Excitation rate coefficient measurements of Cu XIII and Cu XVII ions

Journal Article · Mon Dec 01 04:00:00 EST 1986 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.34.4751· OSTI ID:7242347

Datla, R U; Roberts, J R; Rowan, W L; Mann, J B

The absolute excitation rate coefficients for Cu XIII and Cu XVII optically allowed transitions have been measured using the Texas Experimental Tokamak (TEXT) tokamak. Cu is injected by the laser-ablation method at a time when the plasma has attained steady-state temperature and density profiles. The absolute intensities of the magnetic-dipole-forbidden transitions within the Cu XIII 3s/sup 2/3p/sup 5/ and the Cu XVII 3s/sup 2/3p ground configurations are measured. The intensities of optically allowed vacuum-ultraviolet lines within the 3p/sup 4/3d-3p/sup 5/ transition array of Cu XIII and within the 3d-3p transition array of Cu XVII are measured with a 2.2-m grazing incidence spectrometer. This instrument is radiometrically calibrated in situ by using the branching-ratio technique. The absolute excitation rate coefficients are deduced from these measurements, assuming coronal equilibrium, optically thin line emission, and statistical population within the ground configuration. The experimental rate coefficients for these transition arrays are found to be 2.84 x 10/sup -8/ cm/sup 3/ s/sup -1/ for Cu XIII at an electron temperature of 127 eV and 3.5 x 10/sup -8/ cm/sup 3/ s/sup -1/ for Cu XVII at an electron temperature of 240 eV. These results are in good agreement with excitation rate coefficients computed in a distorted-wave approximation.

• Research Organization: Atomic and Plasma Radiation Division, Center for Radiation Research, National Bureau of Standards, Gaithersburg, Maryland 20899
• OSTI ID: 7242347
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 34:6; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ABLATION
CHARGED PARTICLES
CLOSED PLASMA DEVICES
COPPER IONS
CROSS SECTIONS
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITATION
HOT PLASMA
IMPURITIES
IONS
MULTICHARGED IONS
PLASMA
PLASMA DIAGNOSTICS
RADIATIVE DECAY
SPECTRA
TEXT DEVICES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES