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The INE-Beamline for actinide science at ANKA
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Image of FIG. 1.
FIG. 1.

Floor plan of the ANKA synchrotron radiation facility at KIT North Campus. The INE-Beamline is situated in the north (arrow) – east sector of the storage ring.

Image of FIG. 2.
FIG. 2.

Schematic drawing of the INE-Beamline optic section and experimental station. The area marked in yellow can be operated as a controlled area for the investigation of radioactive samples.

Image of FIG. 3.
FIG. 3.

Setup for low energy measurements at the INE-Beamline. The first ionization chamber (IC1) is flanged directly onto the end of the beam pipe separated by a 25 μm Kapton window. The sample and both ionization chamber volumes are connected without windows. The snout of the SSD can be inserted in the hollow pipe near the center of the image.

Image of FIG. 4.
FIG. 4.

(a) Drawing of the standard sample holder used at the INE-Beamline (right), which is a windowed stainless steel container of 70 mm outer diameter with a collar at the top equipped with threaded screw holes for attaching the lid and a circular well for a Viton O-ring. The windows are covered with, e.g., 50 μm thick Kapton foil. The round holes are either plugged or fitted with gas connections, where inert gas conditions are required. The lid (left) is screwed onto the holder air tight and can be equipped with varying inserts, in this example a Plexiglas holder with bore holes for mounting up to five 0.5 mm diameter vials; (b) Design of an electrochemical cell, which is integrated into the lid of the standard INE-Beamline sample cell. 1. working electrode position, 2. reference electrode position, 3. auxiliary electrode position, 4. Kapton film, 5. Al frame, 6. Viton O-ring, 7. Plexiglas cell body, 8. Viton O-ring for the Plexiglas housing (14), 9. screw hole for the standard sample holder (15), 10. screw hole for the Plexiglas housing, 11. gas outlet, 12. gas inlet, 13. adapter system for electrical connectors, 14. Plexiglas housing for cables between electrodes and connectors, 15. standard sample holder.

Image of FIG. 5.
FIG. 5.

Sn and Sb L emission lines of a Sb2O5/SnCl2 mixture recorded with (a) the HRXES spectrometer and (b) the conventional LEGe solid state detector at the INE-Beamline.

Image of FIG. 6.
FIG. 6.

Pu L3-XANES spectra of Pu(V)aq (1), Pu(V)aq spiked with seeding PuO2 colloids (2) and NaOH (3) and fresh PuO2(am) precipitate (4) measured as reference.

Image of FIG. 7.
FIG. 7.

(Left) Pu L3-EXAFS Fourier transform spectra and fit results in R-space (not phase shift corrected) of samples (1)–(3); (right) k2-weighted data, backtransformed fit and filtered data in k-space.

Image of FIG. 8.
FIG. 8.

(a) Pu M5-XANES spectra of a 65 nm PuO2 film as prepared (black line) and exposed to deionized water for 24 h (red line). The inset shows the inner containment of the sample cell assembly with a 100 nm Si3N4 membrane window used for low-E measurements at the INE-Beamline; (b) Pu M5-XANES (PuO2_100 nm) compared to HERFD-XANES spectra recorded with 0.5 m and 1 m distance between analyzer crystal and detector (PuO2_100 nm_0.5 m, PuO2_100 nm_1 m).

Image of FIG. 9.
FIG. 9.

P K-XANES of PS(NMeNCHPy)3 (L 1 ) and its synthesis precursor (L 4 ) and its Sm3+ and Pu3+ coordination compounds. Structures are indicated in the inset, right. Results of least-square fits to the XANES using a combination of two (L 4 ) or three Gauss functions and an arctan step function are indicated. See Sec. VII B for details.

Image of FIG. 10.
FIG. 10.

(a) Microscope image of a thin section taken from a corroded cement sample exhibiting an U-rich aggregate (circle); (b) Uranium distribution (L α fluorescence intensity map) recorded in an area surrounding the aggregate marked in a) (scale in mm).

Image of FIG. 11.
FIG. 11.

U L3-μ-XANES spectrum of the U-rich aggregate shown in Fig. 10 (1) and of a bulk powdered cement sample (2), compared to the crystalline references indicated.

Image of FIG. 12.
FIG. 12.

Sketch of the future CAT-ACT beamline at ANKA with two in-line experimental stations for CATalysis research and ACTinide science. Yellow marks the experimental hutches, where experiments on radioactive materials are performed.


Generic image for table
Table I.

ANKA storage ring and INE-Beamline bending magnet (beam port 3.2-5) parameters.

Generic image for table
Table II.

INE-Beamline characteristics.

Generic image for table
Table III.

Selected actinide nuclides, their European exemption limit (EL), their maximum allowable amount within the 1.0 × 10+6 times the EL (INE-Beamline license) and the activity of a generic transmission sample containing 7.7 mg nuclidea. None of the generic sample activities are limited by the INE-Beamline license. U-238 and Th-232 are not listed as their allowable amounts exceed by far those relevant for XAFS measurements.

Generic image for table
Table IV.

Techniques available at the INE-Beamline and their information content.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The INE-Beamline for actinide science at ANKA