Vivian T. Y. Tang

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  • ALCATOR C-MOD, N. P. BASSE, +20 authors K. ZHUROVICH
  • 2006
An overview of the diagnostics installed on the Alcator C-Mod tokamak [I.] is presented. Approximately twenty-five diagnostic systems are being operated on C-Mod. The compact design of the machine and the cryostat enclosing the vacuum vessel and magnetic field coils make access challenging. Diagnostics are used to study four focus areas: Transport, plasma(More)
This paper reviews the physics and technology of wave-particle interaction experiments in the ion cyclotron range of frequencies (ICRF) and the lower hybrid range of frequencies (LHRF) on the Alcator C-Mod tokamak. Operation of fixed frequency (80 MHz) and tunable (40 – 80 MHz) ICRF transmitters and the associated transmission system is described. Key(More)
Alfvén eigenmodes (AEs) are studied to assess their stability in high density reactor relevant regimes where T i ≈ T e and as a diagnostic tool. Stable AEs are excited with active MHD antennas in the range of the expected AE frequency. Toroidal Alfvén eigenmode (TAE) damping rates between 0.5% < γ/ω < 4.5% have been observed in diverted and limited Ohmic(More)
The Earth's core is mostly an Fe-Ni alloy with a fraction of light elements (~10 wt%, mainly O, S and Si). Accumulation of these light elements under the core-mantle boundary (CMB) may lead to chemical stratification. Seismic observations have been presented both for and against the stratification in the topmost region of the outer core. Here we investigate(More)
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