Research output: Contribution to journal › Article › peer-review
Improved carbon migration modelling with the ERO code. / Van Hoey, Olivier; Kirschner, Andreas; Bjorkas, Carolina; Borodin, Dmitry; Matveev, Dmitry; Uytdenhouwen, Inge; Van Oost, Guido; Massaut, Vincent (Peer reviewer).
In: Journal of Nuclear Materials, Vol. 438, 17.01.2013, p. S891-S894.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Improved carbon migration modelling with the ERO code
AU - Van Hoey, Olivier
AU - Kirschner, Andreas
AU - Bjorkas, Carolina
AU - Borodin, Dmitry
AU - Matveev, Dmitry
AU - Uytdenhouwen, Inge
AU - Van Oost, Guido
A2 - Massaut, Vincent
N1 - Score = 10
PY - 2013/1/17
Y1 - 2013/1/17
N2 - Material migration is a crucial issue in thermonuclear fusion devices. To study carbon migration, 13CH4 has been injected through a polished graphite roof-like test limiter in the TEXTOR scrape-off layer. The interpretation of the experimental 13C deposition patterns on the roof limiter surface has been done with the ERO impurity transport code. To reproduce the very low experimental 13C deposition efficiencies with ERO, an enhanced re-erosion mechanism for re-deposited carbon had to be assumed in previous studies. However, erosion by hydrogenic species produced during dissociation of injected 13CH4 was not taken into account by ERO in these studies. This additional erosion could maybe explain the very low experimental 13C deposition efficiencies. Therefore, it is now taken into account in ERO. Also more realistic physical sputtering yields and hydrocarbon reflection probabilities have been implemented in ERO. The simulations with these improvements included clearly confirm the need for enhanced re-erosion of re-deposited carbon.
AB - Material migration is a crucial issue in thermonuclear fusion devices. To study carbon migration, 13CH4 has been injected through a polished graphite roof-like test limiter in the TEXTOR scrape-off layer. The interpretation of the experimental 13C deposition patterns on the roof limiter surface has been done with the ERO impurity transport code. To reproduce the very low experimental 13C deposition efficiencies with ERO, an enhanced re-erosion mechanism for re-deposited carbon had to be assumed in previous studies. However, erosion by hydrogenic species produced during dissociation of injected 13CH4 was not taken into account by ERO in these studies. This additional erosion could maybe explain the very low experimental 13C deposition efficiencies. Therefore, it is now taken into account in ERO. Also more realistic physical sputtering yields and hydrocarbon reflection probabilities have been implemented in ERO. The simulations with these improvements included clearly confirm the need for enhanced re-erosion of re-deposited carbon.
KW - fusion
KW - ERO code
KW - carbon
KW - hydrogen
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_131278
UR - http://knowledgecentre.sckcen.be/so2/bibref/10586
U2 - 10.1016/j.jnucmat.2013.01.193
DO - 10.1016/j.jnucmat.2013.01.193
M3 - Article
VL - 438
SP - S891-S894
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
ER -
ID: 147075