Analysis of the impacts of the J-TEXT TBM mock-up on the equilibrium magnetic field

Zhang, Zhengqing; Ren, Bo; Zhang, Ming; Zhang, Jun; Liu, Sumei

doi:10.1016/j.fusengdes.2016.02.057

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…It is easy to see the ripple effect. The simulation has been demonstrated corresponding with the real value [17,18].…”

Section: Correction Of Magnetic Field Distributionmentioning

confidence: 99%

Development of Q-band X-mode microwave reflectometry for the measurement of edge density profile

Yang¹,

Cai²,

(周若冰)³

et al. 2018

J. Inst.

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A: A Q-band X-mode homodyne microwave reflectometry has been developed for the measurement of edge electron density profile on the Joint TEXT tokamak (J-TEXT). A voltage controlled oscillator (VCO) with a frequency quadrupler is used as the microwave source. An arbitrary waveform generator (AWG) is adopted to control the sweeping period (20 µs) for the VCO. Homodyne method is chose to simplify the structure of the hardware circuit. In addition, a single antenna scheme which using a directional coupler to realize the sharing of an antenna for transmitting and receiving to save the resources of diagnostic windows has been adopted. For the data processing, the Hilbert transform has been used to demodulate the signal instead of the I/Q phase detector. This reflectometry has been installed on J-TEXT and effectively measured edge density profile. K: Plasma diagnostics -interferometry, spectroscopy and imaging; Nuclear instruments and methods for hot plasma diagnostics 1Corresponding author.

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“…It is easy to see the ripple effect. The simulation has been demonstrated corresponding with the real value [17,18].…”

Section: Correction Of Magnetic Field Distributionmentioning

confidence: 99%

Development of Q-band X-mode microwave reflectometry for the measurement of edge density profile

Yang¹,

Cai²,

(周若冰)³

et al. 2018

J. Inst.

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“…The ITER device is planned to have ferromagnetic test blanket modules (TBMs) installed in three locations within a 90 • toroidal extent, introducing a substantial n = 1 asymmetry in the distribution of ferromagnetic material [26]. A study performed on DIII-D using a set of coils to simulate the resulting static error field demonstrated plasma rotation braking [27,28], and the effect of the TBMs on equilibrium fields and plasma parameters remains a subject of interest [29]. In addition to the dissipative stabilization from plasma rotation, mode rotation relative to the lab frame has a significant bearing on the stabilizing or destabilizing character of the ferromagnetic wall, as discussed in the previous section.…”

Section: Toroidal Wall Asymmetrymentioning

confidence: 99%

Dynamics of MHD instabilities near a ferromagnetic wall

Hughes¹,

Levesque²,

Navratil³

2018

Nucl. Fusion

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Prospective fusion component testing and DEMO power reactor concepts are expected to employ low-activation ferritic steels because of their ability to withstand the high neutron flux of the reactor environment. However, theory suggests that ferromagnetic material may amplify certain external MHD instabilities. Using its ferromagnetic-resistive wall mode (FRWM) upgrade, the High Beta Tokamak-Extended Pulse (HBT-EP) experiment has observed approximately doubled growth rates when operating with a close-fitting ferromagnetic first wall, compared to operation with a stainless steel first wall. The presence of a ferromagnetic wall correlates with earlier disruptions, and FRWM growth rates increase with decreasing mode rotation, as expected due to the increased skin depth allowing greater mode interaction with the bulk ferromagnetic material. It is also seen that introducing low-n asymmetries into the toroidal distribution of ferromagnetic material, similar to the ITER test blanket module toroidal asymmetry, changes the phase preference of rotating modes; meanwhile, a similar change in purely conducting material does not significantly change the mode’s phase preference.

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Measurement of the impacts of the J-TEXT TBM mock-up on the toroidal and vertical magnetic field

Zhang

Ren

Zhang

et al. 2018

Fusion Engineering and Design

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Analysis of the impacts of the J-TEXT TBM mock-up on the equilibrium magnetic field

Cited by 3 publications

References 12 publications

Development of Q-band X-mode microwave reflectometry for the measurement of edge density profile

Development of Q-band X-mode microwave reflectometry for the measurement of edge density profile

Dynamics of MHD instabilities near a ferromagnetic wall

Measurement of the impacts of the J-TEXT TBM mock-up on the toroidal and vertical magnetic field

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