X-ray emission measurements from CO/sub 2/-laser-created plasmas

Journal Article · Mon Aug 01 00:00:00 EDT 1977 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.324214· OSTI ID:7218338

Pepin, H; Grek, B; Rheault, F; Nagel, D J

Results of the interaction of gigawatt nanosecond CO/sub 2/ pulses with various solid targets are reported. The x-ray emission as a function of focusing is not critical within +- 1 mm of the on-target position. The x-ray intensity has an approximate power law dependance of 2.5 with laser energy for all elements. Densitometer analysis of sections of the x-ray pinhole pictures indicate nonuniformities in the plasma and localized hot spots. Line spectra taken with a Bragg crystal indicate temperatures of 200 eV for 4 J of incident energy. Continuum spectra taken with absorbants show characteristic nonthermal behavior, which may be related to parametric instabilities. The x-ray yield as a function of atomic number exhibits a series of peaks which are similar in position to the predictions of a coronal model.

• Research Organization: INRS-Energie, Universite du Quebec, Varennes, Quebec, Canada
• OSTI ID: 7218338
• Journal Information: J. Appl. Phys.; (United States), Vol. 48:8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
LASER-PRODUCED PLASMA
X-RAY SPECTRA
PLASMA DIAGNOSTICS
ALUMINIUM
CARBON DIOXIDE LASERS
COPPER
ELECTRON TEMPERATURE
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
IRON
LEAD
MAGNESIUM
PARAMETRIC INSTABILITIES
POLYETHYLENES
TARGETS
TIN
X RADIATION
ALKALINE EARTH METALS
ELECTROMAGNETIC RADIATION
ELEMENTS
GAS LASERS
INSTABILITY
IONIZING RADIATIONS
LASERS
METALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
POLYMERS
POLYOLEFINS
RADIATIONS
SPECTRA
TRANSITION ELEMENTS
700102* - Fusion Energy- Plasma Research- Diagnostics