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Li collection experiments on T-11M and T-10 in framework of Li closed loop concept

The 2nd International Symposium on Lithium Applications for Fusion Devices April 27-29, 2011 Princeton Plasma Physics Laboratory Princeton, NJ, USA. Li collection experiments on T-11M and T-10 in framework of Li closed loop concept

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Li collection experiments on T-11M and T-10 in framework of Li closed loop concept

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  1. The 2nd International Symposium on Lithium Applications for Fusion Devices April 27-29, 2011Princeton Plasma Physics LaboratoryPrinceton, NJ, USA Li collection experiments on T-11M and T-10 in framework of Li closed loop concept S.V.Mirnov1, A.G.Alekseev1, A.M.Belov1, N.T.Djigailo1, A.N.Kostina2, V.B.Lazarev1, I.E.Lyublinski3, V.M.Nesterenko1, A.V.Vertkov3, V.A.Vershkov4. 1 GSC PF TRINITI 142 190 Troitsk Mosc. Reg. Russia. 2 NRNU MEPhI, Kashirskoye sh., 31,Moscow, 115409 Russia 3 FSUE “Red Star”, Elektrolitnyj pr. 1A, Moscow, 113 230 Russia 4 RSC “Kurchatov Institute” Kurchatov Acad. Sc. 1 Moscow 123 192 Russia

  2. The concept of a steady state tokamak with plasma facing components (PFC) on the basis of the closed loop of liquid lithium circulation demands the technological decision of three tasks: lithium injection to the plasma, lithium ions collection before their deposition on the vacuum vessel and Li returning from collector to the injection zone. Main subject of paper is the investigations of Li collection by different types limiters, intersected the scrape-of-layer (SOL) of T-10 and T-11M tokamaks. For practical solution of this problem in Т-11М and Т-10 tokamak experiments have been applied Li-, C-rail limiters and special ring SS R-limiter-collector (T-11M). The quantitative analysis of the sample-witnesses located on Т-11М limiters showed, that nearby 60±20% of the lithium injected during plasma operating of Т-11М had been collected by limiters. It confirms a potential opportunity of collection of the main part of the injected lithium by the limiters-collectors located in the SOL area of steady state tokamak.

  3. T-11M and T-10 tokamaks

  4. T-11M: R/a=0.7/0.25m, Jp=50-100kA, BT =1.2T, Δt=0.2sT-10: R/a=1.5/0.35m, Jp=200-300kA, BT=2.5T, Δt=1s

  5. T-10 experiment

  6. T-10 lithiation

  7. Li closed loop concept

  8. Dust explosion in LHD (1641sec)

  9. Li CPS emitterT-11M experiment

  10. Scheme of new “W-Li limiter” of T-11M with water cooling/heating in steady state regime TOKAMAK PLASMA Water cooling 200oC Li tank W - felt

  11. W Li limiter test on Т-11М29.03.2011 12:44:41Video registration Parameters of video registration: 640×480 points Frequency -250Hz, exposition 4ms in light LiI (670,8 nm);

  12. ne~1-2 1019m-3 Jp=50kA t~160ms

  13. Li limiter in T-11M chamber Field of view

  14. Li collection by lateral sides of W-Li CPS limiter

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