Flux dependence of carbon erosion and implication for ITER
In a collaboration of eight experiments the dependence of the chemical erosion yield of carbon on the ion flux, U, was established to U_0.54 at high ion fluxes. With this flux dependence a comprehensive description for chemical erosion is available as function of energy, temperature and flux. With this description the erosion and re-deposition of carbon in the ITER divertor can be calculated using the ITER steady-state plasma scenario and the ERO code. The resulting gross and net erosion rates during steady-state phase of discharges are compared to previous estimates using a constant erosion yield of 1.5%. The use of the complete parameter dependence results in an order of magnitude lower erosion, and, accordingly, of the T codeposition inventory.
Bibliographic Reference: An article published in: Journal of Nuclear Materials 337-339 (2005) 970-974
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://probe.usp.br/cgi-bin/sciserv.pl?collection=journals&journal=00223115
Record Number: 200518085 / Last updated on: 2005-04-19
Original language: en
Available languages: en