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Advanced Performance of a Gas Dynamic Trap with ECRH and End Cells

Author: Arthur W. Molvik
Requested Type: Poster Only
Submitted: 2014-05-29 16:48:46

Co-authors: T. C. Simonen, Y. Wu, H. Du

Contact Info:
LLNL, retired
678 Hayes Ave.
Livermore, CA   94550
USA

Abstract Text:
Fusion power plants will require materials that can withstand a few MW/m2 of bombardment by 14 MeV D-T neutrons. The Gas Dynamic Trap (GDT) neutron source concept would test and qualify suitable materials and sub-components. Here we model ways to further increase the attractiveness of the neutron source suggested by the GDT team [1] and we benchmark our models with new experiments on the GDT. First is 400 kW ECH power to double the electron temperature to 0.4 keV [2] thereby reducing the neutral beam injection power required to heat and sustain the warm plasma. Second is an additional coil on each end to reduce the power and particle end leakage [3]. Both ideas increase the electron temperature and thereby increase the neutron output relative to the neutral beam power. In addition, these ideas also reduce the gas throughput and thereby reduce the size of the tritium reprocessing system and reduce the number of neutral beam injectors subjected to neutron exposure. In addition to neutron source applications, the GDT can provide high-power-density plasma flows for plasma-boundary studies; and if axisymmetric configurations can be MHD stabilized by techniques requiring little or no outflow of plasma, they could be applied as fusion cores for fusion-fission or even pure fusion power.
1. U. Fisher, A. Moeslang and A.A. Ivanov, Fusion Engr. & Design, 48, 307 (2000).
2. P.A. Bagryansky, el. al., Nuclear Fusion 54, 082001 (2014).
3. A.A. Ivanov and V.V. Prikhodko, Plasma Phy. Control Fusion 55, 063001 (2013).

Characterization: 4.0

Comments:
Please group with any papers from the Budker Institute of Nuclear Physics (BINP), Novosibirsk, Russia.

Workshop on Exploratory Topics in Plasma and Fusion Research (EPR) and US-Japan Compact Torus (CT) Workshop
August 5-8, 2014
Madison, Wisconsin

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