Heavy lon Beam Probe Diagnostic of Static and Dynamic Potential Structure
نویسنده
چکیده
A heavy ion beam probe (HIBP) is a unique diagnostic method to measure the electric potential in magnetically confined high temperature plasmas. Its fine probing beam and well-collimated secondary beam detector give this diagnostic good spatial resolution, which together with the good time resolution make it powerful in probing plasma interior both in steady state and transient state. There are many excellent review papers [for example, 1,2], but these mostly concentrate on HIBP applications in tokamak research. The radial electric field or space potential structure is more important in stellarators or other non-axisymmetric tori, because particle fluxes are intrinsically non-ambipolar in these devices. This paper reports examples of HIBP measurements of potential structures in non-axisymmetric tori-the bumpy torus NBT-IM and the heliotron/torsatron CHS-following brief reviews of the development history and basic principles of the HIBP.
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