PFC / JA - 96 - 41 Disruptions , Halo Currents , and Killer Pellets in Alcator C - Mod
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PFC / JA - 95 - 25 Disruptions and Halo Currents in Alcator C - Mod
Disruptions in Alcator C-Mod can generate large eddy currents in the highly conducting vacuum vessel and internal structures, including a significant poloidal component due to halo currents. In order to better understand the stresses arising from the resulting J x B forces, Alcator C-Mod has been fitted with a comprehensive set of sensors to measure the spatial distribution and temporal behavio...
متن کاملPFC / JA - 96 - 23 Particle Drift Effects on the Alcator C - Mod Divertor
The sign of the toroidal magnetic field has a major effect on the divertor in Alcator C-Mod, determining whether the higher recycling is on the inboard or outboard side and leading to inboard/outboard temperature and density differences up to a factor of ten. A recently published paper [1] reported in detail on these observations, which are an indication of the importance of plasma particle dri...
متن کاملPFC / JA - 96 - 15 The High Resolution Video Capture System on the Alcator C - Mod Tokamak
A new system for routine digitization of video images is presently operating on the Alcator C-Mod tokamak. The PC-based system features high resolution video capture, storage, and retrieval. The captured images are stored temporarily on the PC, but are eventually written to CD. Video is captured from one of five filtered RS-170 CCD cameras at 30 frames per second (fps) with 640x480 pixel resolu...
متن کاملPFC / JA - 96 - 39 ICRF Heating Scenarios on Alcator C - Mod
Successful high power ICRF heating of L-mode and H-mode plasmas has been performed in the Alcator C-Mod tokamak with up to 3.5 MW of RF power at 80 MHz. Efficient absorption (90-100%) of the RF power was observed for D(H) heating at 5.3 T (here the minority ion species is indicated parenthetically). Lower single-pass absorption experiments were also performed in D(3He) at 7.9 T, D( 2 13He) at 4...
متن کاملPFC / JA - 96 - 25 X - ray Observations of Central Toroidal Rotation in Ohmic Alcator C - Mod Plasmas
Impurity toroidal rotation has been observed in the center of Alcator C-Mod ohmic plasmas from the Doppler shifts of argon and molybdenum x-ray lines. The rotation is highest (~ 6 x 106 cm/s) in the early portion of the discharges, when the loop voltage is highest and the electron density is lowest, and then typically settles to values < 2 x 106 cm/s during the steady state period. The impurity...
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تاریخ انتشار 2014