Direct Measurement of Electron Cyclotron Emission during High Guide Field Magnetic Reconnection

Inomoto, Michiaki; Kondo, Kyohei; Kawamori, Eiichirou; Igami, H.

doi:10.7566/jpsj.91.094501

Cited by 1 publication

(1 citation statement)

References 22 publications

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“…Although the E t profile shown in figure 8(a) is similar to that for the open electrode condition shown in figure 6(a), in-plane electrostatic field E z was largely suppressed in the inboardside downstream region (R < 0.25 m) as shown in figure 8(b), in which the radial locations of the magnetic field lines connected to electrode pairs A-D were superimposed by white This suppression of |E z | in the inboard-side downstream region certainly changed the parallel electric field, but its effect was restrictive. As shown in figure 8(c), E // in the inboard-side down stream region was reduced in comparison to the case with open electrodes but its sign is still reversed except for the very inboard area of R < 0.2 m, where intense SXR [21] and ECE [23] emission were observed when the inboard limiter was equipped with the UTST device.…”

Section: Effect Of Short-time Connected Electrodesmentioning

confidence: 85%

The role of an in-plane electric field during the merging formation of spherical tokamak plasmas

Inomoto,

Suzuki,

Jin

et al. 2024

Nucl. Fusion

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Axial merging of two torus plasmas is utilized as a centre-solenoid free start-up scheme of a high-beta spherical tokamak plasma, in which magnetic reconnection under a strong guide field plays dominant roles on energy conversion and equilibrium formation. Ion heating source in magnetic reconnection is the plasma outflow with E×B drift velocity in the downstream region where the reconnected field lines flow out. Since the inductive reconnection electric field is almost parallel to the magnetic field particularly in the inboard-side downstream region of magnetic reconnection under a strong guide field, large electrostatic field in the poloidal plane is spontaneously formed to sustain steady plasma outflow motion in the downstream region. In the spherical tokamak plasma merging experiment, self-generated electrostatic field in the downstream region does not always balance with the inductive electric field to make the total electric field strictly perpendicular to the total magnetic field. Excess of the electrostatic field will provide even faster outflow plasma velocity than the magnetic field line motion and quick reversal of toroidal plasma current to form convex flux surfaces.

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Section: Effect Of Short-time Connected Electrodesmentioning

confidence: 85%