Target heat loading due to fast, transient heat pulses produced from a conical θ-pinch as a prototype for benchmarking simulations of transient heat loads

T. K. Gray, M. A. Jaworski, D. N. Ruzic

Research output: Contribution to journalArticle

Abstract

The ELM simulating plasma gun (ESP-gun) has been developed to study the effects of transient, blob-like plasmas on the plasma facing components of TOKAMAKs. ESP-gun utilizes a RF helicon plasma to pre-ionize a plasma column underneath a conical, θ-pinch coil, which is used to compress and eject plasmas. Measurements have been made of the existing RF plasma and the subsequent compressed plasma. A copper target was placed downstream of the θ-pinch, and its temperature rise was measured with respect to time. For modest argon plasmas, ne ∼ 1018 m-3 and Te ≤ 100 eV, the target temperature was observed to have an equivalent heat loading of up to 90 kJ/m2. Given that the plasma density and temperature are low, it is believed that the target heat loading will scale linearly with plasma density such that plasmas of 1020-1021 m-3 would reach target heat loading in excess of 1 MJ/m2. A zero dimensional thermal model will be presented to estimate the expected target heat loading.

Original languageEnglish (US)
Pages (from-to)1032-1036
Number of pages5
JournalJournal of Nuclear Materials
Volume363-365
Issue number1-3
DOIs
StatePublished - Jun 15 2007

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Keywords

  • Divertor
  • Divertor materials
  • Plasma facing components
  • Power loading

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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