Ion beam heated target simulations for warm dense matter physics and inertial fusion energy

Barnard, J.J.; Armijo, Julien; Bailey, David; Friedman, A.; Bieniosek, F.M.; Henestroza, E.; Kaganovich, Igor; Leung, P. T.; Logan, B.G.; Marinak, M. M.; More, R.M.; Ng, S.; Penn, G.; Perkins, L.J.; Veitzer, Seth; Wurtele, J. S.; Yu, S.S.; Zylstra, A. B.

doi:10.1016/j.nima.2009.03.221

Cited by 18 publications

(10 citation statements)

References 20 publications

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“…here, q 0 is in unit of g/cm 3 and r 0 is in unit of cm. There are two regimes: (1) the hydrodynamic regime for T ( T cr , in which the deposited energy just causes hydrodynamic expansion of the converter, and (2) the radiative regime for T ) T cr , in which most of the energy is radiated and hydrodynamic expansion is small.…”

Section: Converter Modelmentioning

confidence: 99%

“…Heavy ion accelerator is a very promising choice as a reactor driver for inertial confinement fusion because of its high efficiency, excellent repetition rate, final focus and chamber solutions [2,3]. In fuel target implosion, ICF has two means of implosion, namely, direct-driven scheme and indirect-driven scheme [4].…”

Section: Introductionmentioning

confidence: 99%

“…In the latter scheme, the beam energy is first converted into soft X-ray which is then used to implode the fusion pellet [5,6]. Indirect drive has relatively low intrinsic coupling efficiency (ratio of fuel kinetic energy to beam energy) because of the energy penalty in increasing the temperature of the hohlraum walls, but indirect drive targets have intrinsically high uniformity in capsule illumination and are of practical importance [3].The current baseline targets for heavy ion beam drivers are two-sided indirect drives. As shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of physical parameters in ion-beam-heated converters

2015

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The conversion of ion beam energy into thermal X-ray radiation by means of stretched cylindrical volumes is discussed. Converting the kinetic energy of heavy ion beam into radiation energy at high efficiency is important for heavy ion fusion. The conversion efficiency between different materials, low-Z and high-Z material, is compared and simulations have been performed by SRIM code. Our results show high-z materials are superior converters. It is found to achieve a high conversion efficiency, a deposition power higher than 10 16 W/cm 2 is required.

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Section: Converter Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of physical parameters in ion-beam-heated converters

2015

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“…This novel passive focusing scheme opens the possibility of collimating or focusing ion beams to a small spot size since the focusing becomes stronger as the beam radius reduces. Applications may include focusing intense beams on the X-target for fast ignition-driven fusion energy [7], injectors for compact proton accelerators for tumor therapy [8], and ion beam-driven warm dense matter studies [9]. The stack of thin foils can be made from aluminum and manufactured at low cost.…”

Section: Introductionmentioning

confidence: 99%

Scattering effects in passive foil focusing of ion beams

Yuen

Lund

Barnard

et al. 2015

Phys. Rev. ST Accel. Beams

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A stack of thin, closely spaced conducting foils has been investigated by Lund et al. [Phys. Rev. ST Accel. Beams 16, 044202 (2013)] as a passive focusing lens for intense ion beams. The foils mitigate spacecharge defocusing forces to enable the beam self-magnetic field to focus. In this study, we analyze possible degradation of focusing due to scattering of beam ions resulting from finite foil thickness using an envelope model and numerical simulations with the particle-in-cell code WARP. Ranges of kinetic energy where scattering effects are sufficient to destroy passive focusing are quantified. The scheme may be utilized to focus protons produced in intense laser-solid accelerator schemes. As an example, the spot size of an initially collimated 30 MeV proton beam with initial rms radius 200 μm, perveance Q ¼ 1.8 × 10 −2 , and initial transverse emittance ε x;rms ¼ 0.87 mm mrad propagating through a stack of 6.4 μm thick foils, spaced 100 μm apart, gives a 127.5 μm spot with scattering and a 81.0 μm spot without scattering, illustrating the importance of including scattering effects.

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“…For warm dense matter and ion-beam-driven inertial fusion experiments [1][2], high current pulsed ion beams are used to heat and compress a target of interest [3][4][5]. While many beams will be needed to achieve inertial fusion, current experiments aim at the development of a single beam of heavy ions such as K + or Li + (here, "heavy" is understood in comparison to the mass of a proton).…”

Section: Introductionmentioning

confidence: 99%

Dense Metal Plasma in a Solenoid for Ion Beam Neutralization

Anders

Kauffeldt²,

Окс

et al. 2011

IEEE Trans. Plasma Sci.

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Abstract-Space-charge neutralization is required to compress and focus a pulsed, high-current ion beam on a target for warm dense matter physics or heavy ion fusion experiments. We described approaches to produce dense plasma in and near the final focusing solenoid through which the ion beam travels, thereby providing an opportunity for the beam to acquire the necessary space-charge compensating electrons. Among the options are plasma injection from pulsed vacuum arc sources located outside the solenoid, and using a high current (> 4 kA) pulsed vacuum arc plasma from a ring cathode near the edge of the solenoid. The plasma distribution is characterized by photographic means, by an array of movable Langmuir probes, by a small single probe, and by evaluating Stark broadening of the Balmer H  spectral line. In the main approach described here, the plasma is produced at several cathode spots distributed azimuthally on the ring cathode. It is shown that the plasma is essentially hollow, as determined by the structure of the magnetic field, though the plasma density exceeds 10 14 cm -3 in practically all zones of the solenoid volume if the ring electrode is placed a few centimeters off the center of the solenoid. The plasma is non-uniform and fluctuating, however, since its density exceeds the ion beam density it is believed that this approach could provide a practical solution to the space charge neutralization challenge.2

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Ion beam heated target simulations for warm dense matter physics and inertial fusion energy

Cited by 18 publications

References 20 publications

Investigation of physical parameters in ion-beam-heated converters

Investigation of physical parameters in ion-beam-heated converters

Scattering effects in passive foil focusing of ion beams

Dense Metal Plasma in a Solenoid for Ion Beam Neutralization

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