Lack of dependence on resonant error field of locked mode island size in ohmic plasmas in DIII-D
Journal Article
·
· Nuclear Fusion
- General Atomics, San Diego, CA (United States)
DIII-D experiments show that fully penetrated resonant n=1 error field locked modes in Ohmic plasmas with safety factor q95≳3 grow to similar large disruptive size, independent of resonant error field correction. Relatively small resonant (m/n=2/1) static error fields are shielded in Ohmic plasmas by the natural rotation at the electron diamagnetic drift frequency. However, the drag from error fields can lower rotation such that a bifurcation results, from nearly complete shielding to full penetration, i.e., to a driven locked mode island that can induce disruption.
- Research Organization:
- General Atomics, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- FC02-04ER54698; AC05-06OR23100
- OSTI ID:
- 1345534
- Journal Information:
- Nuclear Fusion, Vol. 55, Issue 2; ISSN 0029-5515
- Publisher:
- IOP ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 4 works
Citation information provided by
Web of Science
Web of Science
Direct measurements of internal structures of born-locked modes and the key role in triggering tokamak disruptions
|
journal | April 2019 |
Similar Records
Error field detection in DIII-D by magnetic steering of locked modes
Measurements of the toroidal torque balance of error field penetration locked modes
Use of an m=2, n=1 static error field correction coil, {open_quotes}The C-coil,{close_quotes} on DIII-D to avoid disruptive locked modes
Journal Article
·
Thu Feb 20 00:00:00 EST 2014
· Nuclear Fusion
·
OSTI ID:1345534
+2 more
Measurements of the toroidal torque balance of error field penetration locked modes
Journal Article
·
Mon Jan 05 00:00:00 EST 2015
· Plasma Physics and Controlled Fusion
·
OSTI ID:1345534
+6 more
Use of an m=2, n=1 static error field correction coil, {open_quotes}The C-coil,{close_quotes} on DIII-D to avoid disruptive locked modes
Conference
·
Mon May 01 00:00:00 EDT 1995
·
OSTI ID:1345534