THE REVERSED FIELD PINCH A Proposal for RFP Research in the U.S
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Influence of energetic ions on tearing modes in a reversed field pinch
Tearing mode stability analysis in the presence of circulating energetic ions (CEI) is studied in the reversed field pinch (RFP) magnetic configuration. In contrast to the minimal effect of precessional drift of CEI on tearing modes in tokamaks, the effect of precessional drift of CEI on tearing modes is important in the RFP. It is found that the effects of CEI on tearing modes in RFP depend on...
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Reversed field pinch (RFP) discharges have been produced in a large (1.39 metre major radius, 0.56 metre average minor radius), thick walled (5 cm), aluminium vacuum vessel with indented sides. The discharges are self-reversed and ramped up to a current of 300 kA over a time of 10 ms. Reversal is sustained for £ 10 resistive diffusion times, despite the presence of large magnetic fluctuations. ...
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A generalized analytic representation for the magnetic field and current density profiles in a reversed-field pinch (RFP) is proposed. These profiles have zero current density at the wall and finite plasma pressure. The profiles are characterized by two free parameters here taken to be the field-reversal parameter (F> and pinch parameter (0). From the profiles, many useful quantities such as ma...
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Quenching of the reversed-field pinch (RFP) dynamo is observed in numerical simulations using current profile control. A novel algorithm employing active feedback of the dynamo field has been utilized. The quasi-steady state achieved represents an important improvement as compared with earlier numerical work and may indicate a direction for the design of future experiments. Both earlier and the...
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