ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
A novel nonperturbative diagnostic is used to infer the existence of trapped magnetic fields in a θ-pinch plasma. A thin beam of 1.5-MeV electrons from a 9-GHz, X-band linear accelerator is injected along the axis of a θ pinch with a period of 6 μs. The electron pulse duration is approximately 1 μs. Without any fill gas, when the θ pinch is fired, only those electrons within ±50 ns of the second Bext =0 are transmitted. The rest of the electrons are deflected by the solenoidal field, which acts as a strong lens. When the plasma is present even these transmitted electrons at Bext=0 are deflected because the plasma can trap some of the field lines. The magnitude and the scale length of these trapped fields can be estimated from the extent of the deflection.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1140171
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