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Tokamak disruption (FTU)

Tokamak disruption (FTU). Fusion neutrons. Fus. Neutr. +  ( >100keV). Photoneutrons. High voltage. Thermal quench. Current quench. Gamma-ray increase during reconnection. Acceleration or just expulsion of pre-existing fast electrons?. Fusion neutrons. Fus. Neutr. +  ( >100keV).

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Tokamak disruption (FTU)

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  1. Tokamak disruption (FTU) Fusion neutrons Fus. Neutr. +  (>100keV) Photoneutrons High voltage Thermal quench Current quench

  2. Gamma-ray increase during reconnection • Acceleration or just expulsion of pre-existing fast electrons? Fusion neutrons Fus. Neutr. +  (>100keV) Island growth: Reconnection signature

  3. Electric field during reconnection • Reconnected flux  w2 B s • Loop voltageV  B s w2 / t w  5E-2 t  5E-3 B  5; s  1 V  2.5 • Not large! • Locally large near x-point?

  4. Case with no pre-existing fast electrons? • Resistive plasma, still uncertain mechanism.

  5. Case with no pre-existing fast electrons? • Gamma-ray burst at mode fragmentation (plasmoids?)

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