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Abstract

Energetic, 14.6 MeV protons from the 3-He - D fusion reaction have been observed with a silicon detector installed inside the JET vacuum vessel. The detector views the plasma through a 20 mum thick stainless steel window and its collimation is such that only protons with v about equal v-perpendicular at the detector location are recorded. Under differing plasma parameters prompt and delayed losses have been observed. Protons produced by the 0.82 MeV 3-He - D - D fusion products slowing down in plasmas with no initial 3-He component can be clearly distinguished from protons originating from thermal 3-He - D reactions in plasmas with an added 3-He component by their measured energy spectra. In RF 3-He minority heated plasmas, intense bursts of protons are detected in coincidence with the temperature collapse of giant sawtooth internal disruptions.

Additional information

Authors: SADLER G, JET JOINT UNDERTAKING, ABINGDON (UK);JARVIS O N, JET JOINT UNDERTAKING, ABINGDON (UK);VAN BELLE P, JET JOINT UNDERTAKING, ABINGDON (UK);GOWMAN J, JET JOINT UNDERTAKING, ABINGDON (UK);HONE M, JET JOINT UNDERTAKING, ABINGDON (UK);KAELLNE J, JET JOINT UNDERTAKING, ABINGDON (UK);MERLO V JET JOINT UNDERTAKING, ABINGDON (UK), JET JOINT UNDERTAKING, ABINGDON (UK)
Bibliographic Reference: 27TH ANNUAL MEETING OF THE DIVISION OF PLASMA PHYSICS, SAN DIEGO (USA), NOV. 4-8, 1985 PAPER 8F4, PROCEEDINGS P. 1585
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