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Effects of nonclassical ion losses on radial electric field in CHS torsatron/heliotron

Technical Report:

Abstract

A selfconsistent analysis is discussed to determine the radial electric field and loss cone boundary in torsatron/heliotron plasmas under the influence of nonclassical ion losses. Effects of the loss cone loss, charge exchange loss of fast ions with neutrals, and the bipolar part of anomalous loss are taken into account. Analysis is applied to the NBI heated plasma in the CHS device. Comparison is made between theoretical results and experimental observations. The increased ion particle losses by the orbit loss and charge exchange loss with neutrals make the radial electric field more negative than the value of purely neoclassical calculation. The partition of the injection energy among the shine through, direct orbit loss , charge exchange loss and bulk heating is estimated by using the self-consistent electric field profile. The power loss of fast ions caused by the orbit loss or charge exchange process is by a factor of several tens to hundred greater than the reduction of the energy loss of bulk ions through the enhancement of radial electric field. Comparison with W7-A experiment is made, and the differences are discussed. (author).
Publication Date:
Jul 01, 1992
Product Type:
Technical Report
Report Number:
NIFS-160
Reference Number:
SCA: 700430; PA: JPN-92:012196; SN: 93000919898
Resource Relation:
Other Information: PBD: Jul 1992
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; STELLARATORS; H-MODE PLASMA CONFINEMENT; CHARGED-PARTICLE TRANSPORT; ROTATIONAL TRANSFORM; MAGNETIC CONFINEMENT; PARTICLE LOSSES; NEOCLASSICAL TRANSPORT THEORY; ELECTRIC FIELDS; ANALYTICAL SOLUTION; 700430; MAGNET COILS AND FIELDS
OSTI ID:
10112627
Research Organizations:
National Inst. for Fusion Science, Nagoya (Japan)
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE93754331; TRN: JP9212196
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
52 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Sanuki, Heiji, Itoh, Kimitaka, and Itoh, Sanae. Effects of nonclassical ion losses on radial electric field in CHS torsatron/heliotron. Japan: N. p., 1992. Web.
Sanuki, Heiji, Itoh, Kimitaka, & Itoh, Sanae. Effects of nonclassical ion losses on radial electric field in CHS torsatron/heliotron. Japan.
Sanuki, Heiji, Itoh, Kimitaka, and Itoh, Sanae. 1992. "Effects of nonclassical ion losses on radial electric field in CHS torsatron/heliotron." Japan.
@misc{etde_10112627,
title = {Effects of nonclassical ion losses on radial electric field in CHS torsatron/heliotron}
author = {Sanuki, Heiji, Itoh, Kimitaka, and Itoh, Sanae}
abstractNote = {A selfconsistent analysis is discussed to determine the radial electric field and loss cone boundary in torsatron/heliotron plasmas under the influence of nonclassical ion losses. Effects of the loss cone loss, charge exchange loss of fast ions with neutrals, and the bipolar part of anomalous loss are taken into account. Analysis is applied to the NBI heated plasma in the CHS device. Comparison is made between theoretical results and experimental observations. The increased ion particle losses by the orbit loss and charge exchange loss with neutrals make the radial electric field more negative than the value of purely neoclassical calculation. The partition of the injection energy among the shine through, direct orbit loss , charge exchange loss and bulk heating is estimated by using the self-consistent electric field profile. The power loss of fast ions caused by the orbit loss or charge exchange process is by a factor of several tens to hundred greater than the reduction of the energy loss of bulk ions through the enhancement of radial electric field. Comparison with W7-A experiment is made, and the differences are discussed. (author).}
place = {Japan}
year = {1992}
month = {Jul}
}