis of the piroelectric crystal Sr0.61Ba0.39Nb2O6

Neutron production using a pyroelectric driven target coupled with a gated field ionization source

Neutron Yield Increase by Simulated Pyroelectric Crystal Neutron Source

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