Deuterium Removal Efficiency in Tungsten as a Function of Hydrogen Ion Beam Fluence and Temperature

Zhao, Mingzhong; Zhou, Qilai; Nakata, Moeko; Togari, Akihiro; Sun, Fei; Hatano, Yuji; Yoshida, N.; Oya, Yasuhisa

doi:10.1007/978-3-319-99834-3_3

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…The pTDS profiles (dashed lines) display the sequential removal of D from traps with increasing pTDS temperature, and exhibit a sharp drop in released D flux when fixed at their peak-and-hold temperature. This D flux plotted against time instead of temperature dis-plays an exponential decay during the pTDS peak-and-hold (not shown here but similar to[15]), indicating the depopulation of traps that exhibit a signif-…”

supporting

confidence: 64%

“…In a similar experiment, Zhao et al [15] performed pTDS on W samples with 0.01 and 1 displacements per atom (dpa). The resulting full TDS profiles show that the initial release for the 0.01 dpa sample starts at a temperature well above the peak-and-hold and slightly above initial release for the 1 dpa sample.…”

Section: Comparing the Activation Energies Calculated With Density Fumentioning

confidence: 99%

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Isolating the detrapping of deuterium in heavy ion damaged tungsten via partial thermal desorption

Simmonds

Schwarz-Selinger

et al. 2019

Journal of Nuclear Materials

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Partial Thermal Desorption Spectrometry (pTDS) progressively depopulated trapped deuterium (D) from heavy-ion damaged tungsten (W) to determine spatial location and detrapping energies. W samples were prepared identically: 5 MeV Cu 2+ damaging ions (0.12 peak dpa dose) before D 2 plasma loading (10 24 D/m 2 fluence) held at 373 K. Each sample reached one of six pTDS peak-and-hold temperatures. Nuclear Reaction Analysis (NRA) measured the D spatial profile remaining after pTDS, before final TDS. NRA and TDS measured total D retention were in good agreement. NRA displayed three zones of D-populated defects: (I) near-surface (below 0.1 µm), (II) heavy-ion damage (peaked ∼1 µm), and (III) uniform intrinsic (bulk). D concentration in zone I reduced by ∼ 97% in samples with pTDS at 597 K and higher, indicating near-surface traps have low detrapping energy. The Stopping and Range of Ions in Matter (SRIM) predicts a displacement profile

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supporting

confidence: 64%

Section: Comparing the Activation Energies Calculated With Density Fumentioning

confidence: 99%