Introduction and synopsis of the TITAN reversed-field-pinch fusion-reactor study

Najmabadi, F.; Conn, R.W.; Krakowski, R.A.; Schultz, Kenneth R.; Steiner, D.; Bartlit, J.R.; Bathke, C.G.; Blanchard, James P.; Cheng, E.T.; Chu, Yuh-Yi; Cooke, P.I.H.; Creedon, R.L.; Duggan, William; Gierszewski, P.; Ghoniem, Nasr M.; Grotz, S.P.; Hasan, M.Z.; Hoot, C.G.; Kelleher, William P.; Kessel, C.; Kevton, Otto K.; Martin, R.C.; Miller, R.L.; Prinja, Anil K.; Orient, George O.; Sharafat, S.; Vold, Erik; Werley, K.A.; Wong, C.P.C.; Sze, D.K.

doi:10.1016/0920-3796(93)90124-z

Cited by 16 publications

(4 citation statements)

References 19 publications

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“…Several fusion power plant studies based on the RFP configuration were undertaken in the 1980s with a goal to identify compact, high-power-density options as the basis for fusion reactors with mass power density competitive with fission reactors [636,637]. The TITAN reactor concept [638][639][640][641] was the most detailed of these studies for the RFP. More recently, based on the results of recent experiments and on the expected advancements by RFX-mod2, new studies on the RFP as a neutron source for a fusion-fission hybrid reactor have been undertaken [376,642].…”

Section: Rfp Reactor Studiesmentioning

confidence: 99%

“…The large I w = 18 MW m −2 operating point was selected, in part, to bolster the concept of single-piece maintenance for a high plant availability of 85%. Single-piece maintenance was considered possible for a neutron wall load I w > 10 MW m −2 [639].…”

Section: The Titan System Studymentioning

confidence: 99%

“…There are two design versions with differing structural materials, TITAN-I with vanadium alloy and TITAN-II with ferritic steel, each with separate cooling methods. Adapted from [639], Copyright 1993, with permission from Elsevier.…”

Section: The Titan System Studymentioning

confidence: 99%

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The reversed field pinch

et al. 2021

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This paper reviews the research on the reversed field pinch (RFP) in the last three decades. Substantial experimental and theoretical progress and transformational changes have been achieved since the last review (Bodin 1990 Nucl. Fusion 30 1717–37). The experiments have been performed in devices with different sizes and capabilities. The largest are RFX-mod in Padova (Italy) and MST in Madison (USA). The experimental community includes also EXTRAP-T2R in Sweden, RELAX in Japan and KTX in China. Impressive improvements in the performance are the result of exploration of two lines: the high current operation (up to 2 MA) with the spontaneous occurrence of helical equilibria with good magnetic flux surfaces and the active control of the current profile. A crucial ingredient for the advancements obtained in the experiments has been the development of state-of-art active feedback control systems allowing the control of MHD instabilities in presence of a thin shell. The balance between achievements and still open issues leads us to the conclusion that the RFP can be a valuable and diverse contributor in the quest for fusion electricity.

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Section: Rfp Reactor Studiesmentioning

confidence: 99%

Section: The Titan System Studymentioning

confidence: 99%

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The reversed field pinch

et al. 2021

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“…This process was first tested experimentally in ZT-40M [28] and later in MST, where both a 10% plasma current increase [29] and a small confinement improvement [30] were observed due to the addition of OFCD to the background induction. Conceptually, OFCD has been envisioned as the most viable sustainment option for both steady-state [31] and hybrid inductive, pulsedburn [32,33] RFP reactor scenarios. Thus, as the application of OPCD bears on energy confinement and plasma sustainment, two fundamental aspects of RFP performance, studying OPCD may be helpful in advancing the RFP configuration.…”

Section: Introductionmentioning

confidence: 99%

Effects of oscillating poloidal current drive on magnetic relaxation in the Madison Symmetric Torus reversed-field pinch

McCollam

Nishizawa

et al. 2019

Plasma Phys. Control. Fusion

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Magnetic relaxation behavior in reversed-field pinch (RFP) experiments on the Madison Symmetric Torus device is modified by oscillating poloidal current drive (OPCD). We observe that OPCD modulates the nonlinear magnetic fluctuation dynamics of the RFP as it modulates the equilibrium and its linear stability properties. In particular, OPCD can entrain the RFP's nonlinear magnetic relaxation cycle and can therefore modify the frequency of the discrete relaxation events called sawtooth crashes. These crashes, which are intermittent or quasiperiodic in standard RFP plasmas without oscillating voltages, can be entrained by OPCD to become nearly periodic. The entrainment of the RFP sawtooth cycle is investigated by varying OPCD amplitude and frequency, as well as plasma equilibrium magnetic field reversal. Impurity ion (C +4 ) heating induced and modulated by OPCD is measured by ion Doppler spectrometry and is ascribed to the modulation of magnetic reconnection activity.

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