Production of diamond using intense heavy ion beams at the FAIR facility and application to planetary physics

Tahir, N. A.; Bagnoud, V.; Neumayer, P.; Piriz, A. R.; Piriz, S. A.

doi:10.1038/s41598-023-28709-7

Cited by 3 publications

(1 citation statement)

References 58 publications

(47 reference statements)

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“…Previously [46], we reported 2D hydrodynamic simulations of implosion of carbon sample using the LAPLAS scheme (shown in Fig. 4), that is driven by a beam with a circular focal spot.…”

Section: Studymentioning

confidence: 99%

Production of Carbon Samples With Extreme Physical Conditions Using Intense Heavy Ion Beams at the Facility for Antiprotons and Ion Research: Application to Planetary Physics Research

Tahir,

Bagnoud,

Neumayer

et al. 2024

Preprint

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The possibility of existence of carbon-rich-planets makes it important to study High Energy States of carbon in order to understand the internal structure of such planets. In this paper, we present two-dimensional hydrodynamic simulations of a low-entropy compression of a carbon sample that is enclosed in a high-Z cylindrical shell that is driven by a high intensity uranium beam. The considered beam parameters are the ones that will be available at the accelerator facility, named, FAIR, at Darmstadt. This study has shown that the carbon sample can be compressed to super-solid densities, ultra-high pressures, while the temperature remains relatively low. These are the typical physical conditions that are expected to exist in the planetary interiors. An experimental study of the thermophysical and transport properties of such samples will significantly improve our knowledge about formation and evolution of different type of planets.

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“…Previously [46], we reported 2D hydrodynamic simulations of implosion of carbon sample using the LAPLAS scheme (shown in Fig. 4), that is driven by a beam with a circular focal spot.…”

Section: Studymentioning

confidence: 99%

Production of Carbon Samples With Extreme Physical Conditions Using Intense Heavy Ion Beams at the Facility for Antiprotons and Ion Research: Application to Planetary Physics Research

Tahir,

Bagnoud,

Neumayer

et al. 2024

Preprint

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Temperature and structure measurements of heavy-ion-heated diamond using in situ X-ray diagnostics

Lütgert,

Hesselbach,

Schörner

et al. 2024

Matter and Radiation at Extremes

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We present in situ measurements of spectrally resolved X-ray scattering and X-ray diffraction from monocrystalline diamond samples heated with an intense pulse of heavy ions. In this way, we determine the samples’ heating dynamics and their microscopic and macroscopic structural integrity over a timespan of several microseconds. Connecting the ratio of elastic to inelastic scattering with state-of-the-art density functional theory molecular dynamics simulations allows the inference of average temperatures around 1300 K, in agreement with predictions from stopping power calculations. The simultaneous diffraction measurements show no hints of any volumetric graphitization of the material, but do indicate the onset of fracture in the diamond sample. Our experiments pave the way for future studies at the Facility for Antiproton and Ion Research, where a substantially increased intensity of the heavy ion beam will be available.

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Viscous Rayleigh–Taylor instability at a dynamic interface in spherical geometry

Wang,

Sun,

Wang

et al. 2024

Physics of Fluids

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In their study, Terrones et al. [“Rayleigh–Taylor instability at spherical interfaces between viscous fluids: The fluid/fluid interface,” Phys. Fluids 32, 094105 (2020)] elucidated that investigations into the viscous Rayleigh–Taylor instability (RTI) in spherical geometry at a quiescent interface yield significant physical insights. Yet, the complexity amplifies when addressing a dynamic spherical interface pertinent to engineering and scientific inquiries. The dynamics of RTI, particularly when influenced by the Bell–Plesset effects at such interfaces, offers a rich tapestry for understanding perturbation growth. The evolution of this instability is describable by a coupled set of equations, allowing numerical resolution to trace the radius evolution and instability characteristics of a bubble akin to the implosion scenario of a fusion pellet in inertial confinement fusion scenarios. The investigation encompasses the impact of viscosity, external pressure, discrete mode, and a surface-tension-like force on the interfacial instability. In general, the oscillation of the bubble radius exhibits a decay rate that diminishes with increasing Reynolds number (Re). It is important to note that the growth of the perturbed amplitude is not only solely determined by the mechanical properties of the fluid but also by the dynamics of the interface. The low-order modal (n<20) disturbance is dominant with relatively high Reynolds numbers. There is a specific mode corresponding the maximum in amplitude of perturbation in the linear phase, and the mode decreases as the Re decreases. The application of external pressure noticeably accelerates the bubble's oscillation and impedes its shrinkage, thereby preventing the bubble from collapsing completely. The increase in external pressure also promotes the transition from the first peak to the trough of the disturbance. At higher-order modes, the fluctuation of the disturbance curve tends to be uniform. The ultrahigh-order modes require a strong enough pressure to be excited. In addition, the smaller Weber number (We) helps to accelerate the bubble oscillation and promote the fluctuation of the disturbance amplitude, but has no significant effect on the time of the disturbance peak. These findings contribute to a deeper understanding of interfacial instabilities in the context of spherical bubbles and, especially, for the dynamics of fusion capsules in inertial confinement fusion.

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Production of diamond using intense heavy ion beams at the FAIR facility and application to planetary physics

Cited by 3 publications

References 58 publications

Production of Carbon Samples With Extreme Physical Conditions Using Intense Heavy Ion Beams at the Facility for Antiprotons and Ion Research: Application to Planetary Physics Research

Production of Carbon Samples With Extreme Physical Conditions Using Intense Heavy Ion Beams at the Facility for Antiprotons and Ion Research: Application to Planetary Physics Research

Temperature and structure measurements of heavy-ion-heated diamond using in situ X-ray diagnostics

Viscous Rayleigh–Taylor instability at a dynamic interface in spherical geometry

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