Soft x-ray measurements from the PDX tokamak

Journal Article · Sun Aug 01 00:00:00 EDT 1982 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1137135· OSTI ID:5013133

Silver, E H; Bitter, M; Brau, K; Eames, D; Greenberger, A; Hill, K W; Meade, D M; Roney, W; Sauthoff, N R; Von Goeler, S

Temporally and spatially resolved profiles of the PDX soft x-ray spectra have been measured during single tokamak pulses of circular divertor plasmas with a recently developed pulse-height analyzer. This detection system incorporates an array of five vertically displaced sets of lithium-drifted silicon detectors, each consisting of three independent channels optimized for rapid data collection in adjacent energy regions. Simultaneous measurements of x-ray emission integrated along five chords of the plasma cross section can, thereby, be achieved. Abel inversion of these data yields temporally resolved radial profiles of the local electron temperature from the slope of the continuum, concentrations of high-Z impurities from the characteristic line intensities, and a measure of Z/sub eff/ from the continuum intensity. The techniques of x-ray pulse-height analysis, with illustrations featuring the results from the initial PDX circular plasma experiments, are discussed in detail. In addition, comparisons between circular and divertor plasmas on PDX, derived from the x-ray measurements, are also presented.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 5013133
• Journal Information: Rev. Sci. Instrum.; (United States), Vol. 53:8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PDX DEVICES
SOFT X RADIATION
TOKAMAK TYPE REACTORS
DATA ACQUISITION
DIVERTORS
EFFECTIVE CHARGE
ELECTRON TEMPERATURE
EXPERIMENTAL DATA
LITHIUM
MATHEMATICAL MODELS
PLASMA
PULSE ANALYZERS
PULSES
QUANTITY RATIO
RADIATION DETECTORS
SILICON
SPATIAL RESOLUTION
SPECTRA
TIME RESOLUTION
ALKALI METALS
DATA
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
INFORMATION
IONIZING RADIATIONS
MEASURING INSTRUMENTS
METALS
NUMERICAL DATA
RADIATIONS
RESOLUTION
SEMIMETALS
THERMONUCLEAR REACTORS
TIMING PROPERTIES
X RADIATION
700201* - Fusion Power Plant Technology- Blanket Engineering