Time-resolved ten-channel monochromatic imaging of inertial confinement fusion plasmas

Uschmann, I.; Fujita, Kazuhisa; Niki, I.; Butzbach, R.; Nishimura, Hiroaki; Funakura, Jiro; Nakai, M.; Förster, E.; Mima, Kunioki

doi:10.1364/ao.39.005865

Cited by 35 publications

(14 citation statements)

References 15 publications

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“…Spherically-bent [3] or toroidally-bent [4] Bragg crystals can be used as imaging elements, and an array of such crystals -tuned for different energies through slight variations in Bragg angles -can provide a number of quasi-monochromatic images at discrete energies across a desired range [5]. A simpler approach [6] uses an array of pinholes as the imaging element, and uses a flat Bragg mirror to provide energy dispersion.…”

Section: Introductionmentioning

confidence: 99%

Multispectral x-ray imaging with a pinhole array and a flat Bragg mirror

Koch

Barbee

Izumi

et al. 2005

Review of Scientific Instruments

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We describe a multiple monochromatic x-ray imager designed for implosion experiments. This instrument uses an array of pinholes in front of a flat multilayered Bragg mirror to provide many individual quasi-monochromatic xray pinhole images spread over a wide spectral range. We discuss design constraints and optimizations, and we discuss the specific details of the instrument we have used to obtain temperature and density maps of implosion plasmas.1

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Section: Introductionmentioning

confidence: 99%

Multispectral x-ray imaging with a pinhole array and a flat Bragg mirror

Koch

Barbee

Izumi

et al. 2005

Review of Scientific Instruments

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“…Second, a monochromaticx-ray framing camera ͑M-XFC͒ was used to provide temporally gated images of Ar 17ϩ He␤ and Ar 18ϩ Ly␤ (1s -3p; 3.94 keV͒ lines. 4 Toroidally bent Ge ͑311͒ and Si ͑311͒ crystals were used as imaging devices for He␤ and Ly␤, respectively. Spatial resolution was measured to be 10 m. Spectral windows of these crystals were set to be 19.0 eV for He␤ and 34.9 eV for Ly␤, corresponding to typical linewidth of these line emissions.…”

Section: X-ray Spectroscopic Diagnosticsmentioning

confidence: 99%

Temporal evolution of temperature and density profiles of a laser compressed core (invited)

Ochi

Golovkin

Mancini

et al. 2003

Review of Scientific Instruments

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Articles you may be interested inElectron temperature and density characterization using L-shell spectroscopy of laser irradiated buried iron layer targets Phys. Plasmas 21, 082702 (2014); 10.1063/1.4892263 X-ray spectroscopy for high energy-density X pinch density and temperature measurements (invited) Rev. Sci.A spectroscopy diagnostic of plasma gradients in inertial confinement fusion imploded cores (abstract) Rev. Sci.Temporal evolutions of the electron temperature and density profiles in the inertial confinement fusion core plasma were obtained through a combination of experimental technology to create a uniform core, diagnostics developments, and a data analysis technique to obtain an optimal solution. In the experiment, time-and space-resolved x-ray spectroscopic measurements were carried out; an x-ray streak spectrograph and a monochromatic x-ray framing camera provided temporal evolution of x-ray spectrum and monochromatic emissivities, respectively. The spectrum and emissivity profile were iteratively fitted as a function of electron temperature, density, and space. Then, optimal solutions were successfully extracted with the help of Niched-Pareto genetic algorithm. Temporal behavior between those data is well corrected by comparing spatially and spectrally integrated intensities. The resultant profiles were compared with hydrocode simulations, showing that spatially averaged electron temperature and density evolutions are well replicated by the simulations, but their detail spatial profiles do not agree with them.

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“…Bent crystal imaging techniques can be applied to obtain high resolution images of x-ray self-emission in the 1-6 keV range from a bright x-ray source such as a 20-mm-long ZR z-pinch plasma [28]. An array of toroidally-bent crystals could be used to obtain gated, two-dimensional images of the z-pinch plasma [29]. Crystal damage from debris and high x-ray flux will be an issue in instrument design.…”

Section: Ii3 Monochromatic Imaging Of Z Pinchesmentioning

confidence: 99%

Diagnostics development plan for ZR.

Hanson¹

2003

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The Z Refurbishment (ZR) Project is a program to upgrade the Z machine at SNL with modern durable pulsed power technology, providing additional shot capacity and improved reliability as well as advanced capabilities for both pulsed x-ray production and high pressure generation. The development of enhanced diagnostic capabilities is an essential requirement for ZR to meet critical mission needs. This report presents a comprehensive plan for diagnostic instrument and infrastructure development for the first few years of ZR operation. The focus of the plan is on: (1) developing diagnostic instruments with high spatial and temporal resolution, capable of low noise operation and survival in the severe EMP, bremsstrahlung, and blast environments of ZR; and (2) providing diagnostic infrastructure improvements, including reduced diagnostic trigger signal jitter, more and flexible diagnostic line-of-sight access, and the capability for efficient exchange of diagnostics with other laboratories. This diagnostic plan is the first step in an extended process to provide enhanced diagnostic capabilities for ZR to meet the diverse programmatic needs of a broad range of defense, energy, and general science programs of an international user community into the next decade. ZR Diagnostics Development Plan ________________________________________________________________________ 4 AcknowledgementsThe author would like to thank

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Time-resolved ten-channel monochromatic imaging of inertial confinement fusion plasmas

Cited by 35 publications

References 15 publications

Multispectral x-ray imaging with a pinhole array and a flat Bragg mirror

Multispectral x-ray imaging with a pinhole array and a flat Bragg mirror

Temporal evolution of temperature and density profiles of a laser compressed core (invited)

Diagnostics development plan for ZR.

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