Details

Autor(en) / Beteiligte

• Zakharov, Leonid E.
• Allain, Jean Paul
• Bennett, Samuel X.
• Abdelghany, Muhammad A. E.
• Bulgadaryan, Daniel G.

Titel

Low Recycling Divertor for JET Burning Plasma Regime ( P} > 25 MW, Q} > 5), Insensitive to Plasma Physics

Ist Teil von

• IEEE transactions on plasma science, 2020-06, Vol.48 (6), p.1849-1856

Ort / Verlag

United States: IEEE

Erscheinungsjahr

2020

Link zum Volltext

• Volltext

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• Lasting for already six decades, the current high recycling approach to tokamak fusion is still unable to demonstrate the fusion gain factor <inline-formula> <tex-math notation="LaTeX">Q_{\text {DT}}=1 </tex-math></inline-formula>, which is the minimal milestone on the path to fusion energy. Clearly, an alternative approach is needed. Recently, such an approach was proposed as the low recycling regime with plasma pumping by continuously flowing liquid lithium (24/7-FLiLi) and physics of a burning plasma was described in application to the JET tokamak. This article complements the plasma physics by consideration of feasibility and specifics of the low recycling divertor (LRD). Its significant difference from existing high recycling divertors is in the absence of a sheath potential on the open field lines, resulting in small angle impingement to the target surfaces by high energy plasma particles. For the first time, this article presents the design guidance for LRD suitable for JET-like tokamak. Being the only new element in the machine, the LRD with other existing JET facilities, e.g., neutral beam power (NBI) <inline-formula> <tex-math notation="LaTeX">P_{\textrm {NBI}} = 4 </tex-math></inline-formula> MW, <inline-formula> <tex-math notation="LaTeX">E_{\textrm {NBI}} = 120 </tex-math></inline-formula> keV, opens up the opportunity for demonstration of fusion power <inline-formula> <tex-math notation="LaTeX">P_{\text {DT}} > 20 </tex-math></inline-formula> MW, <inline-formula> <tex-math notation="LaTeX">Q_{\text {DT}} > 5 </tex-math></inline-formula> and of outstanding tritium burn up, exceeding 7%.