Hard x-ray imaging using free-standing spherically bent crystals

Faenov, A. Ya.; Pikuz, T. A.; Avrutin, V.; Izyumskaya, N.; Shabel'nikov, L.G.; Shulakov, E. V.; Kyrala, G. A.

doi:10.1063/1.1537858

Cited by 5 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3d), the focal distance has been changed to obtain a constant magnification M t =M s =2 demonstrating that this setup can be adapted for given specifications. These simulations confirm that the Laue spherical crystal can be used as a stigmatic imager for objects in transmission, thus explaining the experimental results in [1]…”

Section: Imaging Objects Using a Spherical Laue Crystalsupporting

confidence: 81%

See 1 more Smart Citation

Stigmatic X-ray imaging using a single spherical Laue crystal

Río

Bianchi

Pikuz

et al. 2013

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

We propose a crystal configuration using a single Laue spherical crystal for imaging applications. A crystal in Laue geometry set to focus a divergent beam in the meridional (diffraction) plane, but does not focus in the sagittal plane. A transmission object placed in the beam is imaged with different horizontal and vertical aspect ratio, but it is possible to find a configuration with similar aspect ratio. This system is studied using ray tracing, which permit to reproduce preliminary experimental data [1]. The concept of a stigmatic focusing by a single optical element may have applications in imaging, like in transmission microscopy or for hard X-ray backlighting and self-imaging in high energy density plasma experiments. Inertial confinement fusion experiments and large tokamak projects such as ITER may benefit from this optical configuration.

show abstract

Section: Imaging Objects Using a Spherical Laue Crystalsupporting

confidence: 81%

“…Solid line: incident beam is polychromatic, dotted line: incident beam is monochromatic (E=22160 eV) and dashed line: beam evolution without crystal. b) Crystal setup[1] in the meridional plane, including object and image.…”

mentioning

confidence: 99%

Stigmatic X-ray imaging using a single spherical Laue crystal

Río

Bianchi

Pikuz

et al. 2013

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…Multi-keV x-rays can be imaged using bent crystals as diffracting optics in either reflecting [1,[25][26][27] or transmitting [28] geometries, which are suitable for moderate or high photon energies, respectively. X-ray diffraction can be understood from the viewpoint of geometric, or kinematic, theory, whereby the diffracted wave is the sum of constructively interfering waves diffracted by each atom in a lattice, or by dynamic theory whereby the propagating wave interacts with dipoles (oscillating electrons) in the material according to Maxwell's equations [29].…”

Section: Overview Of Crystals As X-ray Opticsmentioning

confidence: 99%

Characterization of a spherically bent quartz crystal for Kα x-ray imaging of laser plasmas using a focusing monochromator geometry

Kugland¹,

Constantin²,

Döppner³

et al. 2011

J. Inst.

View full text Add to dashboard Cite

We have measured the key spectrometric properties (peak reflectivity, reflection curve width, and Bragg angle offset) of a spherically bent quartz 200 crystal using the x-ray emission from a laser-produced Ar plasma. This crystal can image Ar Kα x-rays at near-normal incidence (θ B ≈ 81 degrees); our technique operates the same crystal as a high-throughput focusing monochromator on the Rowland circle at angles far from normal incidence (θ B ≈ 68 degrees) to make a reflection curve with He-like x-rays from the same laser plasma. This approach, which is applicable to many commonly imaged x-ray emission lines and corresponding spherically bent crystals, permits the experimentalist to obtain an in-situ crystal characterization in the same reflection order as that used for operation.

show abstract

X-ray tests of a two-dimensional stigmatic imaging scheme with variable magnifications

Lü

Bitter

Hill

et al. 2014

Review of Scientific Instruments

View full text Add to dashboard Cite

A two-dimensional stigmatic x-ray imaging scheme, consisting of two spherically bent crystals, one concave and one convex, was recently proposed [M. Bitter et al., Rev. Sci. Instrum. 83, 10E527 (2012)]. The Bragg angles and the radii of curvature of the two crystals of this imaging scheme are matched to eliminate the astigmatism and to satisfy the Bragg condition across both crystal surfaces for a given x-ray energy. In this paper, we consider more general configurations of this imaging scheme, which allow us to vary the magnification for a given pair of crystals and x-ray energy. The stigmatic imaging scheme has been validated for the first time by imaging x-rays generated by a micro-focus x-ray source with source size of 8.4 μm validated by knife-edge measurements. Results are presented from imaging the tungsten Lα1 emission at 8.3976 keV, using a convex Si-422 crystal and a concave Si-533 crystal with 2d-spacings of 2.21707 Å and 1.65635 Å and radii of curvature of 500 ± 1 mm and 823 ± 1 mm, respectively, showing a spatial resolution of 54.9 μm. This imaging scheme is expected to be of interest for the two-dimensional imaging of laser produced plasmas.

show abstract

Hard x-ray imaging using free-standing spherically bent crystals

Cited by 5 publications

References 30 publications

Stigmatic X-ray imaging using a single spherical Laue crystal

Stigmatic X-ray imaging using a single spherical Laue crystal

Characterization of a spherically bent quartz crystal for Kα x-ray imaging of laser plasmas using a focusing monochromator geometry

X-ray tests of a two-dimensional stigmatic imaging scheme with variable magnifications

Contact Info

Product

Resources

About