Toroidal solenoids with a space magnetic and a plane-geometry axis

Georgievskij, A.V.; Ziser, V.E.; Nemov, V. V.; Peletminskaya, V.G.; Pogozhev, D.P.; Sergeev, Yu.F.; Skoblik, M.N.; Shishkin, A.A.

doi:10.1088/0029-5515/14/1/012

Cited by 9 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the first work of this kind [10] planar coils were tilted both around the vertical and around the "non-trivial" horizontal axis (the trivial axis being the axis of symmetry of the circular coil). The locus of the coil-centers was a circle.…”

Section: Brief Review Of Tilted Coil Devicesmentioning

confidence: 99%

Large vacuum flux surfaces generated by tilted planar coils

Austin

Hammond

et al. 2019

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

Helical equilibria can be generated by arrangements of planar coils similar to tokamaks, but without a central solenoid and with the toroidal field (TF) coils tilted with respect to the vertical. This is known from earlier numerical works, e.g. P.E. Moroz, Phys. Plasmas 2, 4269 (1995). However, such concept tends to need large coils (of low aspect ratio) but form small plasmas (of large aspect ratio). Here it is numerically shown that larger, more attractive vacuum flux surfaces -relative to the size of the device-can be generated by carefully optimizing the inclination of the TF coils and currents in the various coil-sets. Vacuum configurations of aspect ratios as low as 4 are found for 6 tilted TF circular coils. Higher numbers of TF coils have advantages (smaller effective ripple) and disadvantages (lower rotational transform, smaller plasma). Finally, the aspect-ratio A of the vacuum flux surfaces is quantified as a function of the ratio A c of the coil-radius to the radial location of the coil-center. It is found that, in order to minimize A, it is beneficial to interlink or marginally interlink the TF coils (A c 1).

show abstract

Section: Brief Review Of Tilted Coil Devicesmentioning

confidence: 99%

Large vacuum flux surfaces generated by tilted planar coils

Austin

Hammond

et al. 2019

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

show abstract

“…2 with respect to the (F) axis and simultaneously changing the sign of a. This conversion is easily understood from Eqs (11) to (13).…”

Section: Lettersmentioning

confidence: 99%

“…On the other hand, high-beta systems were not examined experimentally, except for Syllac [14],Isar [15], and Asperator-K [16]. Systems with non-planar magnetic axes are mainly divided into two types, one with helically symmetric axis [11][12][13][14][15][16] and the other one with an axis having inflection points [17][18][19]. The former system can simply be treated as two-dimensional, because of its helical symmetry.…”

mentioning

confidence: 99%

Equilibrium configurations of reverse field pinch plasma with a helical magnetic axis

et al. 1984

View full text Add to dashboard Cite

A reverse field pinch (RFP) equilibrium configuration with helical magnetic axis is studied numerically over a wide range. The Grad-Shafranov equation is solved under the condition that the current flows along the magnetic field and the ratio of current to magnetic field is constant on every magnetic surface. Nested magnetic surfaces in the RFP are realized in this system; they are similar to those in a simple toroidal system. According to the direction of the helical winding, quite different RFP configurations are realized, depending on whether the current is parallel or antiparallel to the magnetic field. In the antiparallel case, the total plasma current is smaller than in the axisymmetric case although the ratio of current density to magnetic field is the same in both cases.

show abstract

“…Historically the use of planar coils for the production of stellarator effects has been considered in a number of publications [10][11][12][13][14][15]. A more recent and detailed analysis of this type of configuration has been given in [16].…”

Section: Introductionmentioning

confidence: 99%

Low-aspect-ratio stellarators with planar coils

Moroz¹

1997

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

Abstract. The possibility of using simple sets of planar coils to produce low-aspect-ratio stellarator (LARS) configurations is analysed. Various types of LARS with different planar coils of potential interest to fusion research are identified. It is found that these configurations possess rather attractive features including: compact design and coil simplicity; good access to the plasma; closed vacuum flux surfaces with large enclosed volume; a significant external rotational transform; strong magnetic well; and a natural divertor. Finite plasma-pressure and finite plasma-current effects are studied as well, and it is shown that the LARS configurations considered benefit from the plasma current.

show abstract

Toroidal solenoids with a space magnetic and a plane-geometry axis

Cited by 9 publications

References 6 publications

Large vacuum flux surfaces generated by tilted planar coils

Large vacuum flux surfaces generated by tilted planar coils

Equilibrium configurations of reverse field pinch plasma with a helical magnetic axis

Low-aspect-ratio stellarators with planar coils

Contact Info

Product

Resources

About