EPS 2019

P2.1012 Analysis of pumping conditions in DEMO-FNS

9 Jul 2019, 14:00

2h

Building U6 (University of Milano-Bicocca UNIMIB)

MCF Poster P2

Speaker

A.S. Kukushkin (EPS 2019)

Description

See full abstract here
http://ocs.ciemat.es/EPS2019ABS/pdf/P2.1012.pdf

DEMO-FNS is a tokamak-based fusion neutron source project being developed in Russia [1]. Issues of energy removal from DEMO-FNS were considered in [2], [3] in the "closed box" [4] approximation where the external sources and sinks of the particles, such as gas puffing and pumping, are essentially neglected. In the present paper we consider particle balance in the edge plasma, in particular, for helium that is an intrinsic reaction product, taking into account the realistic pumping speed, gas puff and He production rate. We use the SOLPS4.3 code suite [5] for 2D modelling of the edge plasma transport in the realistic geometry of the double-null magnetic configuration. The plasma consists of the D (representing both D and T), He and Ne ions and atoms and D2 molecules. The results provide the data necessary for expanding parameterization of the separatrix plasma parameters [3] by inclusion of the He-related quantities, such as the He density at the separatrix and the He atom influx to the core. This provides the more comprehensive set of the boundary conditions for the core plasma modelling in the framework of the integrated model [3].
[1] B. V. Kuteev et al., "Status of DEMO-FNS development," Nucl. Fusion, vol. 57, no. 7, p. 076039 (8pp), 2017.
[2] A. S. Kukushkin, V. Y. Sergeev, and B. V. Kuteev, "Preliminary results of divertor modelling for DEMO-FNS reactor," J. Phys. Conf. Ser., vol. 907, no. 1, p. 012012 (5pp), 2017.
[3] A. Y. Dnestrovskiy, A. S. Kukushkin, B. V. Kuteev, and V. Y. Sergeev, "Integrated modelling of core and divertor plasmas for DEMO-FNS hybrid facility," Nucl. Fusion, vol. submitted, 2019.
[4] A. A. Pshenov, A. S. Kukushkin, and S. I. Krasheninnikov, "On detachment asymmetry and stability," Phys. Plasmas, vol. 24, no. 7, p. 072508 (10pp), 2017.
[5] A. S. Kukushkin, H. D. Pacher, V. Kotov, G. W. Pacher, and D. Reiter, "Finalizing the ITER divertor design: The key role of SOLPS modeling," Fusion Eng. Des., vol. 86, no. 12, pp. 2865­2873, 2011.