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[PDF] Top 20 Disruptions, halo currents, and killer pellets in Alcator C-Mod

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Disruptions, halo currents, and killer pellets in Alcator C-Mod

Disruptions, halo currents, and killer pellets in Alcator C-Mod

... Most of the results presented in this paper have been obtained using an extensive set of Rogowski current sensors specifically designed for measuring halo currents. Two Ro[r] ... Voir le document complet

6

Disruptions and halo currents in Alcator C-Mod

Disruptions and halo currents in Alcator C-Mod

... Figure 2 shows the temporal behavior of the total poloidal halo current at the top and bottom of the inboard wall of the vacuum vessel during a typical disrupti[r] ... Voir le document complet

30

The Alcator C-Mod Divertor Bypass

The Alcator C-Mod Divertor Bypass

... plasma disruptions the changing poloidal field can induce a voltage up to100 V across the coil, potentially causing ...All currents and voltages are recorded and stored with standard ...is ... Voir le document complet

17

Alcator C-Mod Ion Cyclotron Antenna Performance

Alcator C-Mod Ion Cyclotron Antenna Performance

... tools and capabilities that enable unique ICRF compatibility ...ITER and reactor situations where tungsten is ...effective, and characterize its ...antennas. In this paper, we will report ... Voir le document complet

9

Double transport barrier experiments on Alcator C-Mod

Double transport barrier experiments on Alcator C-Mod

... source in the plasma core and continues to peak until the increased core impurity radiation arrests the improved energy confinement, ultimately leading to a barrier ...applied and modeling shows that ... Voir le document complet

22

Edge dimensionless identity experiment on DIII-D and Alcator C-Mod

Edge dimensionless identity experiment on DIII-D and Alcator C-Mod

... similar in the steep gradient region of the H-mode transport ...flux and the ion source resulting from neutrals penetrating into the plasma across the separatrix can not be used to fully describe the ... Voir le document complet

20

Confinement of ohmic and ICRF heated plasmas in Alcator C-Mod

Confinement of ohmic and ICRF heated plasmas in Alcator C-Mod

... (indirect) ion heating. The electron and ion temperatures are strongly modulated by sawteeth activity. The sawteeth them- selves are modified, their period increasing by fa[r] ... Voir le document complet

9

Alcator C-MOD final safety analysis report

Alcator C-MOD final safety analysis report

... The Alcator C-Mod Quality Assurance Program is designed to apply the standards of ANSI/ASME NQA-1-1983, Chapter II (Quality Assurance Basic Requirements) to any proje[r] ... Voir le document complet

101

Beta Limiting MHD Activity and Mode Locking in Alcator C-Mod

Beta Limiting MHD Activity and Mode Locking in Alcator C-Mod

... kHz and have a radial spacing of about 2 ...uncertainty in the argon ion rotation frequency depends on the argon signal level but is typically ~ 2 ... Voir le document complet

14

Comparison of detached and radiative divertor operation in Alcator C-Mod

Comparison of detached and radiative divertor operation in Alcator C-Mod

... analysis of both ohmic and ICRF-heated discharges has demonstrated some of the relative merits of detached divertor operation versus high-recycling divertor operation.[r] ... Voir le document complet

31

Alcator C-Mod: research in support of ITER and steps beyond

Alcator C-Mod: research in support of ITER and steps beyond

... lower and higher magnetic fields. The window for entering and remaining in I-mode (between L- and H-mode) clearly widens at high field, important for consideration of extrapolation to ITER ... Voir le document complet

45

Active and Fast Particle Driven Alfven Eigenmodes in Alcator C-Mod

Active and Fast Particle Driven Alfven Eigenmodes in Alcator C-Mod

... Core and edge Alfvén cascade measurements In addition to the magnetic pick-up coils on the outboard limiters that measure the more radially extended low n Alfvén eigenmodes, the PCI diagnostic measures the ... Voir le document complet

29

Active and fast particle driven Alfvén eigenmodes in Alcator C-Mod

Active and fast particle driven Alfvén eigenmodes in Alcator C-Mod

... eigenmodes and measure their damping rates at ITER toroidal fields and densities with equilibrated ion and electron ...above and below the outboard ...plasma and the resulting AE ... Voir le document complet

32

Core internal transport barriers on Alcator C-Mod

Core internal transport barriers on Alcator C-Mod

... spontaneously in Ohmic H-mode operation (Fig. 1.d) and that the ITB which is formed at the H- to L-mode transition under these conditions can be quite long lived as ...doubles, and the density ... Voir le document complet

27

Control of Internal Transport Barriers on Alcator C-Mod

Control of Internal Transport Barriers on Alcator C-Mod

... H-mode in an Ohmic plasma and then increasing amounts of ICRF power were added over a series of ...rise in the central density, with higher powers clamping the central density at progressively lower ... Voir le document complet

29

Chaotic edge density fluctuations in the Alcator C-Mod tokamak

Chaotic edge density fluctuations in the Alcator C-Mod tokamak

... introduced in Section III to address the question of whether the turbulent fluctuations in the Alcator C-Mod tokamak are generated by chaotic or stochastic ...reflectometry and the GPI. ... Voir le document complet

28

Density Limit and Cross-Field Edge Transport Scaling in Alcator C-Mod

Density Limit and Cross-Field Edge Transport Scaling in Alcator C-Mod

... experiments in Alcator C-Mod have uncovered a direct link between the character and scaling of cross-field particle transport in the edge plasma and the density limit, n G ... Voir le document complet

9

Current Profile Measurements Using MSE on Alcator C-Mod

Current Profile Measurements Using MSE on Alcator C-Mod

... advice and guides; Sam Pierson as an ‘in-vessel’ friend; Maria Silveira for countless nights of ‘baby sitting’; Josh Stillerman, Tom Fredian, Henry Bergler, Brandon Savage and Don Nelson for their ... Voir le document complet

326

C-MOD REVIEW: Spontaneous Toroidal Rotation in Alcator C-Mod Plasmas with No Momentum Input

C-MOD REVIEW: Spontaneous Toroidal Rotation in Alcator C-Mod Plasmas with No Momentum Input

... T and P denote toroidal and poloidal, e is the electric charge, B is the magnetic field, T and n are the temperature and density, K 1 and K 2 are functions of the viscosity matrix ... Voir le document complet

52

Data acquisition system for Alcator C-Mod

Data acquisition system for Alcator C-Mod

... Each evening after the machine operation is complete, the pulse files created that day are copied to both a magnetic disk staging area and an optical archive area[r] ... Voir le document complet

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