Atomic Data for Vapour Shielding in Fusion Devices
Closed for Proposals
Project Type
Coordinated Research ProjectProject Code
F43024
CRP
2180
Approved Date
6 December 2018Project Status
ClosedStart Date
5 December 2018Expected End Date
30 June 2023Completed Date
24 November 2025Participating Countries
Australia, China, Spain, India, Italy, North Macedonia, Kingdom of the Netherlands, Syrian Arab Republic, United States of AmericaObjectives
To increase the capability of Member States to undertake fusion plasma and fusion materials modelling by supporting the development of novel techniques in fusion reactor design through the enhancement of the global knowledgebase of atomic and molecular data for vapour shielding modelling, with a particular focus on liquid metals.
Specific Objectives
Assemble, evaluate and recommend atomic and molecular data needed for the modelling of vapour shielding, particularly cross sections for ionization, recombination, charge exchange (CX), rovibrational excitation (for molecules) and momentum transfer. Also of concern are data for radiative processes inside vapours, including line shapes, emission and absorption coefficients, radiative cooling rates, stopping power, and other radiative properties of warm dense matter. Comparison of theory with experiment should be achieved wherever possible.
Assess the impact of impurities such as O, C and N in their interactions with liquid metal species, particularly Li.
Assemble, evaluate and recommend relevant data on metal hydrides for vapour shielding models, particularly those involving Li and Sn.
Investigate the effect of surface chemistry, especially hydrogen co-deposition, on sputtering and evaporation of plasma-facing materials.
Impact
The CRP increased activities in the MSs in the field of fundamental research of Liquid Metal vapour processes and underlying physics. These activities established collaborations within the CRP participants. During the CRP, there was a great increase in knowledge transfer and data sharing between the participating MSs. Resulted data from the CRP research was disseminated through peer-reviewed publications and IAEA databases. These two databases were designed and created during the course of this CRP and other activities of the AMD Unit: CollisionDB focuses to plasma-particle collisions, and pwiDB disseminates data relevant for plasma-wall interactions. CRP participants discussed about a proposal to establish a new Working Group focusing to processes with liquid metals relevant for fusion.
Relevance
CRP produced peer-reviewed data not existing before for processes crucial for modelling of vapour shielding phenomena with Liquid Metals. These comprised of i) cross sections for ionization, excitation, charge exchange on electrons and hydrogen ions with Liquid Metal ions and molecules, and ii) H, D, D2 impact plasma-wall interactions on Liquid Metal surfaces.