Error field considerations for BPX [Book Chapter]
Conference
·
· [Proceedings] The 14th IEEE/NPSS Symposium Fusion Engineering
- General Atomics, San Diego, CA (United States)
Irregularities in the position of poloidal and/or toroidal field coils in tokamaks produce resonant toroidal asymmetries in the vacuum magnetic fields. Otherwise stable tokamak discharges become non-linearly unstable to disruptive locked modes when subjected to low level error fields. Because of the field errors, magnetic islands are produced which would not otherwise occur in tearing mode stable configurations; a concomitant reduction of the total confinement can result. Poloidal and toroidal asymmetries arise in the heat flux to the divertor target. The field errors from perturbed BPX coils are used in a field line tracing code of the BPX equilibrium to study these deleterious effects. Limits on coil irregularities for device design and fabrication are computed along with possible correcting coils for reducing such field errors.
- Research Organization:
- General Atomics, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC03-89ER51114
- OSTI ID:
- 10115357
- Report Number(s):
- GA-A--20579; CONF-910968--64; ON: DE92005394
- Resource Type:
- Conference paper/presentation
- Conference Information:
- Journal Name: [Proceedings] The 14th IEEE/NPSS Symposium Fusion Engineering
- Country of Publication:
- United States
- Language:
- English
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Error field considerations for BPX
Limits on m = 2, n = 1 error field induced locked mode instability in TPX with typical sources of poloidal field coil error field and a prototype correction coil, ``C-coil``
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Technical Report
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Mon Nov 30 23:00:00 EST 1992
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Limits on m = 2, n = 1 error field induced locked mode instability in TPX with typical sources of poloidal field coil error field and a prototype correction coil, C-coil''
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Mon Nov 30 23:00:00 EST 1992
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OSTI ID:6274164