Ion beam analysis of tungsten layers in EUROFER model systems and carbon plasma facing components

Ström, PetterKTH,Fusionsplasmafysik,KTH Royal Inst Technol, Sch Elect Engn, Dept Fus Plasma Phys, SE-10044 Stockholm, Sweden. (author)

QC 20171027
The tungsten enriched surface layers in two fusion-relevant EUROFER steel model samples, consisting of an iron-tungsten mixture exposed to sputtering by deuterium ions, were studied by Rutherford backscattering spectrometry and medium energy ion scattering. Exposure conditions were the same for the two samples and the total amount of tungsten atoms per unit area in the enriched layers were similar (2e15 and 2.4e15 atoms/cm2 respectively), despite slightly different initial atomic compositions. A depth profile featuring exponential decrease in tungsten content towards higher depths with 10-20 atomic percent of tungsten at the surface and a decay constant between 0.05 and 0.08 Å-1 was indicated in one sample, whereas only the total areal density of tungsten atoms was measured in the other. In addition, two different beams, iodine and chlorine, were employed for elastic recoil detection analysis of the deposited layer on a polished graphite plate from a test limiter in the TEXTOR tokamak following experiments with tungsten hexafluoride injection. The chlorine beam was preferred for tungsten analysis, mainly because it (as opposed to the iodine beam) does not give rise to problems with overlap of forward scattered beam particles and recoiled tungsten in the spectrum.

NATURVETENSKAP Fysik hsv//swe
NATURAL SCIENCES Physical Sciences hsv//eng
NATURVETENSKAP Fysik Acceleratorfysik och instrumentering hsv//swe
NATURAL SCIENCES Physical Sciences Accelerator Physics and Instrumentation hsv//eng
ERDA
EUROFER
Fusion
MEIS
Tungsten
Atoms
Carbon
Chlorine
Forward scattering
Fusion reactions
Iodine
Ion beams
Ions
Magnetoplasma
Rutherford backscattering spectroscopy
Elastic recoil detection analysis
Exposure parameters
Medium energy ion scattering
Orders of magnitude
Rutherford back-scattering spectrometry

Petersson, PerKTH,Fusionsplasmafysik,KTH Royal Inst Technol, Sch Elect Engn, Dept Fus Plasma Phys, SE-10044 Stockholm, Sweden.(Swepub:kth)u1mnanst (author)
Rubel, MarekKTH,Fusionsplasmafysik,KTH Royal Inst Technol, Sch Elect Engn, Dept Fus Plasma Phys, SE-10044 Stockholm, Sweden.(Swepub:kth)u1vrej8y (author)
Primetzhofer, DanielUppsala universitet,Tillämpad kärnfysik(Swepub:uu)danpr521 (author)
Brezinsek, S.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany. (author)
Kreter, A.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany. (author)
Unterberg, B.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany. (author)
Sergienko, G.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany. (author)
Sugiyama, K.Max Planck Inst Plasma Phys, D-85748 Garching, Germany. (author)
KTHFusionsplasmafysik (creator_code:org_t)

In:Nuclear Instruments and Methods in Physics Research Section B: Elsevier371, s. 355-3590168-583X1872-9584

By the author/editor: Ström, Petter; Petersson, Per; Rubel, Marek; Primetzhofer, Da ...; Brezinsek, S.; Kreter, A.; show more...; Unterberg, B.; Sergienko, G.; Sugiyama, K.; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Accelerator Phys ...

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