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Numerical simulation study of impurity B transport during real-time B powder injection in EAST
- Source :
- Nuclear Materials and Energy, Vol 26, Iss, Pp 100937-(2021)
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- To understand the beneficial effects of impurity boron (B) on the plasma, the transport of B species in both atomic and ionic states in the edge plasma and the ensuing evolution of the background plasma are simulated during real-time B powder injection by using two-dimensional fluid code SOLPS-ITER. The initial background plasma profiles for the simulation are reconstructed based on an EAST upper-single null discharge (shot No. 70601). With the injection rate of B atoms, 4.0 × 1021 atoms/s, the simulation shows that effective charge number is less than 1.1 at the inner boundary R - Rsep = −5.2 cm (background plasma density, 5.1 × 1019 m−3) at the outer mid-plane indicating that the B impurity does not have much influence on the energy confinement. The present work finds that the impurity B exhibits very specific features in the edge plasma, mostly present in the narrow region just outside the separatrix. The particular distribution pattern can reduce the heat flux greatly, leading to the divertor detachment. The divertor detachment can be achieved easily under an injection rate of B powder in a reasonable range. This study suggests that the impurity B has a promising potential application in future tokamaks.
- Subjects :
- Nuclear and High Energy Physics
Work (thermodynamics)
Materials science
Tokamak
Detachment
Materials Science (miscellaneous)
01 natural sciences
Molecular physics
Effective nuclear charge
SOLPS-ITER
010305 fluids & plasmas
law.invention
Edge plasma
Impurity
law
Boron powder injection
0103 physical sciences
010302 applied physics
Range (particle radiation)
Radiation
Divertor
Plasma
lcsh:TK9001-9401
Nuclear Energy and Engineering
Heat flux
lcsh:Nuclear engineering. Atomic power
Subjects
Details
- ISSN :
- 23521791
- Volume :
- 26
- Database :
- OpenAIRE
- Journal :
- Nuclear Materials and Energy
- Accession number :
- edsair.doi.dedup.....1078c1d4b42b83cf3bbed343bc40838a