Dependence of Edge Stability on Plasma Shape and Local Pressure Gradients in the DIII-D and JT-60U Tokamaks
Conference
·
OSTI ID:930821
more »
- General Atomics
- Japan Atomic Energy Agency (JAEA)
- ORNL
- Princeton Plasma Physics Laboratory (PPPL)
- Lawrence Livermore National Laboratory (LLNL)
The dependence of edge stability on plasma shape and local pressure gradients, P, in the DIII-D and JT-60U tokamaks is studied. The stronger plasma shaping in DIII-D allows the edge region of DIII-D discharges with Type I ("giant") ELMs to have access to the second region of stability for ideal ballooning modes and larger edge P′than JT-60U Type I ELM discharges. These JT-60U discharges are near the ballooning mode first regime stability limit. DIII-D results support an ideal stability based working model of Type I ELMs as low to intermediate toroidal mode number, n, MHD modes. Results from stability analysis of JT-60U Type I ELM discharges indicate that predictions from this model are also consistent with JT-60U edge stability observations.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 930821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Analysis of ELM stability with extended MHD models in JET, JT-60U and future JT-60SA tokamak plasmas
Effects of plasma shape and profiles on edge stability in DIII-D
Magnetohydrodynamic Stability of Improved Confinement Plasmas in JT-60U
Journal Article
·
Mon Nov 06 19:00:00 EST 2017
· Plasma Physics and Controlled Fusion
·
OSTI ID:1822100
Effects of plasma shape and profiles on edge stability in DIII-D
Conference
·
Mon Nov 30 23:00:00 EST 1998
·
OSTI ID:296834
Magnetohydrodynamic Stability of Improved Confinement Plasmas in JT-60U
Journal Article
·
Sun Sep 15 00:00:00 EDT 2002
· Fusion Science and Technology
·
OSTI ID:20845853