Study of EUV emissions from 2XIIB
Initial results from a study of EUV emissions from the 2XIIB experiment are reported. Time-dependent brightness measurements of deuterium, oxygen, nitrogen, carbon and titanium emissions from the central 2XIIB plasma have been made. The deuterium Lyman alpha brightness is 1.5 x 10/sup 17/ photons sec/sup -1/cm/sup -2/sr/sup -1/. The Lyman alpha time development and broad spectral profile are consistent with other knowledge of the 2XIIB plasma. Oxygen is the dominant impurity in 2XIIB. The 0 VI 1032 A brightness is 1.65 x 10/sup 18/ photons sec/sup -1/cm/sup -2/sr/sup -1/. The oxygen concentration is 2% and its estimated confinement lifetime is 300 ..mu..s; this may imply mirror confinement of the oxygen ions. Nitrogen and carbon concentrations are 0.4% and 0.3%, respectively. It is not certain whether these impurities are mirror confined. The titanium concentration is believed to be low compared to that of oxygen. The power loss from the central plasma due to radiation by and ionization of light impurities is approximately 60 kW, which is 4% of the power deposited by the neutral beams. Further studies of impurity sources and penetration are now being performed.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6611666
- Report Number(s):
- UCID-17864; TRN: 78-019486
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
2X DEVICES
EXTREME ULTRAVIOLET RADIATION
IMPURITIES
PLASMA DIAGNOSTICS
CARBON
DEUTERIUM
EMISSION SPECTRA
LYMAN LINES
NITROGEN
OXYGEN
TITANIUM
CRYOGENIC FLUIDS
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUIDS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC MIRRORS
METALS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OPEN PLASMA DEVICES
RADIATIONS
SPECTRA
STABLE ISOTOPES
THERMONUCLEAR DEVICES
TRANSITION ELEMENTS
ULTRAVIOLET RADIATION
700104* - Fusion Energy- Plasma Research- Plasma Kinetics-Experimental- (-1987)