Published February 2009 | Version v1
Report Metadata-only

First result on Zeff profile analysis from visible bremsstrahlung measurement for different density profiles in LHD

Creators

  • 1. Graduate Univ. for Advanced Studies, Dept. of Fusion Science, Toki, Gifu (Japan)
  • 2. National Inst. for Fusion Science, Toki, Gifu (Japan)

Description

Visible bremsstrahlung emission has been measured using a optimized Czerny-Turner spectrometer newly installed on LHD. The bremsstrahlung emission profile has been successfully observed in some limited discharge conditions having no asymmetric strong edge bremsstrahlung emissions which are originated in the ergodic layer. Zeff profiles are analyzed for peaked, flat and hollow density profiles as the first trial of the analysis. As a result, a flat Zeff profile is obtained for all different density profiles. It indicates that the partial impurity pressure is basically constant against the plasma radius. (author)

Part of:
ITC18: 18th international Toki conference. Development of physics and technology of stellarators/heliotrons 'en route to DEMO'. Proceedings

Additional details

Publishing Information

Imprint Title
ITC18: 18th international Toki conference. Development of physics and technology of stellarators/heliotrons 'en route to DEMO'. Proceedings
Imprint Pagination
523 p.
Journal Page Range
p. 238-241
Report number
NIFS-PROC--78

Conference

Title
18. international Toki conference on development of physics and technology of stellarators/heliotrons 'en route to DEMO'
Acronym
ITC18
Dates
9-12 Dec 2008
Place
Toki, Gifu (Japan)

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
42019046
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
BREMSSTRAHLUNG; LHD DEVICE; MAGNETIC SURFACES; PARTIAL PRESSURE; PLASMA DIAGNOSTICS; PLASMA IMPURITIES; PLASMA RADIAL PROFILES; RADIATION LENGTH; SPECTROMETERS; VISIBLE RADIATION; VISIBLE SPECTRA
Descriptors DEC
CLOSED PLASMA DEVICES; DIMENSIONS; ELECTROMAGNETIC RADIATION; IMPURITIES; LENGTH; MAGNETIC FIELD CONFIGURATIONS; MEASURING INSTRUMENTS; PHYSICAL PROPERTIES; RADIATIONS; SPECTRA; THERMODYNAMIC PROPERTIES; THERMONUCLEAR DEVICES

Optional Information

Notes
5 refs., 6 figs.