TY - JOUR
T1 - Impact of plastic deformation on retention under pure D or He high flux plasma expose
AU - Bakaeva, Anastasiia
AU - Terentyev, Dmitry
AU - Van Renterghem, Wouter
AU - Dubinko, Andrii
N1 - Score=10
PY - 2018/5/16
Y1 - 2018/5/16
N2 - The retention of deuterium (D) and helium (He) is studied in pure tungsten after high flux mono-plasma exposure. The recrystallized and plastically deformed tungsten samples are studied to clarify the impact of the material microstructure, in particular dislocation density, on the trapping and release of D and He. Thermal Desorption Spectroscopy (TDS) measurements are performed to reveal the release stages and quantify the retention. Preliminary transmission electron microscopy study was applied to clarify the microstructural modifications induced by the plasma exposure to support the discussion and conclusions. It has been demonstrated that plastic deformation causes considerable suppression of He release within the explored limit of the TDS temperature – 1300 K. This is opposite to what is found for the pure D exposure, where the plastic deformation evidently enhances the D retention, given equivalent exposure conditions in terms of surface temperature and ion fluence.
AB - The retention of deuterium (D) and helium (He) is studied in pure tungsten after high flux mono-plasma exposure. The recrystallized and plastically deformed tungsten samples are studied to clarify the impact of the material microstructure, in particular dislocation density, on the trapping and release of D and He. Thermal Desorption Spectroscopy (TDS) measurements are performed to reveal the release stages and quantify the retention. Preliminary transmission electron microscopy study was applied to clarify the microstructural modifications induced by the plasma exposure to support the discussion and conclusions. It has been demonstrated that plastic deformation causes considerable suppression of He release within the explored limit of the TDS temperature – 1300 K. This is opposite to what is found for the pure D exposure, where the plastic deformation evidently enhances the D retention, given equivalent exposure conditions in terms of surface temperature and ion fluence.
KW - Tungsten
KW - He-H exposure
KW - High flux plasma
KW - Deformation
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/29785410
U2 - 10.1016/j.nme.2018.05.014
DO - 10.1016/j.nme.2018.05.014
M3 - Article
SN - 2352-1791
VL - 15
JO - Nuclear Materials and Energy
JF - Nuclear Materials and Energy
ER -