Published August 1990
| Version v1
Journal article
Present status of impurity transport study
Creators
- 1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
Description
Present status of impurity transport study in tokamaks is reviewed. Ohmically-heated and neutral-beam heated L-mode discharges exhibit anomalous impurity transport. The values of particle diffusivity range from 0.5 to 2 m2/s. With improved energy confinement such as in H-mode, impurity transport is suppressed, which results in a radiation collapse of H-mode state in the absence of edge-localized mode (ELM). With high power neutral beam heating, frequent ELMs expel particles and heat out of the separatrix surface, which results in long (∼5 seconds), quasi-stationary H-mode. (author) 73 refs
Additional details
Publishing Information
- Journal Title
- Kaku Yugo Kenkyu
- Journal Volume
- 64
- Journal Issue
- 2
- Series
- Kaku Yugo Kenkyu.
- Journal Page Range
- 144-166
- ISSN
- 0451-2375
- CODEN
- KAKEA
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 22032769
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- ATOM TRANSPORT; DIVERTORS; EDGE LOCALIZED MODES; H-MODE PLASMA CONFINEMENT; JOULE HEATING; NEUTRAL ATOM BEAM INJECTION; PLASMA HEATING; PLASMA IMPURITIES; TOKAMAK DEVICES
- Descriptors DEC
- BEAM INJECTION; CLOSED PLASMA DEVICES; CONFINEMENT; HEATING; IMPURITIES; INSTABILITY; NEUTRAL-PARTICLE TRANSPORT; PLASMA CONFINEMENT; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; RADIATION TRANSPORT; THERMONUCLEAR DEVICES