Soft X-ray spectromicroscopy development for materials science at the Advanced Light Source

Warwick, Tony; Ade, Harald; Hitchcock, Adam P.; Padmore, Howard; Rightor, E. G.; Tonner, B. P.

doi:10.1016/s0368-2048(97)00026-1

Cited by 48 publications

(31 citation statements)

References 8 publications

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“…This picture is recorded at a wavelength of 2.07nm(600eV) with an exposure time of 1 sec. Note that the rings are smaller at 600eV than 500eV, as in figure 3-7, due to the shorter wavelength and thus reduced divergence angle as seen in equation (3)(4)(5)(6)(7)(8)(9)(10). 46…”

Section: -8mentioning

confidence: 98%

“…The SXR region will be defined as ranging from approximately 200eV to 1keV (6 nm- fall within the EUV and SXR region. These edges create the ability to perform elemental and chemical identification [10].…”

Section: Motivationmentioning

confidence: 99%

“…The time rate of change of the energy of an electron in a uniform magnetic field is 0 as shown in equation (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) …”

Section: Higher Harmonicsmentioning

confidence: 99%

“…This solution also found that the velocity in the transverse direction (v x ) was sinusoidal. Inspecting equation (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13) shows how this would create a sinusoidal γ, and thus violate conservation of electron energy.…”

Section: Higher Harmonicsmentioning

confidence: 99%

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Tunable coherent radiation at soft X-ray wavelengths: Generation and interferometric applications

Rosfjord

2004

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The availability of high power, spectrally and spatially coherent soft x-rays (SXR) would facilitate a wide variety of experiments as this energy region covers the primary resonances of many magnetic and biological materials. Specifically, there are the carbon and oxygen K-edges that are critical for biological imaging in the water window and the L-edges of iron, nickel, and cobalt for which imaging and scattering studies can be performed.A new coherent soft X-ray branchline at the Advanced Light Source has begun operation (beamline 12.0.2). Using the third harmonic from an 8 cm period undulator, this branch delivers coherent soft x-rays with photon energies ranging from 200eV to 1keV. This branchline is composed of two sub-branches one at 14X demagnification and the other 8X demagnification. The former is optimized for use at 500eV and the latter at 800eV. Here the expected power from the third harmonic of this undulator and the beamline design and characterization is presented. The characterization includes measurements on available photon flux as well as a series of double pinhole experiments to determine the coherence factor with respect to transverse distance. The first high quality Airy patterns at SXR wavelengths are created with this new beamline.The operation of this new beamline allows for interferometry to be performed in the SXR region. Here an interferometric experiment designed to directly determine the index of refraction of a material under test is performed.Measurements are first made in the EUV region using an established beamline (beamline12.0.1) to measure silicon, ruthenium and tantalum silicon nitride. This work is then extended to the SXR region using beamline 12.0.2 to test chromium and vanadium.

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Section: -8mentioning

confidence: 98%

Section: Motivationmentioning

confidence: 99%

“…The time rate of change of the energy of an electron in a uniform magnetic field is 0 as shown in equation (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) …”

Section: Higher Harmonicsmentioning

confidence: 99%

Section: Higher Harmonicsmentioning

confidence: 99%

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Tunable coherent radiation at soft X-ray wavelengths: Generation and interferometric applications

Rosfjord

2004

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“…[17][18][19] Recently, analytical soft X-ray microscopy has been developed and applied to study polymers. [20][21][22][23] The scanning transmission X-ray microscope (STXM) [24][25][26][27] at the Advanced Light Source (ALS) used in this work provides images with better than 100 nm spatial resolution and a photon energy resolution of about 100 meV. Near-edge X-ray absorption fine structure (NEXAFS) spectral signals 28 are the basis for chemical speciation.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Compositional Mapping of Core−Shell Polymer Microspheres by Soft X-ray Spectromicroscopy

Koprinarov

Hitchcock

et al. 2001

Macromolecules

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Core-shell polymer microspheres have been prepared by a two-step precipitation polymerization. These microspheres consist of 3.2 µm polydivinylbenzene-55 (DVB55) cores coated with ∼0.4-0.9 µm wide shells composed of poly(DVB55-co-EDMA), a random copolymer of DVB55 and ethylene glycol dimethyl acrylate (EDMA). The chemical composition, core-shell morphology, and porosity of these structured microspheres have been studied quantitatively with scanning transmission X-ray microscopy (STXM) at a spatial resolution of 100 nm. Images recorded at selected energies through the C 1s absorption region were analyzed using singular value decomposition to obtain quantitative maps of the DVB55 and EDMA components. The EDMA concentration in the shell determined by STXM was found to be in good agreement with that predicted from the comonomer composition over the range of 10-90% EDMA. The precision of chemical quantification at high spatial resolution is shown to be adequate for STXM to be useful in guiding the development of structured polymeric systems for particular applications.

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Soft x-ray spectroscopy and imaging of interfacial chemistry in environmental specimens

Tonner

Droubay

Denlinger

et al. 1999

Surf. Interface Anal.

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Interfaces between minerals and water, and minerals and microbes, are chemically complex and have traditionally been considered beyond the capabilities of surface science techniques, except for model systems under controlled laboratory conditions. We report on some advances in soft xray spectroscopy and imaging that make it possible to extract meaningful chemical information about interfaces of specimens that have complex histories, involving environmental exposure. These measurements utilize x-ray absorption spectroscopy, in combination with spatial resolution, in a technique called x-ray spectro-microscopy. Examples are drawn from attempts at Mn and Fe speciation of biologically produced minerals, bio-corrosion deposits, and clays.

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Soft X-ray spectromicroscopy development for materials science at the Advanced Light Source

Cited by 48 publications

References 8 publications

Tunable coherent radiation at soft X-ray wavelengths: Generation and interferometric applications

Tunable coherent radiation at soft X-ray wavelengths: Generation and interferometric applications

Quantitative Compositional Mapping of Core−Shell Polymer Microspheres by Soft X-ray Spectromicroscopy

Soft x-ray spectroscopy and imaging of interfacial chemistry in environmental specimens

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